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BASIC DESIGN OF
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JZ25-1 OFFSHORE OIL FIELD DEVELOPMENT
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JOB NO. 2008BD－003
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MACHINERY
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CNOOC RC APPROVED
SIGNATORY
SIGNATURE
DATE
REV’W
EXAM.
APPR.
1 OF 20
ISSUED FOR APPROVAL
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REV
DATE
DESCRIPTION
BY.
CH’K
REV’W EXAM. APPR
CLIENT
CNOOC Ltd.
SPECIFICATION
DESIGN
FOR
CERTIFICATE No.
CNOOC RC
010048-sj
WELDED STEEL
STORAGE TANK
DOCUMENT NO.
REV.
JZ25-1-SPC-GEN-MA-0004
0
BASIC DESIGN OF
JZ25-1 OFFSHORE OIL FIELD DEVELOPMENT
JZ25-1-SPC-GEN-MA-0004
REV. 0
CONTENTS
1.0
1.1
1.2
1.3
INTRODUCTION
General
Vendor Responsibility
Subcontractors
2.0
2.1
2.2
2.3
2.4
2.5
CODES, STANDARDS AND REFERENCS
General
Codes, Standards And Regulations
Reference Project Specifications
Order Of Precedence
Certifying Agency
3.0
3.1
3.2
3.3
3.4
SCOPE OF SUPPLY
General
Scope Of Supply
Materials, Workmanship And Suitability
Warranty
4.0
4.1
4.2
4.3
ENVIRONMENTAL DESIGN CRITERIA
General
Area Classification
Site Environmental Data
5.0
5.1
5.2
5.3
5.4
5.5
5.6
5.7
5.8
5.9
5.10
DESIGN REQUIREMENTS
General
Corrosion Allowance
Design Loading
Manholes, Nozzles And Inspection Openings
Internal Details
External Details
Earthing Boss
Drawings And Calculations
Insulation
Cathodic Protection
6.0
6.1
6.2
6.3
MATERIALS
General
Gaskets
Bolting
7.0
FABRICATION
WELDED STEEL STORAGE TANK
Page 2 of 20
BASIC DESIGN OF
JZ25-1 OFFSHORE OIL FIELD DEVELOPMENT
7.1
7.2
General
Welding
8.0
8.1
8.2
8.3
8.4
8.5
INSPECTION, TESTING AND CERTIFICATION
General
Inspection Of Welds
Testing
Nameplate
Certification Documents
9.0
9.1
9.2
PAINTING AND PREPARATION FOR SHIPMENT
Painting And Protective Coating
Preparation For Shipment
APPENDIX A
APPENDIX B
JZ25-1-SPC-GEN-MA-0004
REV. 0
TYPICAL EARTHING BOSS
NOZZLE PROJECT
WELDED STEEL STORAGE TANK
Page 3 of 20
BASIC DESIGN OF
JZ25-1 OFFSHORE OIL FIELD DEVELOPMENT
1.0
INTRODUCTION
1.1
GENERAL
JZ25-1-SPC-GEN-MA-0004
REV. 0
This specification covers the minimum requirements for the design, construction,
supply, inspection, and shipment of the welded steel storage tanks to be
installed on the CEP and WHPA offshore platforms of JZ25-1 oil field, located in
Bohai Liaodong Bay, the People’s Republic of China.
Any exception to the requirements of this specification shall be submitted in
writing for resolution by Purchaser.
1.2
VENDOR'S RESPONSIBILITY
The Vendor shall be responsible for the complete design, manufacture, supply,
inspection, testing, preparation for shipment for the welded steel storage tanks
including full compliance with all applicable design codes and standards, not
limited to those listed in Section 2.0 of this specification, and the requirements of
the independent certifying agency.
Items supplied by Vendor as the welded steel storage tanks, but those which are
not required shall be identified in his original bid.
1.3
SUBCONTRACTORS
Written permission by Purchaser shall be obtained before any work is
subcontracted.
2.0
CODES, STANDARDS AND REFERENCS
2.1
GENERAL
The tank(s) requirements shall be limited to those noted in this specification,
except that where the governing laws of the People's Republic of China are more
stringent they shall apply.
The following codes and standard regulations (latest edition if existing) are part
of this specification and shall be complied.
2.2
CODES, STANDARDS AND REGULATIONS

