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Which flange is used to connect pipes?

Author

Avery Gonzales

Published Apr 06, 2026

Which flange is used to connect pipes?

A pipe flange connects piping and components in a piping system by use of bolted connections and gaskets. Most commonly used flanges are weld neck flange, slip on flange, blind flange, socket weld flange, threaded flange and lap joint flange (RTJ Flange).

What is a stainless steel flange?

Stainless Steel Flanges are made up of different stainless steel materials. The ASTM A182 Weld Neck Flange are made up of a super austenitic material that has good corrosion resistant properties with low carbon in its composition. The applications include utility scrubber assemblies.

What is ring type joint flange?

A Ring type joint flange(RTJ) is a machined metallic ring with a deep groove cut into its face. This groove rests a metal ring which gets compressed when the connecting bolts of the flange are tightened. This compression results in a leak-proof, close-fitting seal on the pipe or connection.

How do I know what class my flange is?

The Pressure Rating for flanges will be given in Classes. Class, followed by a dimensionless number, is the designation for pressure-temperature ratings as follows: Class 150 300 400 600 900 1500 2500. Different names are used to indicate a Pressure Class.

What is the difference between RF and FF flange?

Flat face (FF) flanges are similar to the RF flanges, but they do not have the raised area like the RF flange. Instead, the whole surface is flat. They are commonly used in low temperature and pressure environments such as pump suctions or water treatment flanges.

How do I choose a flange?

Guidelines for Selection of Various Types of Flanges

  1. Pressure Temperature Rating of Flanges.
  2. Flange Dimensional Standards.
  3. Flange Facings.
  4. The bore of Welding Neck Flanges and Hub Design.
  5. Flange Material Limitations.
  6. Iron Flanges.
  7. Carbon Steel Flanges.
  8. Low and Intermediate Alloy Steel Flanges.

What is flange in beam?

The upright portion carrying the tension of the beam is termed a web or stem, and the horizontal part that carries the compression is termed a flange.

What is blind flange?

The blind flange is basically a flange that does not have a hub or a bored center. Blind flanges have the face thickness of a flange, a matching face type, and similar bolting pattern. Blind flanges can also be used to seal a nozzle opening on a pressure vessel.

Are lap joint flanges raised face?

The lap joint flange can be used in sizes and pressure classes similar to that of a weld-neck flange. The nature of this joint means that the stub end facing is also the flange facing, which makes it raised faced, and the gasket seating surface.

What is 150 flange pressure rating?

For example, a Class 150 flange is rated to approximately 270 PSIG at ambient conditions, 180 PSIG at approximately 400°F, 150 PSIG at approximately 600°F, and 75 PSIG at approximately 800°F.

What is the difference between slip on and weld neck flange?

The Weld Neck Flange offers increased strength under higher pressures, subzero or elevated temperatures that cause line expansion or retraction or other variable forces. The Slip On Flange is designed to be welded to pipe then a fitting as fittings are designed for butt weld connections.

Are there any carbon steel bleed ring flanges?

The Carbon Steel Bleed Ring Flange are fabricated with the wall thickness having the same dimensions of the matching pipes. We offer the latest technical advancements and carry well-maintained inventory ready for the fastest delivery to any location. What is Bleed Ring Flange?

What kind of steel is used for CS flanges?

CS flange material consists of low carbon steel, and the pressure ratings are usually of 150lb to 2500lb. Medium carbon steel blind flange have carbon content in a range of 0.25% and 0.60% . This contains high volume of carbon and manganese, because of which the ductility is good and also the fabrication of the product is excellent.

Where are carbon steel slip on flanges manufactured?

Quenching Carbon steel slip on flanges stockist in Mumbai, India, Manufacturer of 1/2″ ~ 6″ CS RTJ Flanges, View OD 2 1/2” Class 150 ASME B16.5 Carbon steel flange Price List. High-grade material is used in order to manufacture this product. Even different sizes, specification and thickness are available and based on this it is manufactured.

Which is the best type of pipe flange?

Flange is the equipment which is used to connect to pipes, pumps and valves for piping system. There are different types of flanges such as blind flange, lap, joint, welded and many other. Carbon steel flanges are widely used in high demand due to its excellent features like corrosion resistance, excellent durability and finishing is good.

When to use a ring or joint flange?

This is especially important if you are flanging together different metals, for example, stainless steel and carbon steel. A benefit of using a Ring-Type Joint Flange is that the groove within the flange ensures the ring centres itself when the bolts are tightened.

Is it possible to connect carbon steel to stainless steel flanges?

Is it possible to connect a stainless steel flange to carbon steel flange (24″ piping) with river water as the flowing fluid? what type of problem would the flange connection experience? do I need insulating kit? any help would be appreciated Please let us know here why this post is inappropriate.

What kind of joint is used on RTJ flanges?

RTJ Flanges, Ring Type Joint Flange Ring Type Joint Flange is a method of ensuring leak proof flange connection at high pressures. A metal ring is compressed into a hexagonal groove on the face of the flange to make the seal. This jointing method can be employed on Weld Neck, Slip-on and Blind Flange.

What’s the best type of flange to use?

Ring type joint flange face surfaces are an increasingly popular option with regards to flange connections. RTJ Flanges are a good alternative to raised face in certain applications. Typically, higher pressure and temperature projects use Ring Type Joints.