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

1, Steel No.

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