SETC
Safety Rules for Offshore Fixed Platform (State Economic &
Trade Commission. PRC)

API 12D
Specification for Field Welded Tanks for Storage of
Production Liquids

API 12F
Specification for Shop Welded Tanks for Storage of
Production Liquids

API 12R1
Recommended Practice for Setting, Maintenance,
Inspection, Operation and Repair of Tanks in Production
WELDED STEEL STORAGE TANK
Page 4 of 20
BASIC DESIGN OF
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JZ25-1-SPC-GEN-MA-0004
REV. 0
Service.

ANSI B16.5
Pipe Flanges and Flanged Fittings

ANSI B16.21
Non-metallic Flat Gaskets for Pipe Flanges

API 2000
Venting Atmospheric and Low-Pressure Storage Tanks
Non-refrigerated and Refrigerated

ASME IX
Welding and Brazing Qualifications

ASME V
Nondestructive Examination
Following Codes Only for Domestic Products:
2.3

JB/T4735
Steel Welded Atmospheric Pressure Vessels

JB/T4744
Mechanical Property Tests of Product Welded Test
Coupons for Steel Pressure Vessels

JB4730
Nondestructive Examination

GB/T8163
Carbon & Low Alloy Seamless Steel Pipe for Flow Transfer

GB/T14976
Seamless Stainless Steel Pipe for Flow Transfer
REFERENCE PROJECT SPECIFICATIONS
The following is a listing of Project Specifications which shall be adhered to:

JZ25-1-SPC-GEN-MA-0001
Package General

JZ25-1-SPC-GEN-MA-0017
Pressure Vessel and Tank Insulation

JZ25-1-SPC-GEN-PI-0002
General Piping

JZ25-1-SPC-GEN-PI-0003
Piping Material

JZ25-1-SPC-GEN-PI-0005
Hot Insulation Of Piping

JZ25-1-SPC-GEN-EL-0001
General Electrical

JZ25-1-SPC-GEN-EL-0005
Electrical Facilities for Packaged Equipment

JZ25-1-SPC-GEN-IN-0002
General Instrumentation

JZ25-1-SPC-GEN-CC-0001
Protective Coating of Topside
WELDED STEEL STORAGE TANK
Page 5 of 20
BASIC DESIGN OF
JZ25-1 OFFSHORE OIL FIELD DEVELOPMENT
2.4
JZ25-1-SPC-GEN-MA-0004
REV. 0
ORDER OF PRECEDENCE
In case of conflict between this specification, attached reference specifications,
data sheets, and the above codes and standards, the Vendor shall bring the
matter in writing to the Purchaser's attention for resolution and approval.
Unless otherwise decided by the Purchaser, the most stringent requirements
shall apply.
Should any conflict occur as a result of applying data sheets and specifications,
the order of precedence shall be as follows:
•
Data sheets
•
P&ID
•
This specification
•
Other referenced Project Specifications
•
Codes and Standards referred to within this specification and its
attachments
All deviations from the requirements of this specification, its attachments and the
referenced codes and standards shall be stated in the Tender. In the absence of
such a statement, full compliance will be assumed.
Compliance by the Vendor with the provisions of this specification does not
relieve him of his responsibility to furnish equipment and accessories of a proper
mechanical design suited to meet the specified service conditions and/or local
codes governing health and safety.
2.5
CERTIFYING AGENCY
The Certifying Agency will be any one of the certifying agencies approved by the
China Offshore Oil Operation Safety Office (COOOSO), i.e. DnV, CCS, BV, ABS
or Lloyd's. The selection/arrangement of the certifying agency shall be done by
the Vendor at his cost. The design review report and inspection certificate shall
be issued by the certifying agency and are transferred to the Purchaser.
3.0
SCOPE OF SUPPLY
3.1
GENERAL
The Vendor shall be responsible for the design, preparation of drawings and data
sheets, production of materials, manufacture, assembly, all sub-Vendor, testing
WELDED STEEL STORAGE TANK
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BASIC DESIGN OF
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JZ25-1-SPC-GEN-MA-0004
REV. 0
and guarantees, shipment, plus the provision of skilled personnel for the testing
and commissioning of the complete package at the module fabricator's yard
and/or offshore, as required.
Vendor shall commence manufacturing and/or purchasing of required equipment
or material until required Vendor drawings and data sheets have been submitted
to, and approved by the Purchaser.
3.2
SCOPE OF SUPPLY
The scope of supply for the tank(s) shall include, but not be limited to, the
following:

Vessel (with hot insulation).

