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GB/T 5310 Seamless steel tubes and pipes for high pressure boiler |
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Standard: GB/T 5310
Equivalent Standards: EN 10216-2, ASTM A369, BS 3059 Part I, NF A 49-213, DIN 17175, JIS G3458, JIS G3461, JIS G3462, ASTM A213, ASTM A335, EN 10216-5, JIS G3463, JIS G3459, ASTM A210, ASTM A106, ASTM A178 |
Material: 20MnG
Equivalent Materials: SA106B, SA178C, SA210A1, P265GH, STP410, C-Mn-Si |
Chemistry Composition |
C, % |
Si, % |
Mn, % |
P, % |
S, % |
Cu, % |
Cr, % |
Ni, % |
Mo, % |
V, % |
0.17-0.23 |
0.17-0.37 |
0.70-1.00 |
0.025 max |
0.015 max |
0.20 max |
0.25 max |
0.25 max |
0.15 max |
0.08 max |
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Mechanical Properties |
Tensile Strength , MPa |
Yield Strength, MPa |
Elongation, % |
Impact (KV2)/J |
Hardness |
415-560 |
240 min |
22 min |
40 (OD≥76mm & WT≥14mm) |
HBW 125-170 |
HV 125-170 |
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Outside Diameter & Tolerance |
Hot Rolled |
Outside Diameter, mm |
Tolerance |
Ordinary |
Advanced |
OD<57 |
±0.40mm |
±0.30mm |
57≤OD≤325, WT≤35 |
±0.75% |
±0.50% |
57≤OD≤325, WT>35 |
±1% |
±0.75% |
325<OD≤600 |
+1% or +5mm |
- |
OD>600 |
+1% or +7mm |
- |
Cold Drawn |
Outside Diameter, mm |
Tolerance |
OD≤25.4 |
±0.15mm |
- |
25.4<OD≤40 |
±0.20mm |
- |
40<OD≤50 |
±0.25mm |
- |
50<OD≤60 |
±0.30mm |
- |
OD>60 |
±0.50% |
- |
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Wall thickness & Tolerance |
Hot Rolled |
Wall Thickness, mm |
Tolerance |
Ordinary |
Advanced |
WT≤4.0 |
±0.45mm |
±0.35mm |
4<OD≤20 |
+12.5%/-10% |
±10% |
WT>20, OD<219 |
±10% |
±7.5% |
WT>20, OD≥219 |
+12.5%/-10% |
±10% |
Cold Drawn |
Wall Thickness, mm |
Tolerance |
Ordinary |
Advanced |
WT≤3.0 |
±0.30mm |
±0.20mm |
WT>3 |
±10% |
±7.5% |
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GB/T 5310 specifies the classification, code, size, shape, weight, technical requirements, samples, test methods, inspection rules, packaging, marking and quality certificate of seamless steel pipes for high pressure boilers. GB/T 5310 is applicable to the manufacture of seamless steel pipes for steam boilers and pipelines with high pressure and above.
GB/T 5310规定了高压锅炉用无缝钢管的分类、代号、尺寸、外形、重量、技术要求、试样、试验方法、检验规则、包装、标志和质量证明书。GB/T 5310适用于制造高压及其以上压力的蒸汽锅炉、管道用无缝钢管。 |
Manufacture: tubes to GB/T 5310 shall be manufactured by hot rolled or cold drawn.
Heat Treatment: the tubes shall be produced by heat treated as normalizing.
Inspection & Test: chemistry composition analysis, tension test, flattening test or bending test, flaring test, hardness test, impact test, grain size grade, decarburized layer of both inside & outside, macroscopic examination, non-metallic inclusions, microstructure, NDT, surface inspection and dimension check. |
Length: 4000mm; 6000mm; 9000mm; 12000mm; and so on.
Max developed length: 30 meters, also U bending, finning, studded process can be provided.
Option: shot blasting on the outside surface to remove mill scale, make the surface matte colour; surface polishing as preparation work done for further processing, for instance finning. |
Keyword: GB/T 5310, High Pressure Steel Pipe, Boiler Steel Pipe, Steam Boiler Pipe, Pipeline, Piping |
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