Carbon Steel Boiler Tubes Manufacturer in India
Carbon Steel Boiler Tubes Manufacturer in India
Sachiya Steel International is a leading Carbon Steel Boiler Tubes Manufacturer in India, supplying tubes for boilers, economisers, superheaters, steam systems, and heat recovery equipment. We manufacture and supply carbon steel boiler tubes in different sizes, wall thicknesses, and grades to meet the requirements of high-temperature and pressure applications. Common specifications include ASTM A178, ASTM A192, ASTM A210, and EN 10216-2, with seamless and welded options available according to the application.
Our focus goes beyond supplying the tube. We manage cutting, end preparation, testing, inspection, and documentation to keep each order aligned with the required specification. With 20+ years of experience, manufacturing and supply capacity of up to 100 tons per month, and export reach covering 85+ countries, we handle both regular requirements and project orders with suitable packing, material certificates, and inspection records.
What Are Carbon Steel Boiler Tubes?
Carbon steel boiler tubes are steel tubes used inside boilers to transfer heat and carry water, steam, or hot gases during operation. They form an important part of equipment such as water-tube boilers, fire-tube boilers, economisers, and superheaters, where the tubes must handle elevated temperatures and pressure.
These tubes are made from carbon steel grades selected for their strength, heat resistance, weldability, and ability to withstand repeated heating and cooling. Common specifications include ASTM A178, ASTM A192, and ASTM A210, with the appropriate grade depending on the boiler design and operating conditions. Tube dimensions, wall thickness, surface condition, and testing also need to match the applicable standard before installation.
Carbon Steel Boiler Tubes
High-quality Carbon Steel Boiler Tubes manufactured for demanding applications across power generation, boilers, heat exchangers, petrochemical, refinery and engineering industries. Available in multiple grades, sizes, wall thicknesses and manufacturing specifications.
Types of Carbon Steel Boiler Tubes
Carbon steel boiler tubes differ mainly by their construction, application, and the part of the boiler where they are installed. Each type has a specific role in moving heat, water, or steam through the system.
- Seamless Boiler Tubes: Made without a welded seam and commonly used where tubes face high temperature and pressure.
- Welded Boiler Tubes: Produced by forming and welding steel strip, offering a practical option for suitable boiler and heating applications.
- Water Tube Boiler Tubes: Carry water or steam inside the tubes while hot gases flow around them, allowing efficient heat transfer.
- Fire Tube Boiler Tubes: Hot gases pass through the tubes while water surrounds them inside the boiler.
- Economiser Tubes: Recover heat from exhaust gases to preheat boiler feedwater before it enters the main heating section.
- Superheater Tubes: Carry steam through a heated section to raise its temperature above the saturation point.
- Boiler Bank Tubes: Form part of the main heating surface and transfer heat between combustion gases and the water-steam circuit.
Our experience as a Carbon Steel Boiler Tubes Manufacturer allows us to supply different tube types, grades, sizes, and wall thicknesses according to boiler design and applicable standards.
ASTM A192 Boiler Tubes, ASTM A210 Boiler and Superheater Tubes, ASTM A178 ERW Boiler Tubes, Economiser Tubes, Water Wall Tubes, Fire Tubes, Carbon Steel Boiler Tubes Manufacturers and Suppliers in India
We are one of the carbon steel boiler tubes manufacturers in India that boiler makers and plant teams call when a shutdown has a fixed end date. We keep popular sizes in stock and draw other sizes to order.
For high-pressure water walls and boiler banks, our seamless ASTM A192 tubes carry the load. For stronger duty, such as economisers and low temperature superheaters, our ASTM A210 tubes in Gr. A-1 and Gr. C step in. For lower-pressure parts, such as fire tubes, smoke tubes, and air heaters, our ASTM A178 ERW tubes do the job at a lower price.
As a carbon steel boiler tubes supplier, we prepare the tube for fitting. We cut each tube to length, square and bevel the ends, swage and bend where your drawing asks, oil the surface, and cap the ends. Every tube carries a heat number that ties to its test certificate, so your inspector can trace it from the mill to the boiler.
Types of Pipes & Tubes
Explore our range of industrial pipes and tubes, manufactured for different applications, materials, specifications and engineering requirements.
