ASTM A106 Grade B Pipe, SA 106 Gr B Seamless Pressure Pipe & A106 Gr.B Carbon Steel Pipe Supplier, Stockist and Exporter in Mumbai, India
Jade Alloys is a direct manufacturer, stockist and exporter of Carbon Steel ASTM A106 Grade B Pipe the benchmark specification for seamless carbon steel pipe in high-temperature service. ASTM A106 / ASME SA106 covers three grades (A, B and C), of which A106 Gr B pipe is by far the most widely specified, offering a minimum tensile strength of 60,000 psi (415 MPa) and a minimum yield strength of 35,000 psi (240 MPa).
ASTM A106 Gr.B material is the default choice wherever pressurised fluids, steam or hot gases are conveyed at elevated temperature: refinery process lines, boiler and superheater circuits, power plant piping, petrochemical units and oil & gas transmission. Its chemistry is closely aligned with ASTM A53 Grade B and API 5L Grade B, but A106 is manufactured seamlessly and is qualified for high-temperature service which is why engineers specify A106 Grade B seamless pipe where A53 or API 5L would not be accepted.
We stock A106 Gr B pipe from 1/2″ NB to 48″ NB in SCH 20 through SCH 160, XS and XXS, in seamless, ERW, LSAW and EFSW construction. Each length ships with EN 10204 3.1 mill certification, full heat-number traceability and, where required, NACE MR0175, HIC and IBR documentation. Coated and lined options — FBE, 3LPE, 3LPP, galvanised and CRA clad are supplied to project specification.
Quick Section Links
- ASTM A106 Grade B Pipe Specifications
- ASTM A106 Gr B Pipe Chemical Composition
- Carbon Steel ASTM A106 Grade B Pipe Mechanical Properties
- ASTM A106 Grade B Pipe Schedule and Wall Thickness Chart (mm)
- ASTM A106 Gr B Pipe Maximum Allowable Pressure (psi)
- ASTM A106 Grade B vs ASTM A53 Grade B vs API 5L Grade B
- ASTM A106 Grade B Pipe Types and End Finishes
- ASTM A106 Grade B Pipe Coating and Surface Finish
- Testing and Inspection of ASTM A106 Gr B Pipe
- ASTM A106 Grade B Pipe Tolerances
- ASTM A106 Grade B Pipe Marking, Packing and Documentation
- Applications of Carbon Steel ASTM A106 Grade B Pipe
- Related Products
- Frequently Asked Questions — ASTM A106 Grade B Pipe
- Countries We Export ASTM A106 Grade B Pipe To
ASTM A106 Grade B Pipe Specifications
| Parameter | ASTM A106 Grade B Pipe |
|---|---|
| Specification | ASTM A106 / ASME SA106 |
| Grades covered | Grade A, Grade B, Grade C |
| Dimensional standard | ASME B36.10M / ANSI B36.10 |
| Size — Seamless | 1/2″ to 26″ NB (21.3 – 660 mm OD) |
| Size — ERW / HFW | 1/2″ to 24″ NB |
| Size — LSAW / DSAW | 16″ to 100″ NB |
| Wall thickness | 2.11 mm to 85 mm |
| Schedules | SCH 10, 20, 30, 40, STD, 60, XS, 80, 100, 120, 140, 160, XXS |
| Type | Seamless, ERW, HFW, LSAW, DSAW, SSAW, EFW, EFSW, CDS |
| Length | SRL, DRL, 6 m (20 ft), 12 m (40 ft), cut-to-length |
| Pipe ends | Plain, Bevelled, Threaded & Coupled, Grooved |
| Equivalent grades | ASTM A53 Gr B, API 5L Gr B, EN 10216-2 P265GH |
| Temperature range | −29 °C to 427 °C (−20 °F to 800 °F) |
| Coating | FBE, 3LPE, 3LPP, Epoxy, Coal Tar Enamel, CWC, Galvanised |
| Lining / cladding | CRA Clad & Lined, PTFE Lined, Epoxy Lined |
| Certification | EN 10204 3.1 / 3.2, IBR, NACE MR0175 / MR0103, HIC, SSC, PED |
| Value-added services | Bending, galvanising, heat treatment, machining, bevelling, threading |
ASTM A106 Gr B Pipe Chemical Composition
| Element | Grade A | Grade B | Grade C |
|---|---|---|---|
| Carbon (C), max % | 0.25 | 0.30 | 0.35 |
| Manganese (Mn), % | 0.27 – 0.93 | 0.29 – 1.06 | 0.29 – 1.06 |
| Phosphorus (P), max % | 0.035 | 0.035 | 0.035 |
| Sulphur (S), max % | 0.035 | 0.035 | 0.035 |
| Silicon (Si), min % | 0.10 | 0.10 | 0.10 |
| Chromium (Cr), max % | 0.40 | 0.40 | 0.40 |
| Copper (Cu), max % | 0.40 | 0.40 | 0.40 |
| Molybdenum (Mo), max % | 0.15 | 0.15 | 0.15 |
| Nickel (Ni), max % | 0.40 | 0.40 | 0.40 |
| Vanadium (V), max % | 0.08 | 0.08 | 0.08 |
For every 0.01% reduction below the maximum carbon, an increase of 0.06% Mn above the specified maximum is permitted, up to 1.35%. Combined Cr + Cu + Mo + Ni + V must not exceed 1.00%.
