ASTM A106/ASME SA106 is a standard specification for seamless carbon steel pipe for high temperature service. It includes three grades: A, B and C, of which Grade B is the most commonly used. This type of pipe is used in various industries, including piping systems for oil and gas, water and mineral slurry transportation. It is also used in boiler systems and for building and structural purposes.
ASTM A106 Grade B pipe is considered equivalent to ASTM A53 Grade B and API 5L Grade B in terms of chemical composition and mechanical properties. It is a carbon steel with a minimum yield strength of 240 MPa and a minimum tensile strength of 415 MPa.
Below, we will explain ASTM A106 Grade B pipe from different aspects:
ASTM A106 Grade B pipe (A106M - 18) is a standard specification for seamless carbon steel pipe for high temperature service. ASTM A106 pipe is always delivered in a seamless method and can be bent, coiled and flanged. Carbon Steel astm a106 Pipe, ASTM A106 Grade B pipe sizes, less than 2 inches, are usually delivered as cold drawn products. 2 inches and above are usually hot worked. SA106 pipe is expected to be used in high temperature applications. General Properties Steel Seamless Pipe Grade A106/A106M. - is a steel used for high temperature service, it is a steel capable of tasks such as bending, welding and flange connection.
What is A106 Pipe?
A106 Pipe is a black carbon steel pipe, A106 Gr B Sch 40, A106 Gr B Erw Pipe and ASTM A106 Seamless Pipe are suitable for high temperature and high pressure services. ASTM/ASME A-106/SA-106 Grade Seamless Pipe is one of our most widely used carbon steel grades and is readily available from stock in all standard thicknesses (up to SCH160). These A106 Seamless Pipe, SA106 Pipe, ASTM A106 Grade B Line Pipe are available in three different strengths of Grades A, B and C. NPS 1-1/2 and below may be A106 Grade B hot finished or A106 Grade B cold drawn. NPS 2 and above shall be A106 Grade B hot finished unless otherwise specified. Surface finish standards are outlined in the specification. SA106 material, ASTM A106 Grade A and ASTM A106 B are available in most sizes and schedule numbers, with SA106 Grade B allowing higher carbon and manganese content than Grade A. A106 Grade B Pipe, ASTM A106 Grade B Schedule 40 Pipe, and A106 Black Pipe offered by ASTM 
Seamless Pipes have a maximum carbon content of 0.23%.
 
 
ASTM A106 Grade B Pipe Size Chart
This standard covers NPS (National Standard Straight Pipe) pipe sizes from 1/8” to 48” (10.3mm DN6 – 1219mm DN1200). It also complies with the nominal wall thickness specified in ASME B 36.10M. For sizes not covered by ASME B 36.10M, this standard specification may still be used.
