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Grade B (most stocked)
Grade A & Grade C available on order
EN 10204 3.1 / 3.2
Third-party inspection on request
1/2″ – 24″ NPS
Larger diameters on special request
Hot Finished & Cold Drawn
Seamless construction, no weld seam
SCH 10 – SCH 160 / XXS
Every wall thickness, ready to cut
ASTM A106 / ASME SA106
UNS K03006, seamless only
Full Size Matrix
1/2″ to 24″ NPS, all schedules in stock
Mill-Traceable Stock
Every heat number logged and verifiable
No Minimum Order
Single length or full container, same service
Pan-India Dispatch
Same-week delivery from regional warehouses
Batch Test Reports
Chemical & mechanical data on every lot
Dedicated Account Support
One point of contact from quote to delivery
📌 Table of Contents
Boiler headers and high-pressure steam lines leave no room for a weld seam, which is exactly why ASTM A106 Grade B remains the first choice on most engineering specs. Aesteiron Steels LLP maintains ready ex-stock inventory of SA106 Grade B seamless pipe spanning every NPS and schedule, sourced directly from established seamless mills, with a mill test certificate accompanying every heat number.
Every length carries dual certification to ASTM A106 and ASME SA106 standards, undergoes hydrostatic testing and PMI verification prior to dispatch, and moves through regional stock points serving the Middle East, Africa and the Americas – keeping lead times short no matter which port it's headed to.
Stock supply is only part of the offering. Our metallurgical team also assists with grade selection, NACE MR0175 sour-service compliance, plus cutting, beveling and threading services – consolidating what would normally take three separate vendors into a single purchase order for one boiler pipe requirement.
Quick-reference specification for SA106 Grade B seamless pipe as held in our Mumbai stockyard.
All variants share the same ASTM A106 Grade B chemistry and strength, differing only in finish, wall thickness, or manufacturing route.
Share your NPS, schedule and required quantity – we'll confirm pricing within 2 business hours.
Maximum permissible chemical composition by heat analysis, in percentage by weight.
| Element | Symbol | Limit (%) |
|---|---|---|
| Molybdenum | Mo | 0.15 max |
| Sulfur | S | 0.035 max |
| Chromium | Cr | 0.40 max |
| Carbon | C | 0.30 max |
| Cr+Cu+Mo+Ni+V (total) | — | 1.00 max |
| Nickel | Ni | 0.40 max |
| Silicon | Si | 0.10 min |
| Vanadium | V | 0.08 max |
| Manganese | Mn | 0.29 – 1.06 |
| Copper | Cu | 0.40 max |
| Phosphorus | P | 0.035 max |
Trusted ASTM A106 Grade B Pipe Exporter in India verifying tensile and yield strength on every batch.
Outside diameter and wall thickness by schedule, in millimeters, per ASME B36.10M.
