NFPS Offshore Compression Complexes Project COMP2

COMPANY Contract No.: LTC/C/NFP/5128/20

CONTRACTOR Project No.: 033734

Document Title

:

WEIGHT CONTROL PROCEDURE FOR VENDOR FOR CP6S AND CP7S COMPLEXES

COMPANY Document No.

: 200-20-ST-PRC-00003

Saipem Document No.

: 033734-B-D-00-SPM-SD-P-10002

Discipline

: STRUCTURAL

Document Type

: PROCEDURE

Document Category/Class

: 1

Document Classification

:

Internal

A

08-Feb-2023

Issued for Review

Santi Joedho

Tan Chor Suan

Chandrababu Paramasivam

REV.

DATE

DESCRIPTION OF REVISION

PREPARED BY

CHECKED BY

APPROVED BY

Saipem S.p.A.

Company No._Rev. 200-20-ST-PRC-00003_A

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REVISION HISTORY

Revision

Date of Revision

Revision Description

A1

A

01-Feb-2023

08-Feb-2023

Issued for Inter-Discipline Check

Issued for Review

HOLDS LIST

Hold No

Hold Description

Company No._Rev. 200-20-ST-PRC-00003_A

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TABLE OF CONTENTS

1

2

INTRODUCTION … 5

1.1 PROJECT OBJECTIVE … 5 1.2 PROJECT SCOPE … 5

DEFINITIONS AND ABBREVIATIONS … 7

2.1 DEFINITIONS … 7 2.2 DEFINITIONS OF WEIGHT TERMS … 8 2.3 ABBREVIATIONS … 12 2.4 SYSTEM OF UNITS … 13

3

REFERENCE, RULES, CODES AND STANDARDS … 14

3.1 COMPANY DOCUMENTS … 14 3.2 PROJECT DOCUMENTS … 15 3.3 CONTRACTOR DOCUMENTS … 15 3.4 INTERNATIONAL CODES AND STANDARDS … 15

4

5

6

7

8

PURPOSE OF DOCUMENT … 16

GENERAL REQUIREMENTS … 16

5.1 DISCREPANCIES AND CONFLICTS … 16 5.2 NON-COMPLIANCE/DEVIATION … 16 5.3 VENDOR WEIGHT REPORTING REQUIREMENTS … 16

EQUIPMENT WEIGHT DATA REQUIREMENT … 17

EQUIPMENT WEIGHT AND CENTER OF GRAVITY DATA SHEET… 19

VENDOR EQUIPMENT WEIGHING GUIDELINES… 24

8.1 WEIGHING EQUIPMENT … 24

8.1.1

Small Platform Scale (500 to 2500 kg) … 24

8.1.2

Large Platform Scale (500 to 2500 kg) … 25

8.1.3

Truck Scales/Weigh Bridges … 25

8.1.4

Low Range Tension Type Load Links … 25

8.1.5 High Range Tension Type Load Link … 25

8.1.6 Compression Type Load Cells … 25 8.2 JACKING OPERATIONS … 25 8.3 CALIBRATION OF WEIGHING EQUIPMENT … 26 8.4 NOTIFICATION OF WEIGHING… 27 8.5 ENVIRONMENTAL AND LEVELNESS CRITERIA … 27 8.6 TEMPORARIES DURING THE WEIGHING … 28 8.7 PRE-WEIGHING AUDIT … 28 8.8 WEIGHING OPERATION … 28

8.8.1 Generic Weighing Operating … 29 8.9 CENTRE OF GRAVITY CALCULATION … 30 8.10 EQUIPMENT -SPECIFIC ISSUES … 30

8.10.1 Compression Type Electronic Strain Gauges/Load Cases… 30

8.10.2 Tension Type Load Cells … 31

8.10.3 Truck Scale/Weigh Bridge … 31

8.10.4 Small And Large Platform Scales … 31

9

WEIGHING CERTIFICATE … 32

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10

11

REPORTING … 33

APPENDICES … 35

11.1 APPENDIX 1 SAMPLE DATA SHEETS … 36

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1

INTRODUCTION

The North Field is the world’s largest natural gas field and accounts for nearly all of the state of Qatar’s gas production. The reservoir pressure in the North Field has been declining due to continuous production since the early 1990s. The principal objective of the NFPS Project is to sustain the plateau from existing QG South Operation (RL Dry Gas, RGE Wet gas) and existing QG North Operation (QG1 & QG2) production areas by implementing an integrated and optimum investment program consisting of subsurface development, pressure drop reduction steps and compression. Refer to the figure below for a schematic of the North Field.

Qatargas Operating Company Limited is leading the development of the North Field Production Sustainability (NFPS) Project.

1.1 Project Objective

The objective of this Project includes:

 Achieve standards of global excellence in Safety, Health, Environment, Security and Quality

performance.

 Sustain the Qatargas North Field Production Plateau by installing new Compression Complex facilities CP6S & CP7S in QG south with integration to the existing facilities under Investment #3 program.

 Facility development shall be safe, high quality, reliable, maintainable, accessible, operable,

and efficient throughout their required life.

1.2 Project Scope

The Project Scope includes detailed engineering, procurement, construction, transportation & installation, hook-up and commissioning, tie-in to EXISTING PROPERTY and provide support for start- up activities of the following facilities and provisions for future development. The WORK shall be following the specified regulations, codes, specifications and standards, achieves the specified performance, and is safe and fit-for-purpose in all respects.

Offshore

CP6S and CP7S Compression Complexes that are part of QG-S RGE facilities as follows:

 CP6S Compression Complex

 Compression Platform CP6S, Living Quarters LQ6S, Flare FL6S

 Bridges BR6S-2, BR6S-3, BR6S-4, BR6S-5

 Bridge linked Tie-in to RP6S

Production from existing wellheads (WHP6S & WHP10S) and new wellhead (WHP14S) are routed via riser platform RP6S to compression platform CP6S to boost pressure and export to onshore via two export lines through the existing WHP6S pipeline and a new 38” carbon steel looping trunkline from RP6S (installed by EPCOL). CP6S is bridge-linked to RP6S.

 CP7S Compression Complex

 Compression Platform CP7S, Living Quarters LQ7S, Flare FL7S

 Bridges BR7S-2, BR7S-3, BR7S-4, BR7S-5

 Bridge linked Tie-in to RP7S

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CP7S shall receive production from existing wellheads (WHP5S & WHP7S) and new wellhead (WHP13S). There is only one export line for CP7S through the existing export pipeline from WHP7S. CP7S is bridge-linked to RP7S.

