JIS G3454 Carbon ERW Steel Pipe pressure service
| Style | Technical | Material | Standard | Grade | Usage |
| Electric Resistance Welded (ERW) steel pipe | High Frequency | Carbon Steel | API 5L PSL1&PSL2 | GR.B,X42,X46,X52,X60,X65,X70,etc | Transportation of oil and gas |
| ASTM A53 | GR.A ,GR.B | For Structure (Piling) | |||
| ASTM A252 | GR.1, GR.2,GR.3 | ||||
| BS EN10210 | S275JRH,S275J0H,S355J0H,S355J2H,etc | ||||
| BS EN10219 | S275JRH,S275J0H,S355J0H,S355J2H,etc | ||||
| JIS G3452 | SGP,etc | Transportation of Low-pressure fluid | |||
| JIS G3454 | STPG370,STPG410,etc | Transportation of High-pressure fluid | |||
| JIS G3456 | STPG370,STPG410,STPG480,etc | high temperature steel pipes |
Pipe ordered under this specification is for pressure service at an approximate maximum temperature of 350℃。
Bare pipe, black coating or hot dip zinc-coated( customized);
In bundles with two cotton slings;
Both ends with end protectors;
Plain end, bevel end(When required by the purchaser and S≤22mm, the pipe end of should be bevelled, degree: 30° (+5°~0°), and the wall thickness of the root is not reduced by <2.4mm.);
Marking.
Pipe End Protection
Marking on Pipes
Marking on Pipes
Grade and Chemical Composition (％)
|
Grade |
C≤ |
Si≤ |
Mn |
P≤ |
S≤ |
|
STPG370 |
0.25 |
0.35 |
0.30~0.90 |
0.040 |
0.040 |
|
STPG410 |
0.30 |
0.35 |
0.30~1.00 |
0.040 |
0.040 |
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Mechanical Properties |
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Grade |
Tensile strength |
Yield strength |
Elongation % |
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N/ m㎡ |
N/ m㎡ |
No.11 or No.12 test pieces |
No. 5 test pieces |
No. 4 test piece |
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Longitudinal |
Transverse |
Longitudinal |
Transverse |
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STPG370 |
370 min |
215 min |
30 min |
25 min |
28 min |
23 min |
|
STPG410 |
410 min |
245 min |
25 min |
20 min |
24 min |
19 min |
Tolerance of OD and W.T
|
Division |
Tolerance on O.D |
Tolerance on W.T |
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Cold finished ERW Steel Pipe |
24A or under |
+/-0.3mm |
Under 3mm
3mm or over |
+/-0.3mm
+/-10% |
|
32A or over |
+/-0.8% |
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| For pipes of nominal size 350A or over,the tolerance on O.D maybe determined by the circumferential length. In this case,the tolerance shall be +/-0.5% | ||||