All internals.

All nozzles with suitable projections as specified on data sheets.

All associated piping, valves, fittings and instruments.

All on-skid wiring.

Supports and skid with lifting lugs.

All necessary interconnecting pipework and valves, terminating at the edge of
the skid. All mating flanges and associated gaskets, bolts, nuts and washers
shall be provided for all Purchasers’ connections.

All necessary instrumentation and controls as defined on the P&ID, data
sheets and requisition documentation.

Spare parts for one year operation.

Ladder, operating/maintenance platform (if necessary).

Other accessories defined on the data sheets.

All documentation requested in this specification and its attachments.

Inspection and testing as called for in this specification and its attachments.
The Vendor shall be responsible for the complete design, engineering,
coordination, testing, delivery and proper functioning of the tank(s), not
withstanding any omissions from this specification.
3.3
MATERIALS, WORKMANSHIP AND SUITABILITY
All materials and parts included in the construction of the specified tanks shall be
WELDED STEEL STORAGE TANK
Page 7 of 20
BASIC DESIGN OF
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JZ25-1-SPC-GEN-MA-0004
REV. 0
new, unused, and of the highest grade, and free from all defects or imperfections
which can affect the performance of the tank(s).
The tank(s) shall be product of a Vendor regularly engaged in the manufacture
and shall be of modern design, of proven performance for similar service in an
offshore environment.
3.4
WARRANTY
Vendor shall guarantee engineering, workmanship and materials of the complete
vessel package to meet the design conditions of this specification and its
attachments for either of the following two conditions, whichever is longer.

Twelve (12) months from actual start-up of the facility.

Eighteen (18) months following shipment to destination.
All components found to be defective due to design, material or workmanship
during the applicable warranty period shall be replaced free of charge to
Purchaser. All experienced personnel, required to replace faulty parts during this
period, will also be provided to Purchaser free of charge.
4.0
ENVIRONMENTAL DESIGN CRITERIA
4.1
GENERAL
Unless otherwise stated on the data sheets, the tank(s) will be located in an open
exposed area.
4.2
AREA CLASSIFICATION
The area classification for the tank(s) and accessories will be noted on the data
sheets.
4.3
SITE ENVIRONMENTAL DATA
The weld steel storage tank shall be designed for installation on an offshore
platform and must be able to operate in a highly saline atmosphere coupled with
high relative humidity conditions.
The site environmental data shall be noted in the data sheets.
5.0
DESIGN REQUIREMENTS
5.1
GENERAL
WELDED STEEL STORAGE TANK
Page 8 of 20
BASIC DESIGN OF
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JZ25-1-SPC-GEN-MA-0004
REV. 0
The design life of tank(s) will be stated in the data sheets. Requests for
substitutes of any kind shall be complete with all pertinent engineering
information for the Purchaser's evaluation of the proposed substitution.
The minimum plate thickness, excluding corrosion allowance, shall be 5 mm for
stiffened flat roofs and sidewalls, and 6mm for stiffened bases. For small tanks
refer to the data sheet.
Stiffeners shall be on the outside of the tank unless otherwise stated on the data
sheet.
Deflections of stiffeners shall not exceed 1/300th of the span regardless of
deflective direction.
Deflections of flat plates shall not exceed 1/150th of the shortest width.
The design membrane stress shall not exceed 70% of the specified minimum
yield.
The tank outline drawings submitted to the Vendor are not intended to cover
complete details. The Vendor shall make detailed calculations covering the design
of tanks shown on the Purchaser's tank outline drawings and shall prepare his
own detailed shop drawings. The Vendor shall submit concurrently to the
Purchaser, prints of fabrication drawings, weld procedures and detailed
calculations for approval.
Hold-down bolts to be sized by Vendor.
Design temperature and pressure to be as stated on tank data sheets.
5.2
CORROSION ALLOWANCE
Unless otherwise specified on the data sheet, 3 mm corrosion allowance shall be
applied to the inside surface of all tank shells, roofs, bottoms and heads where
applicable for carbon steel. 3 mm corrosion allowance shall also be applied to all
surfaces of non-removable internals exposed to the process fluid. Removable
internals shall have half the specified corrosion allowance applied to all surfaces
exposed to the process fluid.
5.3
DESIGN LOADING
The tank(s) shall be designed to withstand following maximum loads, unless
otherwise stated on the data sheet:
WELDED STEEL STORAGE TANK
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BASIC DESIGN OF
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JZ25-1-SPC-GEN-MA-0004
REV. 0

