ASTM A106 also known as ASME SA106 pipes specification generally refers to pipes that are of seamless construction and are majorly used for transportation of gas and liquid from one location to another location, ASTM A106 pipes are most suitable for High-temperature services and handle a good amount of pressure. These pipes are manufactured as per the dimension standard of ANSI B36.10 / ASME B36.10. In ASTM A106 Grade B is the most commonly used pipe, this grade is the client’s first choice for use, due to economical prices and ease of availability throughout the world.
ASTM A106 Grade B Steel Pipe
A106 SCH 40 Carbon Steel Pipe
ASME SA 106 Grade B Seamless Pipe
The pipes have minimum Yield strength of 240 MPa for grade B pipes and 275 MPa for grade C pipes and minimum tensile strength of 415 MPa for grade B pipes and 485 MPa for grade C pipes with a minimum elongation of 16.5%/30%.
The pipes are manufactured by cold drawn finish process or Hot finished process. Cold draw finish pipes require subsequent heat treatment of Normalizing at 900 deg. C. These pipes are mainly used in industries such as oil and gas refineries, petrochemical plants, boiler, chemical plants, Shipbuilding.
N-Pipe Solutions Inc. is a major supplier of Carbon Steel Seamless pipes from India. We provide high-quality pipes to clients throughout the world. Pipes are stock in NPS/NB dimension as per ASME B36.10 in various thicknesses as per clients requirements. All pipes supplied by us are duly inspected by our in-house quality control department before being supplied to the client. All pipes are available with complete traceability and mill test certificate as per EN 10204 3.1.
We provide the best competitive prices to our clients backed by quality service.
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This specification covers seamless carbon steel pipe for high-temperature service with nominal (average) wall thickness as given in ASME B36.10M. Pipe ordered under this specification shall be suitable for bending, flanging, and similar forming operations and welding.
ASTM A 530/A 530M Specification for General Requirements for Specialized Carbon and Alloy Steel Pipe.
ASMT E 213 Practice for Ultrasonic Examination of Metal Pipe and Tubing.
ASTM E 309 Practice for Eddy-Current Examination of Steel Tubular Products Using Magnetic Saturation.
ASMT E 381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings.
ASTM E 570 Practice for Flux Leakage Examination of Ferromagnetic Steel Tubular Products.
ASME B36.10M Dimension standard for Seamless and Welded pipes.
For ordering material to ASTM A106 specification following details are required
The steel shall be killed steel, with the 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
For pipe NPS 1-1/2 and under, it shall be permissible to furnish hot finished or cold drawn.
For pipe NPS 2 [DN 50] and over shall be furnished hot finished.
Pipes manufactured by the cold-drawn process must be supplied in Normalized conditions
Pipes manufactured by the Hot finished does not require and heat treatment process.
|Grade A||Grade B||Grade C|
|Carbon max. %||0.25||0.30*||0.35*|
|*Manganese %||0.27 to 0.93||*0.29 to 1.06||*0.29 to 1.06|
|Phosphorous, max. %||0.035||0.035||0.035|
|Sulfur, max. %||0.035||0.035||0.035|
|Chrome, max. %||0.40||0.40||0.40|
|Copper, max. %||0.40||0.40||0.40|
|Molybdenum, max. %||0.15||0.15||0.15|
|Nickel, max. %||0.40||0.40||0.40|
|*Unless otherwise specified by the purchaser, 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 1.65% (1.35% for ASME SA106).|
Bend test for pipes 2” NPS and under
Flattening Test for pipes 2.5” NPS and over
|Degree of Bend||Diameter of Mandrel|
|For Normal A106 Uses||90||12 x nom dia. of pipe|
|For Close Coiling||180||8 x nom dia. of pipe|
Outside Diameter at any point shall not vary from standard specified more than:
|NPS [DN Designator]||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|
At any given point the thickness of the pipe should not be 12.5% under the nominal wall thickness as specified.
The weight of any length of pipe shall not vary more than 10% over and 3.5% under that specified.
Each length of pipe shall be subjected to the hydrostatic test without leakage through the pipe wall. The hydro test produces stress in the pipe wall equal to 60% of SMYS (Specified minimum Yield strength) at room temperature. For pipes upto 3” NPS hydro test cannot exceed 2500 PSI and for size greater than 3” it cannot exceed 2800 PSI.
Pipes are supplied in single random length of 4 to 7 meter long or double random length of 9 to 12 meter long
A pipe must carry the following information in marking stenciled on the pipes
Manufacture Name or Brand logo, Material specification, pipe size as per ASNI chart, length, Heat no., Hydro test pressure and or NDE, additional S if any supplementary test performed.
Orders for material under this specification should include the following, as required, to describe the desired material adequately:
|Quantity||Feet, centimeters, or number of lengths|
|Name of material||Seamless|
|Grade||Grade A, Grade B, or Grade C|
|Manufacture||Hot-finished or cold-drawn|
|Size||NPS or Outside Diameter and Schedule Number of Average Wall Thickness|
|Special outside diameter tolerance pipe|
|Inside diameter tolerance pipe, over 10 in ID|
|Length||Specific or random|
|Test Report Required|