Under the license from American Petroleum Institute (API), Line pipes for oil and gas transmission are produced strictly according to the requirements of API Spec 5L, Q1 and ISO 9001. The Line pipes also correspond to the Grade A – 53B of the ASTM (American Society for Testing and Materials) specification.
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Criteria
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Particulars
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Standards & Pipe/Steel grade
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API Spec 5L PSL 1
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L245 or B
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L290 or X42
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Chemical Composition (%)
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Carbon
Manganese
Sulphur
Phosphorus
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0.26 max.
1.20 max.
0.030 max.
0.030 max.
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0.26 max.
1.30 max.
0.030 max.
0.030 max.
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Tensile Properties
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Yield Strength (min.)
MPa
psi
kgf/mm2
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245
35 500
25
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290
42 100
29.6
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Tensile Strength (min.)
MPa
psi
kgf/mm2
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415
60 200
42.33
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415
60 200
42.33
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Elongation on a test specimen of 2" gauge length and 0.13 sq. in. cross-section, % (min.).
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21
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21
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Note: 1 kgf/mm2 = 9.8 MPa, 1 MPa = 0.102 kgf/mm2, 1 kgf/mm2 = 1422.3 psi
1 MPa = 145.0377 psi, 1 psi = 7.031 x 10-4 kgf/mm2 ,1 psi = 0.07030814 kgf/cm2