RGA Complex Destressing

Migration of the Electrical power source, Telecoms, Instrumentation and Control systems from WHPs and RHPs hosted by RGA to the respective Compression Complexes listed below:

 WHP6S, WHP10S, WHP14S, RP6S and RP10S to CP6S Compression Complex

 WHP5S, WHP7S, WHP13S and RP7S to CP7S Compression Complex

Destressing of Telecoms, Instrumentation and Control system in RGA Complex Control Room, which would include decommissioning and removal of telecom system devices and equipment that would no longer be required post migration and destressing activity.

Onshore

An Onshore Collaborative Center (OCC) will be built under EPC-9, which will enable onshore based engineering teams to conduct full engineering surveillance of all the offshore facilities. The OCC Building will be located in Ras Laffan Industrial City (RLIC) within the Qatar Gas South Plot. MICC & Telecommunication, ELICS related scope will be performed in the OCC building.

Figure 1.2.1: NFPS Compression Project COMP2 Scope

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2 DEFINITIONS AND ABBREVIATIONS

2.1 Definitions

Definition

Description

COMPANY

Qatargas Operating Company Limited.

CONTRACTOR

Saipem S.p.A.

DELIVERABLES

FACILITIES

All products (drawings, equipment, services) which must be submitted by CONTRACTOR to COMPANY at times specified in the contract. All machinery, apparatus, materials, articles, components, systems and items of all kinds to be designed, engineered, procured, manufactured, constructed, supplied, tested and permanently installed by CONTRACTOR at SITE in connection with the NFPS Project as further described in Exhibit 6.

fabricated,

MILESTONE

A reference event splitting a PROJECT activity for progress measurement purpose.

PROJECT

NFPS Offshore Compression Complexes Project COMP2

SITE

(i) any area where Engineering, Procurement, Fabrication of the FACILITIES related the CPS6S and CP7S Compression Complexes are being carried out and (ii) the area offshore required for installation of the FACILITIES in the State of Qatar.

to

SUBCONTRACT

Contract signed by SUBCONTRACTOR and CONTRACTOR for the performance of a certain portion of the WORK within the Project.

SUBCONTRACTOR

Any organization selected and awarded by CONTRACTOR to supply a certain Project materials or equipment or whom a part of the WORK has been Subcontracted.

WORK

Scope of Work defined in the CONTRACT.

WORK PACKAGE

The lowest manageable and convenient level in each WBS subdivision.

VENDOR

The person, group, or organization responsible for the design, manufacture, testing, and load-out/shipping of the Equipment/ Material.

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2.2 Definitions of Weight Terms

The following terminologies are used in the weight management of NFPS Offshore Compression Complexes Project COMP2.

Definition

Description

Base Weight

Bulk Weight

Base weight is the estimated or calculated final weight of an item or structure at the time of estimation, excluding any allowances. It can be based on historical data, vendor data, weight take-offs from drawings, CAD modelling or weighed weights. The accuracy of this figure will improve during the course of a project. Also known as “Net Weight”.

The weight of all materials and components not included in the Master Equipment List (MEL) or structural steel categories.

Calculated Weight

Weight as calculated from drawings, documents, computer models, Vendor data sheets, and/or Weighed Weights. Calculated Weight excludes any Weight Allowance. Calculated Weight the responsibility of CONTRACTOR and developed by CONTRACTOR.

is

Centre of Gravity (COG)

Imaginary boundary around the COG of a major assembly or individual module that encompasses a reasonable region of uncertainty associated with estimated COG versus actual COG.

Component

Generic term used to describe an individual piece of equipment, bulks, an equipment skid, or a module. When the term is used generically, it may be assumed to apply to any or all of these items.

Content Weight

Weight of gas, liquid, powder, etc. contained by a component in normal operating condition.

Design Margin

Dry Weight

Difference between Weight Budget and Reported Weight, typically established during EPC as a reasonable weight growth quantity intended to accommodate design development. As a component’s design progresses, its Design Margin may have a positive or negative value (“Design Margin” = “Weight Budget” − “Reported Weight”). The Design Margin is developed by CONTRACTOR and COMPANY. Management of the Design Margin is the responsibility of CONTRACTOR. Design Margin is typically set as a trial value in early project planning (e.g., Define Stage). Weight of a component or assembly in its Dry Installed condition. This weight includes permanent utilities, such as gearbox oil, hydraulic oil, filter sand, etc. Dry Weight excludes operating content.

Estimated Weight

Weight as estimated from design sketches, volumetric or area factors, Vendor catalogs, or historical data. Estimated Weight excludes any Weight Allowance. Estimated Weight the responsibility of CONTRACTOR to develop.

is

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Definition

Description

Equipment Maintenance Factor (EMF)

For a single piece of equipment or component: EMF = Layout Space Provided (Required)/Footprint of Item (Project Area on Deck). For a module (all levels): EMF = Total Useful Layout Space Provided (Required)/Total Footprint of All Items at All Levels

Float-Over Weight

Weight of a component or assembly on the barge during a dry tow to site location for floatover installation

Future Weight

Hook-up Items

Lift Weight

Live Load

Load Cases

Weight of facilities planned or anticipated for future installation that will not be onboard during the initial Start-Up phase of the project. Future Weight is based on COMPANY operating scenarios and is under sole control of COMPANY. Future Weight is typically set as a trial value in early project planning (e.g., Define Stage). These components are not present for installation, or temporarily located and installed or relocated, post-installation of the main assemblies. The conditions which exists during lifting of the structure. The weight is including all temporary lifting accessories such as lifting slings, shackles, lifting frame, bumpers and installation guide. It’s also includes other temporary steel work such as internal sea-fastening and support beams for any ship loose items placed on the module or deck. Theoretical load used for design and weight estimating. It is applied to a facility according to the defined function of an area on a deck. Live load typically includes drums, dry goods, stored pallets of materials, laydown area loads, movable equipment, etc., and personnel (where large numbers of people may be a controlling design parameter). Live load also may include snow and ice loads for arctic environments. These are the weight conditions that shall be monitored and reported in the Project Weight Control Report throughout Design and Fabrication. It consists of the following:

Loadout/Lift/Float-Over Dry (In-place) Operating Operating Future

Management Reserve

Not-To-Exceed Weight

Weight account associated with scope change used by COMPANY to accommodate variations in the contractual design concept. Original value is typically established during EPC by COMPANY based on former project experience. Management Reserve is under sole control of COMPANY. Management Reserve is typically set as a trial value in early project planning (e.g., Define Stage) and controlled by COMPANY. Maximum weight figure based on physical or design efficiency constraints, which shall not be exceeded under any circumstance, except through the formal MOC process. NTE Weight is typically set as a trial value in early project planning (e.g., Select Stage) and controlled by COMPANY.

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Definition

Description

Operating Weight

“Operating Weight” = “Dry Weight” + “Content Weight” + “Operating Temporaries” + “Live Loads.”