Liquid pressure (S.G to be not less than 1.0). +2000 N/m2 acting vertically on
the whole roof of the tank + weight of the structure/contents + full wind
pressure

600 N/m2 external gauge pressure ＋ Full wind pressure

14000 N/m2 internal gauge pressure ＋ Full wind pressure

The loads due to lifting of empty tank

Transport loads

Acceleration forces as defined below + 1/3 wind pressure.
Tanks and their supports shall withstand forces resulting from an acceleration of
+0.28g acting on the tank at any time in any direction unless otherwise stated on
the data sheet.
5.4
MANHOLES, NOZZLES AND INSPECTION OPENINGS
Each tank shall have at least one manhole or handholes for inspection, cleaning,
and maintenance. The minimum size of manholes shall be at least 20 inches and
handholes shall be 8 inches minimum.
Nozzle projection shall be in accordance with data sheets.
All nozzle openings for 3 inches in size and larger shall be reinforced. Nozzle
reinforcement shall be calculated to determine if such reinforcement is required.
Nozzle wall thickness shall be as specified by the applicable design standard.
Nozzle connections 1 inches and larger shall be flanged.
Unless otherwise specified, boltholes on all flanged nozzles shall straddle the
normal centerline of a tank.
Openings for nozzle connections requiring operator attention or periodic
maintenance shall be located for easy accessibility.
Nozzle reinforcing plates shall be provided with a tapped test hole 6 mm NPT.
Unless specified otherwise on the data sheets, the nozzle projections shall comply
with the requirements of Appendix B.
WELDED STEEL STORAGE TANK
Page 10 of 20
BASIC DESIGN OF
JZ25-1 OFFSHORE OIL FIELD DEVELOPMENT
5.5
JZ25-1-SPC-GEN-MA-0004
REV. 0
INTERNAL DETAILS
The tank Vendor shall furnish and install all vortex breakers, piping and all other
internals required by the appropriate drawings.
Flanges on internal piping may be of built-up construction. Light plate flanges may
be used with machined flat face.
Internal piping shall be flanged for ease of removal.
All removable internals shall be fabricated to pass through tank manholes.
Supports and fixed internals welded to shells/heads shall be seal welded to
prevent crevice corrosion. Seal and strength welds shall carry the appropriate
corrosion allowance.
A suitable gradient for the bottom inside of the tank shall be designed to drain the
tank completely.
5.6
EXTERNAL DETAILS
The tank Vendor shall furnish and attach all insulation supports, external pressure
stiffeners, lifting lugs, ladder and platform clips and pipe supports. Unless
otherwise specified, all tanks shall be provided with a minimum of two lifting lugs.
All attachments shall be continuously welded.
5.7
EARTHING BOSS
All tanks shall have two earthing bosses in accordance with the drawing show in
Appendix A.
5.8
DRAWINGS AND CALCULATIONS
Shop details drawings shall be complete with all dimensions, thickness, and
details of construction including all nozzle locations and orientations. All material
thickness shall be shown. All welds shall be detailed or fully described by notes or
weld symbols, and annotated to the relevant weld procedure specification.
The assembly drawings shall contain all pertinent information relating to the
standards, codes and specifications used in the design, fabrication, inspection and
testing of the tank, including the materials used, the total weight of the tank empty,
operating and full of water.
WELDED STEEL STORAGE TANK
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JZ25-1-SPC-GEN-MA-0004
REV. 0
The tank Vendor shall submit detailed calculations establishing the compliance of
the design with the requirement of this specification. All calculation shall be
complete giving all references and showing all working methods.
Review of the drawings by the Purchaser, does not relieve the Vendor of his
responsibility for the correctness of the design to suit the stated conditions.
5.9
INSULATION
Tank insulation if required on the P&ID/Data Sheets shall be in accordance with
the
Specification
for
Pressure
Vessel
and
Tank
Insulation,
JZ25-1-SPC-GEN-MA-0017.
5.10
CATHODIC PROTECTION
Cathodic(al) protection of the internal surfaces of the welded steel storage tank
shall be furnished by the Vender. Galvalum III anodes shall be furnished, sized for
100％ of the bare area for a minimum 25-years life. Anodes shall be placed to
protect all internal surfaces of the welded steel storage tank internals.
6.0
MATERIALS
6.1
GENERAL
Materials shall be as stated on the data sheets. Alternative materials may be used
if it is advantageous with the prior approval of the Purchaser. Proposed
substitutions must be clearly defined.
Unless otherwise stated, the following shall apply:
6.2

