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JIS/G3454 STPG370 Carbon Steel Pipes for Pressure Service
| Model No. : | JIS G3454 Stpg370 Stpg410 |
|---|---|
| standard : | Gb,Jis,Astm |
Product description
JIS G3454 Carbon Steel Pipe
JIS G3454 Carbon steel pipes for pressure service at an approximate maximum temperature of 350℃.
Chemical Compositions(%) of JIS G3454
|
Standard |
Grade |
C |
Si |
Mn |
P |
S |
|
JIS G3454 |
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 |
Mechanical properties
|
Standard |
Grade |
Yield Strength (Mpa) |
Tensile Strength (Mpa) |
Elongation (%) |
|
JIS G3454 |
STPG370 |
≥216 |
≥370 |
≥30 |
|
STPG410 |
≥245 |
≥410 |
≥25 |
The tubes shall be manufactured by seamless process, electric resistance welding process, or butt welding process, and those of other grades shall be manufactured by seamless process or electric resistance welding process. The tube shall be as manufactured or as cold-finished condition, or they shall be subjected to appropriate heat treatment.
The tubes shall be practically straight. and the two ends shall be at right angles to the axis of the tube. The tubes shall be free from defects detrimental to practical use.
Method of Sampling Specimen
|
Division |
Method of sampling specimen and number of test pieces |
|
Nominal diameter, 50 A or under |
On shall be taken form each 1000 pipes of its fraction of the same dimensions (2) |
|
Nominal diameter, 65 A or over up to and incl. 125 A |
one shall be taken from each 500 pipes or its fraction of the same dimensions |
|
Nominal diameter, 150 A or over up to and incl. 300 A |
One shall be taken form each 250 pipes of its fraction of the same dimensions |
|
Nominal diameter, 350 A or over |
One shall be taken form each 150 pipes or its fraction of the same dimensions |
Note (2) The expression "same dimensions" means the same outside diameter as well as the same wall thickness.
JIS G3454 Carbon Steel Pipes Appearance
The pipe shall be practically straight, and its both ends shall be at a right angle to its axis. The inside and outside surfaces of the pipe shall be well-finished and free form defects that are detrimental to practical use.JIS G3454 Carbon Steel Pipes Nondestructive Test
The pipe shall be tested in accordance with 9.5 and the resulting hydrostatic characteristic or nondestructive characteristic shall conform to either of the following two. The preference for which of them shall be left to the specification by the purchaser or to the discretion of the manufacturer.JIS G3454 Carbon Steel Pipes Marking
Each pipe having passed the inspection shall be marked with the following items. However, the smaller pipes or other pipes specified by the purchaser may be bundled together and marked for each bundle by a suitable means. In both cases, the order of arranging the marked items is not specified.JIS G3454 Carbon Steel Pipes Test and Inspection
DivisionChemical analysis
Tensile Test
Flattening Test
Bending Test
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