Offshore Installed Items

Reported Weight

Temporary Weight

Any item or fabricated unit which forms part of another main unit and is transported separately and then installed offshore on the main unit is deemed to be an offshore installed item. For topside, piping hook- up spools are such an item. Weight inclusive of Weight Allowance reported by CONTRACTOR as determined by compilation of Calculated/Estimated Weights and Weight Allowances. “Reported Weight” = “Calculated Weight” / “Estimated Weight” + “Weight Allowance.” Reported Weight is the responsibility of CONTRACTOR and developed by CONTRACTOR. It also known as Factored Weight or Gross Weight. Weight of temporary items that may be installed for a specific temporary function at a certain stage of the project (e.g., scaffolding, welding equipment, or temporary housing). These items are assumed to be removed or moved to their permanent location after their temporary purpose is completed. Temporary Weights are developed by CONTRACTOR and COMPANY.

SUB-CONTRACTOR

Party who is providing subcontracting services specified and ordered by CONTRACTOR.

VENDOR

Weight Allowance

Weight Budget

Weight Contingency

Party who supplies equipment and/or material and perform associated services.

Incremental weight added to the Calculated/Estimated Weights to account for undefinable/uncertain weights that cannot be specified at the reported project phase but will materialize upon further project definition (e.g., mill tolerances, fabrication tolerances, weld material, paint, or incomplete or immature design details). CONTRACTOR is responsible for development and application of Weight Allowances. Project weight reference as a control during the design, fabrication, and installation process. Weight Budgets shall only be updated as a result of change to the design basis and shall be captured by the MOC process (e.g.changes to the execution strategy, changes to statutory regulation, or safety). Weight Budgets are typically developed during EPC by Engineering CONTRACTOR and COMPANY and then approved by COMPANY and managed by CONTRACTOR. Difference between NTE Weight and Weight Budget used to accommodate known futures and features added by COMPANY that are outside the contractual scope of CONTRACTOR’s work. “Weight Contingency” = “Management Reserve” + “Future Weight.” Alternatively, “Weight Contingency” = “NTE Weight” − “Weight Budget.” Weight Contingency is under sole control of COMPANY.

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Definition

Description

Weight Estimate Contingency

Weight Management

Difference between NTE Weight and Reported Weight Select/Early Define Stage before Test Weight Budget is set. If NTE cannot be determined, then it may serve as general percentage to transform Reported Weight into a preliminary NTE and as basis for engineering/execution.

in

Encompasses a system of weight calculating/estimating, tracking, reporting and trending to facilitate design decisions that affect the weight of a facility. At any project stage, current Reported Weights can be compared to previously Reported Weights to detect beneficial and adverse weight/COG trends in design development. Then, steps can be taken to potentially mitigate design issues that result in unfavourable weight/COG changes in order to maintain final Reported Weights / COGs within established Weight Budgets and COG Envelopes.

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2.3 Abbreviations

Code

Definition

North Field Production Sustainability

Front End Engineering Design

Engineering, Procurement, Construction and Installation.

Qatargas Operating Company Limited

Centre of Gravity

Elevation

Issued For Review

International Organisation for Standardization

Lowest Astronomical Tide

Master Equipment List

Mean Sea Level

Material Take-Off

Not Applicable

Project Management Team

Management of Change

Special Pipe Support

To Be Advised

Top of Steel

Weight Data Sheet

Heating Ventilation and Air Conditioning

Waste Heat Recovery Unit

NFPS

FEED

EPCI

QG

COG

EL

IFR

ISO

LAT

MEL

MSL

MTO

NA

PMT

MOC

SPS

TBA

TOS

WDS

HVAC

WHRU

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2.4 System of Units

Weight reporting shall utilize the project’s unit system (U.S. customary or SI) as agreed to by COMPANY and CONTRACTOR. All units used in the report shall be as follows:

Length Metres

Width Metres

Elevation Metres

Distance Metres

Mass Kilogram

(m)

(m)

(m)

(m)

(kg)

Weight Metric Tonnes

(MT)

Liquid Volume Metres

(m³)

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3 REFERENCE, RULES, CODES AND STANDARDS

The following codes, standards and specification are referenced within the document shall be considered as part of this specification. Conflict among applicable specification and / or codes shall be brought to the attention of the COMPANY for resolution COMPANY decision shall be final and shall be implemented. The latest editions of codes and specification effective as on date of contract shall be followed.

In general, the order of precedence shall be followed:

a) Qatari Governmental and Regulatory Requirements

b) COMPANY Procedures, Policies and Standards (Exhibit 5 Appendix I)

c) Project Specifications.

d) Industry Codes and Standards

e) COMPANY and CONTRACTOR’s Lessons Learned

If CONTRACTOR/SUBCONTRACTOR deems any deviations from the specifications will result in significant project cost and schedule saving, proposal to such deviations shall be submitted to COMPANY for review and approval. CONTRACTOR/SUBCONTRACTOR shall not proceed with any deviation to the specifications without prior COMPANY approval. In general, all design activities shall conform to legal and statutory regulations, and recognized industry best practices.

3.1 Company Documents

S. No

Document Number

Title

PRJ-PJL-PRC-004_07

Facilities Engineering and Vendor Document Numbering Procedure

PRJ-PJL-PRC-005_21

Facilities, System and Unit Number Codes and Descriptions Procedure

PRJ-PJL-PRC-006_01

Project Information Handover Procedure

PRJ-PJL-PRC-007_01

SmartPlant Engineering Applications & Drafting (CAD) Standard

PRJ-PJL-PRC-008_15

Equipment Numbering Philosophy

PRJ-PJL-PRC-048_11

PRJ-PJL-PRC-049_01

Facilities Documentation Metadata Requirements Procedure Project Acceptance Procedure

Information Handover, Verification

and

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3.2 Project Documents

S. No

Document Number

Title

LTC/C/NFP/5128/20

Contract Agreement

EXHIBIT 5

Project Instructions

EXHIBIT 6

Scope of Work

3.3 Contractor Documents

S. No

Document Number

Title

Not Applicable

Not Applicable

3.4

International Codes and Standards

S. No

Document Number

Title

ISO 19901-5 2nd Edition 2016-02-15

Petroleum and Natural Gas Industries – Specific Requirements for Offshores – Part 5: Weight Control during Engineering and Construction.

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4

PURPOSE OF DOCUMENT

This Weight Management Procedure for Vendor defines the basic weight data and weighing requirements for equipment and skids supplied for NFPS Offshore Compression Complexes Project COMP2.

5 GENERAL REQUIREMENTS

5.1 Discrepancies And Conflicts

Codes and standards to be applied shall follow the order of precedence listed in section 3.

Where a conflict exists among codes, standards and specifications the most stringent provision shall govern unless otherwise agreed with COMPANY.

5.2 Non-Compliance/Deviation

If any requirements of this specification cannot be met, VENDOR/SUPPLIER must provide written notification of non-compliances, with explanations, in accordance with the project instructions. This notification will be evaluated and must have COMPANY approval before final acceptance.

