GB/T 31937 L245J/BJ SAWL Steel Pipe for Pipeline of Coal Slurry, API 5L, L245J/BJ, L290J/X42J, L320J/X46J, L360J/X52J, L390J/X56J, L415J/X60J, L450J/X65J

GB/T 31937 SAWL Steel Pipe for Pipeline of Coal Slurry

Standard: GB/T 31937
Equivalent Standard: API 5L

Material: L245J/BJ
Equivalent Material: 1010, E235, St35.8, St37

Chemistry Composition

C, %	Si, %	Mn, %	Cr, %	Ni, %	S, %	P, %	Cu, %
0.07-0.14	0.17-0.37	0.35-0.65	0.15 max	0.30 max	0.040 max	0.035 max	0.30 max

Mechanical Properties

Tensile Strength, MPa	Yield Strength, MPa	Elongation, %
353 min	216 min	24 min

Outside Diameter & Tolerance

Outside Diameter, mm	Tolerance
32≤OD≤50	±0.5mm
51≤OD≤219	±1%

Wall thickness & Tolerance

Wall Thickness, mm	Tolerance, %
3≤OD≤15	+12.5/-15
16≤OD≤30	±12.5
32≤OD≤45	+10/-12.5

GB/T 31937 specifies the steel grade representation method, order content, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certification of SAWL steel pipe for pipeline of coal slurry. GB/T 31937 is applicable to straight seam submerged arc welded steel pipes for coal slurry transportation projects with wall thickness from 6mm to 40mm.
GB/T 31937规定了煤浆输送工程用直缝埋弧焊接钢管的钢级表示方法、订货内容、尺寸、外形、重量及允许偏差、技术要求、试验方法、检验规则、包装、标志和质量证明书。GB/T 31937适用于6mm~40mm壁厚的煤浆输送工程用直缝埋弧焊接钢管。

Manufacture: the tubes shall be manufactured by cold drawn and hot rolled.
Delivery Condition: heat treated.
Inspection & Test: chemical composition test, elongation test, hardness test, flattening test, bending test, flaring test, NDT, surface inspection and dimension check.

Length: 4000mm; 6000mm; 6500mm; 10000mm; 12010mm; and so on.
Max length: 18000mm

Keyword: GOST 8732-78, Steel Pipe, Hot worked Steel Pipe, Seamless Steel Pipe

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