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1. Heat Treatment:
1.1 A335 steel pipe of grades shown in Table 1 except P5c, P23,P91, P92, P122, and P911 as provided in 5.3.2, shall be reheated and furnished in the full-annealed, isothermal annealed,or normalized and tempered condition. If furnished in the normalized and tempered condition, the minimum tempering temperature for Grades P5, P5b, P9, P21, and P22 shall be1250°F [675°C], the minimum tempering temperature for Grades P1, P2, P11, P12, and P 15 shall be 1200°F [650°C].
NOTE 3—It is recommended that the temperature for tempering should
be at least 100°F [50°C] above the intended service temperature; consequently,
the purchaser should advise the manufacturer if the service
temperature is to be over 1100°F [600°C].
1.2 Pipe of Grades P1, P2, and P12, either hot finished or cold drawn, may be given a final heat treatment at 1200°F[650°C] to 1300°F [705°C] instead of heat treatments specified
1.3 All pipe of Grades P5c shall be given a final heat treatment in the range from 1325°F [715°C] to 1375°F [745°C].
1.4 Grades P92 and P911 shall be normalized at 1900°F [1040°C] minimum and tempered at 1350°F [730°C] minimum
as a final heat treatment.
1.5 Grade P122 shall be normalized at 1900°F [1040°C]minimum, and tempered at 1350°F [730°C] minimum as a final
1.6 Grade P23 shall be normalized at 1900°F [1040°C]minimum with air cooling or accelerated cooling and temperedat 1350°F [730°C] minimum as a final heat treatment.