5.3 Vendor Weight Reporting Requirements

The purpose of this Procedure is to define the degree of Weight Management documentation required for VENDOR-supplied equipment to be installed permanently or temporarily at any stage of the construction, transportation, integration, installation, or operation of the NFPS Offshore Compression Complexes Project COMP2. VENDORs shall provide the requested weight and centre of gravity (COG) information for each primary or ancillary equipment item to be delivered.

While some equipment may be exempt from individual weighing, nothing is exempt from weight reporting.

For the purposes of this document, information is assumed to flow between the VENDOR and the PURCHASER. Information distribution arrangements between COMPANY and CONTRACTOR will be project specific but, in many cases, information may be concurrently copied to COMPANY and CONTRACTOR when it is released. Such specifics are beyond the scope of this document. Project- specific document control guidelines are to be consulted and followed.

All VENDORs and Fabrication Subcontractors will be required to provide weight information on equipment, plant, temporary works, and material which is used in the project construction as an essential part of their contractual obligations. VENDOR and Fabrication Subcontractor weight data requirements will be specified at the time of the material requisitions. Weight information requirements will vary depending upon the expected weight and the complexity of the equipment. Generally, information to be supplied is to include but is not necessarily restricted to the following:

Dry weight and COG for the item as it will be installed, to include any auxiliaries

1. Weight and COG of the item’s normal operating content

2. Weight of the item in the normal operating condition

3. Weight of any auxiliaries, such as lubricants, hydraulic oil, etc.

4. Test weight (e.g., filled with water)

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5. Transport weight

6. Weighing certificate

VENDOR in its quotation is to allow for the provision of weight-related information and services as specified in this document and project-specific specifications.

VENDOR shall include weight and COG estimate(s) on COMPANY-furnished Weight Data Sheets in accordance with the schedule presented below. An alternative VENDOR furnished format, such as a certified equipment drawing, may be substituted for the COMPANY’s Weight Data Sheets contingent on the same information being provided:

a) Weight data on VENDOR supplied equipment is to be provided through certified equipment drawings or weight data sheets at the bid stage, within 1 month after Purchase Order issue, and just prior to the shipment of the equipment to site.

b) An initial weight and COG estimate is to be furnished with the bid.

c) A reviewed and updated preliminary weight and COG estimate for each item to be delivered is

to be furnished within 30 calendar days of Purchase Order receipt.

d) All weight updates issued after receipt of order are to be issued with an additional copy to the

attention of the Project Weight Control Engineer.

e) Standard catalogue data for standard items will be acceptable only if they apply directly to the equipment item and if they are in accordance to the weight data requirements indicated.

f) For specialty designed items, VENDOR shall provide weight and COG data based on approved construction drawings. This information shall be included on a weight data sheet.

g) The weight and COG must be updated by VENDOR following any Change Order which will

affect the weight of the item.

h)

Interim weight updates will be required if the weight fluctuations exceed 5 percent of the post- award stage weight.

i) VENDOR is to provide COMPANY, on request, with access to all information needed to audit

the VENDOR’s weight and COG estimates.

j) Within 1 week after weighing an item, updated weight and COG information shall be furnished

to PURCHASER. The weighing certificate shall be attached.

k) Final weight and COG documentation (final weight data sheet, certified drawing, or weighing certificate, as applicable) must accompany the equipment when delivered. Additionally, a copy of the final weight and COG documentation must be sent to the attention of COMPANY and the Project Weight Control Engineer on or before the date that the equipment leaves the VENDOR’s facility.

6 EQUIPMENT WEIGHT DATA REQUIREMENT

The quality of VENDOR weight data may evolve through the various information submittal cycles; however, the final weight data requirements will, by default, be a function of the anticipated weight. Nothing is exempt from weight reporting, however, the quality of the reported information may fluctuate within the guidelines specified.

In general, individuals who generate weight and COG estimates are in the best position to assess the accuracy of the estimate. VENDORs are required to provide weight, COG, and a suggested allowance that realistically reflects the accuracy to which the weight has been estimated for each piece of reported equipment.

Threshold weights are to be established to delineate weight verification or weight and COG verification requirements. COMPANY may choose to specify project-specific guidelines that establish special

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weight reporting and weighing requirements related to the relative weight and/or to the relative complexity of the equipment being reported; otherwise, the defaults specified in this document shall be applied. The minimum requirements are as follows:

1. Unless COMPANY specifies otherwise, the lower threshold weight shall be set at 1000 kg and

the upper threshold weight shall set at 10000 kg.

2. Equipment weighing at or above the upper threshold weight shall have weight and COG verified by direct measurement. The information is to be presented on a weight data sheet showing the weight, COG and a cross reference to the VENDOR equipment arrangement drawing.

3. Equipment weighing more than the lower threshold but less than the upper threshold weight shall have weight verified by direct measurement and an estimated COG. This information is to be presented on a weight data sheet showing the weight, COG, and a cross- reference to the VENDOR equipment arrangement drawing.

4. Equipment weighing less than the lower threshold weight shall have a weight data sheet showing catalogue data, estimated weights, or calculated weights with an estimated COG, and a cross-reference to the VENDOR equipment arrangement drawing. VENDOR is to certify the accuracy to which the weight and COG is reported.

Identical equipment, each weighing less than the lower threshold weight but with a combined weight at or above the lower threshold weight, shall have sample weighing for sets of identical equipment and estimated COGs. A weight data sheet showing the weight, the COG and a cross-reference to the VENDOR equipment arrangement drawing shall also be required.

Identical equipment, each weighing more than the lower threshold but less than the upper threshold weight, shall have sample weighing for sets of identical equipment verified by direct measurement and an estimated COG. The information is to be presented on a weight data sheet showing the weight, COG, and a cross-reference to the VENDOR equipment arrangement drawing.

Threshold weight limits are intended to apply to an entire equipment assembly. Reporting equipment weights by smaller components as a mechanism to avoid weighing or to reduce weight reporting requirements is not acceptable.

Final certified equipment weights are to be submitted by VENDOR at the time of shipment of the equipment or earlier, if available.

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Depending on the project execution strategy, on an exception basis, the requirement to weigh a specific piece of equipment may not be known at the time of equipment requisition. In such circumstances, as specifically requested by COMPANY or PURCHASER, associated procurement documents shall include terms for a priced line item for weight and COG confirmation. The wording is also to include a milestone date or time frame in which the decision to weight the item can be communicate to the VENDOR without adversely affecting cost or scheduling.

