Steel Pipe Fittings Types and Applications

Steel Pipe Fittings Types and Applications


There are many kinds of pipe fittings according to different standards and they are used in different scenarios

Steel Pipe Fittings Types And Applications
To get a better known to pipe fittings, here we classify them into different types from different sides.
• According to different body materials for industrial pipelines, there are
Stainless steel pipe fittings
Carbon steel pipe fittings (Black steel pipe fittings)
Alloy steel pipe fittings

• According to different coatings, there are
Black painted
PE coated
Cladding stainless steel or alloy steel
Galvanized steel pipe fittings (zinc-coated)

• According to different industrial purposes, there are
Oil and gas pipelines
Chemical plants
Food industry
Power stations
Fire sprinkler pipe fittings

• According to different connection types, there
Buttweld fittings type
Socket weld fittings type
Threaded type
Flanged type
90 Degree Steel Pipe Elbow

Steel Elbow and Bends: For to change the direction of the pipeline
Steel Tee (Reducer Tee): To connect pipes from 3 directions.
Cross: To connect pipes from 4 directions.
Reducer (Con. Reducer – Ecc. Reducer): Reduce the flow rate of the line pipe system;
Steel Cap: End the pipelines, to seal the pipe.

45, 90, and 180-degree elbow are the most commonly used. Elbow materials have cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, nonferrous metals, and plastics. The connection ways between elbow and pipe include flange connection, hot melt connection, fused connection, threaded connection, and socket connection.

According to the production process, the elbow can be divided into welding elbow, stamping elbow, pushing elbow, casting, and butt welding elbow.

Based on its radius of curvature, the elbow can be divided into long radius elbow and short radius elbow
Long Radius Elbow (R=1.5D): Commonly adopted;
Short Radius Elbow (R=1.0D): Usually used in low-pressure fluid and size-limited situations. R—elbow diameter, D—radius of curvature.
45 Degree Elbow
90 Degree Elbow
180 Degree Elbow
A steel Pipe tee is used for the place where three pipes are assembled. It is mainly used to change the direction of the fluid in the branch pipe.
Reducer is one of the chemical pipe fittings that can connect two different diameter pipes. It is also divided into concentric and eccentric reducers. Reducer material includes stainless steel reducer, alloy steel reducer, different diameter carbon steel reducer, and so on.
According to different connection types, steel pipe fitting can be divided into four categories:

Welded pipe fittings

Socket weld pipe fittings

Threaded pipe fittings

Flanged pipe fittings.

1.Welded steel pipe fitting

Welded steel pipe fittings range in butt weld and socket weld.

A welded pipe fitting connected to the pipe by welding is mainly used for connecting with a steel pipe. It is especially suitable for long pipelines, but not convenient for disassembling pipes frequently. It can be soldered or brazed, the latter often used for copper piping. Welded steel pipe fittings include elbow, flange, tee, reducer, head, and other types.

2.Threaded pipe fittings

Threaded pipe fittings are commonly used in water and gas pipes. With a small diameter, including a compressed air pipe and a low-pressure steam pipe. The common materials of threaded pipe fittings have forged steel, cast steel, cast iron, and malleable iron. Threaded pipe fittings mainly include internal pipe, external pipe, live pipe connection, reducer, and so on.

3.Flanged pipe fittings

The flange pipe fitting belongs to the welded pipe fitting. Its material has various kinds, such as carbon steel, alloy steel, stainless steel, and so on.

4.Socket Weld Pipe Fittings

Socket welding is to install the pipe end into the valve body and perform welding. It has a shape similar to the internal thread connection after forming. Socket welding fittings are generally used for small diameters less than or equal to DN40, which is more economical. Butt welding is generally used for DN40 or more. 

In pipeline systems, steel pipe fittings play an important role in transporting liquid materials. It is widely applied in oil and gas pipelines, water conservancy science and technology, and other fields. Used to connect, control, change direction, divert, seal, and other functions apart from the straight pipe.