A691 CMSH80 Alloy Steel Welded Pipe
A691 CMSH80 Alloy Steel Pipe Description
A691 CMSH80 alloy welded pipe in the A691 is the American Society for Testing and Materials (ASTM) standard of a grade, belongs to the high temperature and high pressure with electric welded carbon and alloy steel pipe.
Manufacturing standards and processes
Implementation specifications: ASTM A691 standard, incorporated into ASME SA-691 pressure vessel application specifications;
Forming process: JCOE/UOE cold forming + finishing straightening to ensure geometric accuracy;
Thickness range: Can produce extra-thick pipes with a wall thickness of ≤190mm, breaking the dependence on imports.
A691 CMSH80 EFW Steel Pipe for high pressure specification
| Features | Technical Parameters |
|---|---|
| Alloy system | carbon-manganese-silicon-steel |
| Intensity Level | "H80" suffix indicates minimum yield strength 80 ksi (≥550 MPa) |
| Heat treatment | Normalizing + tempering (910~940℃ temperature control) to eliminate welding stress and optimize high temperature performance |
| Testing requirements | 100% ultrasonic flaw detection + water pressure test to ensure high pressure sealing |
Class designations are as follows

Plate Materials

Heat treatment parameters

applications of A691 CMSH80 alloy steel EFW pipe



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