Carbon Steel Seamless Pipe Manufacturer in India
Carbon Steel Seamless Pipes Manufacturer in India
Stainless Steel Pipe Manufacturers is a leading carbon steel seamless pipes manufacturer in India, supplying pipes for oil & gas, petrochemical, power, construction, water, and engineering applications. Our range includes carbon steel seamless pipes in different grades, sizes, wall thicknesses, and lengths to suit pressure, temperature, and service requirements.
We manufacture and supply pipes to standards such as ASTM A106, ASTM A53, API 5L, ASTM A333, and ASTM A335, with grades selected according to the application. Pipes can be supplied with plain or beveled ends, different surface finishes, testing, marking, and inspection documentation. Supported by ISO and TÜV certifications, we supply carbon steel seamless pipes to customers across 85+ countries and handle regular, bulk, and project requirements.
What Are Carbon Steel Seamless Pipes?
A carbon steel seamless pipe is a hollow pipe with no weld, made from steel whose strength comes mainly from carbon and manganese. In the grades on this page, carbon runs from about 0.25% to 0.35%, and the steel carries no deliberate alloy additions such as chromium or nickel. Indian buyers also call these pipes MS seamless pipes, CS seamless pipes, or black seamless pipes.
The mill makes them by piercing a hot billet and rolling it into a pipe, so the wall has the same strength all the way around. That combination gives you a pipe that is tough, easy to weld, easy to bend and fabricate, and much cheaper than alloy or stainless steel pipe.
Carbon steel has two limits that every one should know. It rusts, so it needs paint, coating, or a corrosion allowance in the wall. It also has a working temperature window. For long service above roughly 425°C, the steel can slowly lose strength through graphitization, and below about -29°C, ordinary grades can turn brittle. Above that window, designers move to chrome-moly pipe, and below it they move to ASTM A333.
Carbon Steel Seamles Pipes
High-quality carbon steel seamless pipes manufactured for demanding applications across oil & gas, petrochemical, power generation, construction, water transmission and engineering industries. Available in multiple grades, sizes, wall thicknesses and manufacturing specifications.
Types of Carbon Steel Seamless Pipes
Carbon steel seamless pipes are available in different types depending on pressure, temperature, fluid, and the application. We manufacture and supply the following types for industrial and engineering requirements:
- Pressure Seamless Pipes: Used for steam, oil, gas, and fluid service under pressure.
- Line Pipes: Used to transport oil, gas, water, and other fluids through pipelines.
- Boiler and Heat Exchanger Pipes: Used in boilers, condensers, heat exchangers, and power equipment.
- Low-Temperature Pipes: ASTM A333 grades are suitable for applications where the pipe operates at low temperatures.
- Structural Seamless Pipes: Used for construction, mechanical equipment, supports, and general engineering.
- High-Temperature Pipes: Suitable grades are used in power plants and process equipment exposed to elevated temperatures.
With our experience as a carbon steel seamless pipes manufacturer, we supply these pipe types in different grades, sizes, wall thicknesses, and lengths according to the required standard and application.
ASTM A106 Gr. B Seamless Pipes, ASTM A53 Seamless Pipes, API 5L Seamless Line Pipes, ASTM A333 Low Temperature Pipes, Black and Galvanized Carbon Steel Pipes, Carbon Steel Seamless Pipes Manufacturers and Suppliers in India
We rank among the carbon steel seamless pipes manufacturers in India that buyers call when a shutdown date is fixed. Our yard near Mumbai holds popular sizes in SCH 40, SCH 80, and SCH 160, so a standard order can leave within days, and made-to-order pipes follow on a shorter lead time than most import routes.
For hot, high-pressure service, our ASTM A106 Gr. B and Gr. C pipes carry steam and process fluids in refineries and power plants. For general plant lines, ASTM A53 seamless pipes in black or galvanized finish cover water, air, and fire-fighting systems. When your project needs pipeline steel, our API 5L seamless line pipes in PSL1 and PSL2 run from Gr. B up to X70. For cold service, our ASTM A333 Gr. 6 pipes work down to -45°C, and Gr. 3 goes much lower.
