A53 seamless and welded carbon steel pipe

 

a53 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless1

 

 

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