NORTH FIELD EXPANSION (NFXP) PROJECT - OFFSHORE
TOPSIDES AND PIPELINES - EPCI
SPECIFICATION FOR TOPSIDE AND
JACKET STRUCTURAL MATERIAL
Table 10 Yield Type II–Toughness Class CV2X and CV2ZX
Material Specification Requirements:
Description
Requirement
Yield Strength Range
345–482 MPa
Tensile Strength Range
482–620 MPa
Additional Requirements
CVN measured at plate
centreline at mid-thickness per
API SPEC 2W (Ref. [14]) / API
SPEC 2Y (Ref. [15]), applies
to all plate grades only.
Charpy V-Notch Impact
42/35 J at 30 C below LAST.
Prequalification
API RP 2Z (Ref. [10]) shall apply
Carbon Equivalent (CE)
0.43
Pcm
0.23
Maximum Thickness
API SPEC 2Y (Ref. [15]) = 150 mm
API SPEC 2W (Ref. [14]) = 100 mm
BSI BS EN 10225 = 100 mm
ASTM A 131/A 131M = 65 mm
Steel Making
Fully killed and fine prior austenite grained
ASTM 5 or finer
Measured by the McQuaidEhn test as specified in ASTM
E 112 (Ref. [45]) or equivalent
approved by COMPANY.
CV2ZX
Supplemental Requirements SR 1 / S1, SR
4 / S4, SR 5 / S5, SR 3 / S3 and SR 9 /
S11 applies
Supplemental Requirements
shall be in accordance with
Section 8 of this specification.
CV2X
Supplemental Requirements SR 1 / S1, SR
5 / S5, SR 3 / S3 and SR 9 / S11 applies
Supplemental Requirements
shall be in accordance with
Section 8 of this specification.
Formed tubulars, D/t
ratio < 20
Supplemental Requirement SR 6 / S8
apply
Supplemental Requirements
shall be in accordance with
Section 8 of this specification.
General
The standard material specification's (i.e.,
API ASTM, BS, etc.) CVN test
temperature, absorbed energy
requirements, and CE shall be satisfied
even if the requirements of this
specification are more lenient.
Document No. 101-20-ST-SPC-00001 Rev 00
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NORTH FIELD EXPANSION (NFXP) PROJECT - OFFSHORE
TOPSIDES AND PIPELINES - EPCI
SPECIFICATION FOR TOPSIDE AND
JACKET STRUCTURAL MATERIAL
Recommended Material Grades:
Toughness Class
Plate
Pipe
Shapes
CV2X
API 2W Gr 50
API 2Y Gr 50
ASTM A 131 DH/EH36
BS EN 10225-1
S355MLO (S355G7+M,
S355G9+M)
NA
NA
CV2ZX
API 2W Gr 50
API 2Y Gr 50
ASTM A 131 DH/EH36
BS EN 10225-1
S355MLO (S355G7+M,
S355G9+M)
NA
NA
Document No. 101-20-ST-SPC-00001 Rev 00
Page | 40 of 49