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Petroleum cracking pipe
● Standard Standard GB9948-2013 main steel grades: 10, 20, 12CrMo, 15CrMo ● Uses Used in the manufacture of furnace tubes, heat exchanger tubes and pipes in petroleum refineries ● Dimensional deviation Deviation
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Classification:
- Product Description
-
- Commodity name: Petroleum cracking pipe
● Standard Standard GB9948-2013 main steel grades: 10, 20, 12CrMo, 15CrMo ● Uses Used in the manufacture of furnace tubes, heat exchanger tubes and pipes in petroleum refineries ● Dimensional deviation Deviation
● Standard Standard
GB9948-2013 main steel grades: 10, 20, 12CrMo, 15CrMo
● Uses
Used in the manufacture of furnace tubes, heat exchanger tubes and pipes in petroleum refineries
● Dimensional deviation Deviation
Type of steel pipe
Steel pipe size
Allowable deviation
hot rolled tube
Outer diameter
≤ 159
± 1.00%
> 159
± 1.25%
Wall thickness
≤ 20
± 12.5%
> 20
± 10.0%
cold drawn pipe
Outer diameter
≤ 30
± 0.20
30~50
± 0.30
> 50
± 0.8%
Wall thickness
≤ 3
+ 12%－ 10%
> 3
± 10%
●Chemical composition and mechanical properties
Standard
Steel Grade
Chemical Composition (%)
C
Si
Mn
Ni
Cr
Mo
P.S
GB9948
10
0.17 ～ 0.14
0.17 ～ 0.37
0.35 ～ 0.65
≤ 0.25
≤ 0.15
/
≤ 0.035
20
0.17 ～ 0.24
0.17 ～ 0.37
0.35 ～ 0.65
≤ 0.25
≤ 0.25
/
≤ 0.035
12CrMo
0.08 ～ 0.15
0.17 ～ 0.37
0.40 ～ 0.70
≤ 0.30
0.40 ～ 0.70
0.40 ～ 0.55
≤ 0.035
15CrMo
0.12 ～ 0.18
0.17 ～ 0.37
0.40～ 0.70
≤ 0.30
0.80 ～ 1.10
0.40 ～ 0.55
≤ 0.035
Mechanical properties
Tensile strength (MPa)
Yield strength (MPa)
Elongation (%)
10
330 ～ 490
≥ 205
≥ 24
20
410 ～ 550
≥ 245
≥ 21
12CrMo
410 ～ 560
≥ 205
≥ 21
15CrMo
440 ～ 640
≥ 235
≥ 21
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