Size and Grade of Seamless Tubes
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Internal Diameter (ID) of Welded Tube 1/16” to 14 “ , wall thickness as per specification |
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Grades in Stainless Steel 300 Series of Welded Tubes 304 , 304L , 304H , 309S , 309H ,310S ,310S ,316L ,317L ,321 ,321H ,347, 347H |
Welded Tubes Manufacturer, Supplier & Exporter in India
Metal Forge India is one of the leading manufacturers, suppliers and exporters of welded , welded pipes in India offering a wide range of premium quality welded pipes specially designed for various , various industrial applications. We aim for precision durability and performance and manufacture welded pipes in various sizes and specifications to meet global standards.
Our products are made using premium raw materials and advanced welding technology to ensure exceptional strength, corrosion resistance and dimensional accuracy. You know what? Do you know we at Metal Forge believe in rigorous and rigorous quality control validated inspection tests and a customer-centric approach.
We have over the years developed a strong reputation in the domestic and international markets. Our network is very strong and hence delivers welded tubes to clients across the Middle East, Europe, Africa, and Asia. We guarantee on-time delivery and consistent product reliability. So whether it is oil & gas, construction, petrochemical, automotive, or structural applications, we at Metal Forge India believe that we are your dependable partner for high-performance welded tubing solutions.
What Are Welded Tubes?
‘Cylindrical’ is the shape of the Welded Tubes which are manufactured using rolling a metal strip into a round shape and then welding the edges together to form a strong, continuous joint. The welding process that includes ERW (Electric Resistance Welding) or EFW (Electric Fusion Welding) helps in creating a durable seam, resulting in tubes that are widely used across structural, mechanical, and industrial applications.
Welded pipes is generally an economical, reliable and versatile solution in various industries. With regards to the welded vs seamless tubes comparisons and selecting one from among them will depend on the pressure requirements, application type, and budget.
Welded Tube Manufacturing Process:
Usually, the welded tube manufacturing process involves use of a series of precise forming, welding, heat-treating, and finishing steps. They help transform high-quality metal strips into durable and dimensionally accurate tubes.
We at Metal Forge India show you below how precision welded tubes, welded stainless steel tubes are made using an unique welded tube manufacturing process. It is as follows:
- Slitting and selection of raw material occurs
- The shape formation of tube occurs
- ERW Welding is completed
- TIG / Laser Welding is done
- Annealing or Heat Treatment is accomplished
- Sizing, Straightening & Non-Destructive Testing done
- Application of Surface Finishing & Polishing
Types of Welded Tubes:
We at Metal Forge India, offer you a comprehensive range of 100% Premium ASTM welded tubes specifically designed for durability, corrosion resistance, and precision performance across various sectors. They are as given below:
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Welded stainless steel pipe:
Welded stainless steel pipes are typically used in a bunch of applications that require excellent corrosion resistance, clean surface finish and long service life. You know what? We manufacture these pipes according to international standards LIKE ASTM A249, ASTM A269 and ASTM A312.
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Welded carbon steel pipe:
“High strength” is what carbon steel welded pipes offer in a piping system. It also provides good stiffness and cost-effective performance. These ASTM welded pipes are manufactured to ASTM , ASTM A53, ASTM , ASTM A500 and ASTM A135.
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Alloy Steel Welded Tubes:
Welded pipes are usually made of alloy steel with a mixture of alloying elements. These include chromium molybdenum nickel and vanadium. These components improve mechanical strength and resistance to high temperatures.
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Nickel Alloy Welded Tubes:
These are welded tubes specifically designed for hostile environments where superior corrosion, oxidation, and temperature resistance are required. Besides, these tubes offer outstanding performance in aggressive chemical and marine conditions.
Welded Tube Specifications & Standards:
We at Metal Forge provide for you welded tube standards and specifications of Welded Tubes given in the table below:
| Standard | Material / Grade | Description | Application |
| ASTM A269 | Stainless Steel (304, 304L, 316, 316L) | Covers seamless and welded stainless steel tubes for general corrosion-resistant and low-/high-temperature services. Commonly used for precision welded tubes. | Chemical processing, food & beverage, heat exchangers, general engineering |
| ASTM A249 | Stainless Steel (TP304, TP316, TP321, TP347) | Specifies welded austenitic stainless steel boiler, superheater, and heat-exchanger tubes. Requires high corrosion resistance and mechanical strength. | Boilers, condensers, heat exchangers, power generation |
| ASTM A554 | Stainless Steel (304, 316, 430, etc.) | Covers welded stainless steel mechanical tubing, supplied in polished, matte, or decorative finishes. | Architectural applications, furniture, automotive components |
