Spec. Review ResultSteel Plate SpecificationProject: BKT-1 Well-Head platform Doc No.: PlateSpec - BKT1-001Customer: Vietsopetro Rev. 0 Date: 8th December 2014

ItemDescriptionRolled steel pipe Type ISpec.2WActualRolled steel pipe Type IISpec.APIActual1Plate GradeAPI 2W Gr. 50ZAPI 5L X52M PSL22Steel making- The steel shall be made by the open hearth, BOF or EAF process- The plates shall be produced by TMCP,- De-sulfurising, vacuum degrassing, or electro slag remelt process- Continous casting- BOF or EAF process- Killed, vacuum degassed and made to fine grain practice (grain size ASTM 8 or finer in accordance with ASTM E112).- Slab for plate rolling should be produced by the continous casting process.grain size ASTM 8: khng yu cugrain size ASTM 8: khng yu cuKhng thc hin3Delivery ConditionThermo-Mechanical Rolling (TMR)Thermomechanical rolled or thermomechanical formed4Quantity & Dimension (WxTxL) (mm)- Quantity: See attachment "Platelist-BKT1-01"- All dimensions and tolerances of the steel plates: + Width: 0/ +10 mm + Wall thickness: 0/ +0.3mm + Length: 0/ +30 mm + Others shall be in accordance with A6/ A6M.- Quantity: See attachment "Platelist-BKT1-01"- All dimensions and tolerances of the steel plates: + Width: 0/ +10 mm + Wall thickness: 0/ +0.3mm + Length: 0/ +30 mm + Others shall be in accordance with A6/ A6M.5Chemical CompositionElement,Mass fraction*Acceptance standards: Chemical compositions as below*Frequency: Ladle and production analysis (one per heat)*Acceptance standards: Chemical compositions as below*Frequency: Ladle and production analysis (one per heat)CMax 0.16%Max 0.18%Si0.05 - 0.50%0.05 - 0.45%Mn1.15 - 1.5%0.9-1.5%1.15-1.6%1.54, 1.511.15 - 1.4%1.15-1.6%Max. 1.4%1.48, 1.49, 1.45, 1.46, PMax 0.025%Max 0.025%SMax 0.006% (as Supplementary Requirements S5 - LS)Max 0.006% (as Supplementary Requirements S5 - LS)CuMax 0.35%Max 0.35%NiMax 0.75%Max 0.30%CrMax 0.25%Max 0.25%MoMax 0.08%Max 0.08%Ti0.003 - 0.02%0.003 - 0.02%Nb (Cb)Max 0.03%0.03%NMax 0.012%0.012%Al0.015 - 0.055%, Al:N 2:10.015 - 0.055%BMax 0.0005%Max 0.0005%ZrMax 0.0005%Max 0.0005%Theo khch hngKhng thc hinMax 0.0005%Max 0.0005%Theo khch hngKhng thc hinCeMax 0.0005%Max 0.0005%Max 0.0005%Max 0.0005%VMax 0.0005%Max 0.0005%Ln hn 0.001%Max 0.005%Max 0.0005%Ln hn 0.001%OtherOther rare earth metals shall not be exceed 0.0005%Max 0.0005%Khng thc hinOther rare earth metals shall not be exceed 0.0005%Max 0.0005%Khng thc hinNb+V+TiMax 0.15%Max 0.15%CEIIWMax 0.39%Max 0.39%CEPCMMax 0.22%Max 0.22%6NDEVisual testing- Surface condition: according to ASTM A6/A6M- Surface rusting: according to ASTM D610-95, rust grade 7 (ref Table 1, D710-95)- Frequency: each plate- Surface condition: according to ASTM A6 /A6M- Surface rusting: according to ASTM D610-95, rust grade 7 (ref Table 1, D710-95)- Frequency: each plateUT- According to API 2W, S1 or ASTM A578/A567M- Frequency: each plate.- Acceptance standards: + Level A according to ASTM 578/578M- UT technicians: CSWIP UT qualification or equivelent- According to API 2W, S1 or ASTM A578/A567M- Frequency: each plate.- Acceptance standards: + Level A according to ASTM 578/578M- UT technicians: CSWIP UT qualification or equivelent7Mechanical propertiesTensile test- According to API 2W, S3- Position: Two tension test shall be taken from each plate-as-rolled by the TMCP process (parent plate). The test specimens shall be taken from a conner of the plate at both ends.- Frequency: once/ 50 pipes (but min. 1 test/ heat or any diameter or thickness variation within a single heat)- Acceptance standard: + YS: 345 - 517 Mpa, + TS: Min 483 MPa. + Elongation: min 23% in 200 mm gauge length.- According to API 2W, S3- Position: Two tension test shall be taken from each plate-as-rolled by the TMCP process (parent plate). The test specimens shall be taken from a conner of the plate at both ends.- Frequency: once/ 50 pipes (but min. 1 test/ heat or any diameter or thickness variation within a single heat)- Acceptance standard: + Yield Strength: 360 - 530 MPa, + Tensile strength: 460 - 760 MPa, + Ratio: Max 0.93 % + Elongation: Min 27%Through-thickness testing (Z-Direction)- According to API 2W, S4Addition of acceptance standard: ultimate tensile value in the through-thickness direction shall be at least 90% of the minimum specified for the base steel.