| NPS [inches] | WT[inches] | OD [mm] | Weight [lb/ft] | OD [inches] | WT [mm] | Weight [kg/m] | 
| 1/2 | 0.0109 | 21.03 MM | 0.085 | 0.0840 | 2.077 MM | 1.027 | 
| 1/8 | 0.0068 | 10.03 MM | 0.024 | 0.0405 | 1.073 MM | 0.037 | 
| 3/4 | 0.0113 | 26.07 MM | 1.013 | 1.0050 | 2.087 MM | 1.069 | 
| 1/4 | 0.0088 | 13.07 MM | 0.042 | 0.0540 | 2.024 MM | 0.084 | 
| 1 | 0.0133 | 33.04 MM | 1.068 | 1.0315 | 3.038 MM | 2.050 | 
| 1 1/2 | 0.0145 | 48.03 MM | 2.072 | 1.0900 | 3.068 MM | 4.005 | 
| 2 | 0.0154 | 60.03 MM | 3.065 | 2.0375 | 3.091 MM | 5.044 | 
| 1 1/4 | 0.0140 | 42.02 MM | 2.027 | 1.0660 | 3.056 MM | 3.039 | 
| 2 1/2 | 0.0203 | 73.00 MM | 5.079 | 2.0875 | 5.016 MM | 8.063 | 
| 3 1/2 | 0.0226 | 101.06 MM | 9.011 | 4.0000 | 5.074 MM | 13.057 | 
| 4 | 0.0237 | 114.03 MM | 10.079 | 4.0500 | 6.002 MM | 16.007 | 
| 3 | 0.0216 | 88.09 MM | 7.058 | 3.0500 | 5.049 MM | 11.029 | 
| 5 | 0.0258 | 141.03 MM | 14.062 | 5.0563 | 6.055 MM | 21.077 | 
| 32 | 0.0688 | 813.00 MM | 230.008 | 32 | 17.048 MM | 342.091 | 
| 8 | 0.0322 | 219.01 MM | 28.055 | 8.0625 | 8.018 MM | 42.055 | 
| 6 | 0.0280 | 168.03 MM | 18.097 | 6.0625 | 7.011 MM | 28.026 | 
| 10 | 0.0365 | 273.00 MM | 40.048 | 10.0750 | 9.027 MM | 60.031 | 
| 14 | 0.0375 | 355.06 MM | 54.057 | 14 | 11.013 MM | 94.055 | 
| 12 | 0.0406 | 323.08 MM | 53.052 | 12.0750 | 10.031 MM | 79.073 | 
| 16 | 0.0500 | 406.04 MM | 82.077 | 16 | 12.070 MM | 123.030 | 
| 20 | 0.0594 | 508.00 MM | 123.011 | 20 | 15.009 MM | 183.042 | 
| 18 | 0.0562 | 457.00 MM | 104.067 | 18 | 14.027 MM | 155.080 | 
| 24 | 0.0688 | 610.00 MM | 171.029 | 24 | 17.048 MM | 255.041 | 
A106 Grade B Carbon Steel Pipe Chemical Composition
| NB | Size | OD | 5S | 40S | 10S | S60 | S20 | S10 | S40 | S80 | XS/80S | S120 | S100 | S160 | S140 | XXS | 
| milimeter | 
| 15 | 1/2” | 21.034 | 1.07 | 2.08 | 2.01 |  |  |  | 2.077 | 3.073 | 3.073 |  |  | 4.078 |  | 7.047 | 
|  | 1/4” | 13.072 |  |  | 1.07 |  |  |  | 2.024 | 3.002 |  |  |  |  |  |  | 
| 32 | 1 1/4” | 42.016 | 1.07 | 3.06 | 2.08 |  |  |  | 3.056 | 4.085 | 4.085 |  |  | 6.035 |  | 9.07 | 
|  | 1/8” | 10.029 |  |  | 1.02 |  |  |  | 1.073 | 2.041 |  |  |  |  |  |  | 
| 20 | 3/4” | 26.067 | 1.07 | 2.09 | 2.01 |  |  |  | 2.087 | 3.091 | 3.091 |  |  | 5.056 |  | 7.082 | 
|  | 3/8” | 17.015 |  |  | 1.07 |  |  |  | 2.031 | 3.02 |  |  |  |  |  |  | 
| 25 | 1” | 33.04 | 1.07 | 3.04 | 2.08 |  |  |  | 3.038 | 4.055 | 4.055 |  |  | 6.035 |  | 9.009 | 
| 50 | 2” | 60.033 | 1.07 | 3.09 | 2.08 |  |  |  | 3.091 | 5.054 | 5.054 |  |  | 9.074 |  | 11.01 | 
| 65 | 2 1/2” | 73.003 | 2.01 | 5.02 | 3.01 |  |  |  | 5.016 | 7.001 | 7.001 |  |  | 9.053 |  | 14 | 
| 40 | 1 1/2” | 48.026 | 1.07 | 3.07 | 2.08 |  |  |  | 3.068 | 5.008 | 5.008 |  |  | 7.014 |  | 10.02 | 
