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Classifications of Steel Pipe Fittings
Posted: 03/20/2017 02:55:31  Hits: 33
Seamless and welded pipe fittings
Stainless steel welded pipe fittings listed in the product standard include elbow, tee, cross, reducer, cap, bend, stub end, and so on.
Commonly elbow is classified into 45 °, 90 °, 180 ° based on different angles. 
It is classified into long radius elbows (R ≈ 1.5DN, which is about 1.5 times of the nominal radius ) and short radius elbow (R ≈ 1.0DN, that is, its diameter is about 1 time of the nominal diameter) according to its diameter. Among which, 90 °long radius elbow can also classify into reducer elbow. In addition, according to the direction of pipeline, there will be special angle elbows, such as 60 °, 88 ° 25 "elbow , etc.
There are equal and reducing tees and crosses. The connection end of equal tee and cross should be the same size. The size of main pipe for reducing tee and cross should be the same, while the size of the branch pipe is supposed to be smaller than that of the main pipe.
We have concentric reducer and eccentric reducer. The diameter of the large end of the eccentric reducer and its small end diameter should have the same axis. The diameter of the large end of the eccentric reducer and the small end diameter are two axes which are parallel to each other, one side of the small diameter is parallel to the outer edge of the large end diameter. The elbow is ordered by bending angle and bending radius. It is generally required to have straight pipe ends at both ends of the elbow. The smallest diameter is usually 2.5 to 3 times of the outer diameter of the pipe. (R≥2.5D to 3D).


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