| NB (mm) | Size | OD (mm) | S160 | S140 | S120 | S100 | S80 | XS/80S | S60 | S40 | S20 | S10 | 10S | 5S | 40S |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 350 | 14″ | 355.6 | 35.7 | 31.8 | 27.8 | 23.8 | 19.1 | 12.7 | 15.1 | 11.1 | 7.9 | 6.4 | 4.8 | 4 | 9.5 |
| 65 | 2 1/2″ | 73.03 | 9.53 | – | – | – | 7.01 | 7.01 | – | 5.16 | – | – | 3.1 | 2.1 | 5.2 |
| 800 | 32″ | 812.8 | – | – | – | – | – | 12.7 | – | 17.5 | 13 | 7.9 | – | – | 9.5 |
| 15 | 1/2″ | 21.34 | 4.78 | – | – | – | 3.73 | 3.73 | – | 2.77 | – | – | 2.1 | 1.7 | 2.8 |
| 500 | 20″ | 508 | 50 | 44.5 | 38.1 | 32.5 | 26.2 | 12.7 | 20.6 | 15.1 | 9.5 | 6.4 | 5.5 | 4.8 | 9.5 |
| 100 | 4″ | 114.3 | 13.5 | – | 11.1 | – | 8.56 | 8.56 | – | 6.02 | – | – | 3.1 | 2.1 | 6 |
| 200 | 8″ | 219.1 | 23 | 20.6 | 19.3 | 15.1 | 12.7 | 12.7 | 10.3 | 8.18 | 6.4 | – | 3.8 | 2.8 | 8.2 |
| 40 | 1 1/2″ | 48.26 | 7.14 | – | – | – | 5.08 | 5.08 | – | 3.68 | – | – | 2.8 | 1.7 | 3.7 |
| 900 | 36″ | 914.4 | – | – | – | – | – | 12.7 | – | 19.1 | 13 | 7.9 | – | – | 9.5 |
| 600 | 24″ | 609.6 | 59.5 | 52.4 | 46 | 38.9 | 31 | 12.7 | 24.6 | 17.5 | 9.5 | 6.4 | 6.4 | 5.5 | 9.5 |
| 25 | 1″ | 33.4 | 6.35 | – | – | – | 4.55 | 4.55 | – | 3.38 | – | – | 2.8 | 1.7 | 3.4 |
| 750 | 30″ | 762 | – | – | – | – | – | 12.7 | – | – | 13 | 7.9 | 7.9 | 6.4 | 9.5 |
| 150 | 6″ | 168.3 | 18.3 | – | 14.3 | – | 11 | 10.97 | – | 7.11 | – | – | 3.4 | 2.8 | 7.1 |
| 90 | 3 1/2″ | 101.6 | – | – | – | – | 8.08 | 8.08 | – | 5.74 | – | – | 3.1 | 2.1 | 5.7 |
| 450 | 18″ | 457.2 | 45.2 | 39.7 | 34.9 | 29.4 | 23.8 | 12.7 | 19.1 | 14.3 | 7.9 | 6.4 | 4.8 | 4.2 | 9.5 |
| 300 | 12″ | 323.9 | 33.3 | 28.6 | 25.4 | 21.4 | 17.5 | 12.7 | 14.3 | 10.3 | 6.4 | – | 4.6 | 4 | 9.5 |
| 32 | 1 1/4″ | 42.16 | 6.35 | – | – | – | 4.85 | 4.85 | – | 3.56 | – | – | 2.8 | 1.7 | 3.6 |
| 650 | 26″ | 660.4 | – | – | – | – | – | 12.7 | – | – | 13 | 7.9 | – | – | 9.5 |
| 550 | 22″ | 558.8 | 54 | 47.6 | 41.3 | 34.9 | 28.6 | 12.7 | 22.2 | – | 9.5 | 6.4 | 5.5 | 4.8 | 9.5 |
| 20 | 3/4″ | 26.67 | 5.56 | – | – | – | 3.91 | 3.91 | – | 2.87 | – | – | 2.1 | 1.7 | 2.9 |
| 850 | 34″ | 863.6 | – | – | – | – | – | 12.7 | – | 17.5 | 13 | 7.9 | – | – | 9.5 |
| 250 | 10″ | 273.1 | 28.6 | 25.4 | 21.4 | 19.3 | 15.1 | 12.7 | 12.7 | 9.27 | 6.4 | – | 4.2 | 3.4 | 9.3 |
| 700 | 28″ | 711.2 | – | – | – | – | – | 12.7 | – | – | 13 | 7.9 | – | – | 9.5 |
| 80 | 3″ | 88.9 | 11.1 | – | – | – | 7.62 | 7.62 | – | 5.49 | – | – | 3.1 | 2.1 | 5.5 |
| 50 | 2″ | 60.33 | 9.74 | – | – | – | 5.54 | 5.54 | – | 3.91 | – | – | 2.8 | 1.7 | 3.9 |
| 400 | 16″ | 406.4 | 40.5 | 36.5 | 31 | 26.2 | 21.4 | 12.7 | 16.7 | 12.7 | 7.9 | 6.4 | 4.8 | 4.2 | 9.5 |
| 125 | 5″ | 141.3 | 15.9 | – | 12.7 | – | 9.53 | 9.53 | – | 6.55 | – | – | 3.4 | 2.8 | 6.6 |
Enter OD and wall thickness to get an instant estimated running weight.
