ASTM A106/A106M Grade B is a seamless carbon steel pipe specification for high-temperature service. Kalpataru Piping supplies ASTM A106 Grade B pipe within its carbon steel pipes and tubes range, with a listed commercial range of 1/2 to 36 in NPS and Schedule 10 to XXS, subject to size and availability. Grade B has minimum tensile and yield requirements of 415 MPa and 240 MPa respectively. Supply condition, testing, end preparation and documentation should be matched to the purchase specification and applicable piping code. For a quotation, send the NPS, schedule or wall thickness, length, quantity, end requirement, testing/certification requirement and delivery destination.
ASTM A106 Grade B Pipe Manufacturer & Supplier in India
ASTM A106/A106M Grade B is a seamless carbon steel pipe specification for high-temperature service. Kalpataru Piping supplies ASTM A106 Grade B pipe within its carbon steel pipes and tubes range, with a listed commercial range of 1/2 to 36 in NPS and Schedule 10 to XXS, subject to size and availability. Grade B has minimum tensile and yield requirements of 415 MPa and 240 MPa respectively. Supply condition, testing, end preparation and documentation should be matched to the purchase specification and applicable piping code. For a quotation, send the NPS, schedule or wall thickness, length, quantity, end requirement, testing/certification requirement and delivery destination.
Table of Contents
- ASTM A106 Grade B vs ASTM A53 Grade B
- ASTM A106 Grade B Pipe Specifications
- ASTM A106 Grade B Chemical Composition
- ASTM A106 Grade B Pipes Mechanical Properties
- ASTM A106 Grade B Pipe Dimensions & Weight – Schedule 40
- Pressure Rating Reference
- Applications of ASTM A106 Grade B Pipe
- Manufacturing Process & Quality Assurance
- Documentation, Packaging & Traceability
- Certifications & Project Documentation
- FAQ’s About ASTM A106 Grade B Pipes
- ASTM A106 Grade B vs ASTM A53 Grade B
- Specifications
- Chemical Composition
- Mechanical Properties
- Dimensions & Weight
- Pressure Rating
ASTM A106 Grade B vs ASTM A53 Grade B
This comes up on almost every A106 enquiry, so it’s worth laying out plainly:
|
Parameter |
ASTM A106 Grade B |
ASTM A53 Grade B |
|
Specification scope |
Seamless carbon steel pipe for high-temperature service |
Steel pipe for mechanical and pressure applications; also ordinary steam, water, gas and air service |
|
Construction |
Seamless only |
Seamless and welded types are covered |
|
Grade B tensile min. |
60,000 psi (415 MPa) |
60,000 psi (415 MPa) |
|
Grade B yield min. |
35,000 psi (240 MPa) |
35,000 psi (240 MPa) |
|
Selection rule |
Use when the project/material specification calls for ASTM A106 Grade B and the design code permits it |
Use when the project/material specification calls for ASTM A53 Grade B and the required pipe type/service is covered |
Do not select between ASTM A106 and ASTM A53 on a “safer” rule. Confirm the required material specification, pipe construction, design temperature/pressure and governing piping code for the project.
ASTM A106 Grade B Pipe Specifications
|
Parameter |
Detailed QC-approved wording |
|
Standard |
ASTM A106/A106M; ASME SA-106 where project documentation uses the ASME material designation |
|
Grade |
Grade B |
|
ASTM scope |
NPS 1/8 to NPS 48; nominal wall dimensions generally reference ASME B36.10M |
|
Kalpataru listed supply range |
1/2 to 36 in NPS – clearly label as company supply range |
|
Wall / schedule |
Schedule 10 to XXS as offered; verify actual schedule availability by NPS |
|
Manufacturing |
Seamless; hot-finished or cold-drawn as permitted / specified |
|
Length |
State actual stock/commercial lengths; avoid implying ASTM fixes 5–7 m or 12 m as universal |
|
Surface |
Black / oiled / painted / project-specified coating; galvanized only if actually supplied as post-treatment and project permits it |
|
Ends |
Plain / beveled / threaded where ordered and technically applicable |
|
Testing |
Tensile, bend/flattening as applicable; hydrostatic and/or nondestructive electric testing according to the current specification and purchase order |
|
Certification |
EN 10204 3.1 MTC; IBR/TPI/project documentation on request where applicable |
ASTM A106 Grade B Chemical Composition
|
Element |
Grade A |
Grade B |
Grade C |
|
Carbon |
0.25 |
0.30 |
0.35 |
|
Manganese |
0.27–0.93 |
0.29–1.06 |
0.29–1.06 |
|
Phosphorus |
0.035 |
0.035 |
0.035 |
|
Sulfur |
0.035 |
0.035 |
0.035 |
|
Silicon (min) |
0.10 |
0.10 |
0.10 |
|
Chromium |
0.40 |
0.40 |
0.40 |
|
Copper |
0.40 |
0.40 |
0.40 |
|
Molybdenum |
0.15 |
0.15 |
0.15 |
|
Nickel |
0.40 |
0.40 |
0.40 |
|
Vanadium |
0.08 |
0.08 |
0.08 |
ASTM A106 Grade B Pipes Mechanical Properties
|
Grade |
Tensile Strength (min) |
Yield Strength (min) |
|
Grade A |
48,000 psi (330 MPa) |
30,000 psi (205 MPa) |
|
Grade B |
60,000 psi (415 MPa) |
35,000 psi (240 MPa) |
|
Grade C |
70,000 psi (485 MPa) |
40,000 psi (275 MPa) |
ASTM A106 Grade B Pipe Dimensions & Weight – Schedule 40
