a53 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless
1, Steel No.
C(max)a | Mn | P(max) | S(max) | Si(min) | Cu(max)a | Ni(max)a | Cr(max)a | Mo(max)a | V(max)a | |
Grade A: | 0.25 | 0.95 | 0.05 | 0.045 | 0.4 | 0.4 | 0.4 | 0.15 | 0.08 | 0.08 |
Grade B: | 0.3 | 1.2 | 0.05 | 0.045 | 0.4 | 0.4 | 0.4 | 0.15 | 0.08 | 0.08 |
B These five elements combined shall not exceed +/-1 %.
2, Diameter & Tolerance:
For pipe = NPS 11⁄2 [DN 40], the outside diameter at any point shall not vary more than 1⁄64 in. [0.4 mm].
For pipe =NPS 2 [DN 50], the outside diameter shall not vary more than +/-1%.
3, Tensile Requirements
Grade A
Minimum Yield: 30,000 PSI (205MPa)
Minimum Tensile: 48,000 PSI (330MPa)
Grade B
Minimum Yield: 35,000 PSI (240MPa)
Minimum Tensile: 60,000 PSI (415MPa)
4, Wall Thickness & Tolerance:
Wall thickness: Scheduled
Wall Tolerance: +/- 12.5%
5, Galvanized
1), Zinc: The zinc used for the coating shall be any grade of zinc conforming to Specification B 6
2), Weight of Coating The weight of zinc coating shall be not less than 1.8 oz/ft2[0.55 kg/m2] as determined from the average results of the two specimens taken for test in the manner prescribed in 19.5 and not less than 1.6 oz/ft2[0.49kg/m2] for either of these specimens. And testing the weight of zinc according to ASTMB90
6, Common Uses:
- Low pressure systems
- Structural applications
- Mechanical components
- Bollards
- Casing
