Stainless Steel Flange

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AS2129 stainless steel flanges are designed according to the Australian Standard AS2129, catering to low and medium-pressure pipe work. They are used to connect pipes, valves, pumps, and other equipment within a piping system. Ideal for industries like water treatment, petrochemical, and general industrial applications in Australia, these flanges ensure secure joint connections where AS2129 compliance is required.

Slip-on flanges

15mm to 1600mm.
Available in 304, 316, 2205(duplex)

Blind flanges

15mm to 1200mm.
Available in 304, 316, 2205(duplex)

Weldneck flanges

15mm to 350mm.
Available in 304, 316, 2205(duplex)

Threaded flanges

15mm to 150mm.
Threaded in BSP or NPT.
Available in 304, 316, 2205(duplex)

AS4087 stainless steel flanges comply with the Australian Standard AS4087, which specifies requirements for metallic flanges used in waterworks. They are primarily utilized in water supply and sewage systems to connect pipes and fittings securely. Suitable for high-pressure applications, these flanges are essential in municipal and industrial water infrastructure, ensuring reliability and safety in critical water services.

Slip-on flanges

50mm to 1200mm.
Flat or Raised Face.
Available in 304, 316, 2205(duplex)

Blind flanges

50mm to 1200mm.
Flat or Raised Face.
Available in 304, 316, 2205(duplex)

Weldneck flanges

50mm to 1200mm.
Flat or Raised Face
ring or oval face set.
Available in 304, 316, 2205(duplex)

Threaded flanges

50mm to 600mm.
Threaded in BSP or NPT.
Raised Face.
Available in 304, 316, 2205(duplex)

ASME stainless steel flanges are manufactured according to the American Society of Mechanical Engineers (ASME) standards, specifically ASME B16.5. They are widely used in piping systems to connect pipes, valves, and equipment under high pressure and temperature conditions. Commonly found in oil and gas, chemical, and power generation industries, these flanges ensure compliance with international norms for safety and performance.

Slip-on flanges

15mm to 600mm.
Raised Face.
Available in 304, 316, 2205(duplex)

Blind flanges

15mm to 600mm.
Raised Face.
Available in 304, 316, 2205(duplex)

Weldneck flanges

15mm to 600mm.
Raised Face.
Available in 304, 316, 2205(duplex)

Threaded flanges

15mm to 150mm.
Raised Face.
Threaded in BSP or NPT.
Available in 304, 316, 2205(duplex)

EN1092 stainless steel flanges are produced based on the European Standard EN 1092-1 for circular flanges. They are used to join pipes, valves, and other components in a piping network, providing a leak-proof seal. Predominantly used in European markets, these flanges are suitable for industries like petrochemical, food processing, and pharmaceuticals, where adherence to European standards is essential for regulatory compliance and system compatibility.

Slip-on flanges

Type 01.
15mm to 1400mm.
Raised Face
Available in 304, 316, 2205(duplex)

Blind flanges

Type 05.
15mm to 1400mm.
Available in 304, 316, 2205(duplex)

Weldneck flanges

Type 11.
15mm to 1400mm.
Raised Face.
Available in 304, 316, 2205(duplex)

Threaded flanges

15mm to 600mm.
Raised Face
Threaded in BSP or NPT.
Available in 304, 316, 2205(duplex)

Available in most materials:

ASME/ANSI

ASME 16.48
ASME 16.36
ASME 16.47A
ASME B16.47 B

JIS

JIS B2220

International

API 6A
AWWA C207
BS4504
ISO7005
ISO4331

Petrochemical companies with their own specifications

Petrochemical companies including ESSO, SHELL, APA, API, WOODSIDE, EXXON MOBIL, Chevron, Bechtel all have specialist requirements. These can be supplied in a stunning range of materials and configurations.

ESSO Logo

ESSO

SHELL Logo

SHELL

APA Logo

APA

API Logo

API

WOODSIDE Logo

WOODSIDE

EXXON MOBIL Logo

EXXON MOBIL

Chevron Logo

Chevron

Bechtel Logo

Bechtel

What is stainless flange?

This is a flange made from stainless steel. Most standards specify a range of materials the flanges can be manufactured from including Stainless Steel. Stainless steel is a generic classification for steel that has a varied resistance to corrosion. Mostly these materials have a high Nickel and Chromium content.

What stainless steel material and grade should I select?

The most common stainless steels are:

  • 304/304L Stainless Steel 8-11% nickel, 18-20% Chromium
    This is a general purpose stainless steel that is suitable for outdoor use.
  • 316/316L Stainless Steel 10-14% nickel, 16-18% Chromium, 2-3% Molybdenum.
    This has better corrosion ability specifically where chlorine is present.
  • Duplex Stainless Steel. Known as A240 2205 or A182 F51
    4.5-6.5% nickel, 21-23% Chromium, 2.5-3.5% Molybdenum
    Used where extreme corrosion resistance is required such as in seawater.

These stainless steels require specific manufacturing techniques and heat treatment to achieve the corrosion resistance ability.

The material used to manufacture the flange is chosen specifically to cope with the fluid being transported and the environment.

Explain the properties and typical applications of each material.

Sizes and Specifications grades/shapes

  • Available sizes (e.g., 1/2" to 24")
  • Pressure ratings (e.g., 150#, 300#, 600#)
  • Standards (e.g., ASME, DIN, JIS)
  • Flange Type

Applications

List and briefly describe common applications in various industries:

  • Oil and Gas – used where corrosive fluids are being transported for their process or to clean the lines
  • Chemical Processing. Many processes are very corrosive and it is not uncommon to use stainless steel with a protective paint.
  • Food and Beverage. Everything in food is done with stainless steel that does not contaminate the contents and resists the cleaning chemicals used
  • Water Treatment. 2205 and 316 is used extensively in desalination plants and associated piping.

Why use stainless flanges?

Stainless flanges are used when either the process demands it or the environment is corrosive or both. Sometimes stainless flanges are used because they look terrific such as in engine rooms in boats where everything is kept clean and shiny.

Stainless flange vs carbon flange

Stainless flanges are always more expensive than the carbon steel variant. It comes down to corrosion resistance and cost, and in some cases, presentation.

What is duplex stainless steel flange?

A stainless flange from A240 2205 or A182 F51.

304 vs 316

Use 316 where more corrosion resistance is required and the extra cost is justified.

How to install stainless steel flanges with pipes?

Stainless flanges are welded to the stainless pipe providing a corrosion resistant joint that can be bolted to a valve or more piping.

How much pressure can a stainless steel flange take?

Pressure ratings of flanges are found in the standard applicable to the flange being used. Additional standards mostly include temperature derating charts so the capability of the flange to withstand pressure is documented as the temperature increases. Generally, the ranges are pressure dependent, so AS4087 PN 16 means 16 bar and ASME B16.5 300 lbs is indicative of the pressure withstood.

Can we mix carbon steel flange with stainless steel flange?

Yes, it is OK to bolt stainless steel flanges to carbon steel flanges.

Flange Standards

Flange tables are produced to assist engineers in selecting the right flange. Always refer the selection of flanges to a qualified person.
Learn about flange standards

Flange Basics

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