| 80 | 3” | 88.09 | 2.01 | 5.05 | 3.01 |  |  |  | 5.049 | 7.062 | 7.062 |  |  | 11.01 |  | 15.02 | 
| 100 | 4” | 114.03 | 2.01 | 6 | 3.01 |  |  |  | 6.002 | 8.056 | 8.056 | 11.01 |  | 13.05 |  | 17.01 | 
| 90 | 3 1/2” | 101.06 | 2.01 | 5.07 | 3.01 |  |  |  | 5.074 | 8.008 | 8.008 |  |  |  |  |  | 
| 125 | 5” | 141.03 | 2.08 | 6.06 | 3.04 |  |  |  | 6.055 | 9.053 | 9.053 | 12.07 |  | 15.09 |  | 19.01 | 
| 200 | 8” | 219.01 | 2.08 | 8.02 | 3.08 | 10.03 | 6.04 |  | 8.018 | 12.07 | 12.07 | 19.03 | 15.01 | 23 | 20.06 | 22.02 | 
| 250 | 10” | 273.01 | 3.04 | 9.03 | 4.02 | 12.07 | 6.04 |  | 9.027 | 15.01 | 12.07 | 21.04 | 19.03 | 28.06 | 25.04 | 25.04 | 
| 150 | 6” | 168.03 | 2.08 | 7.01 | 3.04 |  |  |  | 7.011 | 11 | 10.097 | 14.03 |  | 18.03 |  | 22 | 
| 300 | 12” | 323.09 | 4 | 9.05 | 4.06 | 14.03 | 6.04 |  | 10.03 | 17.05 | 12.07 | 25.04 | 21.04 | 33.03 | 28.06 | 25.04 | 
| 400 | 16” | 406.04 | 4.02 | 9.05 | 4.08 | 16.07 | 7.09 | 6.04 | 12.07 | 21.04 | 12.07 | 31 | 26.02 | 40.05 | 36.05 |  | 
| 450 | 18” | 457.02 | 4.02 | 9.05 | 4.08 | 19.01 | 7.09 | 6.04 | 14.03 | 23.08 | 12.07 | 34.09 | 29.04 | 45.02 | 39.07 |  | 
| 350 | 14” | 355.06 | 4 | 9.05 | 4.08 | 15.01 | 7.09 | 6.04 | 11.01 | 19.01 | 12.07 | 27.08 | 23.08 | 35.07 | 31.08 |  | 
| 500 | 20” | 508 | 4.08 | 9.05 | 5.05 | 20.06 | 9.05 | 6.04 | 15.01 | 26.02 | 12.07 | 38.01 | 32.05 | 50 | 44.05 |  | 
| 600 | 24” | 609.06 | 5.05 | 9.05 | 6.04 | 24.06 | 9.05 | 6.04 | 17.05 | 31 | 12.07 | 46 | 38.09 | 59.05 | 52.04 |  | 
| 650 | 26” | 660.04 |  | 9.05 |  |  | 13 | 7.09 |  |  | 12.07 |  |  |  |  |  | 
| 550 | 22” | 558.08 | 4.08 | 9.05 | 5.05 | 22.02 | 9.05 | 6.04 |  | 28.06 | 12.07 | 41.03 | 34.09 | 54 | 47.06 |  | 
| 700 | 28” | 711.02 |  | 9.05 |  |  | 13 | 7.09 |  |  | 12.07 |  |  |  |  |  | 
| 800 | 32” | 812.08 |  | 9.05 |  |  | 13 | 7.09 | 17.05 |  | 12.07 |  |  |  |  |  | 
| 850 | 34” | 863.06 |  | 9.05 |  |  | 13 | 7.09 | 17.05 |  | 12.07 |  |  |  |  |  | 
| 750 | 30” | 762 | 6.04 | 9.05 | 7.09 |  | 13 | 7.09 |  |  | 12.07 |  |  |  |  |  | 
| 900 | 36” | 914.04 |  | 9.05 |  |  | 13 | 7.09 | 19.01 |  | 12.07 |  |  |  |  | 
 
Raw Materials
The materials used in the ASTM A106 standard specification shall be suitable for bending, flanging or similar forming processes. If the steel is to be welded, the welding process shall be suitable for this grade of ASTM A106 and suitable for high temperature service environments.
If a higher grade or higher grade of ASTM A106 steel pipe is required, the standard provides optional supplementary requirement specifications. In addition, these supplementary specifications require additional testing when ordering pipes that meet this standard.