A complete chart across all NPS and schedules is available on request. Sample values below:
|
NPS |
OD (mm) |
Wall Thickness (mm) |
Weight (kg/m) |
|
1/2″ |
21.3 |
2.77 |
1.27 |
|
1″ |
33.4 |
3.38 |
2.50 |
|
2″ |
60.3 |
3.91 |
5.44 |
|
4″ |
114.3 |
6.02 |
16.07 |
|
6″ |
168.3 |
7.11 |
28.26 |
|
8″ |
219.1 |
8.18 |
42.55 |
|
12″ |
323.8 |
10.31 |
79.73 |
Pressure Rating Reference
Maximum allowable working pressure of A106 Grade B pipe at 400°F, per ANSI B36.10 dimensions (sample values, psig):
|
NPS |
Sch 40 |
Sch 80 |
Sch 160 |
|
1/2″ |
6,358 |
8,575 |
10,908 |
|
1″ |
4,956 |
6,670 |
9,316 |
|
2″ |
3,177 |
4,498 |
7,097 |
|
4″ |
2,581 |
3,670 |
5,782 |
|
6″ |
2,071 |
3,195 |
5,318 |
Applications of ASTM A106 Grade B Pipe
- Refinery and process piping
- Steam and power-generation piping
- Petrochemical and chemical process lines
- Boiler / high-temperature utility piping where specified
- Heat exchanger and condenser piping where the design specification calls for A106
- General fabrication only where the service/design specification permits ASTM A106 Grade B
ASTM A106 Grade B pipe can be specified with matching carbon steel buttweld fittings and carbon steel flanges as part of a coordinated piping package. Confirm material grade, schedule, pressure class and dimensional standard across the connected components.
Manufacturing Process & Quality Assurance
A106 pipe starts as a round billet, pierced and rolled into a seamless tube, then either finished hot or drawn cold depending on size and spec. Bending, flanging, and similar forming operations are all fair game with this grade, which is part of why it’s specified so widely. Every batch goes through tensile, bending, and flattening tests on samples from each lot, and if a specimen shows a flaw during testing, it gets discarded and retested rather than passed through. If you want more background on grade selection or welding procedures for A106, our blog has some relevant write-ups.
Documentation, Packaging & Traceability
Order documentation can include the commercial invoice, packing list, EN 10204 3.1 MTC and project-specific inspection/test documents as agreed in the purchase order. Additional QAP, third-party inspection or laboratory reports should be offered only where available for the order. Packaging should be selected by pipe size, finish and transport method, with end protection and corrosion protection applied where required for storage or sea freight.
Certifications & Project Documentation
- ISO 9001:2015 Quality Management Certification
- EN 10204 3.1 Mill Test Certificate
- IBR documentation / approval available where the specific order and application require it
- Third-party inspection on request
- Sour-service material/testing can be offered where specified, subject to NACE MR0175/ISO 15156 and project requirements; confirm hardness, chemistry and required HIC/SSC testing before quoting.
You can see the rest of what we stock in our full catalog.
FAQ’s About ASTM A106 Grade B Pipes
What is ASTM A106 Grade B pipe?
ASTM A106/A106M Grade B is a seamless carbon steel pipe specification intended for high-temperature service. The exact project suitability depends on the governing piping code, design conditions and purchase specification.
What is the difference between ASTM A106 Grade B and ASTM A53 Grade B?
ASTM A106 Grade B is a seamless high-temperature-service pipe specification. ASTM A53 Grade B covers welded and seamless pipe for mechanical and pressure applications and ordinary steam, water, gas and air service. Select the specification required by the project and design code.
What sizes does Kalpataru supply?
The current brief lists a Kalpataru supply range of 1/2 to 36 in NPS and Schedule 10 to XXS, subject to size and availability. ASTM A106/A106M itself has a wider standard scope.
What is the maximum temperature of ASTM A106 Grade B pipe?
Do not use one universal maximum temperature from the ASTM material specification. Allowable service depends on the design code, pressure, wall thickness, allowable stress and project conditions.
Is ASTM A106 Grade B seamless or welded?
ASTM A106/A106M is a seamless carbon steel pipe specification. Do not describe ERW, LSAW or other welded pipe as ASTM A106 product construction.
What tests are required for ASTM A106 Grade B pipe?
The specification includes mechanical testing and bend/flattening testing as applicable, together with hydrostatic and/or nondestructive electric testing requirements. The exact inspection package should match the current ASTM edition and purchase order.
What documents can be supplied?
Orders can be supplied with EN 10204 3.1 MTC and, where applicable and agreed, IBR documentation, third-party inspection and project-specific test reports.
How is ASTM A106 Grade B pipe priced?
Price depends on NPS, schedule or wall thickness, length, quantity, origin/mill, testing/certification, coating/end preparation and delivery destination. Send the full requirement for a size-wise quotation.
