Seamless Steel Pipe for Fluid Transportation
●Standard: GB/T 8163-1999， ISO 559，ASTM A 53，ASTM A106，DIN 1629,JIS G 3458 
● Function:
Transmit ordinary fluid, widely applied for oil and natural gas long-distance transmission as well as other fluids.
● Spec.:
● Tolerance of size:
|
Standard |
Outside diameter tolerance |
Wall thickness tolerance |
||
|
GB8163/T |
+15/-12.5% |
|||
|
±1% |
||||
|
DIN 17172 |
D<50mm |
±0.50mm |
D<130mm |
+12.5/-10% |
|
D≥50mm |
±1% |
D≥130mm |
±12.5% |
|
● Mechanical properties:
|
Standard |
Steel grade |
Tensile strength (MPa) |
Yield strength (MPa) |
Extensibility (%) |
|
|
≤ 16mm |
≥16mm |
||||
|
GB 8163 |
|||||
|
20 |
410-550 |
245 |
235 |
20 |
|
|
Q345 |
490-665 |
325 |
315 |
21 |
|
|
DIN 17172 |
StE210.7 |
320-440 |
210 |
28 |
|
|
StE240.7 |
370-490 |
240 |
26 |
||
|
StE290.7 |
420-540 |
290 |
25 |
||
|
StE320.7 |
460-580 |
320 |
23 |
||
|
StE360.7 |
510-630 |
360 |
22 |
||