All materials shall be subject to acceptance by the Purchaser.

All pipes shall be seamless and materials shall be as specified on the data
sheets.

All materials welded directly to the tanks shall be made of weldable steel of
similar compatible quality as the tank shell and roof.
GASKETS
Gasket material shall be in accordance with the Specification for Piping Material,
WELDED STEEL STORAGE TANK
Page 12 of 20
BASIC DESIGN OF
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JZ25-1-SPC-GEN-MA-0004
REV. 0
JZ25-1-SPC-GEN-PI-0003. Where nozzles are connected to external piping of
valve, gaskets shall be in accordance with the relevant Piping Material class.
6.3
BOLTING
Bolts and nuts shall be furnished by the Vendor for all cover plates, manholes,
blind flanges and bolted attachments. Bolts and nuts shall be new.
All external bolts and nuts shall be protected against atmospheric corrosion.
Flange bolts and other bolts shall be PTFE coated or cadmium plated to ASTM
A-164.
All internal bots and nuts shall be selected in material to anti-corrosion according
to the fluid contacted.
Embitterment should be removed in accordance with ASTM A-143 or B-242
7.0
FABRICATION
7.1
GENERAL
No fabrication may begin until the Vendor has received written approval of proper
material certification, detailed fabrication drawings, calculations, weld procedures,
plus welder performance and weld procedure qualifications from the Purchaser or
the Purchaser's authorized representative.
Shop details shall be complete with all dimensions, thickness and details of
construction including dimensional location of weld seams and nozzles. All welds
and weld preparations shall be detailed and annotated to the relevant weld
procedure specification.
No fabrication shall be sub-contracted without the prior written approval of the
Purchaser.
No holes shall be made in either the bottom or shell plates for the purposes of
erection.
All lugs attached by welding to facilitate erection shall be removed prior to final
inspection and the plate surface crack detected.
7.2
WELDING
7.2.1
GENERAL
WELDED STEEL STORAGE TANK
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BASIC DESIGN OF
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JZ25-1-SPC-GEN-MA-0004
REV. 0
This specification covers the requirements and procedures for welding and does
not relieve the Vendor from his responsibilities and guarantees with respect to
welding results.
The layout of all welded seams shall permit both internal and external inspection.
All butt welds shall be full penetration welds as shown in the applicable code or
specified in this specification. No lap joints are permitted on shells.
Corner welds for tank shall be full penetration and welded from both sides or full
penetration double fillet welds where one plate projects beyond the corner.
Nozzles and couplings shall be welded to tank with full penetration welds.
Backing rings shall not be used on butt welds. Shop fabricated tanks shall have
bottom plates butt-welded throughout.
All welds of lugs, brackets, structural steel, etc., shall be located so as to miss all
tank welds by a minimum distance between the edges of the welds of 100 mm, or
3 times the thickness of the thicker part being welded, whichever is greater.
Where tanks are to be internally lined, weld joints shall be smooth and free from
sharp edges and corners.
No welding shall be performed when the metal temperature is 5 ℃ and below
without the application of preheat.
All fillet welds shall be continuous.
7.2.2
WELDING PROCEDURES AND PROCEDURE QUALIFICATIONS
The Vendor shall submit weld procedures, qualifications and weld details for all
new weld types utilized for the Purchaser’s review and approval prior to
commencing any production welding.
Each procedure shall be qualified in accordance with ASME IX (or JB/T 4735 for
domestic tank) and this specification.
All repairs welding shall be in accordance with procedures previously approved by
the Purchaser. Caulking is not permitted.
7.2.3
WELDING CONSUMABLES AND DEPOSITED METAL PROPERTIES
WELDED STEEL STORAGE TANK
