Flanges: Materials, Types, Applications and Other Considerations

Flanges are fittings that connect pipes to each other and are used to connect pipe ends. Flanges offer flexibility in piping maintenance, allowing easier disassembly and improved access to components.

Common materials of flanges include stainless steels, nickel alloys and aluminum alloys, ensuring compatibility with different applications.

Whatever size at whatever tight tolerance of custom made pipe spools you demand, SEATHER here is sure to have it!

stainless steel flanges
Stainless Steel Flanges
nickel alloys flanges
Nickel Alloy Flanges

Flanges Specifications:

  • Size Range:1/2″ – 48″ NPS (Larger sizes available upon drawing request)
  • SCH: 5 ~ XXS
  • Grades: Stainless Steels, Nickel Alloys, Aluminum, etc.
  • Standards: ASTM B462 / ASME B16.5 / MSS SP-25
  • Pressure Level: 150 – 2500lbs

Your Trusted Flanges Manufacturer In China

Seather provides high-quality flanges, including blind, RTJ, and lap joint flanges, designed for reliable connections in processing systems.

Seather’s plant features advanced CNC machines and heavy machining centres capable of handling workpieces up to 10,000mm (10 meters) and heavy-duty forgings, ensuring high-precision products. All manufactured to the highest standards of quality.

Flanges Materials & Grades

Nickel Alloys

ASTM B564 N10276,N06022,N04400,N06600,N06601,N06625, N08800, N08825,N08020 (W2.4819,2.4360,2.4361,2.4602,2.4816,2.4851,2.4856,2.4858,1.4876,1.4958 ) etc.

Stainless Steels

ASTM A/SA182 F304, F304L,F316, F316L, 316Ti, F317L, F321,F321H, F310H, F347H, N08904, ASTM A/SA182 F51, F53, F55, F59, F60 (W1.4462, 1.4410, 1.4501, 1.4507 etc.)

Aluminum Alloys

Aluminum 1060, Aluminum 6061, 6063, etc.

custom flanges materials and grades

Types of The Flanges

Flanges come in various types, and selecting the right design for your piping system is crucial for reliable performance, longevity, and cost-efficiency. Here are the most common flange types available.

Slip-on Flanges

stainless steel slip on flange

Lap Joint Flanges

stainless steel lap joint flanges

Blind Flanges

stainless steel blind flange

Weld Neck Flanges

stainless steel welding neck flange

Socket-Weld Flanges

stainless steel socket welding flange

Threaded Flanges

stainless steel threaded flange
flange applications and usages

Flange Applications & Usages

1. Seamless water pipes and steam pipes for power plant water supply
2. Sea water exchanger and evaporator
3. Sulfuric acid and hydrochloric acid environment
4. Crude oil distillation
5. Pump shaft and propeller of equipment used in sea water
6. The nuclear industry is used to manufacture equipment for uranium extraction and isotope separation
7. Pumps and valves used in hydrochloric acid production equipment

Manufacturing Process of Flanges

Flanges Standards and Markings

Standards:

We manufacture flanges strictly according to recognised standards:

  • ANSI/ASME B16.5
  • ASTM B462
  • MSS SP-25
  • BS 4504
  • BS 10
  • DIN
  • EN 1092-1

Markings:

When replacing or checking flanges, it’s essential they have markings, usually on the outer edge, to assist identification. These markings follow a specific sequence: manufacturer logo, ASTM material code, material grade, pressure-temperature rating, size, thickness, heat number, and any special designations like QT for quenched and tempered or W for welding repair.

This guide provides a comprehensive overview of flange design and selecting the right flange for your piping system. However, due to the vast range of stainless steel and nickel alloy flange materials available, it’s impossible to cover every detail or configuration here.

If you have any questions, Seather Technology’s Technical Sales Experts are here to assist. With over 30 years of experience serving global industries, we understand the complexities of alloy piping and your industry’s specific needs. Contact us today for more information and to find the perfect flanges, pipe fittings, and components for your next project.

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Contact us today and we’ll put together a quote tailored to your needs.

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