Stainless Steel Welded Pipe

Stainless Steel Welded Pipe

Stainless steel welded pipe refers to a pipe made by joining stainless steel sheets or strips together through a welding process. It is a substitute for stainless steel seamless pipes. Welding methods provided by Gnee include resistance welding (ERW), fusion welding or laser welding. The weld has excellent strength and durability, making it suitable for high-pressure and high-temperature applications. At Gnee, we offer stainless steel welded pipes in a variety of sizes, diameters and wall thicknesses. Quotes are welcome!

Standard Types Provided:


Production Process:

  • Alloying & Smelting
  • Casting
  • Quality Control & Testing
  • Extrusion
  • Polishing
  • Pickling
  • Passivation

Production Technology:

  • Melting
  • Casting
  • Hot rolled
  • Cold Rolled
  • Heat Treatment
  • Cutting
  • Machining
  • Surface Treatment

Available, welcome to consult

A) Packaging Details: Standard export seaworthy packing or as required.
B) Delivery Time: 30-50 days, 7 days for stock goods.
C) Loading Port: Shanghai, Tianjin, Qingdao.
D) Offer Ability: 5000MT/Per Month.
E) MOQ: 1 Pcs.

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supply Rich SS welded pipe grades & sizes at Gnee

Gnee offers superior quality stainless steel welded pipe that is durable, corrosion resistant and manufactured to the highest industry standards. With prompt delivery, expert technical support and competitive pricing, our pipes are available in a variety of grades and sizes and can be customized to your exact requirements. Gnee is your reliable partner to meet your stainless steel welded pipe needs, welcome to contact us!

Stainless Steel Welded Tube Common Grades
Stainless Steel Welded Pipe Specification
Common Areas Of Stainless Steel Welded PipesStainless steel welded superheater, condenser, hydraulic, boiler and heat exchanger tubes
Manufacturing TypeERW Welded Pipe, Longitudinal Welded Pipe, Spiral Welded Pipe, High-Frequency Welded Pipe, Submerged Arc Welded Pipe
Delivery ConditionAnnealed and Pickled (AP), Polished, Bright Annealed (BA), Cold Drawn, MF
Surface Finish2B, 2D, BA, No.1, No.3, No.4, No.6, No.7, No.8, HL(Hairline), SB(Scotch-Brite), 6k, 8k, 12k, LASER, EMBOSSED
Size and DimensionsSS Welded Pipes
Outside Diameter OD: 6 – 304.8 mm
Wall Thickness Range: 0.8 – 12.7 mm
Length: Single, Double Random & Cut Length
Customize: Available
ToleranceOuter Diameter: +/- 0.2mm
Thickness: +/- 10% OR as customer request
Length: +/- 10mm
Value Added ServicesCutting, Beveling, Threading, Polishing (Electro & Commercial), Draw & Expansion as per required Size & Length, Destructive and Non Destructive, Ultrasonic Testing, Annealed & Pickled Bending
Processing ServiceBending, Welding, Decoiling, Punching, Cutting, Moulding
TechniqueWelded Pipe  Austenitic Steel Cold drawn, Cold rolled, Hot rolled, Extrusion Pipe
Packaging SS Welded PipePacked in PE Fabric Bundles or ply wooden boxes wrapped in plastic or Standard seaworthy export packing or as per customers’ request
Parameters Of Stainless Steel Welded Pipe
304≤ 0.08≤ 2.00≤ 0.75≤ 0.045≤ 0.03018.0-20.0%8.0-10.5%
304L≤ 0.030≤ 2.00≤ 0.75≤ 0.045≤ 0.03018.0-20.0%8.0-12.0%
316≤ 0.08≤ 2.00≤ 0.75≤ 0.045≤ 0.03016.0-18.0%10.0-14.0%2.0-3.0%
316L≤ 0.030≤ 2.00≤ 0.75≤ 0.045≤ 0.03016.0-18.0%10.0-14.0%2.0-3.0%
321≤ 0.08≤ 2.00≤ 0.75≤ 0.045≤ 0.03017.0-19.0%9.0-12.0%≥ 5(C+N)-0.70%
347≤ 0.08≤ 2.00≤ 0.75≤ 0.045≤ 0.03017.0-19.0%9.0-13.0%10(C+N)-1.0%
409≤ 0.08≤ 1.00≤ 1.00≤ 0.045≤ 0.03010.5-11.7%
904L≤ 0.02≤ 2.00≤ 1.00≤ 0.045≤ 0.03519.0-23.0%23.0-28.0%4.0-5.0%1.0-2.0%
GradeTensile Strength (MPa)Yield Strength (MPa)Elongation (%)Hardness (HB)
304≥ 515≥ 205≥ 40≤ 201
304L≥ 485≥ 170≥ 40≤ 201
316≥ 515≥ 205≥ 40≤ 217
316L≥ 485≥ 170≥ 40≤ 217
321≥ 515≥ 205≥ 40≤ 201
347≥ 515≥ 205≥ 40≤ 201
409≥ 360≥ 205≥ 22≤ 179
904L≥ 490≥ 220≥ 35≤ 192
  • Common industrial services (petroleum, chemicals, paper, fertilizers, textiles, aviation and nuclear)
  • Fluids, natural gas and petroleum industries
  • Heat transfer and pressure services
  • Architecture and decoration
  • Boiler and heat exchanger system
  • Decoration purposes, boilers, auto parts, medical equipment, food industry, building materials)
Why Choose Gnee Stainless Steel Welded Pipe?

Gnee, as a Chinese stainless steel supplier with 15 years of history, exports to 60+ countries. We provide various shapes of stainless steel, including plates, coils, pipes, bars, and fittings. Gnee is committed to providing comprehensive stainless steel solutions, with excellent after-sales service, we support customization and ensure product quality.