Standards Referenced for Manufacturing ASTM A106 Pipes
Referenced ASTM Standards:
a. ASTM A530/ A530M: This is a standard specification for general requirements for carbon steel and alloy pipes.
b. E213: Standard for ultrasonic testing.
c. E309: Standard for eddy current testing.
d. E381: Standard for macroetching test schedules for steel products such as rebar, billets, billets, and forged steel.
e. E570: Standard for Test Plans for Magnetic Flux Leakage Testing of Ferromagnetic Steel Pipe and Piping Products.
f. Related ASME Standards:
g. ASME B 36.10M: Standard Specification for Nominal Dimensions of Welded and Seamless Steel Pipe.
h. Related Military Standards:
i. MIL-STD-129: Standard for Marking for Shipping and Storage.
j. MIL-STD-163: Standard for Storage and Shipping of Steel Forgings.
k. Related Federal Standards:
l. Fed. Std. Federal Standard No. 123: Standard for Marking and Shipping for Civilian Agencies.
m. Fed. Std. No. 183: Standard Specification for Continuous ID Marking of Steel Products.
n. Surface Standards:
o. SSPC-SP 6: Standard Specification for Surface Preparation.
ASTM A106 Grade B Steel Pipe Specifications
Size Range: 1/2” NB to 36” NB
Thickness: SCH 40, 
SCH 80, SCH 160, SCH XS, SCH XXS, All Schedules
Applications: Refineries, Petrochemical, Power Generation (Nuclear/Thermal), Steel, Sugar, Boiler Plant, Pressure Vessels and General Engineering Purposes
Line Pipe End Connections: Plain, Beveled, Threaded, Threaded
Types: Seamless / 
ERW / Welded / Fabricated / CDW
Shapes: Round, Square, Rectangular, Coil, U-Tube, Coiled, Hydraulic
Lengths: Single Random, Double Random and Required Length, Custom Sizes - 12 Meter Lengths
Ends: Plain End, Beveled End, Threaded End
End Protection: Plastic Caps
External Coating: Black Paint, Anti-Corrosion Oil, Galvanized Surface Treatment, Surface Treatment as per Customer Requirement
Inspection, Test Report: Factory Test Certificate, EN 10204 3.1, Chemical report, Mechanical report, PMI test report, Visual inspection report, Third-party inspection report, NABL approved laboratory report, Destructive test report, Non-destructive test report, Indian Boiler Regulation (IBR) test certificate
Packing: Wooden box, plastic bag, steel strapping, or packaging as per customer requirements
Features: In addition to the above sizes and specifications, can be produced according to requirements
Seamless Pipe ASTM A106 Grade B Pressure Rating
| Max. Pressure Allowable (psi) | 
| NPS | OD | Sch | 
| (in) | (in) | 40 | 20 | 60 | 30 | 10 | 100 | 140 | 160 | XS | STD | 80 | XXS | 120 | 
| 1/2 | 0.084 | 6358 |  |  |  |  |  |  | 10908 | 8575 | 6358 | 8575 | 17150 |  | 
| 1/4 | 0.054 | 7985 |  |  |  |  |  |  |  | 10798 | 7985 | 10798 |  |  | 
| 3/4 | 1.005 | 5273 |  |  |  |  |  |  | 10220 | 7187 | 5273 | 7187 | 14373 |  | 
| 3/8 | 0.0675 | 6606 |  |  |  |  |  |  |  | 9147 | 6606 | 9147 |  |  | 
| 1 | 1.0315 | 4956 |  |  |  |  |  |  | 9316 | 6670 | 4956 | 6670 | 13340 |  | 
| 1 1/2 | 1.09 | 3739 |  |  |  |  |  |  | 7247 | 5158 | 3739 | 5158 | 10316 |  | 
| 2 | 2.0375 | 3177 |  |  |  |  |  |  | 7097 | 4498 | 3177 | 4498 | 8995 |  | 
