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Seamless pipe 16" SCH80, ASTM A335/ ASME SA-335 Grade P11, supplied to a chemical plant in the UK, CE/PED certified.
The ferritic alloy-steel seamless pipes made of ASTM A335/ ASME SA-335 Grade P11 are widely used in high-temperature service. In particular, ASTM A335 P11 seamless pipes are mainly intended for the cold-reheat piping system of the coal-fired power plant. The pipe may be ordered to NPS, outside diameter, or inside diameter, and shall be furnished with scale-free surface. It has a nominal chemical composition of 1.25Cr-0.5Mo-Si and UNS designation number of K11597 with P number of 4.
MPa [ksi], min.
MPa [ksi], min.
|415 ||205 |
The ASTM A335 Gr. P11 seamless pipe shall be either hot rolled or cold drawn. It may be furnished in full or isothermal annealing condition, or normalized and tempered condition. When normalizing + tempering heat treatment is adopted, the tempering temperature shall be no less than 650°C [1200°F].
For ASTM A335/ ASME SA-335 Grade P11 pipes order to inside diameter, the inside diameter shall not vary more than ±1% from the specified inside diameter. For pipes ordered to NPS [DN] or outside diameter, the permissible variations (tolerances) in outside diameter are presented in the table below.
|NPS>12"||±1% of O.D.|
The length tolerance is usually specified by the purchaser. The lower tolerance for wall thickness is 12.5%. The upper tolerance for wall thickness is 20.0% for 1/8″≤NPS≤2.5″. For NPS > 2.5″, when t/D ≤ 5%, the upper tolerance for wall thickness is 22.5%; when t/D > 5%, the upper tolerance for wall thickness is 15.0%.
PMI chemical analysis, ultrasonic test, hydrostatic test, eddy current test, tension test, flattening test, etching test, bend test.