As a carbon steel seamless pipes supplier, we treat the pipe and its paperwork as one product. Each length carries stencilled marks, a heat number that traces back to the mill test report, and a coating or protection level that matches your route to site.
Types of Pipes & Tubes
Explore our range of industrial pipes and tubes, manufactured for different applications, materials, specifications and engineering requirements.
Pipes and Tubes
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Seamless Pipes
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ERW Pipes
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LSAW Pipes
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SSAW Pipes
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Seamless Tubes
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Welded Pipes
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Welded Tubes
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Box Pipes
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Box Tubes
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Brass Pipes
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Heat Exchanger Tubes
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Boiler Tubes
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Aluminium Pipes
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Carbon Steel Seamless Pipes
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Carbon Steel Pipe
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Stainless Steel Pipe
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Alloy Steel Pipe
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Duplex Steel Pipe
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Super Duplex Steel Pipe
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Nickel Alloy Pipe
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Copper Nickel Alloy Pipe
→Get Certified Carbon Steel Seamless Pipes at Competitive Factory Prices
Carbon Steel Seamless Pipes Specification
Below is what we build to. Tell us if your job needs something outside these ranges, and we will confirm what the mill can do.
| Parameter | Details |
|---|---|
| Size Range | 1/8" to 24" NPS (10.3 mm to 610 mm OD) |
| Wall Thickness | SCH 10, 20, 30, STD, 40, 60, XS, 80, 100, 120, 140, 160, XXS, and custom |
| Process | Hot finished, cold drawn |
| Grades | ASTM A106 Gr. A / B / C, ASTM A53 Gr. A / B, API 5L Gr. B to X70, ASTM A333 Gr. 1 / 3 / 6 |
| Delivery Condition | As rolled, normalized, normalized and tempered, stress relieved |
| Length | Single random 16–22 ft, double random 36–40 ft, 6 m, 12 m, custom cut |
| End Finish | Plain end, bevelled end (30° or 37.5°), threaded, square cut |
| Surface Finish | Black, oiled, varnished, galvanized, 3LPE, FBE, epoxy, cement mortar lined |
| Testing | Hydrostatic, ultrasonic, eddy current, tensile, flattening, bend, hardness, Charpy impact (A333, PSL2) |
| Certificate | EN 10204 3.1 (3.2 on request) |
Carbon Steel Seamless Pipe Standards and Specifications
| Duty | Standard |
|---|---|
| High-Temperature Service | ASTM A106 / ASME SA106 |
| General Service | ASTM A53 (Type S, seamless), ASME SA53 |
| Pipeline (Oil, Gas, Water) | API 5L / ISO 3183, PSL1 and PSL2, IS 1978 |
| Low-Temperature Service | ASTM A333 / ASME SA333 |
| European | EN 10216-1, EN 10216-2 (P235GH, P265GH) |
| German | DIN 1629, DIN 17175 |
| Dimensions and Weights | ASME B36.10M, ASME B36.19M |
| Piping Design Codes | ASME B31.1, B31.3, B31.4, B31.8 |
| Sour Service | NACE MR0175 / ISO 15156, NACE TM0284 (HIC) |
| External Coating | ISO 21809-1 (3LPE, 3LPP), ISO 21809-2 (FBE) |
| General Requirements | ASTM A530, ASTM A999 |
Carbon Steel Seamless Pipes Material and Grades
| Family | Grades | UNS / Material No. | Standard |
|---|---|---|---|
| High-Temperature Pipe | Gr. A / B / C | K02501 / K03006 / K03501 | ASTM A106 |
| General Service Pipe | Gr. A / B | K02504 / K03005 | ASTM A53 |
| Line Pipe | Gr. B, X42, X46, X52, X56, X60, X65, X70 | – | API 5L |
| Low Temperature Pipe | Gr. 1 / Gr. 6 / Gr. 3 | K03008 / K03006 / K31918 | ASTM A333 |
| European Pressure Pipe | P235GH / P265GH | 1.0345 / 1.0425 | EN 10216-2 |
| German Pressure Pipe | St 35.8 / St 45.8 | 1.0305 / 1.0405 | DIN 17175 |
| German Structural Pipe | St 37.0 / St 44.0 / St 52.0 | 1.0254 / 1.0256 / 1.0421 | DIN 1629 |
Common Materials
Carbon steel is widely used for seamless pipes because it offers good strength, durability, weldability, and cost efficiency. Common grades include ASTM A106 Grade B, ASTM A53 Grade B, API 5L Grade B, X42, X52, and ASTM A333 Grade 6. Higher-strength grades can be selected when the application requires greater pressure or mechanical strength.