Reputed ASTM A106 Grade B Pipe Stockist in Mumbai supplying pipe rated for high-pressure boiler service.
~1,396 psi (thin wall) up to ~4,569 psi (heavy wall)
~1,750 psi (thin wall) up to ~7,860 psi (heavy wall)
~2,199 psi (thin wall) up to ~6,807 psi (heavy wall)
~1,205 psi (thin wall) up to ~4,485 psi (heavy wall)
~2,736 psi (thin wall) up to ~8,607 psi (heavy wall)
~1,539 psi (thin wall) up to ~4,587 psi (heavy wall)
Recognized ASTM A106 Grade B Pipe Exporter in India qualifying stock for elevated temperature service.
The same grade is recognized worldwide under these regional designations.
A quick side-by-side look at how strength and composition shift across the three grades.
| Property | ASTM A106 Grade A Pipe | ASTM A106 Grade B Pipe | ASTM A106 Grade C Pipe |
|---|---|---|---|
| Stock Availability | Limited | Ex-stock, all sizes | Order basis |
| Yield Strength (min) | 205 MPa | 240 MPa | 275 MPa |
| Carbon (max) | 0.25% | 0.30% | 0.35% |
| Typical Duty | Low/medium pressure | Boiler & high pressure | Highest strength lines |
| Tensile Strength (min) | 330 MPa | 415 MPa | 485 MPa |
Trusted ASTM A106 Grade B Pipe Stockist in Mumbai holding ready stock across Schedule 40 and Schedule 80.
| NPS | OD (mm) | Schedule | WT (mm) | Approx. Wt (kg/m) |
|---|---|---|---|---|
| 8″ | 219.1 | SCH 40 | 8.18 | 42.55 |
| 4″ | 114.3 | SCH 80 | 8.56 | 22.32 |
| 2″ | 60.3 | SCH 40 | 3.91 | 5.44 |
| 12″ | 323.9 | SCH 40 | 9.53 | 73.88 |
| 6″ | 168.3 | SCH 40 | 7.11 | 28.26 |
| 10″ | 273.1 | SCH 40 | 9.27 | 60.31 |
| 2″ | 60.3 | SCH 80 | 5.54 | 7.48 |
| 4″ | 114.3 | SCH 40 | 6.02 | 16.07 |
Confirm the exact HSN code with your customs broker, as classification can vary.
We arrange witness testing through SGS, TUV, Bureau Veritas or Lloyd’s ahead of dispatch.
Dependable ASTM A106 Grade B Pipe Supplier in India offering galvanized and epoxy coated surface finishes.
Black Painted
3-Layer PE (3LPE)
Hot-Dip Galvanized
Bare / Oiled Finish
Varnish Coating
FBE Coating
Anti-Rust Oil Coating
Liquid Epoxy
Trusted ASTM A106 Grade B Pipe Supplier in India holding tolerance well within ASME B36.10M limits.
WT lower limit
Squareness of end
OD, NPS ≤ 2″
WT upper limit
OD, NPS > 2″
Every shipment is backed by documented proof, with independent checks when needed.
Standard certificate
Third-party witnessed
QMS certified mills
Indian Boiler Regulation
SGS / TUV / BV / Lloyd’s
How each length is prepped and cut, ready for the site or the next stage of fabrication.
Standard cut, square to axis
30° bevel, ready for butt-weld
NPT / BSPT on request, smaller NPS
Single 5–7m, Double 11–13m
Exact length cutting, mill length also available
Reputed ASTM A106 Grade B Pipe Supplier in India running hydrostatic, UT and RT testing routinely.
OD, WT, length check
Pressure held per code
Wall & lamination check
Surface flaw detection
Ductility confirmation
Chemistry & certificate
For pipelines carrying H₂S, standard chemistry isn't enough – hardness and composition need extra control to avoid cracking.
Restricted to NACE MR0175 / ISO 15156 limits to resist sulfide stress cracking
Tighter carbon & alloy limits than standard A106 Grade B heats
Supplementary hardness surveys and material verification on request
Hardness control, restricted chemistry and additional testing arranged for H₂S sour-service pipelines.
