The ASTM A106 specification covers seamless carbon steel pipes for high pressure and high-temperature applications (up to 750 degrees F). A106 pipes are available in three material grades, A, B, and C.
ASTM A106/SA106 pipes are available in size range from 1/2 to 28 inches, and in pipe schedules from 10 to 160 (as per the ASME B36.10 specification). These pipes are available in single random length (17′ – 24′) and in double random length (36′ – 44′).
CHEMICAL COMPOSITION ASTM A106 – ASME SA106 PIPE
ASTM A106 pipes are manufactured in grades A, B, and C. NPS 1-1/2″ and below are available in the hot finished or by cold-drawn type. Pipes of NPS 2 inch and above are generally are hot rolled. ASTM A106 pipes are produced out of killed steel.
The chemical composition of the three grades of ASTM A106 is shown in the following table:
|ASTM A106 – ASME SA106 seamless carbon steel pipe – chemical composition, %|
|ASTM A106 Grade A||0.25 (1)||0.27-0.93||0.035||0.035||0.10||0.40||0.40||0.15||0.40||0.08|
|ASTM A106 Grade B||0.30 (2)||0.29-1.06||0.035||0.035||0.10||0.40||0.40||0.15||0.40||0.08|
|ASTM A106 Grade C||0.35 (2)||0.29-1.06||0.035||0.035||0.10||0.40||0.40||0.15||0.40||0.08|
TOLERANCE ASTM A106 PIPE
The manufacturing tolerances of ASTM A106 pipes are shown in the table below. To summarize:
- Diameter: see table
- Wall thickness: the minimum WT of the pipe shall not be, at any point, below the nominal pipe size minus 12.5%
- Weight: the allowed tolerance in weight shall be within -3.5% and +10% vs. specification. The weight test can be executed on lots for smaller nominal pipe sized (below 4 inches) but must be executed pipe by pipe for higher diameters (6 inch and above).
|ASTM A106 Grade B||Over||Under|
|1/8 to 1-1/2 [6 to 40], incl||1/64 (0.015)||0.4||1/64 (0.015)||0.4|
|Over 1-1/2 to 4 [40 to 100], incl||1/32 (0.031)||0.8||1/32 (0.031)||0.8|
|Over 4 to 8 [100 to 200], incl||1/16 (0.062)||1.6||1/32 (0.031)||0.8|
|Over 8 to 18 [200 to 450], incl||3/32 (0.093)||2.4||1/32 (0.031)||0.8|
|Over 18 to 26 [450 to 650], incl||1/8 (0.125)||3.2||1/32 (0.031)||0.8|
|Over 26 to 34 [650 to 859], incl||5/32 (0.156)||4.0||1/32 (0.031)||0.8|
|Over 34 to 48 [850 to 1200], incl||3/16 (0.187)||4.8||1/32 (0.031)||0.8|
MECHANICAL PROPERTIES ASTM A106 PIPE
YIELD AND TENSILE STRENGHT ASTM A106
|ASTM A106 pipe||ASTM A106 Grade A||ASTM A106 Grade B||ASTM A106 Grade C|
|Tensile Strength, min., psi||48,000||60,000||70,000|
|Yield Strength, min., psi||30,000||35,000||40,000|
TESTING REQUIREMENTS ASTM A106 PIPE
|NPS||On One Length from Each Lot of|
|Tensile||5 and smaller||<= 400|
|6 and larger||<= 200|
|Bending||2 and smaller||<= 400|
|Flattening||2 through 5||<= 400|
|6 and over||<= 200|
THE HYDROSTATIC TEST
The hydro test shall apply a pressure equal to 60% of the minimum yield strength for at least 5 seconds at atmospheric conditions. The maximum pressure shall not exceed 2500 psi for pipes up to 3 inches, and 2800 for larger sizes. If additional, non-standard, tests are executed, the pipe shall bear an “S” mark on each length or pipe bundle.
MARKING REQUIREMENTS ASTM A106 PIPE
Each length of pipe (or bundle for smaller diameters) shall have the following markings applied:
- Manufacturer name
- ASTM A106 Grade B (or A, C)
- Diameter and ANSI schedule (from 10 to 160 and XXS)
- Pipe length
- Heat number
- Hydrostatic test pressure or NDE
ASTM A106 PIPE MANUFACTURERS
|Jiangu Chengde Steel Tube||China|
|Mittal Steel||Czech Republic Romania|
|NKK / Tenaris||Japan|
ASTM A106 PIPE PRICES
Looking for the price of ASTM A106 pipes? Click on the image and check our online ASTM A106 pipe price estimation tool!
The tool estimates the price for seamless pipes manufactured in Europe and Asia, for example:
What is a schedule 40 steel pipe price (6 inches, ASTM A106 Gr. B)?
Even if our price estimates are reliable, prices shall always be double checked with ASTM A106 pipe manufacturers and distributors.
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