In addition, our stainless steel pipe has been successfully exported to more than 60 countries such as Singapore, Malaysia, The United Arab Emirates, Oman, Turkey, Nigeria, Egypt, Kuwait, Indonesia, Qatar, and Kenya. Many regular customers come to visit our company and factory and make multiple orders.

What‘s The Feature Of Stainless Steel Welded Pipes?

Stainless steel welded pipes are known for their strength and durability. The welding process creates a strong bond between the stainless steel plates or coils, resulting in a robust and reliable pipe that can withstand high pressure and temperature conditions.

Stainless steel is highly resistant to corrosion, making welded pipes an excellent choice for applications where exposure to corrosive environments is a concern. The inherent corrosion resistance of stainless steel helps to maintain the integrity and longevity of the pipe.

Stainless steel welded pipes offer versatility in terms of applications. They are suitable for a wide range of industries, including oil and gas, petrochemicals, food processing, pharmaceuticals, construction, and plumbing. They can be used for conveying various fluids, gases, and solids.

Stainless steel welded pipes are available in a wide range of sizes and diameters, allowing for flexibility in design and installation. They can be customized to meet specific project requirements, ensuring proper fit and functionality.

Compared to seamless pipes, stainless steel welded pipes are generally more cost-effective. The welding process is simpler and less time-consuming, resulting in lower production costs. This makes welded pipes a cost-efficient option for many applications.

Stainless steel is known for its excellent weldability, allowing for efficient and reliable welding of the pipe joints. Various welding techniques such as electric resistance welding (ERW), fusion welding, or laser welding can be employed to create strong and durable welded connections.

What Services Does Gnee Provide?

Gnee can provide the following measurement services for stainless steel:

Dimensional Measurement: Measure dimensional parameters such as length, width and thickness by measuring instruments to ensure that the stainless steel is qualified and meets the design requirements.
Surface Measurement: Measure parameters such as flatness, bumpiness and surface roughness of the stainless steel surface to help ensure that the quality and surface condition of the stainless steel meets the requirements.
Thickness Measurement: Use thickness gauges to accurately measure the thickness of the stainless steel to ensure it meets the design requirements.
Material Measurement: Use material analysis instruments to measure the chemical composition and mechanical properties of the stainless steel to ensure that the quality and properties of the stainless steel meet the requirements.
Bending And Deformation Measurements: Use tools such as bending gauges and displacement sensors to measure and monitor the degree of bending and deformation of stainless steel to ensure that it is within the allowable range.

Ask Measurement service

Gnee can customize the size and shape of your stainless steel for your specific project needs. Custom design of stainless steel is carried out by a team of professional engineers and designers. Based on the project requirements and constraints, they will use calculation and simulation tools combined with experience and technical knowledge to optimize the stainless steel design to meet the specific needs of your different projects

● Adjustment of the thickness, width and length of stainless steel based on load calculations and strength requirements for structural design.
● The shape of the stainless steel can be designed according to the demand characteristics.
● If the convenience of installation and maintenance is considered, we can also add openings and passages for easy access and operation in the design for areas that require frequent maintenance.

Ask Customized Services

Sourcing Gnee stainless steel can provide the following further processing services. We can customize to meet the specific needs of our customers for different projects.

Cutting Service: Stainless steel can be custom cut to obtain the desired shape and size according to the customer’s needs. For example, flame cutting, plasma cutting, laser cutting, etc., can cut stainless steel into desired plates, blocks, shaped pieces, etc.
Bending & Forming: Stainless steel is bent and formed by applying stress and appropriate processes to obtain the desired shape.
Welding Services: Stainless steel can be subjected to various types of welding services, including manual arc welding, gas-shielded welding, laser welding, etc.
Hole Turning And Machining: Stainless steel is turned and holes are machined through the use of machining equipment. These processes produce smooth surfaces, precise holes and threads to meet specific assembly requirements.
Surface Treatments: Surface treatments can be applied to improve the corrosion resistance and aesthetics of the stainless steel. This includes methods such as painting, hot dip galvanizing, and electroplating to add a protective layer and provide corrosion resistance.

Ask Deep Processing Services

Gnee stainless steel can provide testing and the following third-party inspection services. These third-party testing services provide independent and objective verification of stainless steel’s compliance with relevant standards and regulations.

Mechanical Property Testing: Used to determine whether the strength, toughness, ductility and other mechanical properties of stainless steel meet the specified requirements.
Chemical Composition Analysis: Quantitative determination of elements on stainless steel samples through spectral analysis, atomic absorption spectroscopy, inductive coupling and other technologies.
Corrosion Performance Test: Common corrosion performance test methods include salt spray corrosion test, acid-base corrosion test and electrochemical corrosion test.
Tensile Strength Test: Through the tensile test, the parameters such as yield strength, tensile strength and breaking strength of stainless steel during the tensile process are measured.
Non-Destructive Testing: Non-destructive testing is used to evaluate hidden defects, cracks and looseness in stainless steel materials. Common methods include ultrasonic testing, magnetic particle testing, eddy current testing, and radiographic testing.
Pressure Test: By exposing stainless steel products to a specific pressure, it is tested whether there are problems such as leakage or deformation to ensure that its pressure resistance meets the requirements.
Surface Quality Test: Used to evaluate the surface flatness, smoothness and oxide layer of stainless steel products.
Welding Performance Test: Check the appearance, mechanical properties and metallographic microstructure of the weld to ensure that the quality of the stainless steel welded joint meets the requirements.
Metallographic Inspection: Through metallographic inspection, the structure, grain size, non-metallic inclusions, etc. of stainless steel are checked to evaluate its quality and performance.

Ask Testing Services
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