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→Get Certified Carbon Steel Boiler Tubes at Competitive Factory Prices
Carbon Steel Boiler Tubes Specification
| Parameter | Details |
|---|---|
| Size Range | 3/4" to 6" OD (19.05 mm to 152.4 mm) |
| Wall Thickness | 2.0 mm to 10 mm |
| Process | Seamless (hot finished or cold drawn), ERW |
| Grades | ASTM A192, A210 Gr. A-1 / C, A178 Gr. A / C / D, EN 10216-2 P235GH / P265GH, DIN 17175 St 35.8 / St 45.8, JIS G3461 STB 340 / 410 |
| Delivery Condition | Normalized, stress relieved, cold drawn and annealed |
| Length | 6 m, 9 m, 12 m, random, exact cut lengths |
| Fabrication | Bending, swaging, end forming, cutting to length |
| Surface Finish | Black, oiled, varnished |
| End Finish | Plain end, square cut, bevelled, capped |
| Testing | Hydrostatic, eddy current, flattening, flaring, flange test, hardness, tensile, PMI |
| Certificate | EN 10204 3.1 (3.2 on request) |
Carbon Steel Boiler Tube Standards and Specifications
| Use | Standard |
|---|---|
| Seamless High-Pressure Boiler Tubes | ASTM A192 / ASME SA192 |
| Seamless Boiler and Superheater Tubes | ASTM A210 / ASME SA210 |
| ERW Boiler and Superheater Tubes | ASTM A178 / ASME SA178 |
| General Requirements | ASTM A450 |
| European Seamless Tubes (Elevated Temperature) | EN 10216-2 |
| European Welded Tubes (Elevated Temperature) | EN 10217-2 |
| German Standard | DIN 17175 |
| British Standard | BS 3059 Part 1 and Part 2 |
| Japanese Standard | JIS G3461 |
| Indian Standard | IS 1914 |
| Boiler and Pressure Vessel Code | ASME Section I, II, VIII |
| Certificate | EN 10204 3.1 and 3.2 |
Carbon Steel Boiler Tubes Material and Grades
| Duty | Grades | UNS / Material No. | Standard |
|---|---|---|---|
| Seamless High-Pressure Boiler Tube | A192 | K01201 | ASTM A192 |
| Seamless Boiler and Superheater Tube | A210 Gr. A-1 / Gr. C | K02707 / K03501 | ASTM A210 |
| ERW Boiler and Superheater Tube | A178 Gr. A / C / D | K01200 / K03503 / K02709 | ASTM A178 |
| European Boiler Tube | P235GH / P265GH | 1.0345 / 1.0425 | EN 10216-2 |
| German Boiler Tube | St 35.8 / St 45.8 | 1.0305 / 1.0405 | DIN 17175 |
| Japanese Boiler Tube | STB 340 / STB 410 | – | JIS G3461 |
What Is the Difference Between ASTM A192, A210 and A178 Carbon Steel Boiler Tubes?
The difference is the process and the strength. ASTM A192 is a seamless, low carbon tube for high-pressure boilers. ASTM A210 is also seamless but carries more carbon and manganese, so it is stronger, with Gr. C the strongest. ASTM A178 is an ERW tube, so it carries a welded seam and costs less.
Choose A192 for high-pressure water walls and boiler banks that need soft, ductile tubes. Choose A210 when the tube carries higher loads, such as economisers and low temperature superheaters. Choose A178 for lower-pressure parts like fire tubes and air heaters.
| Point | ASTM A192 | ASTM A210 Gr. A-1 / Gr. C | ASTM A178 Gr. A / C / D |
|---|---|---|---|
| Process | Seamless | Seamless | ERW (welded) |
| Carbon Level | Low (up to 0.18%) | Medium (0.27% / 0.35%) | Low to medium (0.18% / 0.35% / 0.27%) |
| Min. Tensile ksi (MPa) | 47 (325) | 60 (415) / 70 (485) | 47 (325) / 60 (415) / 70 (485) |
| Min. Yield ksi (MPa) | 26 (180) | 37 (255) / 40 (275) | 26 (180) / 37 (255) / 40 (275) |
| Max Hardness | 77 HRB | 79 HRB / 89 HRB | 77 HRB (Gr. A) |
| Pressure Duty | High | High | Low to medium |
| Price | Higher | Higher | Lower |
| Typical Use | Water walls, boiler banks | Economisers, superheaters | Fire tubes, air heaters, low-pressure units |
Carbon Steel Boiler Tubes Chemical Composition
Chemistry controls strength, ductility, and weldability. Values are weight percent, maximum unless a range shows.