Carbon Steel ASTM A106 Grade B Pipe Mechanical Properties
| Property | Grade A | Grade B | Grade C |
|---|---|---|---|
| Tensile strength, min., psi (MPa) | 48,000 (330) | 60,000 (415) | 70,000 (485) |
| Yield strength, min., psi (MPa) | 30,000 (205) | 35,000 (240) | 40,000 (275) |
| Elongation, longitudinal, min % | 35 | 30 | 30 |
| Elongation, transverse, min % | 25 | 16.5 | 16.5 |
Elongation in 2 in. (50 mm): e = 625 000 × A^0.2 / U^0.9 (SI) — where A is the specimen cross-sectional area and U the specified minimum tensile strength.
Minimum wall at any point shall not be more than 12.5% under the specified nominal wall.
ASTM A106 Grade B Pipe Schedule and Wall Thickness Chart (mm)
| NB | Size | OD | SCH 10 | SCH 20 | SCH 40 / STD | SCH 80 / XS | SCH 160 | XXS |
|---|---|---|---|---|---|---|---|---|
| 15 | 1/2″ | 21.3 | 2.11 | – | 2.77 | 3.73 | 4.78 | 7.47 |
| 20 | 3/4″ | 26.7 | 2.11 | 2.41 | 2.87 | 3.91 | 5.56 | 7.82 |
| 25 | 1″ | 33.4 | 2.77 | 2.90 | 3.38 | 4.55 | 6.35 | 9.09 |
| 32 | 1¼” | 42.2 | 2.77 | 2.97 | 3.56 | 4.85 | 6.35 | 9.70 |
| 40 | 1½” | 48.3 | 2.77 | 3.18 | 3.68 | 5.08 | 7.14 | 10.15 |
| 50 | 2″ | 60.3 | 2.77 | 3.18 | 3.91 | 5.54 | 8.74 | 11.07 |
| 65 | 2½” | 73.0 | 3.05 | 4.78 | 5.16 | 7.01 | 9.53 | 14.02 |
| 80 | 3″ | 88.9 | 3.05 | 4.78 | 5.49 | 7.62 | 11.13 | 15.24 |
| 100 | 4″ | 114.3 | 3.05 | 4.78 | 6.02 | 8.56 | 13.49 | 17.12 |
| 125 | 5″ | 141.3 | 3.40 | – | 6.55 | 9.53 | 15.88 | 19.05 |
| 150 | 6″ | 168.3 | 3.40 | – | 7.11 | 10.97 | 18.26 | 21.95 |
| 200 | 8″ | 219.1 | 3.76 | 6.35 | 8.18 | 12.70 | 23.01 | 22.23 |
| 250 | 10″ | 273.0 | 4.19 | 6.35 | 9.27 | 15.09 | 28.58 | 25.40 |
| 300 | 12″ | 323.8 | 4.57 | 6.35 | 10.31 | 17.48 | 33.32 | 25.40 |
| 350 | 14″ | 355.6 | 6.35 | 7.92 | 11.13 | 19.05 | 35.71 | – |
| 400 | 16″ | 406.4 | 6.35 | 7.92 | 12.70 | 21.44 | 40.49 | – |
| 450 | 18″ | 457.2 | 6.35 | 7.92 | 14.27 | 23.83 | 45.24 | – |
| 500 | 20″ | 508.0 | 6.35 | 9.53 | 15.09 | 26.19 | 50.01 | – |
| 550 | 22″ | 558.8 | 6.35 | 9.53 | – | 28.58 | 53.98 | – |
| 600 | 24″ | 609.6 | 6.35 | 9.53 | 17.48 | 30.96 | 59.54 | – |
| 750 | 30″ | 762.0 | 7.92 | 12.70 | – | – | – | – |
| 900 | 36″ | 914.4 | 9.53 | 13.00 | 19.10 | – | – | – |
Calculate exact tonnage with our Metal Weights Calculator.
