ASTM A106 Seamless Carbon Steel Pipe
Features
- Seamless construction without a longitudinal weld seam for consistent pipe integrity
- Three grades available to meet different strength and fabrication requirements
- Designed for high temperature service in industrial piping systems
- Hot finished and cold drawn manufacturing options according to size and order requirements
- Suitable for welding, bending, and flanging with appropriate fabrication procedures
- Hydrostatic testing or permitted nondestructive examination according to applicable requirements
- Multiple pipe schedules, end preparations, and protective finishes for project specifications
Specifications
| Parameter | Specification |
|---|---|
| Standard | ASTM A106/A106M, seamless carbon steel pipe for high temperature service |
| Grades | Grade A, Grade B, Grade C |
| Manufacturing Process | Seamless hot finished or cold drawn, subject to size and manufacturing requirements |
| Outside Diameter | NPS 1/8 to NPS 48, subject to applicable dimensional requirements and manufacturing capability |
| Wall Thickness | Specified nominal wall thickness, commonly based on ASME B36.10M pipe schedules |
| Length | Specified or random lengths according to the applicable standard and purchase order |
| Ends | Plain ends by default unless otherwise specified; bevelled ends available when ordered |
| Surface Finish | As manufactured, hot finished, or cold drawn, with protective coating where specified |
| Testing | Tensile testing, applicable flattening or bending tests, and hydrostatic testing or permitted nondestructive examination according to the specification |
| Typical Use | High temperature process piping, power generation, refineries, petrochemical plants, and industrial fluid systems |
Chemical Composition and Mechanical Properties
| Element | Grade B Requirement (%) |
|---|---|
| Carbon (C) | 0.30 maximum |
| Manganese (Mn) | 0.29 to 1.06 |
| Phosphorus (P) | 0.035 maximum |
| Sulfur (S) | 0.035 maximum |
| Silicon (Si) | 0.10 minimum |
| Chromium (Cr) | 0.40 maximum |
| Copper (Cu) | 0.40 maximum |
| Molybdenum (Mo) | 0.15 maximum |
| Nickel (Ni) | 0.40 maximum |
| Vanadium (V) | 0.08 maximum |
| Property | Grade A | Grade B | Grade C |
|---|---|---|---|
| Minimum Tensile Strength | 330 MPa | 415 MPa | 485 MPa |
| Minimum Yield Strength | 205 MPa | 240 MPa | 275 MPa |
Size Chart
| Nominal Pipe Size (NPS) | Nominal Diameter (DN) | Outside Diameter (mm) | Schedule 40 Wall Thickness (mm) |
|---|---|---|---|
| 1/2 | 15 | 21.3 | 2.77 |
| 1 | 25 | 33.4 | 3.38 |
| 2 | 50 | 60.3 | 3.91 |
| 3 | 80 | 88.9 | 5.49 |
| 4 | 100 | 114.3 | 6.02 |
| 6 | 150 | 168.3 | 7.11 |
| 8 | 200 | 219.1 | 8.18 |
| 10 | 250 | 273.1 | 9.27 |
| 12 | 300 | 323.9 | 10.31 |
Use Case
- High temperature steam and condensate piping in power generation facilities
- Refinery process lines carrying hot fluids and hydrocarbons
- Petrochemical plants and chemical processing installations
- Industrial boilers and associated high temperature piping systems, subject to design requirements
- Oil and gas processing facilities
- General industrial piping requiring seamless carbon steel construction