Boiler Tubes Supplier – Carbon & Alloy Steel Boiler Tubing
We supply boiler tubes in every common grade – carbon steel ASTM A178, A179, A192, A210 and A214, alloy steel ASTM A213 T11, T22, T91, T92 and more, and BS 3059 – as seamless, ERW and U-bent tubes, with IBR certification available. All sizes are supplied, cut to length, with mill test certificates and export packing.
What Are Boiler Tubes?
Boiler tubes are seamless or welded steel tubes that carry water, steam or hot gases inside a boiler, economiser, superheater or reheater. Because they work under high pressure and temperature, they are made to dedicated specifications (ASTM/ASME, BS, EN) that control chemistry, strength and testing. The grade is chosen by the metal temperature and pressure of each boiler section: carbon steel for lower-temperature parts, chromium-molybdenum alloy steel for superheaters and reheaters.
In a water-tube boiler water flows inside the tubes and hot gases outside – used for power plants and high-pressure industrial boilers. In a fire-tube boiler hot gases pass through the tubes inside a water shell – used for lower-pressure heating and process steam.
Boiler Tube Grades We Supply
| Type | Grade / specification | Manufacture | Typical use |
| Carbon steel – ERW | ASTM A178 / SA178 (Gr A, C, D) | ERW | Water walls, economisers, fire-tube boilers |
| Carbon steel – low carbon | ASTM A179 / SA179 | Seamless, cold drawn | Heat exchangers, condensers, low-pressure boilers |
| Carbon steel – high pressure | ASTM A192 / SA192 | Seamless | High-pressure boiler tubes, water walls |
| Carbon steel – medium carbon | ASTM A210 Grade A-1 · Grade C | Seamless | Boiler, superheater and economiser tubes |
| Carbon steel – heat exchanger | ASTM A214 / SA214 | ERW | Heat exchangers and condensers |
| Alloy steel (Cr-Mo) | T1, T2, T11, T12, T22, T23 | Seamless (ASTM A213 / SA213) | Superheaters, reheaters, headers |
| High-Cr alloy steel | T9, T91, T92 | Seamless (ASTM A213 / SA213) | High-temperature superheaters and reheaters |
| British standard | BS 3059 Grade 320 · Part 1 · Part 2 | Seamless / ERW | Boiler and superheater tubes to BS |
| European | EN 10216-2 P235GH, P265GH, 16Mo3, 13CrMo4-5 | Seamless | Pressure parts and boilers (replaces DIN 17175 St35.8 / St45.8) |
Click a grade for its full composition, properties and size range.
Carbon Steel Boiler Tubes
Carbon steel boiler tubes are used where metal temperatures stay below roughly 425–450 °C – water walls, economisers, low-temperature superheaters and heat exchangers. A179 is a soft, cold-drawn tube for heat exchangers; A192 is its high-pressure boiler equivalent; A210 A-1 and A210 C add more carbon and manganese for higher strength; A178 and A214 are economical ERW options.
Alloy Steel Boiler Tubes (ASTM A213)
For superheaters and reheaters, chromium-molybdenum alloy steel boiler tubes to ASTM A213 / ASME SA213 keep their strength and resist oxidation at higher temperatures. T11 (1¼Cr-½Mo) and T22 (2¼Cr-1Mo) are the workhorse grades; T91 and T92 (9Cr) are creep-strength-enhanced grades for the hottest sections of modern power plants.
BS 3059 Boiler Tubes
We also supply BS 3059 Grade 320, BS 3059 Part 1 (low-tensile carbon steel) and BS 3059 Part 2 (carbon, Cr-Mo and austenitic steels for high-temperature service).
Boiler Tube Sizes & Types
| Item | Range |
| Outside diameter | All sizes – from small-bore heat-exchanger tube to large-bore boiler tube |
| Wall thickness | All standard and heavy walls, specified as minimum or average wall |
| Length | Random, fixed, cut-to-length and long lengths |
| Types | Seamless (hot finished and cold drawn), ERW, U-bent |
| Ends | Plain, bevelled |
| Certification | IBR (Indian Boiler Regulations), EN 10204 3.1 / 3.2, third-party inspection |
Boiler tubes are ordered by outside diameter × wall thickness (not by pipe schedule). Send your size list and we will quote the matching grade.
How to Choose the Right Boiler Tube Grade
| Boiler section | Typical metal temperature | Usual grades |
| Economiser | Below ≈ 400 °C | A178, A192, A210 A-1, BS 3059 Part 1 |
| Water wall / furnace | ≈ 350 – 450 °C | A192, A210 A-1 / C, T11 |
| Low-temperature superheater | ≈ 450 – 540 °C | A210 C, T11, T12 |
| High-temperature superheater / reheater | ≈ 540 – 600 °C | T22, T23 |
| Final superheater (ultra-supercritical) | ≈ 600 – 620 °C+ | T91, T92, austenitic grades |
| Heat exchanger / condenser | Low | A179, A214 |
Temperatures are typical guidance only – the design code and stress calculations decide the grade. Our team can help match grade to pressure and temperature.
Mechanical Properties of Common Boiler Tube Grades
| Grade | Tensile strength, min (MPa) | Yield strength, min (MPa) | Hardness, max |
| A179 | 325 | 180 | 72 HRB |
| A192 | 325 | 180 | 77 HRB |
| A210 A-1 | 415 | 255 | 79 HRB |
| A210 C | 485 | 275 | 89 HRB |
| A213 T11 | 415 | 205 | 163 HB |
| A213 T22 | 415 | 205 | 163 HB |
| A213 T91 | 585 | 415 | 250 HB |
Minimum values per the ASTM specifications; see each grade page for elongation and test details.