Low-temperature carbon steel grades such as ASTM A333 are used where impact toughness is important, while API 5L grades are commonly selected for pipeline applications. The suitable material depends on operating pressure, temperature, fluid, corrosion conditions, and the applicable design standard.
We work as carbon steel seamless pipes suppliers, providing different grades, sizes, wall thicknesses, lengths, and finishes according to project and application requirements.
What Is the Difference Between Carbon Steel, Alloy Steel and Stainless Steel Seamless Pipes?
The difference comes down to what is in the steel and what the pipe must survive. Carbon steel seamless pipes rely on carbon and manganese, so they are strong and cheap but they rust. Alloy steel seamless pipes add chromium and molybdenum, so they keep their strength at high temperature. Stainless steel seamless pipes carry at least 10.5% chromium, so they resist rust and chemicals but cost several times more per metre.
Pick carbon steel when the fluid is not corrosive and the temperature stays moderate. Pick alloy steel for hot steam and creep-prone service. Pick stainless steel when the fluid attacks carbon steel.
| Point | Carbon Steel | Alloy Steel | Stainless Steel |
|---|---|---|---|
| Main Elements | Iron, carbon, manganese | Iron, carbon, chromium, molybdenum | Iron, chromium, nickel |
| Strength at High Temperature | Good to about 425°C | Good to 600°C and above | Good, grade dependent |
| Low Temperature Use | A333 grades down to -101°C | Limited | Excellent |
| Corrosion Resistance | Low, needs coating | Moderate | High |
| Weldability | Very good | Good with preheat | Good |
| Cost | Lowest | Medium | Highest |
| Typical Standards | ASTM A106, A53, A333, API 5L | ASTM A335 | ASTM A312 |
| Best For | Steam, water, oil, gas, air lines | Superheaters, refinery furnaces | Chemicals, food, seawater |
Carbon Steel Seamless Pipes Chemical Composition
Chemistry controls strength and weldability. Values are weight percent, maximum unless a range shows.
ASTM A106, A53 and A333 Carbon Steel Seamless Pipes
| Grade | C | Mn | Si | P | S | Other |
|---|---|---|---|---|---|---|
| A106 Gr. A | 0.25 | 0.27–0.93 | 0.10 min | 0.035 | 0.035 | Cr 0.40, Cu 0.40, Mo 0.15, Ni 0.40, V 0.08 |
| A106 Gr. B | 0.30 | 0.29–1.06 | 0.10 min | 0.035 | 0.035 | Cr 0.40, Cu 0.40, Mo 0.15, Ni 0.40, V 0.08 |
| A106 Gr. C | 0.35 | 0.29–1.06 | 0.10 min | 0.035 | 0.035 | Cr 0.40, Cu 0.40, Mo 0.15, Ni 0.40, V 0.08 |
| A53 Gr. A | 0.25 | 0.95 | – | 0.05 | 0.045 | Cr 0.40, Cu 0.40, Mo 0.15, Ni 0.40, V 0.08 |
| A53 Gr. B | 0.30 | 1.20 | – | 0.05 | 0.045 | Cr 0.40, Cu 0.40, Mo 0.15, Ni 0.40, V 0.08 |
| A333 Gr. 1 | 0.30 | 0.40–1.06 | – | 0.025 | 0.025 | – |