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JZ25-1-SPC-GEN-MA-0004
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The deposited weld metal shall have yield strength of not less than the minimum
specified for the parent material.
All consumables shall be stored and handled in accordance with manufacturer's
recommendations. Any unidentifiable consumable or those showing signs of
damage or deterioration shall be discarded.
Low hydrogen electrodes shall be dried or baked at the temperature level and
times specified by the manufacturer, and shall be used within 8 hours when stored
in quivers. Electrodes stored in quivers, but not used within the specified times,
shall be restored in ovens.
No electrodes shall be left lying about the site or in workshops. Electrodes so left
shall be scrapped.
7.2.4
WELDER PERFORMANCE QUALIFICATION
All welders and welding machine operators shall be qualified in accordance with
ASME IX. These welders and operators shall only be allowed to weld using the
approved welding process and in the position for which they are qualified.
8.0
INSPECTION, TESTING AND CERTIFICATION
8.1
GENERAL
Inspection and testing shall be carried out at the manufacturer works, and shall be
witnessed by the Purchaser and Purchaser's representative if required.
The responsibility for inspection rests with the Vendor；however, the Purchaser
and their authorized representatives reserve the right to inspect at anytime during
fabrication to ensure that materials and workmanship are in accordance with this
specification and the individual data sheets and/or drawings.
The Vendor shall provide a projected shop schedule with appropriate fabrication
stages at the time drawings is submitted for approval, to highlight the inspection
activity schedule.
The inspection of any work by the Purchaser or their authorized representative,
and the release of a tank for shipment, shall in no way relieve the Vendor of any
responsibility for carrying out the provisions of this specification.
The Vendor shall inform the Purchaser at the time of placing the order of any tests
which cannot be adequately performed.
WELDED STEEL STORAGE TANK
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BASIC DESIGN OF
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8.2
JZ25-1-SPC-GEN-MA-0004
REV. 0
INSPECTION OF WELDS
All welds shall be visually inspected after completion.
All tanks and attached welds shall be with 100% visual inspection.
Throat thickness of all fillet welds shall be checked.
Butt welds shall be spot examined by radiography specified on the tank data
sheet.
When spot radiographic examination is required, all junctions of welds and all
repaired areas shall be fully radiographed and in addition at least one radiograph
shall be taken at a location chosen by the Inspector.
Spot examination by Sectioning is prohibited.
Corner joints and butt welds in tank plates shall be 100% inspected by magnetic
particle crack detection test for carbon steel.
Nozzle and reinforcing pad welds shall be subject to 100% magnetic particle
inspection.
For stainless steel, Dye Penetrate method shall be used instead of MPI.
All sealed welds of stiffeners, attachments and internal parts on the tank shell
shall be 100% inspected by MPI.
All inspection shall be conducted and interpreted by qualified persons utilizing
proven techniques and equipment. The inspection results shall be substantiated
by charts, photographs and reports, which shall be submitted to the Purchaser.
The Purchaser shall be notified in advance of all these tests to enable him or his
appointed Agency to witness the tests.
The Purchaser shall have the right to request additional inspections or
examinations by presentation of written notice to the Vendor.
Such additional work shall meet all the requirements of the preceding paragraphs.
8.3
TESTING
8.3.1
GENERAL
WELDED STEEL STORAGE TANK
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The equipment shall be tested as required by the tank data sheet. Prior to final
inspection and hydrostatic test, the inside and outside of the tank shall be cleaned