7 EQUIPMENT WEIGHT AND CENTER OF GRAVITY DATA SHEET

The VENDOR may use a Weight Data Sheet or certified drawing, showing the same information, to report the weight, accuracy, and COG. The weights and COGs are required for the following conditions: dry, operating, and hydrotest. Weight and COG units shall be clearly indicated. If tons are used, the type of tons (long, short, or metric) shall be clearly specified. The minimum information requirements are as shown on the marked up Data Sheet shown in . An unmarked sample of the Equipment Weight & Centre of Gravity Data Sheet is provided in the Appendix of this Specification.

If multiple identical pieces of equipment are being furnished, a separate Weight Data Sheet is needed for each piece since the project specific tag number should be different for each piece of equipment.

Certain fields are to be populated by VENDOR and certain fields are to be populated by PURCHASER. At the time when the Purchase Order is placed, PURCHASER is to furnish VENDOR with the project- specific referencing information so that it is clear what equipment is being documented on the data sheet at the time of submittal.

The following instructions apply to the Equipment Weight & Centre of Gravity Data Sheet shown in . A blank sample of the Data Sheet has been provided in the Appendix of this Specification to be filled out and returned to PURCHASER. At VENDOR’s request, an electronic version of the Data Sheet will be provided by COMPANY via E-mail.

Table 7.1 –Instruction for Equipment Weight and COG Data Sheet

Item #

Required/Optional

Instruction

Item 1

Required

Item 2

Required

Item 3

Optional

VENDOR Enter Vendor name or the name of the party furnishing the information.

VENDOR Enter the purchasing information, inclusive of Purchase Order number, Purchase Order item number, and requisition number as available.

Vendor Enter the specification number references for the item for which the weight data sheet is being generated.

Item 4,5 & 6

Required

VENDOR Enter the Project name, Customer name, and Project number, or Job number used by the Vendor.

Item 7

Required

Item 8

Required

VENDOR Enter appropriate data sheet revision indicator each time updated information for this equipment item is provided.

VENDOR Enter specific equipment identifier (other than Purchase Order number and tag number) that may be in use for the item described on the Equipment Weight & COG Data Sheet.

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Item #

Required/Optional

Instruction

Item 9

Required

Item 10

Required

Item 11

Required

Item 12

Optional

Item 13

Optional

VENDOR Provide brief description of the item. (Indicate how many of these items are being supplied)

VENDOR Indicate the issue date of this revision of the weight data sheet.

VENDOR Enter the project-specific tag number used for identifying this equipment item. This should be the same tag number as used elsewhere on the project.

PURCHASER Enter the P&ID No. where the equipment is called out.

PURCHASER Enter Equipment Layout Drawing number or General Arrangement Drawing number where the equipment location is identified.

Item 14

Required

VENDOR Enter the Manufacturer of the equipment item.

Item 15

Required

Item 16

Required

Item 17

Required

Item 18

Required

Item 19

Optional

Item 20

Required

Item 21

Required

Item 22

Required

VENDOR Enter the model number of the equipment item as appropriate.

VENDOR Enter the model number of the equipment item as appropriate.

VENDOR Enter name of person originating the weight information.

VENDOR Enter the origination date of the information (this may not necessarily be the same as the issue date of the weight data sheet).

PURCHASER Document the input, check, and approval process for the incoming information. Person entering the PURCHASER required fields would indicate initials in “By” column and date the information was entered. The persons checking and approving the information would do likewise. This is a QC process to ensure the data being officially passed on to the Project Weight Control Engineer is complete.

VENDOR Indicate the units used. There are multiple areas where units are requested. The units used for that area of the data sheet are to be entered. If tons are the unit of choice, then the type of tons (long tons, short tons, metric tonnes) is to be specifically mentioned. Metric units are preferred. Where practical, use of the same units should be maintained.

VENDOR Enter dry, operating, and test weights without allowances in the appropriate column reflective of the quality of the weight data.

VENDOR Enter an allowance as a percentage that Vendor feels should be applied to the base weight reported. This reflects the level of confidence the Vendor has in the estimated weight. If no percentage is displayed the reported weight will be taken at face value. Note that any value entered here is for

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Item #

Required/Optional

Instruction

Item 23

Required

Item 24

Required

Item 25

Required

information only. It is up to the Project Weight Control Engineer to use project standard allowances or to use the allowance indicated by the Vendor.

VENDOR Check off weight status that is appropriate for the weight data being conveyed.

VENDOR Provide a dimensioned sketch - plan view, and elevation, or an isometric representation - of the equipment and show orientation (e.g., north indication), support points, and relate COG position to a convenient reference point. to an attached equipment Alternatively, a arrangement drawing that conveys the same information may be entered. If VENDOR does not know the orientation, PURCHASER shall put the orientation indication on the sketch.

reference

VENDOR Provide Vendor drawing number for equipment arrangement drawing that shows the COG dimensioned from a clearly designated reference and which lists the weight.

Item 26

Required

VENDOR Enter overall sizes.

Item 27a, 27b, 27c

Required

VENDOR Enter COG dimensions for the dry, operating, and test conditions.

Item 28

Required

Item 29

Required

Item 30

Required

Item 31

Required

Item 32

Required

PURCHASER Enter the angle between the global longitudinal (X) axis and the equipment longitudinal axis when in the installed position. This will be 0 degrees when aligned, 90 degrees when at right angles, and somewhere in between for other cases. Care must be taken when considering the location of the origins within each system.

VENDOR Run through weight check list and indicate missing and/ or tare weights as needed. “N/A” may be placed in remarks column when item is not applicable. Of particular importance here is weight estimates on ancillaries and hook- up ship-loose items that may have been excluded from the reported weight or packing material that may have been included in a weighed weight.

VENDOR Enter the Dry weight components inclusive of the weight with no contents and the weight of contents considered to be part of the dry weight. This would typically include lubricating and/or hydraulic fluids in closed loops. If multiple “dry” contents are present they are to be indicated in the remarks column. The total dry weight is then listed.

VENDOR Enter operating content weights for the normal operating condition and the %fill level this represents.

VENDOR Enter the total operating weight inclusive of the operating fluids.

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Item #

Required/Optional

Instruction

Item 33

Required

Item 34

Required

Item 35a, 35b, 35c

Required

VENDOR Enter the total test weight when the equipment is full of fluid for testing and commissioning purposes.

VENDOR Provide equipment item

the maximum

lifting weight

for

the

VENDOR Identify the heaviest maintenance item (motor, pump, etc.) that may need to be removed from the equipment for maintenance. The weight and dimensions of this item are to be indicated.

Item 36a, 36b, 36c

Required

VENDOR Identify dimensionally largest component if different from heaviest component.

Item 37

Required

Item 38

Required

Item 39

Required

VENDOR Indicate reference drawing where maintenance lift information is presented.

VENDOR Enter any qualifying statements or comments deemed to be relevant regarding the reported information.

VENDOR Enter the total number of pages in the submittal including the weight data sheet and any attachments.

