a106 Standard Specification for Seamless Carbon Steel Pipe for High-Temperature Service

 

 

1, Steel No.

C(max)a	Mn	P(max)	S(max)	Si(min)	Cu(max)b	Ni(max)b	Cr(max)b	Mo(max)b	V(max)b
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
Grade C:	0.3	1.2	0.05	0.045	0.4	0.4	0.4	0.15	0.08	0.08

A For each reduction of 0.01 % below the specified carbon maximum, an increase of 0.06 % manganese above the specified maximum will be permitted up to a maximum of 1.35 %.

B These five elements combined shall not exceed 1 %.

2, Diameter & Tolerance:

NPS over in. (mm)Under in. (mm)

1/8 to 11/2, incl 1/64 (0.015) 0.40 1/64 (0.015) 0.40

Over 11/2 to 4, incl 1/32 (0.031) 0.79 1/32 (0.031) 0.79

Over 4 to 8, incl 1/16 (0.062) 1.59 1/32 (0.031) 0.79

Over 8 to 18, incl 3/32 (0.093) 2.38 1/32 (0.031) 0.79

Over 18 to 26, incl 1/8 (0.125) 3.18 1/32 (0.031)0.79

Over 26 to 34, incl 5/32 (0.156) 3.97 1/32 (0.031)0.79

Over 34 to 48, incl 3/16 (0.187) 4.76 1/32 (0.031) 0.79

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)

Grade C
Minimum Yield: 40,000 PSI (275MPa)
Minimum Tensile: 70,000 PSI (485MPa)

4, Wall Thickness & Tolerance:

Wall thickness: Scheduled
Wall Tolerance: +/- 12.5%

 

5,Common Uses:

- Pressure systems

- Mechanical components

- Structural applications

- Spreader bars