and free from all slag, loose scale, dirt and weld spatter.
8.3.2
PRESSURE TESTING
All tanks shall be subject to a hydrostatic test. The test pressure shall be defined
on the tank data sheet.
All hydrostatic tests shall be carried out using fresh water, in the presence of an
authorized inspector and subject to his approval. After successful testing, all water
shall be drained and the equipment thoroughly dried.
Tanks shall be properly vented during filling for hydrostatic testing so as to prevent
the formation of air pockets before any test pressure is applied.
Tanks shall be hydrostatical tested whilst being supported as in normal operation.
The test shall be held for a length of time to allow a thorough inspection. The
minimum test period shall be one hour.
Tell tale holes in saddles or nozzle reinforcing pads shall be tested with air at 200
kPa maximum and checked with soapsuds prior to final hydrostatic test.
The test mediums shall be at a temperature between 7 ℃ and 25 ℃ unless
specified in the rules.
Tanks shall be retest if any repairs are found necessary. The retest shall be
performed after completion of repairs and any heat treatment, all subject to the
approval, and in the presence of, the Purchaser's representative.
8.4
NAMEPLATE
A Stainless Steel (Type 316) nameplate shall be provided and be in accordance
with the Project Specification for Package General, JZ25-1-SPC-GEN-MA-0001.
8.5
CERTIFICATION DOCUMENTS
The Vendor shall store in good order all material certificates, fully catalogued and
indexed NDT test records, mechanical test certificates, welding qualification
certificates, heat treatment certificates and hydrostatic test certificates for a
minimum of 5 years after acceptance of the complete and fully certified tank by
the Purchaser.
WELDED STEEL STORAGE TANK
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BASIC DESIGN OF
JZ25-1 OFFSHORE OIL FIELD DEVELOPMENT
9.0
PAINTING AND PREPARATION FOR SHIPMENT
9.1
PAINTING AND PROTECTIVE COATING
JZ25-1-SPC-GEN-MA-0004
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Painting, protective coatings and the procedures used for the preparation of
surfaces shall be as specified in the Project Specification for Protective Coating of
Topside, JZ25-1-SPC-GEN-CC-0001.
Where painting is specified, the entire tank shall be painted. Nozzles shall be
painted on the flange edges, inside bolt holes, and up to the gasket surface.
Fireproofed or insulated surfaces shall be shot blasted and given one coat of
primer only.
9.2
PREPARATION FOR SHIPMENT
Preparation for shipping and storage shall be in accordance with the requirements
of the Project Specification for Package General, JZ25-1-SPC-GEN-MA-0001,
and with the following additional requirements.
After the final hydrostatic test, the tank shall be dried and cleaned thoroughly.
All machined surfaces and threaded connections shall be protected by coating
with rust preventative.
Flanged openings shall be protected with steel plate covers attached by proper
bolting or strapping and sealed with a plastic compound.
Screwed connections shall be protected with threaded forged steel plugs.
The Vendor shall be responsible for loading and anchoring tanks to prevent any
damage during shipment.
When shipped loose, all instruments, valves, parts, etc., of a tank shall be tagged
with the item number and purchase order number to facilitate installation in the
field. Tags and wire shall be stainless steel.
Vendor shall state in the proposal his recommendations for long term storage (up
to 12 months) for both indoor and open-air storage in a marine environment.
WELDED STEEL STORAGE TANK
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BASIC DESIGN OF
JZ25-1 OFFSHORE OIL FIELD DEVELOPMENT
JZ25-1-SPC-GEN-MA-0004
REV. 0
APPENDIX A TYPICAL EARTHING BOSS
WELDED STEEL STORAGE TANK
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BASIC DESIGN OF
JZ25-1 OFFSHORE OIL FIELD DEVELOPMENT
JZ25-1-SPC-GEN-MA-0004
REV. 0
APPENDIX B NOZZLE PROJECT
WELDED STEEL STORAGE TANK
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