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Figure 7.1 Mark-Up of Equipment Weight and COG Data Sheet

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8 VENDOR EQUIPMENT WEIGHING GUIDELINES

Weighing operations are within the scope of the VENDOR. The weighing shall be planned and conducted so that the weighing will confirm(s) and as applicable centre(s) of gravity without ambiguities. The following provides some general weighing guidelines for equipment items or skid components.

Unless specifically indicated otherwise, any item expected to weight at or above 1000 kg is to have its weight confirmed by direct measurement. Additionally, any item expected to weight at or above 10000 kg is to have its COG confirmed by direct measurement.

An appropriate weighing method is to be agreed on between VENDOR and PURCHASER in accordance to COMPANY specification.

8.1 Weighing Equipment

The type of weighing equipment acceptable for use will be a function of the dimensional properties and the anticipated weight of the item in question. Weighing equipment shall be sized so that they operate between 20 percent and 80 percent of their capacity. In selecting weighing equipment, several factors shall be considered. Weighing Equipment shall:

i. Have a measurement uncertainty to within one percent.

ii.

Be easy to use so that operational errors are minimized and training requirements are not arduous.

iii. Have easily accessible weight result readouts; the results shall be displayed with the same

degree of accuracy as that of the weighing equipment.

iv. Have high durability so that use and abuse in an industrial setting will not lead to frequent

breakdowns.

v. Have readily available spares in order to minimize delays caused by faulty weighing equipment.

Where practical, the weighing equipment selected for use should fit into the normal operations of the fabrication facility. The objective is to try and make the weighing a seamless part of the overall operation with minimal impact on schedule.

The use of weighing equipment other than that specified in the Subsections below is to be specifically approved by COMPANY for specific weighing on a case-by-case basis.

The equipment listed below is acceptable for items weighing less than 10000 kg but, of those listed; only compression type load cells (see Section 8.1.6) will be acceptable if COG verification is a requirement.

In the case of bulk items, VENDOR shall carry out random weighing at COMPANY request.

The following equipment types will be acceptable provided they meet the COMPANY specified accuracy requirements.

8.1.1 Small Platform Scale (500 to 2500 kg)

This type of scale may be used in a warehouse setting for regular shipping activities. In additional, a scale of this size is useful for conducting sample weighing of small bulk items that would be used to confirm catalogue weights. Such bulk items would usually include such things as piping fixtures and valves, electrical penetrations, etc.

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8.1.2 Large Platform Scale (500 to 2500 kg)

Again this items may be used in warehouse setting. It would be used to weigh palletized or heavier items.

8.1.3 Truck Scales/Weigh Bridges

Government certified (e.g., Department of Transportation certified) truck scales may be used for weighing of pre-authorized shipments provided specific guidelines are followed (see Section 8.10.3).

8.1.4 Low Range Tension Type Load Links

This type of weighing equipment is installed between the crane hook and the rigging. The small range load cells are used to weigh bulkier equipment items that cannot be readily weighed on the platform scale when centre of gravity confirmation is not a requirement. They may also be used to weigh smaller structural components, or bulk items such as a bundle of pipe. Wireless remote readouts are preferred.

8.1.5 High Range Tension Type Load Link

This equipment may be used to weigh major structural components or major equipment components that exceed the capacity of the smaller load cells when centre of gravity confirmation is not a requirement. If the component is to be lifted anyway, then no additional design is typically required to develop padeyes, etc. Wireless remote readouts are preferred.

8.1.6 Compression Type Load Cells

These cells are most effectively utilized in situations where the load is elevated on stands or skid beams. Therefore, it is relatively easy to jack up the load (provided suitable “hard points” are available) and use compression type load cells. Provided the load is kept level and the jacking points are known, the horizontal COG of the lifted component can easily be determined. The interface between the load cells and the component shall be equipped with a spherical seating (tilt saddle) or equivalent, in order to minimize the introduction of horizontal forces into the load cell.

8.2 Jacking Operations

If a jacking system is employed in lifting the item being weighed, it shall produce uniform vertical movement at all weighing points.

The weight of the component being weighed shall be directly applied to the load cells, either by jacking up and lowering onto the load cells (load cells adjacent to jacks), or by jacking the load cells up to the assembly and then lifting (load cells on top of the jack or inside the hollow of the jacks).

When the load cells are positioned adjacent to the jacks, the assembly shall be lowered smoothly and uniformly onto the load cells.

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8.3 Calibration of Weighing Equipment

For weighing of items less than 10000 kg, the weighing equipment used shall have a calibration certificate less than 1 year old and accuracy better than 1 percent over its working range. For weighing above 10000 kg, the equipment is to have been calibrated within the last 6 months and have an accuracy better than 1 percent over its working range. The actual accuracy of the weighing device used for the weighing must be stated. Weighing equipment documentation shall be sent directly to PURCHASER. In the case of equipment exceeding 10000 kg, calibration certificates shall be furnished for PURCHASER and COMPANY review no less than 30 days prior to the weighing unless alternative timing has been specifically agreed to by COMPANY.

The calibration shall be performed over the full working range of the weighing equipment and so documented in the calibration certificates.

Calibration shall be performed by a testing laboratory or organization accredited to calibrate the specified type of equipment by the official national accreditation body, in accordance with a recognized standard.

A copy of the calibration procedure and the recognized standard that it is following is to be provided to PURCHASER and COMPANY for review and acceptance 2 months prior to the proposed calibration date.

PURCHASER and COMPANY shall be given 3 weeks written notification of the calibration date and location.

Calibration frequency shall be as follows: For equipment and skid assemblies:

1. Less than 10,000 kg, the weighing equipment shall have been calibrated within the last 12

months.

2. 10,000 kg and above, within the last 6 months.

There are two methods of performing the calibration.

1. If the output on the read-out unit is dependent on cable lengths, the whole weighing system, (e.g., the load cells, cables, read-outs, and amplification devices) shall be calibrated as one system.

2. If the output on the read-out unit is not dependent on the cable lengths, the load cells shall be calibrated independently (mechanical calibration), followed by electrical calibration on site and prior to weighing. The electrical calibration shall be performed using a precision strain gauge calibrator. Both the calibrator and the read-out unit shall have valid calibration certificates.

The calibration certificates shall list type, serial number, accuracy, and reference to the master load cell.

The calibration certificate(s) shall be available for COMPANY inspection prior to commencement of weighing. If components to be weighed exceed 10000 kg, the calibration certificates shall be provided to the PURCHASER and COMPANY a minimum of 30 days prior to the weighing.

When it is anticipated that the equipment will be operated in a temperature range outside the Manufacturer’s published norms, then, with consultation with the Manufacturer, special provisions shall be taken to either obtain a calibration within the expected temperature range or to obtain a temperature correction curve from the Manufacturer.