| ASTM A789 | Duplex & Ferritic Stainless Steels | Includes seamless and welded duplex stainless steel tubes with high strength and corrosion resistance. | Offshore, chemical plants, desalination units |
| ASTM A1016 | Applicable to Ferrous Tubing | General requirements for ASTM welded tubes including tolerances, mechanical tests, and hydrostatic tests. | Used as supplementary standard along with A249, A269, etc. |
| EN 10217 | Carbon & Low Alloy Steels | European standard for welded steel tubes for pressure purposes. | Petrochemical, oil & gas, pressure vessels |
| ISO 1127 | Stainless Steel | Covers dimensions, tolerances, and technical delivery conditions for welded stainless steel tubes. | International supply, precision engineering |
Welded Tube Dimensions & Sizes:
We at Metal Forge India offer you welded tube dimensions in a welded tube size chart or table below:
| Outer Diameter (OD) | Wall Thickness Range | Length Range |
| 6 mm – 25 mm | 0.50 mm – 2.0 mm | 4 m – 6 m |
| 25 mm – 50 mm | 0.80 mm – 3.0 mm | 4 m – 6 m |
| 50 mm – 75 mm | 1.0 mm – 4.0 mm | 6 m – 7 m |
| 75 mm – 114 mm | 1.5 mm – 5.0 mm | 6 m – 8 m |
| 114 mm – 168 mm | 2.0 mm – 8.0 mm | 6 m – 9 m |
| 168 mm – 219 mm | 3.0 mm – 10.0 mm | 6 m – 10 m |
| 219 mm – 273 mm | 4.0 mm – 12.0 mm | 6 m – 12 m |
| 273 mm – 324 mm | 5.0 mm – 14.0 mm | 6 m – 12 m |
| 324 mm – 406 mm | 6.0 mm – 16.0 mm | 6 m – 12 m |
| 406 mm – 508 mm | 6.0 mm – 20.0 mm | 6 m – 12 m |
| 508 mm – 630 mm | 8.0 mm – 25.0 mm | 6 m – 12 m |
Applications & Industries:
The welded tube applications are in a wide range of industrial applications simply because of their strength, corrosion resistance, and cost efficiency especially in heat exchanger welded tubes and condenser tubes They are given below:
- Heat Exchangers:
- Condensers
- Boilers & Superheaters
- Structural Support & Fabrication
- Fluid & Gas Transportation
- Automotive & Transportation
- Furniture & Architectural Applications
Advantages of Welded Tubes:
We at Metal Forge provide you with a few key advantages of welded tubes are given below:
- Availability of polished welded tubes
- High Dimensional Accuracy
- Uniform Quality & Strength
- Cost-Effectiveness
- Availability in Multiple Finishes
- Versatility Across Materials
Why Choose Metal Forge India for Welded Tubes?
At Metal Forge India, a top Welded Tubes Manufacturer, Supplier & Exporter in India we believe in delivering high-quality tubing solutions engineered for performance, durability, and international standards.
We are one of the best welded tube suppliers in India who focus on precision manufacturing, strict quality control, and reliable customer support for local and global industries. Besides, there are other reasons why you need to choose Metal Forge India for Welded Tubes. They are given below:
- Comprehensive Range of Material Grades
- Certified & Tested Materials
- Advanced Manufacturing Facilities
- Global Supply Capability
- Customer-Centric Service
FAQs on Welded Tubes:
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What are welded tubes used for?
Generally, welded pipes are used in a bunch of industries. This is mainly due to its strength, accuracy, smooth surface and cost-effectiveness. They are made by forming and welding metal strips. They are therefore ideal , ideal for both , both structural and fluid handling applications. -
What is the difference between welded and seamless tubes?
Both welded tubes and seamless tubes are two major categories of tubing. They also possess a few similar functions. However, there is also a difference between the two which we at Metal Forge provide you with the table below:
| Parameter | Seamless Tubes | Welded Tubes |
| Manufacturing Process | Produced by piercing a solid billet to form a hollow tube | Formed from metal strip/coil and welded along the seam |
| Weld Seam | No seam (uniform structure) | Contains a longitudinal weld seam |
| Strength | Higher strength due to absence of weld | Slightly lower strength at weld area |
| Pressure Handling | Suitable for high-pressure & high-temperature applications | Suitable for low to medium-pressure applications |
| Dimensional Accuracy | Moderate; slight variations may occur | Excellent accuracy and consistent wall thickness |
| Surface Finish | Comparatively rougher | Very smooth internal and external finish |
| Cost | More expensive | More cost-effective and economical |
| Size Availability | Limited range, especially in large diameters | Widely available in larger diameters and longer lengths |
| Common Applications | Boilers, oil & gas, power plants, high-pressure systems | Heat exchangers, automotive, structural, architectural, general engineering |
| Production Speed | Slower and more complex | Faster and suitable for mass production |
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Do you supply polished or annealed welded tubes?
Yes we at Metal Forge India offer both Polished welded tubes and annealed welded tubes. More importantly, they are available in various grades Stainless Steel (304, 304L, 316, 316L, 321, 310/310S, etc.), Carbon Steel & Alloy Steel, Duplex & Super Duplex, and Nickel Alloys.
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What are the standard grades available?
Some of the standard grades that we offer you are as follows:
- Stainless Steel: Austenitic Grades, Ferritic Grades, and Duplex & Super Duplex Grades
- Carbon Steel: ASTM A53, ASTM A106, ASTM A500, and IS 1239 / IS 3589
- Alloy Steel Grades: ASTM A213, ASTM A335 (P1, P5, P9, P11, P22, P91), and ASTM A209
- Nickel Alloy Grades: Inconel 600 / 601 / 625, Incoloy 800 / 825, Monel 400 / K500, Hastelloy C22 / C276
- Titanium Grades: Grade 1, Grade 2, Grade 5 (Ti-6Al-4V)
- Copper & Copper-Nickel Grades: Cu-Ni 70/30 and Cu-Ni 90/10