Top stainless steel Flange manufacturer

Gnee Steel Company is one of the leading flange/pipe fitting manufacturers, suppliers, exporters, wholesalers, and distributors in China. We produce high-quality stainless steel flanges, pipe fittings in compliance with ISO standards. We have rich grades and forms, various sizes, customized to your specific needs and available in a variety of surface treatments to ensure optimal performance.

Hot Sale Stainless Steel Flange With Large Stock
Stainless Steel flanges Grade Information

Gnee supplies a wide range of grades, here you can find any stainless steel flange you want. Our material includes Inconel flange, Incoloy flange, Monel flange, Hastelloy flange, stainless steel flange, duplex steel flange, super duplex flange, etc. Large inventory, factory price, welcome to quote!

  • 304 (UNS S30400, EN 1.4301)
  • 304L (UNS S30403, EN 1.4307)
  • 316 (UNS S31600, EN 1.4401)
  • 316L (UNS S31603, EN 1.4404)
  • 316Ti (UNS S31635, EN 1.4571)
  • 321 (UNS S32100, EN 1.4541)
  • 310 (UNS S31000, EN 1.4845)
  • 347 (UNS S34700, EN 1.4550)
  • 904L (UNS N08904, EN 1.4539)
  • 2205 (UNS S31803, EN 1.4462)
  • 2507 (UNS S32750, EN 1.4410)
  • 410 (UNS S41000, EN 1.4006)
  • 17-4PH (UNS S17400, EN 1.4542)
  • 317 (UNS S31700, EN 1.4449)
  • 317L (UNS S31703, EN 1.4438)
ASTM StandardA182, A403, A815
ASME StandardB16.5, B16.47, B16.36, B16.9, B16.11, B16.25
More Stainless Steel Flange information

Gnee factory has the largest inventory of stainless steel flange at its warehouse in Tianjin, China headquarters. It’s Widely used in oil and gas, the chemical industry, ships and other fields that require high corrosion resistance, strength and other complex environments.

Size Range

1/2” (15 NB) – 48” (1200NB)

Customized Services: Support customization and processing according to customer needs

Class: 150lbs, 300lbs, 400lbs, 600lbs, 900lbs,1500lbs, 2500lbs

Pressure: Class 150, Class 300, Class 400, Class 600, Class 900, Class 1500, Class 2500; PN6, PN10, PN16, PN25, PN40, PN64 etc.

  • Polishing
  • Chemical coloring
  • Pickling
  • Physical Vapor Deposition
  • Passivation
  • Sandblasting
  • Anti-rust Paint
  • Oil Black Paint
  • Yellow Transparent
  • Zinc Plated
  • Cold and Hot Dip Galvanized
  • Cutting
  • Welding
  • Bevel Cut
  • Uncoiling
  • Thread
  • Punching
  • Annealed Pickling Bend
  • Surface Treatment
  • Forming
  • Bending
  • Heat Treatment
  • Non-destructive Testing
  • Bright Annealed
  • Cold Treatment
  • Hot Extruding
  • Solid Solution
  • Petrochemical Industry
  • Oil and Gas Industry
  • Power Generation
  • Water and Wastewater Treatment
  • Food and Beverage Industry
  • Pharmaceutical Industry
  • Marine and Shipbuilding
Why Choose Gnee Stainless Steel Flange Company?

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, flanges, 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 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 Flanges?

Stainless Steel Flanges offer excellent corrosion resistance, making them suitable for applications where exposure to corrosive substances or environments is expected. They can withstand the effects of chemicals, acids, moisture, and other corrosive elements.

Stainless Steel Flanges are manufactured to withstand a range of operating conditions, including high-pressure and high-temperature environments. The pressure and temperature ratings of a flange depend on its design, size, and material grade.

Stainless Steel Flanges are designed to connect and join pipes, valves, fittings, or other equipment in a piping system. They provide a secure and leak-proof connection by bolting or welding the flange to the adjoining components.

Stainless Steel Flanges are highly versatile and used in various industries and applications. They are commonly used in piping systems, oil and gas refineries, chemical plants, water treatment facilities, food processing, pharmaceuticals, and many other industrial sectors.

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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