Chemical Composition of Common Boiler Tube Grades
| Grade | C | Mn | Si | Cr | Mo | Other |
| A179 | 0.06 – 0.18 | 0.27 – 0.63 | — | — | — | P ≤ 0.035, S ≤ 0.035 |
| A192 | 0.06 – 0.18 | 0.27 – 0.63 | ≤ 0.25 | — | — | P ≤ 0.035, S ≤ 0.035 |
| A210 A-1 | ≤ 0.27 | ≤ 0.93 | ≥ 0.10 | — | — | P ≤ 0.035, S ≤ 0.035 |
| A210 C | ≤ 0.35 | 0.29 – 1.06 | ≥ 0.10 | — | — | P ≤ 0.035, S ≤ 0.035 |
| T11 | 0.05 – 0.15 | 0.30 – 0.60 | 0.50 – 1.00 | 1.00 – 1.50 | 0.44 – 0.65 | — |
| T22 | 0.05 – 0.15 | 0.30 – 0.60 | ≤ 0.50 | 1.90 – 2.60 | 0.87 – 1.13 | — |
| T91 | 0.07 – 0.14 | 0.30 – 0.60 | 0.20 – 0.50 | 8.0 – 9.5 | 0.85 – 1.05 | V 0.18 – 0.25, Nb 0.06 – 0.10, N 0.030 – 0.070 |
Wt %, per ASTM A179, A192, A210 and A213.
Testing & Certification
| Test / document | Details |
| IBR certification | Boiler tubes certified under the Indian Boiler Regulations (Form III-A / III-B) on request |
| Hydrostatic or NDT | Hydro test, or eddy-current / ultrasonic testing as per specification |
| Mechanical tests | Tensile, flattening, flaring, flange and hardness tests |
| Chemical analysis | Heat and product analysis; PMI on alloy grades |
| Certificates | EN 10204 3.1 / 3.2; third-party inspection (TÜV, BV, Lloyd’s, SGS etc.) on request |
Applications of Boiler Tubes
- Thermal and utility power plants: water walls, economisers, superheaters and reheaters.
- Industrial boilers and HRSGs: refineries, petrochemical, sugar, paper and textile plants.
- Heat exchangers and condensers: A179 and A214 tubes, including U-bent tube bundles.
- Fire-tube and package boilers: heating and process steam.
- Marine boilers.
Boiler Tube Guides
Why we are the trusted suppliers of Boiler Tubes?
- One source for every grade: carbon, alloy and BS boiler tubes, plus matching A335 alloy pipes and A106 pipes for headers and piping.
- IBR and third-party certification available for boiler-code projects.
- All sizes – seamless, ERW and U-bent, cut to length.
- Export-ready: marked, capped and bundled tubes with full traceability.
Frequently Asked Questions – Boiler Tubes
What are boiler tubes made of?
Boiler tubes are made of carbon steel (ASTM A178, A179, A192, A210) for lower-temperature sections, and chromium-molybdenum alloy steel (ASTM A213 T11, T22, T91, T92) for superheaters and reheaters. The grade depends on operating temperature and pressure.
What is the difference between A179 and A192 boiler tubes?
Both are seamless low-carbon steel tubes with similar chemistry. A179 is cold drawn for heat exchangers and condensers, while A192 is intended for high-pressure boiler service.
Which boiler tube grade is used for superheaters?
Low-temperature superheaters commonly use A210 C or T11; higher-temperature superheaters and reheaters use T22, T91 or T92 depending on metal temperature.
What is the difference between seamless and ERW boiler tubes?
Seamless tubes have no weld and are used for high-pressure service (A192, A210, A213). ERW tubes (A178, A214) are welded from strip and are an economical choice for lower-pressure boilers, economisers and heat exchangers.
Do you supply IBR-certified boiler tubes?
Yes. ASC LLP supplies boiler tubes with IBR certification as well as EN 10204 3.1 / 3.2 certificates and third-party inspection on request.
Are U-bent boiler and heat exchanger tubes available?
Yes. We supply U-bent tubes in A179, A214, A213 and other grades to drawing.
Global Reach
ASC LLP supplies boiler tubes to power plants, boiler makers and EPC contractors across India and worldwide, with prompt delivery and full documentation. Customers in the Middle East, Africa, Asia, Europe and the USA rely on our boiler tubes for certified quality and traceability.
Countries We Export To
UNITED STATES, EUROPE, UK, UAE, SAUDI ARABIA, OMAN, KUWAIT, JORDAN, QATAR, INDONESIA, MALAYSIA, BRAZIL, SPAIN, ITALY, FRANCE, GERMANY, BAHRAIN, SRI LANKA, AZERBAIJAN, AUSTRALIA, AUSTRIA, PHILIPPINES, TURKEY, RUSSIA, IRAN, IRAQ, CANADA, KOREA, JAPAN, YEMEN, FINLAND, ZIMBABWE, HUNGARY, PORTUGAL, VIETNAM, MOROCCO, THAILAND, SOUTH AFRICA, MEXICO, SINGAPORE, GREECE, KUWAIT, POLAND, NEW ZEALAND, SWEDEN, SWITZERLAND, BELGIUM, BHUTAN, BANGLADESH, TAIWAN, ROMANIA, CAMBODIA, KAZAKHSTAN, AFGHANISTAN.