Low sufur steel for improved through-thickness properties- According to API 2W, S5- According to API 2W, S58Mechanical properties(cont.)Strain-aging testing- According to API 2W , S8- Location of specimens: test coupon representing the thinnest and thickness plate of each heat,- Uniformly Strained: 5%- Aged at 250 degree C/hour- Number of tests: 3 transverse specimens- Testing: according to ASTM A370- Specimens size: according to API 2W, Table 4- Acceptance standards: + Min. Av. Energy: 50 J + Min Single value: 40 J + Test temp.: - 400CTheo 2W + Test temp.: - 40C + Test temp.: - 20C Charpy V-notch Impact Test- Numbers, orientation, location of test specimens, test method shall accordance to Section 7 Notch Toughness Requirements, API specification 2W.- Frequency: each plate.- Test temp.: - 40 C- Acceptance standards: + Min. Av. Energy: 50 J + Min Single value: 40 JTheo 2W + Test temp.: - 40C + Test temp.: - 20C- Test requirement in accordance with API 5L 44th edition- Frequency: once/50 pipes (but min. 1 test/ heat)- Number, orientation of test: one set (3 transverse specimens)- Specimen size: full-size- Temp: -10C- Acceptance standards: + Min average absorbed energy (J): 41 + Min invididual absorbed energy (J): 34 + Shear area: Min 85% (each test) + Shear area: Min 85% (each test): khng yu cuKhng yu cuKhng thc hin9MarkingStenciled paint- According to API 2W, Section 8.- Details: Stenciling with contents as follows:API Monogram, Lisence No./ Steel grade/ Plate No./ Heat No./ Dimension (WxTxL)/ Manufacturer's name or mark/ Origin.Addition: marking content shall be in accordance with API 2W, section 5.5.1, S4 and S5- Location: + At one end of the plate not less than 300 mm, from any edge + Plate No. and Heat No. shall be marked on the plate edge surface- Details:API Monogram, Lisence No./ API 5L X52M PSL2/ Plate no./ Heat no./ Dimension (WxTxL)/ Manufacturer's name or mark/ Origin- Location: + Plate No. and Heat No. shall be marked on the plate edge surface10Other RequirementHeat No.Each kind of plate shall have the same Heat no.TransportationSteel plate shall be load, transported and unload/stacked at the destination without being excessively stressed, deformed, or otherwise damaged.

DocumentPlate manufacturer shall submitted to PV PIPE documents at quotation stage, as below:- Inspection and Test Plan (ITP),- Manufacturing Procedure Specification,- NDE Procedure, Testing Procedure (for tensile testing, Through-thickness testing, Strain-aging testing, Chemical analysis),- List of NDE technicians and their certificates,-Quality Assuarance Manual and Quality System Manual containing all Quality related procedures-Quality Management System Certification, API Spec. 2W Certification, API Spec. 5L Certification.Inspection- Manufacturing process, quality control process and manufactured products must be inspected and certificated by a reputable third party inspection approved by COMPANY and the cost will belong to CONTRACTOR.- Company shall have the right to check and inspect manufacture of steel plate, and shall have free access at all time to any partof CONTRACTOR's operation that concerns the work product of project on the expense of CONTRACTOR.- CONTRACTOR shall furnish all necessary safety facities, adequate lighting, measurement and test equiqment ect. for safe and throught inspection by COMPANY. Mill Certificates- The steel plates shall be supplied with inspection certificate in accordance with BS EN 10204 Type 3.2- Mill Certificates shall show results of chemical composition, NDE and mechanical properties as above.

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