Same chemistry, same seamless build – the process shapes tolerance, finish and fit.
Countries We Deliver To Worldwide
Capable ASTM A106 Grade B Pipe Stockist in Mumbai keeping material weldable to standard SMAW and GTAW procedures.
Bevel cleaning, alignment and root gap set as per WPS.
Controlled penetration root run for a sound internal bead.
Multi-pass filling to full wall thickness with cap run.
Radiography or ultrasonic testing of the completed joint.
Applied where thickness or code requires stress relief.
Send it across and we'll match it to compatible A106 Grade B stock lengths.
Wherever a line has to hold heat and pressure without a weld seam, this is usually the pipe on the drawing.
Oil Refinery Process Lines
Petrochemical Plants
High-Temperature Steam Lines
Boiler Headers & Tubing
Cross-Country Process Piping
Power Plant Piping
Fertilizer & Chemical Processing
Industrial Heat Exchangers
Ex-stock and back-to-back sourcing from established A106 Grade B producers – carried as stockist, stocking distributor and supplier, not as a broker/dealer.
MSL
Tubacex Steel
Apollo Piping
Jindal
Schoeller Bleckmann
Ratnamani
Aesteiron maintains ready ex-stock inventory of ASTM A106 Grade B pipe, drawn from established seamless mills such as Maharashtra Seamless Ltd (MSL), ISMT Ltd, Jindal Saw, Tenaris, Vallourec and TMK, and functions as a stocking distributor and stockholder rather than a pass-through trading dealer across the regions listed below.
Regional Stocking Points – Middle East, Africa & the Americas
Ex-stock supply for West African power and refinery projects.
Support for oil & gas process piping upgrades.
Port-side handling for fast onward regional dispatch.
Boiler pipe supply for industrial and utility plants.
Mining and process plant piping requirements.
Growing demand from power and infrastructure projects.
Coastal and marine-adjacent industrial supply.
Caspian-region oil & gas process piping.
Refinery and petrochemical sector supply.
Power generation and industrial process lines.
Share your NPS, schedule, quantity and destination port, and we'll get back with pricing within 2 business hours.
Request A QuoteRecent A106 Grade B pipe orders executed for refineries, EPCs and process plants across the Middle East, Africa and USA.
6″ SCH 40, seamless, hydro-tested, EN 10204 3.1 MTC.
BP Refining & Petrochemicals GmbH
JEDDAH, SAUDI ARABIA8″ SCH 80, hot finished, PMI verified, third-party inspected.
Bouma CV
HOUSTON, USA4″ SCH 40, ASTM A106 Gr B, EN 10204 3.2 MTC.
Alca Petroleum
LAGOS, NIGERIA3″ SCH 80, beveled ends, PMI verified, SGS inspected.
Papiermakerij de Hoop
CAIRO, EGYPT10″ SCH 40, hydro-tested, EN 10204 3.1 MTC.
Holland Shipyards BV
JOHANNESBURG, SOUTH AFRICA12″ SCH 40, third-party witnessed, MTC on delivery.
Onda S.p.A. Plate Division
ADDIS ABABA, ETHIOPIABoiler, power plant and refinery piping requiring seamless, high-temperature service.
ASTM A106 Grade B seamless pipe is rated for high-temperature service, typically up to 800°F, making it suitable for process piping.
EN 10204 3.1 MTC as standard; 3.2 third-party certification on request.
Yes, with hardness control and added testing on request.
NPS, schedule, mill origin, certification, coating and order quantity.
Why Aesteiron?
Tools & Downloads
Conclusion
ASTM A106 Grade B seamless pipe, certified to ASME SA106 Grade B with full MTC 3.1/3.2 backup, remains the benchmark choice for boiler, power plant and high-temperature process piping. Buyers across the Middle East, Africa and the Americas trust Aesteiron Steels LLP as a responsive ASTM A106 Grade B Pipe Supplier for ex-stock sizes and fast quotes.
Quick form – quote in 2 hours.