ASTM A106 Gr B Pipe Maximum Allowable Pressure (psi)
| NPS | OD (in) | STD / SCH 40 | XS / SCH 80 | SCH 160 | XXS |
|---|---|---|---|---|---|
| 1/2″ | 0.840 | 6,358 | 8,575 | 10,908 | 17,150 |
| 1″ | 1.315 | 4,956 | 6,670 | 9,316 | 13,340 |
| 1½” | 1.900 | 3,739 | 5,158 | 7,247 | 10,316 |
| 2″ | 2.375 | 3,177 | 4,498 | 7,097 | 8,995 |
| 3″ | 3.500 | 3,024 | 4,200 | 6,132 | 8,400 |
| 4″ | 4.500 | 2,581 | 3,670 | 5,782 | 7,339 |
| 6″ | 6.625 | 2,071 | 3,195 | 5,318 | 6,390 |
| 8″ | 8.625 | 1,829 | 2,841 | 5,147 | 4,971 |
| 10″ | 10.750 | 1,664 | 2,708 | 5,128 | 4,558 |
| 12″ | 12.750 | 1,441 | 2,644 | 5,042 | 3,843 |
| 16″ | 16.000 | 1,148 | 2,585 | 4,882 | – |
| 20″ | 20.000 | 919 | 2,526 | 4,824 | – |
| 24″ | 24.000 | 766 | 2,489 | 4,786 | – |
Indicative for design reference. Final allowable pressure must be calculated per ASME B31.1 / B31.3 for the actual design temperature, corrosion allowance and mill tolerance.
ASTM A106 Grade B vs ASTM A53 Grade B vs API 5L Grade B
| Standard | Grade | C | Mn | P | S | Tensile (MPa) | Yield (MPa) |
|---|---|---|---|---|---|---|---|
| ASTM A106 | B | ≤0.30 | 0.29–1.06 | ≤0.035 | ≤0.035 | ≥415 | ≥240 |
| ASTM A53 | B | ≤0.30 | ≤1.20 | ≤0.05 | ≤0.045 | ≥415 | ≥240 |
| API 5L | B (PSL1) | ≤0.28 | ≤1.20 | ≤0.030 | ≤0.030 | ≥414 | ≥241 |
| EN 10216-2 | P265GH | ≤0.20 | 0.80–1.40 | ≤0.025 | ≤0.020 | 410–570 | ≥265 |
| DIN 1629 | St 37.0 | ≤0.17 | – | ≤0.040 | ≤0.040 | 350–480 | ≥235 |
| GB/T 8163 | 20# | 0.17–0.23 | 0.35–0.65 | ≤0.035 | ≤0.035 | 410–550 | ≥245 |
The practical difference: A106 and A53 share near-identical chemistry and strength. A106 is produced seamless only and is written for high-temperature service; A53 permits welded construction and is generally specified for lower-temperature mechanical and general pressure duty. Where the line runs hot, A106 Gr B is the correct call. Below −29 °C, switch to ASTM A333 Grade 6.
ASTM A106 Grade B Pipe Types and End Finishes
- Constructions supplied: Seamless (SMLS), Cold Drawn Seamless (CDS), Hot Finish Seamless (HFS), ERW, HFW, LSAW / DSAW, SSAW / HSAW, EFW / EFSW, SAW, Fabricated, Galvanised and CRA Clad & Lined.
- Pipe ends: Plain (PE / PBE / POE), Bevelled (BE / BBE / BOE / BLE / BSE), Threaded (TBE / TOE), Threaded & Coupled, Square Cut, Grooved.
- Welding: A106 Gr.B has excellent weldability and can be joined with standard qualified procedures — TIG, SAW, MAG (solid and cored wire) and manual arc welding. It is equally suitable for bending, flanging and similar forming operations.
ASTM A106 Grade B Pipe Coating and Surface Finish
- Surface finishes: Bare, Natural, Black, Oiled, Painted, Mill Varnished, anti-rust oil.
- Protective coatings: FBE (single & dual layer), 3LPE (3PE), 3LPP (3PP), Liquid Epoxy, Coal Tar Enamel, Concrete Weight Coating (CWC), Hot Dip Galvanising, internal & external epoxy, tape wrap, primer.
- Linings & cladding: CRA Clad and Lined, PTFE Lined, Epoxy Lined, Mild Steel Rubber Lining (MSRL).
- End protection: Plastic or iron caps.