ASTM Boiler Tubes
| Grade | C | Mn | Si | P | S |
|---|---|---|---|---|---|
| A192 | 0.06–0.18 | 0.27–0.63 | 0.25 | 0.035 | 0.035 |
| A210 Gr. A-1 | 0.27 | 0.93 | 0.10 min | 0.035 | 0.035 |
| A210 Gr. C | 0.35 | 0.29–1.06 | 0.10 min | 0.035 | 0.035 |
| A178 Gr. A | 0.06–0.18 | 0.27–0.63 | – | 0.035 | 0.035 |
| A178 Gr. C | 0.35 | 0.80 | – | 0.035 | 0.035 |
| A178 Gr. D | 0.27 | 1.00 | 0.10 min | 0.035 | 0.035 |
European, German and Japanese Boiler Tubes
| Grade | C | Si | Mn | P | S |
|---|---|---|---|---|---|
| EN P235GH | 0.16 | 0.35 | 1.20 | 0.025 | 0.020 |
| EN P265GH | 0.20 | 0.40 | 0.80–1.40 | 0.025 | 0.020 |
| DIN St 35.8 | 0.17 | 0.10–0.35 | 0.40–0.80 | 0.040 | 0.040 |
| DIN St 45.8 | 0.21 | 0.10–0.35 | 0.40–1.20 | 0.040 | 0.040 |
| JIS STB 340 | 0.18 | 0.35 | 0.30–0.60 | 0.035 | 0.035 |
| JIS STB 410 | 0.32 | 0.35 | 0.30–0.80 | 0.035 | 0.035 |
Carbon Steel Boiler Tubes Mechanical Properties
Mechanical properties show how much load the tube carries before it stretches (yield) or breaks (tensile). Values are minimum unless marked max.
| Grade | Tensile Strength ksi (MPa) | Yield Strength ksi (MPa) | Elongation % | Hardness (max) |
|---|---|---|---|---|
| A192 | 47 (325) | 26 (180) | 35 | 77 HRB |
| A210 Gr. A-1 | 60 (415) | 37 (255) | 30 | 79 HRB |
| A210 Gr. C | 70 (485) | 40 (275) | 30 | 89 HRB |
| A178 Gr. A | 47 (325) | 26 (180) | 35 | 77 HRB |
| A178 Gr. C | 60 (415) | 37 (255) | 30 | – |
| A178 Gr. D | 70 (485) | 40 (275) | 30 | – |
| EN P235GH | 52–73 (360–500) | 34 (235) | 25 | – |
| EN P265GH | 59–83 (410–570) | 38 (265) | 23 | – |
| DIN St 35.8 | 52–70 (360–480) | 34 (235) | 25 | – |
| DIN St 45.8 | 59–77 (410–530) | 37 (255) | 21 | – |
| JIS STB 340 | 49 (340) | 25 (175) | 35 | – |
| JIS STB 410 | 59 (410) | 37 (255) | 25 | – |
Carbon Steel Boiler Tube Size and Weight Chart
Boiler tubes are ordered by outside diameter and wall thickness. The chart shows weight in kg per metre for carbon steel, with walls given in BWG gauge. A lower BWG means a thicker wall.
| OD in | OD mm | 12 BWG (2.77 mm) | 10 BWG (3.40 mm) | 8 BWG (4.19 mm) | 6 BWG (5.16 mm) | 1/4" (6.35 mm) |
|---|---|---|---|---|---|---|
| 1-1/2" | 38.10 | 2.413 | 2.909 | 3.504 | 4.191 | 4.972 |
| 1-3/4" | 44.50 | 2.850 | 3.446 | 4.165 | 5.006 | 5.974 |
| 2" | 50.80 | 3.281 | 3.974 | 4.816 | 5.807 | 6.960 |
| 2-1/4" | 57.15 | 3.715 | 4.507 | 5.472 | 6.615 | 7.955 |
| 2-1/2" | 63.50 | 4.148 | 5.039 | 6.128 | 7.424 | 8.949 |
| 3" | 76.20 | 5.016 | 6.104 | 7.440 | 9.040 | 10.938 |
| 3-1/2" | 88.90 | 5.883 | 7.169 | 8.753 | 10.656 | 12.927 |
| 4" | 101.60 | 6.751 | 8.233 | 10.065 | 12.272 | 14.915 |
To work out the weight of any size, use Weight (kg/m) = (OD − Wall) × Wall × 0.02466, with both values in mm.
