Stainless Steel Seamless Pipe

Stainless Steel Seamless Pipe

Formed from a solid billet of stainless steel by perforation, extrusion or stretching without any welded joints, forming a seamless continuous structure. Compared with stainless steel welded pipes, this kind of pipe has a smooth surface, uniform wall thickness, no welded joints, more precise dimensions, better strength and resistance to pressure, corrosion and fatigue, which improves the overall integrity and lifespan of the pipeline system. Suitable for critical environments such as the oil and gas, petrochemical, pharmaceutical and food processing industries.

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 Seamless pipe grades & Types at Gnee

Gnee Steel Trading Company is your preferred stainless steel seamless pipe supplier. Based on our strong factory strength and huge inventory, we are able to deliver high-quality products quickly and on time. We are committed to meeting customer needs, with no minimum volume limit, and provide free samples to ensure your satisfaction. We have a wide selection of grades and sizes to suit a variety of industrial applications.

Stainless Steel Seamless Tube Common Grades
Stainless Steel Seamless Pipe Specification
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 DimensionsSize: 1/2″ OD – 12″ ODOD: 3.00 – 219.10 mm
Thickness : 0.40 – 12.70 mm
Length: Single, Double Random & Cut Length
Thickness RangeSCH 5, SCH10, SCH 40, SCH 80, SCH 80S, SCH 160, SCH XXH, SCH XXS, SCH XSSCH 5,SCH 10,SCH 40,SCH 80,SCH 80 S,SCH 160,SCH XXH,SCH XXS,SCH XS
Relevant StandardASTM A213, ASTM A312, ASTM A269, ASTM A778, ASTM A554, ASTM A249, ASTM A270, ASTM A789
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
TechniqueCold drawn, Cold rolled, Hot rolled, Extrusion Tubes 
Processing ServiceBending, Welding, Decoiling, Punching, Cutting, Moulding
Packaging SS Seamless TubePacked 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 Seamless Pipe
3210.080.0450.0300.7517.00-19.009.00-12.005xC, 0.70 maxBalance
GradeTensile Strength (MPa)Yield Strength (MPa)Elongation (%)Hardness (HB)
316515-690205-31040217 (Brinell)
321515-730205-31040217 (Brinell)
317L515-690205-31040217 (Brinell)
904L490-690220-49035190 (Brinell)
  • 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 Seamless 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 Seamless Pipes?

Stainless steel seamless pipes are known for their excellent corrosion resistance. They are highly resistant to rust, oxidation, and many corrosive environments, making them suitable for use in harsh conditions.

Stainless steel seamless pipes exhibit high strength and durability, making them capable of withstanding high-pressure and high-temperature applications. They offer structural integrity and reliability even in demanding environments.

The seamless manufacturing process eliminates the presence of welded joints in the pipe, resulting in a smooth and continuous structure. This seamless construction offers enhanced strength, improved flow characteristics, and reduces the risk of leaks or failures.

Stainless steel seamless pipes are available in a wide range of grades, sizes, and thicknesses, offering versatility in various applications. They can be used in industries such as oil and gas, chemical processing, food processing, pharmaceuticals, automotive, and more.

Stainless steel seamless pipes have excellent heat resistance, allowing them to withstand high temperatures without deformation or loss of mechanical properties. They also have good fire resistance, making them suitable for use in fire suppression systems and applications requiring fire safety.

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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