| A333 Gr. 6 | 0.30 | 0.29–1.06 | 0.10 min | 0.025 | 0.025 | – |
| A333 Gr. 3 | 0.19 | 0.31–0.64 | 0.18–0.37 | 0.025 | 0.025 | Ni 3.18–3.82 |
API 5L Seamless Line Pipe
| Grade | Level | C | Si | Mn | P | S |
|---|---|---|---|---|---|---|
| B | PSL1 | 0.28 | – | 1.20 | 0.030 | 0.030 |
| B | PSL2 | 0.24 | 0.40 | 1.20 | 0.025 | 0.015 |
| X42 | PSL1 | 0.28 | – | 1.30 | 0.030 | 0.030 |
| X42 | PSL2 | 0.24 | 0.40 | 1.30 | 0.025 | 0.015 |
| X52 | PSL1 | 0.28 | – | 1.40 | 0.030 | 0.030 |
| X52 | PSL2 | 0.24 | 0.45 | 1.40 | 0.025 | 0.015 |
| X60 | PSL1 | 0.28 | – | 1.40 | 0.030 | 0.030 |
| X60 | PSL2 | 0.24 | 0.45 | 1.40 | 0.025 | 0.015 |
| X65 | PSL1 | 0.28 | – | 1.40 | 0.030 | 0.030 |
| X65 | PSL2 | 0.24 | 0.45 | 1.45 | 0.025 | 0.015 |
| X70 | PSL1 | 0.28 | – | 1.40 | 0.030 | 0.030 |
| X70 | PSL2 | 0.24 | 0.45 | 1.65 | 0.025 | 0.015 |
European Carbon Steel Pressure Pipes (EN 10216-2)
| Grade | C | Si | Mn | P | S |
|---|---|---|---|---|---|
| P235GH | 0.16 | 0.35 | 1.20 | 0.025 | 0.020 |
| P265GH | 0.20 | 0.40 | 0.80–1.40 | 0.025 | 0.020 |
For weld planning, engineers use the carbon equivalent: CE = C + Mn/6 + (Cr + Mo + V)/5 + (Ni + Cu)/15. A value under about 0.43 welds easily without preheat, and a higher value calls for preheat and slower cooling. Because Gr. C carries more carbon and manganese than Gr. A or B, it usually needs the most careful welding.
Carbon Steel Seamless Pipes Mechanical Properties
Mechanical properties show how much load the pipe carries before it stretches (yield) or breaks (tensile). Values are minimum.
| Grade | Tensile Strength ksi (MPa) | Yield Strength ksi (MPa) | Elongation % |
|---|---|---|---|
| A106 Gr. A | 48 (330) | 30 (205) | 35 |
| A106 Gr. B | 60 (415) | 35 (240) | 30 |
| A106 Gr. C | 70 (485) | 40 (275) | 30 |
| A53 Gr. A | 48 (330) | 30 (205) | Per ASTM formula |
| A53 Gr. B | 60 (415) | 35 (240) | Per ASTM formula |
| A333 Gr. 1 | 55 (380) | 30 (205) | 35 |
| A333 Gr. 6 | 60 (415) | 35 (240) | 30 |
| A333 Gr. 3 | 65 (450) | 35 (240) | 30 |
| API 5L Gr. B | 60.2 (415) | 35.5 (245) | Per API 5L formula |
| API 5L X42 | 60.3 (415) | 42.1 (290) | Per API 5L formula |
| API 5L X52 | 66.7 (460) | 52.2 (360) | Per API 5L formula |
| API 5L X60 | 75.4 (520) | 60.2 (415) | Per API 5L formula |
| API 5L X65 | 77.6 (535) | 65.3 (450) | Per API 5L formula |
| API 5L X70 | 82.7 (570) | 70.3 (485) | Per API 5L formula |
| EN P235GH | 52–73 (360–500) | 34 (235) | 25 |
| EN P265GH | 59–83 (410–570) | 38 (265) | 23 |
Carbon Steel Seamless Pipe Size and Weight Chart
The chart shows wall thickness in mm and weight in kg per metre for the four schedules buyers ask about most. Each cell reads "wall / weight". Dimensions follow ASME B36.10M.