Common Materials Used in Carbon Steel Boiler Tubes
Carbon steel boiler tubes are available in several standard grades, with the material selected according to boiler pressure, operating temperature, and service conditions.
ASTM A192: Low-carbon seamless tubes designed for high-pressure boiler applications.
ASTM A210: Grades A-1 and C contain higher carbon and manganese levels, providing greater strength for boiler and superheater service.
ASTM A178: Grades A, C, and D cover electric-resistance-welded boiler tubes.
EN 10216-2: Grades P235GH and P265GH are used for pressure and elevated-temperature applications.
DIN 17175: Grades St 35.8 and St 45.8 are used for high-temperature service.
JIS G3461: Grades STB 340 and STB 410 are used for boiler and heat exchanger tubes.
We supply these materials with the required grade, standard, dimensions, and delivery condition, and can provide minimum or average wall thickness according to the order specification. As Carbon Steel Boiler Tubes Suppliers, we also provide material test certificates and inspection documentation for proper traceability.
Available Sizes, Dimensions and Tolerances
We supply carbon steel boiler tubes from 3/4" to 6" OD, in walls from 2.0 mm to 10 mm. Boiler tubes do not use schedule numbers. You give the outside diameter and the wall thickness, and the standard sets how far each can vary. Always say whether your design uses the minimum wall or the average wall. ASTM A450 treats them differently, and boiler makers design to the minimum wall, so the difference changes the allowed pressure.
Standard lengths are 6 m, 9 m, and 12 m, plus random lengths and exact cut lengths. As a carbon steel boiler tubes supplier in India, we hold the common sizes in stock, subject to availability, and we bend, swage, and end-form tubes on request.
| Product | Available Sizes | Wall Thickness | Standard Lengths |
|---|---|---|---|
| ASTM A192 Seamless Tubes | 3/4" to 6" OD | 2.0 mm to 10 mm | 6 m / 9 m / 12 m / exact cut |
| ASTM A210 Seamless Tubes | 3/4" to 6" OD | 2.0 mm to 10 mm | 6 m / 9 m / 12 m / exact cut |
| ASTM A178 ERW Tubes | 3/4" to 4" OD | 2.0 mm to 6.3 mm | 6 m / 9 m / 12 m / exact cut |
| Bent and Swaged Tubes | 3/4" to 4" OD | 2.0 mm to 6.3 mm | Made to drawing |
Carbon Steel Boiler Tubes We Manufacture and Supply
Our range includes ASTM A192 seamless boiler tubes, ASTM A210 Grades A-1 and C boiler and superheater tubes, ASTM A178 ERW boiler tubes, along with EN 10216-2, DIN 17175, and IS 1914 tubes. We supply different tube forms for boiler and heat recovery equipment, including water wall tubes, boiler bank tubes, economiser tubes, low-temperature superheater tubes, fire tubes, smoke tubes, and air heater tubes.
We also handle bent tubes, swaged tubes, and cut-to-length tubes according to the equipment requirements. Each order can be supplied with the required markings, heat numbers, material test certificates, and inspection reports. With our capabilities as a Carbon Steel Boiler Tubes Manufacturer, we support standard sizes as well as project-specific tube requirements.
Applications of Carbon Steel Boiler Tubes
- Thermal Power Plant Boilers: Form water walls, boiler banks, and economisers.
- Captive and Industrial Power Plants: Raise steam for factories and process units.
- Sugar Mills and Distilleries: Serve bagasse-fired boilers.
- Paper, Textile, and Chemical Plants: Generate process steam.
- Waste Heat Recovery Boilers: Recover heat from furnaces, kilns, and gas turbines.
- Package and Fire Tube Boilers: Carry hot gas through a water-filled shell.
- Marine and Shipboard Boilers: Raise steam on ships.
- Boiler Retubing and Shutdown Maintenance: Replace worn tubes on a tight schedule.
Why Choose Us as Your Carbon Steel Boiler Tubes Manufacturer in India?
