ASTM A691 1-1/4CR Pipe Specification
ASTM A691 1-1/4CR pipe is a chrome-molybdenum welded pipe for high temperature and high pressure service. These pipes are made from ASTM A387 Grade 11 chrome-molybdenum steel plate.
Corresponding Materials
ASTM A691 1-1/4CR corresponds to ASTM A335 P11 pipe, sometimes also called ASTM A691 Grade 11 pipe.
Fitting Standard: ASTM A234 WP11
Flange Standard: ASTM A182 F11
Original Steel Plate Standard: ASTM A387 Grade 11 / ASME SA387 Grade 11
ASTM A691 Standard Specification
The ASTM A691 specification covers carbon and alloy steel pipe, electric fusion welded with the addition of filler metal, made from pressure vessel quality plate of multiple analysis and strength grades, suitable for high temperature and high pressure service. Heat treatment may or may not be required to achieve the required mechanical properties or to comply with applicable code requirements. Supplementary requirements are provided when additional testing or inspection is required.
| Type | ASTM A691 1-1/4CR, 2-1/4CR, 5CR, 9CR, 91 LSAW / SAW / EFW Pipe | |
|---|---|---|
| Grades | 1-1/4CR, 2-1/4CR, 5CR, 9CR, 9, P5, P9, P11, P12, P22, P91 | |
| ASTM A691 | Standard Specification for Carbon and Alloy Steel Pipe, Electric-Fusion-Welded for High-Pressure Service at High Temperatures | |
| Class Designation | Class 10, 11, 12, 13, 20, 21, 22, 23, 30, 31, 32, 33, 34, 40, 41, 42, 43, 50, 51, 52, 53, 60, 61, 62, 63, 70, 71, 72, 73.. | |
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