GB/T 30829 JQ245B Shaped and Round Seamless Steel Tubes for Oil Derrick, JQ245B, JQ245C, JQ245D, JQ245E, JQ345B, JQ345C, JQ345D, JQ345E, JQ450C, JQ450D, JQ450E, JQ500C, JQ500D, JQ500E, J20CrMo

GB/T 30829 Shaped and Round Seamless Steel Tubes for Oil Derrick

Standard: GB/T 30829

Material: JQ245B

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 30829 specifies the classification, code, order content, size, shape, weight and allowable deviation, technical requirements, test methods, inspection rules, packaging, marking and quality certificate of shaped and round seamless steel pipes for petroleum derricks. GB/T 30829 is applicable to shaped and round seamless steel pipes for onshore and offshore oil derricks.
GB/T 30829规定了石油井架用异型及圆形无缝钢管的分类、代号、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 30829适用于陆地及海洋石油钻采井架用异型及圆形无缝钢管。

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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