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8.4 Notification of Weighing

At an agreed upon period in advance of the final weighing of the equipment, VENDOR shall furnish the PURCHASER with written notification of the intended date, time, and location of the weight and/or COG verification and shall submit a weighing procedure for approval. VENDOR shall confirm the date, time, and location 5 business days prior to the weighing.

For equipment and skid assemblies, the notification period shall be 30 days.

For larger assemblies, such as buildings, the notification period for establishing the initial weight verification window shall be 60 days. The intended date, time, and location shall be further refined at least 2 weeks prior to weighing.

Alternative notification periods may be adopted subject to the nature of what is being weighed and subject to COMPANY approval.

8.5 Environmental and Levelness Criteria

The accuracy of the weighing results and, when applicable, the associated COG indication is a function of the wind forces and levelness of the lift as well as equipment-related accuracy. The influence of the wind and levelness is a function of the overall geometry of the component, the vertical centre of gravity, and the lift configuration. Prior to the weighing, as appropriate for the item being weighed, levelness and environmental criteria for conducting the weighing is to be agreed to by PURCHASER in compliance with COMPANY specifications.

In the absence of any other agreement, the following criteria shall be used:

1. During a weighing, the wind speed (10-minute average) shall not exceed 10 knots (~5m/s). Within this criterion, the gusts shall not exceed changes of more than 5 knots (~2.5 m/s). If the wind is outside these criteria, the weighing shall be postponed. CONTRACTOR shall provide wind-measuring equipment.

2. If during the weighing, indicated weights visually fluctuate with wind gusts, weight readings are

to be recorded during the lulls between gusts.

3. The typical range of temperature at which weighing may occur, is between –5ºC and +30ºC, or within the temperature range specified for the actual weighing equipment while still maintaining the requirements for accuracy. In extreme environments where extreme heat or extreme cold is the norm, the weighing equipment Manufacturer should be consulted.

4. When centre of gravity is being confirmed through a weighing process, the location of the load cells with respect to the component coordinate system shall be measured and recorded.

5. When centre of gravity is being confirmed through a weighing process, during weighing and jacking operations the reference plane of the component must remain level. Each lift shall be raised within 10 mm of level.

As deemed appropriate for the item being weighed, wind and levelness shall be measured and recorded throughout the exercise so that a correction factor may be applied to the result if appropriate.

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8.6 Temporaries During the Weighing

Weighing shall be performed prior to the installation of any packing materials.

Temporary items are to be kept to a minimum and shall not exceed 5 percent of the predicted weight. COMPANY shall agree in advance to any exceptions to the percentage of temporaries.

The entirety of the following items shall be removed from the component before the weighing.

1. Construction equipment and services not forming part of the permanent configuration and are

no longer required for performing CONTRACTOR’s scope of work.

2. Snow, ice, and water. If not practical, the quantity and location of these shall be assessed and

reported in the pre-weighing report.

Items that cause undetermined forces on the assembly. This would include restraints, external scaffolding, access ladders, commissioning piping tie-ins, and cables or utility lines that may be hanging off.

8.7 Pre-Weighing Audit

A pre-weighing audit of the component shall be conducted. This is a process where the status of the component is established by recording items to add, move, or delete, inclusive of weights and centres of gravity. An inventory is compiled to reflect fabrication status particularly in reference to uninstalled items or materials. The weight of all temporary items that do not form part of the final in-place configuration shall be calculated.

Detailed photographs shall be taken to visually document the construction and/or installation status of the component. The weight and COG for all missing items during the weighing shall be calculated or separately weighed. The weighing result shall be adjusted accordingly.

Particular care shall be taken with respect to equipment, which has been hydrotested. Where practical, lines will be emptied to ensure that no water has pocketed in the line. Any fluid remaining is to be quantified with a weight and COG assignment.

8.8 Weighing Operation

Weighing shall be conducted in accordance with the guidelines in this Section using a method agreed upon between the VENDOR and the PURCHASER.

The accuracy of the weighing is a function of the reading accuracy of the scale and the calibration accuracy of the weighing equipment. The calibration accuracy may be determined from the calibration certificate for the weighing equipment. The accuracy to which the scale can actually be read will be a function of environmental conditions. It is therefore important that the actual reading accuracy obtained during the weighing is recorded.

The weighing operation shall be planned so that the weighing equipment is not utilized below 20 percent or above 80 percent of the rated capacity as stated by the equipment Manufacturer. Whenever possible, but subject to environmental conditions, the weighing shall be performed during daylight. If not, CONTRACTOR shall provide lighting to give good visibility to all working and inspection areas.

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8.8.1 Generic Weighing Operating

Generically, a weighing operation shall consist of the following steps regardless of the type of equipment being utilized. Some steps, such as establishing levelness, will not be applicable for some weighing equipment types such as tension type load cells or platform scales. Regardless of the weighing equipment used, confirming that the equipment is calibrated, confirming initial and final unloaded readings, obtaining repeatability in the readings, monitoring outside influences, and communicating the results are all key components of a weighing. The general steps are as follows:

1. Calibration certificates shall be checked against the weighing equipment provided in order to

ensure matching serial numbers.

2. A test lift shall be performed before the actual weighing commences to ensure everything is

working as expected.

3. The weighing equipment is “zeroed.”

4. When a lift is involved, the assembly shall be lifted clear of all supports and with a minimum air

gap of 10 mm.

5. Should centre of gravity confirmation be required, the previously agreed upon levelness

criterion shall be adhered to.

6. Weight readings shall be taken when the readings have stabilized.

7. Unless previously demonstrated as not applicable, actual wind speed and direction and the levelness of the lift are to be measured and recorded concurrently with the load cell readings. A correction to the weighing result is to be applied in post processing as required.

8. Following each lift, and after readings have been noted and witnessed, load cells shall be completely unloaded, and the reading and display returned to zero. If practical to do so, in an effort to detect whether horizontal forces are affecting the indicated result, the load measuring device shall be rotated through 120 degrees around its vertical axis for the next lift. To help ensure that the load cell position does not change through the rotation process, it is advantageous to mark the load cell positions top and bottom prior to commencement of the exercise.

9. After the load has been removed from the load cells, any residual weights shown on display

units shall be recorded and the weight amended accordingly.

10. If the residual amount is excessive, the equipment shall be checked and previous results

disregarded.

11. For each weighing operation, a minimum of three lifts/weighings/readings shall be required after which the results are checked for consistency. The total weight of an assembly as measured for each of the lifts shall not vary from the average of the total weights by more than 0.7 percent.

12. A fourth and subsequent lifts shall be required at PURCHASER discretion in any of the following

events:

a. Inconsistent weighing results

b. Mechanical/electrical fault or failure

c. Overloading equipment

d. Adverse weather conditions

In these cases, VENDOR shall make provision to interchange load cell positions if PURCHASER so requests.