Boiler tube orders require the right material, accurate dimensions, reliable testing, and documentation that matches the applicable standard. With 20+ years of experience, we understand these requirements and can handle different boiler tube specifications, including ASTM A192, A210, A178, EN 10216-2, DIN 17175, and IS 1914. We can manufacture and supply up to 100 tons per month, with options for straight, bent, swaged, and cut-to-length tubes. Our team also supports bulk and project requirements with clear coordination from production through dispatch.
As a Carbon Steel Boiler Tubes Supplier in India, we focus on consistent material quality, traceability, and testing. Orders can include EN 10204 3.1 certificates, heat numbers, inspection reports, and required test records, while packing and shipping documents are prepared for the destination. We export to 85+ countries and are supported by ISO 9001:2015 and PED 2014/68/EU certifications, giving customers a structured supply process for both regular and project orders.
Countries We Export Carbon Steel Boiler Tubes To
We export carbon steel boiler tubes to 85+ countries, with packing prepared to protect the material during sea and air transportation. Our export supply covers boiler, superheater, economiser, and heat recovery requirements across major industrial markets.
Africa: South Africa, Nigeria, Egypt, Kenya, Algeria
Middle East: UAE, Saudi Arabia, Qatar, Kuwait, Oman, Bahrain
Asia Pacific: Singapore, Malaysia, Indonesia, Thailand, Vietnam, Australia
Europe: UK, Germany, Italy, France, Netherlands, Spain
North America: United States, Canada, Mexico
South America: Brazil, Argentina, Chile, Peru, Colombia
Our Carbon Steel Boiler Tubes Suppliers network supports international orders with export packing, material documentation, shipping paperwork, and third-party inspection when required. We coordinate each shipment according to the destination, quantity, and project requirements.
Carbon Steel Boiler Tubes FAQs
Common questions about carbon steel boiler tube grades, sizes, standards, testing, and supply.
Which carbon steel boiler tube grade suits an economiser?
ASTM A210 Gr. A-1 and ASTM A178 are the usual choices, and ASTM A192 also works. The final choice depends on the pressure, the feed water quality, and your boiler design code.
Can carbon steel boiler tubes work in a superheater?
Yes, in low temperature superheaters where the tube metal stays below about 425°C. For hotter final superheaters, boiler makers move to chrome-moly tubes such as ASTM A213 T11 or T22.
How hot can carbon steel boiler tubes run?
For long service, designers normally keep the tube metal below about 425°C, because carbon steel can lose strength through graphitization when it stays hot for years.
Should I choose seamless or ERW boiler tubes?
Choose seamless ASTM A192 or A210 for high-pressure parts such as water walls and boiler banks. Choose ERW ASTM A178 for lower-pressure parts like fire tubes, smoke tubes, and air heaters.
Do carbon steel boiler tubes need IBR certification in India?
Tubes used in boilers governed by the Indian Boiler Regulations need IBR certification. Share your requirement with your enquiry, and we will confirm the certification route and documents.
Do you bend and swage boiler tubes?
Yes. We bend and swage tubes to your drawing and cut them to your length. Tell us if your code requires heat treatment after forming, and we will confirm the route.
What details should I send when I order boiler tubes?
Send the grade and standard, outside diameter, minimum or average wall, length, quantity, any bends or swages, end condition, and delivery port.
How should I store boiler tubes before fitting?
Store them dry, off the ground, with the end caps on. We oil the surface and cap the ends before dispatch, so the bore stays clean and rust-free until you fit the tubes.
What sizes do your carbon steel boiler tubes come in?
We supply boiler tubes from 3/4" to 6" OD, in walls from 2.0 mm to 10 mm. Other sizes are available on request.
What decides the price of carbon steel boiler tubes?
Steel price, grade, seamless or ERW process, size, wall thickness, bending, quantity, and delivery port all shape the price. Send us your enquiry for a current quote.
Which certificate comes with the tubes?
Every order ships with an EN 10204 3.1 certificate. We issue 3.2 with third-party inspection on request.
Are you a carbon steel boiler tubes manufacturer or a supplier?
Both. We manufacture the tubes and also work as a carbon steel boiler tubes supplier in India, with ready stock of popular sizes.
Do you export carbon steel boiler tubes?
Yes. We ship to 85+ countries and handle export packing and paperwork.