JIS G3454 STPG370 Carbon Steel Seamless Pipes
JIS G3454 STPG370 Carbon Steel Pipes used for pressure service at an approximate maximum temperature of 350℃.
Description
JIS G3454 STPG370 Seamless Carbon Steel Pipes for Pressure Service
Standard:JIS G3454
JIS G3454 STPG370 Carbon Steel Pipes used for pressure service at an approximate maximum temperature of 350℃.
JIS G3454 STPG370 Carbon Steel Pipes Quick Details
Type：Seamless Steel Pipe.
Material：STPG 370 , STPG 38
Outside Diameter：34mm-219mm
Wall thickness：3.4mm——20mm
Length：6M or specified length as required.
Ends：Plain End、Beveled End、Treaded
Additional Info
Surface：Tubes will be varnished (Outside only) to prevent rust.
Marking：Standard + Steel Grade + Size + Heat No + Lot No
Package：According To Per Customers’ Require
Delivery time：Tubes will be completed within 30 days, and urgent delivery time can be discussed.
Method of Manufacture.
The pipe shall be manufactured by either the seamless of the electric resistance welding process.
The pipe shall stay as manufactured. However, the cold—finished steel pipe shall be annealed after manufacture.
Dimensional Tolerances
| Division | Tolerances on outside diameter | Tolerances on wall thickness |
| Hot-finished seamless steel pipe | 40 A or under 【0.5mm | Under 4mm
+0.6mm
-0.5mm
4mm or over
+15%
-12.5%
|
| 50A or over up to and incl. 125 A 【1% | ||
| 150A 【1.6mm | ||
|
200A or over 【0.8%
For the pipe of nominal size 350 A or over, the tolerances on outside diameter may be determined by the measurement of the length of circumference. In this case, the tolerances shall be 【0.5%.
|
||
|
Cold-finished seamless steel pipe and electric resistance welded steel pipe
|
25 A or under 【0.3mm |
Under 3mm
【0.3mm
3mm or over
【10%
|
Chemical Composition
| Letter symbol of grade | Chemical Composition % | ||||
| C | Si | Mn | P | S | |
| STPG370 | 0.25 max. | 0.35 max. | 0.30 ~0.90 | 0.040 max. | 0.040 max. |
Mechanical Properties
| Letter symbol of grade | Mechanical Properties | |||||
| Tensile strength | Yield strength | Elongation % | ||||
| kgf/m㎡ {N/ m㎡} | kgf/m㎡ {N/ m㎡} | No.11 and No.12 test pieces | No. 5 test pieces | No. 4 test piece | ||
| Longitudinal | Transverse | Longitudinal | Transverse | |||
| STPG370 | 38 {373}min | 22{216} min | 30 min | 25 min | 23 min | 28 min |
Appearance
The IS G3454 STPG370 Carbon Steel Pipes shall be practically straight, and its both ends shall be at a right angle to its axis.
The inside and outside surfaces of the IS G3454 STPG370 Carbon Steel Pipes shall be well-finished and free form defects that are detrimental to practical use.