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ASTM A106 Grade B Seamless Pipe

Exporters of SA106 Seamless Pipe, ASTM A106 Grade B Carbon Steel Pipe, Check ASTM A106 Gr B Pipe Specification

ASTM A106 Grade B Steel Pipe

ASTM A106 Grade B Steel Pipe

A106 Pipe Specifications

Standard : ASTM A106, ASME SA106

Size: 1/2" to 24", * size above 24” NPS can be arranged on request

Schedule: SCH10, SCH 40, SCH 80, SCH 160 To SCH XXS

as per ANSI B36.10 / ASME B36.10

Type : Seamless

Grade : Grade B And Grade C


ASTM A106 seamless pipe also known as ASME SA106 pipes 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.

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.

Click here to request a quote for A 106 Grade B pipe.

Table of Contents

We at N-Pipe Solutions Inc. stock a wide range of ASTM A106 pipes

  • Pipes are offered in Grade B and Grade C
  • Pipes are offered from size ¼” NPS up to 24” NPS, however large-diameter pipes above 24” NPS can also be provided upon clients request.
  • Pipes thickness range from SCH 20 up to SCH XXS as per ANSI B36.10 / ASME B36.10
  • We can also offer non-standard thickness which is not available in the above dimension standard.
  • These pipes can be supplied in a single random length of 4 – 7 Meters long and double random length of 7 – 12 Meters long, if there is a client’s requirement, we can also provide fixed length pipes.
  • Pipes can be offered with Mill test certificate as per EN 10204 3.1 and 3.2
  • Pipes can be all offered with IBR Form III meeting the Indian boiler requirements.
  • Pipes can be supplied with additional specifications NACE MR0175, NACE MR0103, H2 Service, Wet H2S Service, AXN1, AXN2, AXN3, AXN4, UOP1, UOP2, NAC4, NAC6, NAC7.
  • Pipes can be offered under any Third-party inspection agency of client choice.

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.

Scope of ASTM A106 specification

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.


Reference standard of ASTM A106 specification

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.


Ordering information

For ordering material to ASTM A106 specification following details are required

  • Grade
  • The manufacturing process (Hot roller or Cold-drawn)
  • Size of pipes - Outer diameter and thickness of pipes
  • Length of pipes
  • Quantity of pipes in Meter or Feet or lengths
  • Option requirement like S1 to S8
  • Hydro testing required or NDE test acceptable.


Manufacturing Process

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.


Heat Treatment

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.


Chemical Composition of ASTM A106 pipes

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
Silicon, min.% 0.10 0.10 0.10
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
Vanadium, max.% 0.08 0.08 0.08
*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).

Mechanical properties of ASTM A106 Pipes

Tensile test

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

Tolerance in Outer Diameter as per ASTM A106

Outside Diameter at any point shall not vary from standard specified more than:

NPS [DN Designator] Over Under
in. mm in. mm
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

Tolerance in wall thickness as per ASTM A106

At any given point the thickness of the pipe should not be 12.5% under the nominal wall thickness as specified.


Tolerance in weight as per ASTM A106

The weight of any length of pipe shall not vary more than 10% over and 3.5% under that specified.


Hydrostatic test

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.


Pipe length

Pipes are supplied in single random length of 4 to 7 meter long or double random length of 9 to 12 meter long


Manufacture marking of pipes

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.


General Information

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
Supplementary requirements
Test Report Required
Specification designation
Hydrostatic test
Special requirements

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