| 1 1/4 | 1.066 | 4133 |  |  |  |  |  |  | 7380 | 5638 | 4133 | 5638 | 11276 |  | 
| 2 1/2 | 2.0875 | 3460 |  |  |  |  |  |  | 6391 | 4704 | 3460 | 4704 | 9408 |  | 
| 3 1/2 | 4 | 2769 |  |  |  |  |  |  |  | 3896 | 2769 | 3896 |  |  | 
| 3 | 3.05 | 3024 |  |  |  |  |  |  | 6132 | 4200 | 3024 | 4200 | 8400 |  | 
| 5 | 5.0563 | 2273 |  |  |  |  |  |  | 5505 | 3303 | 2273 | 3303 | 6606 | 4404 | 
| 6 | 6.0625 | 2071 |  |  |  |  |  |  | 5318 | 3195 | 2071 | 3195 | 6390 | 4157 | 
| 32 | 32 | 1054 | 766 |  | 957 | 478 |  |  |  |  | 574 |  |  |  | 
| 4 | 4.05 | 2581 |  |  |  |  |  |  | 5782 | 3670 | 2581 | 3670 | 7339 | 4769 | 
| 8 | 8.0625 | 1829 | 1420 | 2307 | 1574 |  | 3375 | 4613 | 5147 | 2841 | 1829 | 2841 | 4971 | 4085 | 
| 12 | 12.075 | 1560 | 961 | 2160 | 1268 |  | 3244 | 4324 | 5042 | 1922 | 1441 | 2644 | 3843 | 3843 | 
| 10 | 10.075 | 1664 | 1140 | 2279 | 1399 |  | 3277 | 4558 | 5128 | 2279 | 1664 | 2708 | 4558 | 3847 | 
| 14 | 14 | 1533 | 1092 | 2079 | 1313 | 875 | 3283 | 4375 | 4921 | 1750 | 1313 | 2625 |  | 3829 | 
| 18 | 18 | 1530 | 849 | 2042 | 1192 | 681 | 3147 | 4252 | 4848 | 1361 | 1021 | 2553 |  | 3743 | 
| 16 | 16 | 1531 | 956 | 2009 | 1148 | 766 | 3157 | 4404 | 4882 | 1531 | 1148 | 2585 |  | 3733 | 
| 20 | 20 | 1455 | 919 | 1989 | 1225 | 613 | 3138 | 4288 | 4824 | 1225 | 919 | 2526 |  | 3675 | 
| 24 | 24 | 1405 | 766 | 1978 | 1147 | 510 | 3126 | 4210 | 4786 | 1021 | 766 | 2489 |  | 3700 | 
| 30 | 30 |  | 817 |  | 1021 | 510 |  |  |  | 817 | 613 |  |  |  | 
| 22 | 22 |  | 835 | 1949 | 1114 | 557 | 3063 | 4176 | 4733 | 1114 | 835 | 2506 |  | 3619 | 
| 36 | 36 | 1021 | 681 |  | 851 | 425 |  |  |  |  | 510 |  |  |  | 
| 34 | 34 | 992 | 721 |  | 901 | 450 |  |  |  |  | 540 |  |  |  | 
| 42 | 42 | 875 | 583 |  | 729 |  |  |  |  |  | 438 |  |  | 
SA 106 Gr B Pipe Surface Finish
End Finishes: Coupled, Square Cut, Threaded, Beveled
Surface Finishes: Oiled, Tape Wrap, Bare, Galv, Mill Varnish,FBE Dual, FBE, 3LPP, 3LPE, Concrete Coating, Coal Tar.
Purchase A106 Seamless Pipe in specific size Directly from manufacturer at factory price , Check out our inventory of A106 Steel Pipe
A106 Grade B Carbon Steel Pipe Applications
Low and medium pressure boiler
High pressure boiler
Ship-building
Liquid service
petroleum cracking
chemical fertilizer equipment
Drawing-oil-equipment and structure purposes
ASTM A106 Suppliers
Baowi Steel is an exporter and supplier of ASTM A106 welded pipe, ASTM A106 spiral welded pipe, ASTM A106 double welded pipe, ASTM A106 welded steel pipe, ASTM A106 seam welded pipe, A106 Gr B Sch 40 continuous welded pipe, ASTM A106 furnace welded pipe, ASTM A106 Grade B pipe and ASTM A106 longitudinal welded pipe.
We are well aware of the importance of reliability and durability in projects, so we strictly follow international standards for production. Each pipe is carefully manufactured and tested to ensure excellent strength, pressure resistance and corrosion resistance. Baowi Steel always focuses on customer needs and provides high-quality solutions to protect your projects. Choose Baowi Steel, choose a trustworthy partner, and make your project better!