Testing and Inspection of ASTM A106 Gr B Pipe
Mechanical tests required by ASTM A106:
| Test | Requirement |
|---|---|
| Tensile | NPS 8 and larger — transverse or longitudinal acceptable |
| Flattening | NPS 2 and larger |
| Cold bend | NPS 2 and under — 90°, mandrel Ø = 12 × nominal dia (180° / 8 × dia for close coiling) |
| Hydrostatic | Per ASTM A106; nondestructive electric test permitted in lieu, where specified |
Additional testing offered: Ultrasonic (UT), Radiographic (RT), Eddy Current, Flux Leakage, Charpy V-Notch Impact, HIC (NACE TM0284), SSC (NACE TM0177), IGC, Hardness, Burst, Salt Spray, Macro & Micro, PMI, Visual.
Standards referenced in manufacture: ASTM A530/A530M (general requirements), E213 (ultrasonic), E309 (eddy current), E381 (macroetch), E570 (flux leakage), ASME B36.10M (dimensions), SSPC-SP 6 (surface preparation).
Approvals: IBR · NACE MR0175 / MR0103 · PED 2014/68/EU · EIL · NORSOK M-650 · Saudi Aramco · Shell · ONGC · L&T · ISO 9001 · ISO 17025 labs.
ASTM A106 Grade B Pipe Tolerances
Outside diameter
| NPS [DN] | Over | Under |
|---|---|---|
| 1/8 to 1½ [6–40] | 0.4 mm | 0.4 mm |
| Over 1½ to 4 [40–100] | 0.8 mm | 0.8 mm |
| Over 4 to 8 [100–200] | 1.6 mm | 0.8 mm |
| Over 8 to 18 [200–450] | 2.4 mm | 0.8 mm |
| Over 18 to 26 [450–650] | 3.2 mm | 0.8 mm |
| Over 26 to 34 [650–850] | 4.0 mm | 0.8 mm |
| Over 34 to 48 [850–1200] | 4.8 mm | 0.8 mm |
Above 10″, where special OD tolerance is ordered, OD shall be within ±1%.
Wall thickness: −12.5% of nominal. Length (cut lengths): −0 / +6 mm. Weight: −3.5% / +10% up to NPS 12; −5% / +10% above NPS 12. Quantity: industry norm ±10%; Jade Alloys works to ±3%.
ASTM A106 Grade B Pipe Marking, Packing and Documentation
- Marking (rolled, die-stamped or paint-stencilled): manufacturer’s name or trademark · A106 A / A106 B / A106 C · hydrostatic test pressure or NDE (or “NH” if neither) · size, length and weight per foot (NPS 4 and above) · schedule number or wall thickness · heat number · manufacturing process · suffix “S” where supplementary requirements are tested.
- Sample: ASME B36.10 A106 GR B 12″ NB SCH 40 PIPE SEAMLESS HEAT NO. XXXX
- Packing: bundled with steel strapping, or wooden cases and pallets; standard export seaworthy packing with end caps and rust protection.
- Documents supplied: EN 10204 3.1 / 3.2 mill test certificate · commercial invoice with HS code · packing list · certificate of origin (Chamber of Commerce / Embassy attested) · Quality Assurance Plan · raw material test reports and traceability records · NACE certificates where specified. Third-party inspection at the mill is welcomed.
Applications of Carbon Steel ASTM A106 Grade B Pipe
- Oil refineries and gas processing plants
- Petrochemical and specialty chemical processing
- Power generation — thermal, nuclear and fossil fuel
- Boilers, superheaters, economisers and pressure vessels
- Heat exchangers and condensers
- Oil & gas transmission pipelines and offshore drilling
- Shipbuilding and marine
- Pulp, paper and sugar plants
- Water and mineral slurry transmission
Why A106 Gr B is specified: high tensile strength relative to welded alternatives, qualifying it for high-pressure service · strong resistance to shock and vibration · excellent weldability · available with FBE, 3LPE and galvanised coatings where corrosion protection is needed · cost-effective, since even thinner walls carry substantial pressure.
Frequently Asked Questions — ASTM A106 Grade B Pipe
1. What is ASTM A106 Grade B pipe?
2. What is the difference between ASTM A106 Grade B and ASTM A53 Grade B?
3. Is ASTM A106 Gr B equivalent to API 5L Grade B?
4. What is the temperature limit of ASTM A106 Grade B pipe?
5. What sizes and schedules are available in A106 Gr B pipe?
6. What is the price of ASTM A106 Grade B pipe?
7. Can A106 Grade B pipe be welded?
8. What certification is supplied with your A106 Gr B pipe?
Countries We Export ASTM A106 Grade B Pipe To
Jade Alloys supplies ASTM A106 Grade B Pipes to customers worldwide, with strong export capabilities and sales support across major industrial markets.
Get a Quote for Carbon Steel ASTM A106 Grade B Pipe
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