Seamless steel pipe- pipeline
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Petroleum cracking pipe
Uses: used in petroleum refinery furnace tubes heat exchangers and pipe seamless pipe
Main steel grade grades: 10, 20, 12CrMo, 15CrMo (after consultation, but also supply other special grades of steel)
Chemical composition, mechanical properties:
|
Standard |
Steel grade |
Chemical composition (%) |
||||||
|
C |
Si |
Mn |
Ni |
Cr |
Mo |
PS |
||
|
GB9948 |
10 |
0.17 to 0.14 |
0.17 to 0.37 |
0.35 to 0.65 |
≤ 0.25 |
≤ 0.15 |
/ |
≤ 0.035 |
|
20 |
0.17 to 0.24 |
0.17 to 0.37 |
0.35 to 0.65 |
≤ 0.25 |
≤ 0.25 |
/ |
≤ 0.035 |
|
|
12CrMo |
0.08 ~ 0.15 |
0.17 to 0.37 |
0.40 to 0.70 |
≤ 0.30 |
0.40 to 0.70 |
0.40 to 0.55 |
≤ 0.035 |
|
|
15CrMo |
0.12 ~ 0.18 |
0.17 to 0.37 |
0.40 to 0.70 |
≤ 0.30 |
0.80 to 1.10 |
0.40 to 0.55 |
≤ 0.035 |
|
|
Mechanical behavior |
Tensile strength (MPa) |
Yield strength (MPa) |
Elongation (%) |
|||||
|
10 |
330 to 490 |
≥ 205 |
≥ 24 |
|||||
|
20 |
410 to 550 |
≥ 245 |
≥ 21 |
|||||
|
12CrMo |
410 ~ 560 |
≥ 205 |
≥ 21 |
|||||
|
15CrMo |
440 to 640 |
≥ 235 |
≥ 21 |
|||||
Tolerance:
|
Classification Code |
Manufacturing methods |
Nominal pipe size |
Tolerance |
||
|
Ordinary Level |
Advanced |
||||
|
WH |
Hot-rolled (extrusion) Pipe |
Diameter (D) |
≤ 50 |
+ .50 |
+ .30 |
|
> 50 to 159 |
+ 1% D |
+ 0.75% D |
|||
|
> 159 |
+ 1% D |
+ 0.9% D |
|||
|
Thickness (S) |
> 20 |
+12.5% S -10% S |
+ 10% S |
||
|
Thermal expansion pipe |
Diameter (D) |
Entire |
+ 1% D |
||
|
Thickness (S) |
Entire |
+ 15% S |
|||
|
WC |
Cold drawn (rolled) steel |
Diameter (D) |
14 to 30 |
+ .20 |
+ .30 |
|
> 30 to 50 |
+ .30 |
+ .30 |
|||
|
> 50 |
+ 0.75% D |
+ .30 |
|||
|
Thickness (S) |
> 3.0 |
+12.5% S -10% S |
+ 10% S |
||
|
> 3.0 |
+ 10% S |
+ 7.5% S |
|||
Petroleum cracking pipe
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- Alloy pipe Standard
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- Stainless pipe metrial
- 304, 304L, 304SS pipe
- 310, 310S pipe
- 316, 316L pipe
- Pipe Fitting Metrial
- Carbon steel: A234 WPB pipe
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- Alloy steel: A234 WP5 WP9 WP11 WP22 pipe