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13. As available, VENDOR shall ensure that results are to PURCHASER satisfaction before

demobilizing the weighing system.

14. Prior to demobilization the final “zero” weight is recorded.

15. The weighed weight will be taken as the average of the three accepted weighing results.

16. The weighed weight, centre of gravity position, and the corresponding accuracies will be

computed from these measurements.

17. Documented adjustments to the weighed weights are to be made for any tare weights (packing material, etc.) that may have been in place during the weighing and any missing items, such as equipment trim, that were not in place for the weighing. An accounting of how the tare weight and other adjustments were determined is to be provided. This may be done by separate weighing or a calculated material take-off.

18. VENDOR shall obtain signatures of all inspectors, surveyors, or witnesses that the

PURCHASER has specified to acknowledge witnessing the measured weight data.

19. If requested by PURCHASER, after the weighing, VENDOR shall provide assistance to

reconcile weight and centre of gravity deviations from the projected values.

8.9 Centre of Gravity Calculation

The COG shall be calculated from the results of the individual lifts and the average used as the final COG.

Datum lines utilized for the calculations of the COG locations shall be consistent with the project weight control coordinate system and shall be shown on the report sketches.

8.10 Equipment -Specific Issues

In addition to the generic weighing operation, specific weighing equipment will require additional attention as listed below.

8.10.1 Compression Type Electronic Strain Gauges/Load Cases

The weighing system shall consist of electronic strain gauge load cells. Other types of load cells may be used only with COMPANY approval.

The load cells shall be equipped with a spherical seating (tilt saddles), or equivalent, in order to minimize horizontal forces.

The loads on each load cell shall be indicated and read simultaneously on a digital display using a central console.

Each individual load cell shall have a measurement uncertainty better than 0.5 percent of rated capacity. The measurement uncertainty of the weighing system as a whole shall be within 1 percent of actual weighed weight.

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8.10.2 Tension Type Load Cells

If tension type load cells are used, the following additional guidelines should be followed:

1. For wireless remotes, ensure that the batteries are fresh and that a signal is received. For wired remotes, ensure that there are no shorts in the wire and that the wire is laid out so that it will not interfere with the lift.

2. With the lift rigging hanging loose and not swinging, either deduct out the weight of the rigging or record the indicated weight of the rigging. If the rigging weight is below the capacity of the load cell, then a separate rigging weight for items below the load cell, inclusive of slings, shackles, spreader bars, wire, and chain shall be established by some other acceptable means.

3. The component is lifted until it clears the supports and a measurement reading is taken.

4. The component is set down until the indicated weight is close to zero and then the process is

repeated.

5. The rigging is disconnected and the indicated weight of the rigging is again recorded.
6. The weighed weight shall be taken as the average of the three readings minus the average

rigging weight.

8.10.3 Truck Scale/Weigh Bridge

If a truck scale is used for a weighing then the weight of the truck and trailer without the component must be established just prior to loading on the component and then immediately after loading the component. If multiple components are to be included in the same transport vehicle then the vehicle must be run over the truck scale just prior to and just after loading each component.

The scale tickets for each trip over the scale shall be provided as backup material. Additionally, a listing and weight estimate of any tie-down material installed prior to the weighing shall be presented.

8.10.4 Small And Large Platform Scales

Corrections for packing material and pallets are normally required unless the weighing can be accomplished without them.

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9 WEIGHING CERTIFICATE

The weighing result shall be presented on a weighing certificate. The weighing CONTRACTOR, VENDOR and PURCHASER shall sign the certificate.

The weighing certificate shall, as a minimum, contain the following information:

1. Project identification

2. Time, date and location of weighing

3. Temperature, wind speed and direction

4. Dimensional sketch of load cell positions.

5. Recorded total weight and COG for the weighed assembly.

6. Reference to the global coordinate system for the weighed assembly.

7. Identification of weighing equipment and calibration.

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10 REPORTING

Final certified equipment weights shall be submitted by the VENDOR at the time of shipment of the equipment or earlier, if available.

The results of weighing shall be incorporated on a weighing report, which is to be submitted as supporting documentation with an updated weight data sheet and copies of the weighing equipment calibration certificates. Any items excluded from the weighing are to be specifically identified with an associated weight estimate.

The Equipment Weight and COG Data Sheet (see Appendix 1 Sample Data Sheets) may be used as the primary mechanism for reporting the weighing results with an attachment added for reporting additional weighed weight information. If certified drawings are to be produced, the weighed weight, with any applicable adjustments, shall be shown on the final revision of the certified drawing.

In addition to the information already required on the Equipment Weight and COG Data Sheet, the following information is required.

1. The serial number and description (type and model) of the weighing equipment used.

2. The stated accuracy of the weighing equipment used.

3. The actual reading accuracy to which the weight measurements could be read on the weighing

equipment used.

4. Indication of weighing equipment bias, if existent.

5. The calibration certificates of the weighing equipment, with indication of date, time, and location

of the calibration.

6. A detailed weight and COG estimate of the component to be weighed inclusive of adjustments for construction status, temporary equipment, and other correction factors resulting from the pre- weighing audit.

7. Copies of the audit photographs.

8. Detailed weighing procedure and a listing of any deviations from the approved procedure.

9. The weighed weight.

10. A Weighing Certificate showing all weight readings and the average weighed weight. The weighing certificate should be signed by the person conducting the weighing and witnessed, as appropriate, by a PURCHASER representative, a weight control representative, or regulatory official.

11. As appropriate, weather condition report, including wind speed and ambient temperature.

12. The position of load points related to the component coordinate system and the underside levels

if COG confirmation is an objective.

13. The load cell primary output and any other read-out from the measuring devices shall be

appended to the Weighing Report.

14. Weighing results with calculation of COG, etc. Weight and COG units shall be clearly indicated. If tons are used, the type of tons (long, short, or metric) should be clearly specified. Weight shall be understood to be basic weight, excluding any allowances intended to represent any uncertainties associated with equipment accuracy.

15. Detailed list of temporary items (weight and COG).

16. Detailed list of non-installed items (weight and COG).

17. Detailed list of items in temporary positions (weight and COG).

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18. A reconciliation summary that reconciles the estimated weight (with adjustments to account for the weighing condition) with the indicated weighed weight and present the deviation as a percent of weighed weight.

Sample Weighing Procedures and Record Sheets for both crane lifts and jack lifts are provided in Figure 11.2 and Figure 11.3. They may be used for recording the weighing data.

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11 APPENDICES

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11.1 Appendix 1 Sample Data Sheets

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Figure 11.1 Sample of Equipment Weight and COG Data Sheet

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Figure 11.2 Sample of Weighing Procedure and Record Sheet – Crane Lift

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Figure 11.3 Sample of Weighing Procedure and Record Sheet – Jack Lift

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Project: Q-21699 - Saipem COMP2 Folder: Weight Control