ASME SA-376-SA-376M:2021 pdf download

ASME SA-376-SA-376M:2021 pdf download.SPECIFICATION FOR SEAMLESS AUSTENITIC STEEL PIPE FOR HIGH-TEMPERATURE CENTRAL-STATION SERVICE
1. Scope
1.1 This specification covers seamless austenitic steel pipe intended for high-temperature central-station service. Among the grades covered are five H grades and two nitrogen grades (304N and 316N) that are specifically intended for high-temperature service. 1.2 Optional supplementary requirements (S1 through S10) are provided. These supplementary requirements specify additional tests that will be made only when stated in the order, together with the number of such tests required. 1.3 Grades TP321 and TP321H have lower strength requirements for nominal wall thicknesses greater than 3 ⁄ 8 in. [9.5 mm]. 1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each systemmustbeusedindependentlyoftheother. Combining values fromthe two systems may resultin nonconformance with the specification. The inch-pound units shall apply unless the “M” designation ofthis specification is specified in the order. NOTE 1 — The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as “nominal diameter,” “size,” and “nominal size.”
6. Materials and Manufacture
6.1 Manufacture — At the manufacturer’s option, pipe may be either hot finished or cold finished, with a suitable finishing treatment, where necessary. 6.2 Heat Treatment: 6.2.1 All pipe shall be furnished in the heat-treated condition. For H grades, separate solution treatments are required for solution annealing: in process heat treatments are not permitted as a substitute for the separate solution annealing treatments. 6.2.2 As an alternate to final heat treatment in a continuous furnace or batch-type furnace, immediately fol- lowing hot forming while the temperature of the pipes is not less than the specified minimum solution treatment temperature, pipes may be individually quenched in water or rapidly cooled by other means. 6.2.3 Grades TP304, TP304N, TP304LN, TP316, TP316N, TP316LN, TP321, TP347, TP348, 16-8-2H, S31725, and S31726 — Unless otherwise stated in the order, heat treatment shall consist ofheating to a minimum temperature of 1900°F [1040°C] and quenching in water or rapidly cooling by other means. 6.2.3.1 The purchaser may specify controlled structural or special service characteristics which shall be used as a guide for the most suitable heat treatment. If the final heat treatment is at a temperature under 1900°F [1040°C], each pipe shall be stenciled with the final heat treatment temperature in degrees Fahrenheit or Celsius after the suffix “HT.” 6.2.4 Grades TP304H, TP316H, TP321H, TP347H, TP348H, and 16-8-2H — If cold working is involved in processing, the minimum solution-treating temperature for Grades TP321H, TP347H, and TP348H shall be 2000°F [1100°C], for Grades TP304H and TP316H, 1900°F [1040°C], and for Grade 16-8-2H, 1800°F [980°C]. If the material is hot-rolled, the minimum solution-treating tem- peratures for Grades TP321H, TP347H, and TP348H shall be 1925°F [1050°C], for Grades TP304H and TP316H, 1900°F [1040°C], andforGrade 16-8-2H, 1800°F[980°C]. 6.2.5 Grade S34565 — Heat treatment shall consist ofheating to atemperature in the range of2050°F[1120°C] minimum and 2140°F [1170°C] maximum, and quenching in water or rapidly cooling by other means. 6.3 A solution annealing temperature above 1950°F [1065°C] may impair the resistance to intergranular corro- sion after subsequent exposure to sensitizing conditions in TP321, TP321H, TP347, TP347H, TP348, and TP348H. Whenspecifiedbythepurchaser, alowertemperaturestabi- lization or re-solution anneal shall be used subsequent to the initial high temperature solution anneal (see Supple- mentary Requirement S9). 6.4 The grain size ofgrades 304H, 316H, 321H, 347H, and 348H as determined in accordance with Test Methods E 112, shall be No. 7 or coarser.