ASTM A106 seamless pressure pipe (also known as ASME SA106 pipe) is commonly used in the construction of oil and gas refineries, power plants, petrochemical plants, boilers, and ships where the piping must transport fluids and gases that exhibit higher temperatures and pressure levels.
• Specification of ASTM A106 Seamless steel pipe :
•Material:ASTMA106 GradeB
• Dimension:ASME B36.10
• End connection: Plain lBevelled lNPT threaded
•Surface: Bare SBlack paint SHot-dip galvanized coating as ASTM A123
• Hydrostatic test: ASTM A530
• NDT testing: ASTM E309 Eddy current examination
ASTM E570 Flux leakage examination ASTM E213 Ultrasonic testing
Chemical Composition(%) of ASTM A106 Seamless steel pipe
| C | Si | Mn | P/S | Cr | Mo | Ni | Cu | V |
| max | min | req | max | max | max | max | max | max |
| 0.30 | 0.10 | 0.29-1.06 | 0.035 | 0.40 | 0.15 | 0.40 | 0.40 | 0.08 |
Mechanical Properties of ASTM A106 Seamless steel pipe
| Tensile Strength | Yield Strength | Elongation |
| min(MPa) | min(MPa) | min(%) |
| 415 | 240 | 30/16.5 |
Process of seamless steel pipes
Killed steel, with primary melting process being open-hearth, basic-oxygen, or electric-furnace, possibly combined with separate degassing or refining.
Steel cast in ingots or strand cast is permissible.
Hot-finished pipe need not be heat treated.
Cold-drawn pipe shall be heat treated after the final cold draw pass.
ASTM A106 / ASME SA106 pipes are seamless carbon steel pipes used for high temperature applications (up to 750 degrees F). These pipes are widely used in the oil & gas, petrochemical, power generation and ship-building industries (examples: refineries, downstream plants, vessels. boilers and towers). A106 pipes are particularly suited whenever the trasported fluid has either high temperature or high pressure (or both combined). These pipes can be flanged, bent and formed.
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