| NPS | OD mm | SCH 40 | SCH 80 | SCH 160 | XXS |
|---|---|---|---|---|---|
| 1/2" | 21.3 | 2.77 / 1.27 | 3.73 / 1.62 | 4.78 / 1.95 | 7.47 / 2.55 |
| 3/4" | 26.7 | 2.87 / 1.69 | 3.91 / 2.20 | 5.56 / 2.90 | 7.82 / 3.64 |
| 1" | 33.4 | 3.38 / 2.50 | 4.55 / 3.24 | 6.35 / 4.24 | 9.09 / 5.45 |
| 1-1/4" | 42.2 | 3.56 / 3.39 | 4.85 / 4.47 | 6.35 / 5.61 | 9.70 / 7.77 |
| 1-1/2" | 48.3 | 3.68 / 4.05 | 5.08 / 5.41 | 7.14 / 7.25 | 10.15 / 9.55 |
| 2" | 60.3 | 3.91 / 5.44 | 5.54 / 7.48 | 8.74 / 11.11 | 11.07 / 13.44 |
| 2-1/2" | 73.0 | 5.16 / 8.63 | 7.01 / 11.41 | 9.53 / 14.92 | 14.02 / 20.39 |
| 3" | 88.9 | 5.49 / 11.29 | 7.62 / 15.27 | 11.13 / 21.35 | 15.24 / 27.68 |
| 4" | 114.3 | 6.02 / 16.07 | 8.56 / 22.32 | 13.49 / 33.54 | 17.12 / 41.03 |
| 6" | 168.3 | 7.11 / 28.26 | 10.97 / 42.56 | 18.26 / 67.56 | 21.95 / 79.22 |
| 8" | 219.1 | 8.18 / 42.55 | 12.70 / 64.64 | 23.01 / 111.27 | 22.23 / 107.92 |
To work out the weight of any size, use Weight (kg/m) = (OD − Wall) × Wall × 0.02466, with both values in mm. We supply larger sizes up to 24" NPS on request.
Available Sizes, Dimensions and Schedules
A schedule is a wall-thickness code, and the same schedule gives a different wall in mm for each pipe size. That is why a 2" SCH 40 pipe and a 6" SCH 40 pipe do not share one wall. The outside diameter stays fixed for each NPS, so a thicker wall shrinks the bore and raises the pressure the pipe can carry.
We roll carbon steel seamless pipes from 1/8" to 24" NPS. Standard lengths are single random (16–22 ft) and double random (36–40 ft), and we cut 6 m, 12 m, or any custom length. As a carbon steel seamless pipes supplier in India, we hold the common schedules in ready stock, subject to availability.
| Product | Available Sizes | Wall Thickness | Standard Lengths |
|---|---|---|---|
| ASTM A106 Seamless Pipes | 1/8" to 24" NPS | SCH 10 to XXS | Random / 6 m / 12 m / custom |
| ASTM A53 Seamless Pipes | 1/8" to 24" NPS | SCH 10 to XXS | Random / 6 m / 12 m / custom |
| API 5L Seamless Pipes | 1/2" to 24" NPS | SCH 10 to XXS | Random / 6 m / 12 m / custom |
| ASTM A333 Seamless Pipes | 1/2" to 24" NPS | SCH 10 to XXS | Random / 6 m / 12 m / custom |
| Cold Drawn Seamless Pipes | 1/4" to 6" OD | Thin to medium | 6 m / exact cut |
Carbon Steel Seamless Pipes We Manufacture and Supply
Our product range covers 1/8" to 24" outside diameter, suitable for small-bore piping, process lines, and large industrial headers. We produce pipes in ASTM A106 Grade A, B, and C, ASTM A53, API 5L PSL1 and PSL2, and ASTM A333 grades for different service conditions.
We also provide carbon steel boiler pipes, cold drawn seamless pipes, galvanized pipes, 3LPE and FBE coated pipes, and cement mortar lined pipes. Different finishing and fabrication options are available, including cutting, beveling, threading, and end preparation. Pipes can be supplied with the required inspection, testing, marking, and material documentation for industrial and project applications.
Applications of Carbon Steel Seamless Pipes
- Refineries and Petrochemical Plants: Carry hot hydrocarbons, steam, and utility fluids.
- Power Plants: Run main steam, feedwater, and blowdown lines.
- Oil and Gas Pipelines: Move crude, gas, and refined products with API 5L pipe.
- LNG and Cold Storage: Use A333 pipe for low temperature lines.
- Fertilizer and Chemical Plants: Serve non-corrosive process and utility piping.
- Fire-Fighting and Water Systems: Form hydrant, sprinkler, and cooling water networks.
- Shipbuilding and Offshore: Handle hydraulic, fuel, and cooling lines.
