Carbon Steel Pipes
Alloy Steel Pipes
GB 150.2 12Cr2Mo1
GB 150.2 09MnD
GB 150.2 09MnNiD
GB 150.2 08Cr2AlMo
GB 150.2 09CrCuSb
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GB 150.2 Carbon steel tubes, alloy steel tubes and stainless steel tubes used for pressure vessels Part 2: Materials
Standard: GB 150.2
Material: 09MnNiD
Chemistry Composition
C, %
Si, %
Mn, %
P, %
S, %
Ni, %
Nb, %
Als, %
0.12 max
0.15-0.50
1.20-1.60
0.020 max
0.010 max
0.30-0.80
0.04 max
0.015 min
Mechanical Properties
Tensile Strength , MPa
Yield Strength, MPa
Elongation, %
Impact (KV2)/J at -70℃
440-580
280 min
24 min
47 (OD≥76mm & WT≥14mm)
Outside Diameter & Tolerance
Hot Rolled
Outside Diameter, mm
Tolerance
Ordinary
Advanced
OD≤54
±0.50mm
±0.30mm
54<OD≤325
±1%
±0.75%
OD>325
±1%
-
Cold Drawn
Outside Diameter, mm
Tolerance
Ordinary
Advanced
OD≤25.4
±0.15mm
-
25.4<OD≤40
±0.20mm
-
40<OD≤50
±0.25mm
-
50<OD≤60
±0.30mm
-
OD>60
±0.75%
±0.50%
Wall thickness & Tolerance
Hot Rolled
Wall Thickness, mm
Tolerance
Ordinary
Advanced
WT≤20
+15%/-10%
±10%
WT>20
+12.5%/-10%
±10%
Cold Drawn
Wall Thickness, mm
Tolerance
Ordinary
Advanced
WT≤3
±0.30mm
±0.20mm
WT>3
±10%
±7.5%
GB 150.2 is applicable to steel tubes for pressure vessels with design temperature of -253℃ to 800℃ and design pressure of not more than 35MPa.
Manufacture: tubes to GB 150.2 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 (alloy & stainless), impact test, macroscopic examination, non-metallic inclusions, microstructure, intergranular corrosion test (stainless), 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 150.2, Air preheater Steel Tubes, Heat Exchanger Steel Tubes, Furnace Tubes
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