- Boilers and Heat Recovery Units: Feed steam and water to boiler drums and headers.
- Automotive, Mining and Machinery: Make hydraulic cylinders, rollers, and structural parts.
Why Choose Us as Your Carbon Steel Seamless Pipes Manufacturer in India?
With more than two decades of experience, we understand the manufacturing, inspection, documentation, and delivery requirements that come with carbon steel seamless pipe orders. Since 2005, we have been manufacturing and supplying pipes for oil & gas, petrochemical, power, construction, water, and engineering applications.
We supply 1/8" to 24" carbon steel seamless pipes in grades including ASTM A106 Grade A, B and C, ASTM A53, API 5L PSL1 and PSL2, and ASTM A333. Our monthly capacity reaches up to 100 tons, allowing us to handle both regular requirements and larger project orders.
As a carbon steel seamless pipes supplier in India, we focus on getting the details right from material selection and dimensions to testing, marking, certificates, packing, and delivery. We understand that buyers need pipes that match the specified grade, size, wall thickness, standard, and inspection requirements rather than simply a standard stock product.
Our experience extends to international orders, and we export carbon steel seamless pipes to 85+ countries. Orders can include EN 10204 3.1 certificates, third-party inspection, cutting, beveling, threading, coating, export packing, and the documentation required for the destination and project.
Countries We Export Carbon Steel Seamless Pipes To
We have exported carbon steel seamless pipes to 85+ countries, supplying different grades, sizes, standards, and specifications for industrial and project requirements. Our export experience covers major markets across North America, the Middle East, Europe, Asia Pacific, Africa, and South America.
North America: United States, Canada, Mexico
Middle East: United Arab Emirates, Saudi Arabia, Qatar, Kuwait, Oman, Bahrain
Europe: United Kingdom, Germany, France, Italy, Netherlands, Spain
Asia Pacific: Australia, Singapore, Malaysia, Indonesia, Thailand, Vietnam
Africa: South Africa, Egypt, Nigeria, Kenya, Algeria
South America: Brazil, Argentina, Chile, Peru, Colombia
As a carbon steel seamless pipes exporter, we handle international orders with suitable product documentation, inspection records, material certificates, export packing, and shipping paperwork according to the requirements of each order and destination.
Carbon Steel Seamless Pipes FAQs
Common questions about carbon steel seamless pipe grades, sizes, schedules, testing, and supply.
Which carbon steel seamless pipe grade is used the most?
ASTM A106 Gr. B leads because it balances strength, weldability, and price for steam, oil, and process lines up to high temperature.
What is the difference between ASTM A106 and ASTM A53 seamless pipes?
ASTM A106 covers only seamless pipe and is made for high-temperature service, with a minimum silicon content. ASTM A53 covers seamless and welded pipe for general service, so it suits water, air, and low-pressure lines.
How does ASTM A106 Gr. B differ from API 5L Gr. B?
The two grades have similar strength. A106 is written for high-temperature plant piping, and API 5L is written for pipelines, with PSL2 adding tighter chemistry and toughness tests.
What temperature can carbon steel seamless pipe handle?
Carbon steel works well up to about 425°C for long service and down to about -29°C for ordinary grades. Below that, use ASTM A333, and above that, use chrome-moly alloy steel pipe.
Do carbon steel seamless pipes rust?
Yes. Carbon steel rusts in air and water, so we supply pipes with oil, varnish, galvanizing, or 3LPE, FBE, and epoxy coatings depending on the service.
What is the difference between SCH 40 and SCH 80 pipe?
SCH 80 has a thicker wall than SCH 40 for the same NPS, so it carries higher pressure but weighs more and has a smaller bore.
What is the difference between carbon steel seamless and ERW pipes?
Seamless pipes have no weld and suit higher pressure and temperature. ERW pipes have one welded seam, cost less, and suit water, gas, and structural work.
What sizes do your carbon steel seamless pipes come in?
We supply pipes from 1/8" to 24" NPS in schedules from SCH 10 to XXS, plus custom walls on request.
Which certificate comes with the pipes?
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 seamless pipes manufacturer or a supplier?
Both. We manufacture the pipes and also work as a carbon steel seamless pipes supplier in India, with ready stock of popular sizes.