Knowledge of Stamping Elbows

Carbon steel: ASTM/ASME A234 WPB、WPC
Alloy: ASTM/ASME A234 WP 1-WP 12-WP 11-WP 22-WP 5-WP 91-WP911, 15Mo3 15CrMoV, 35CrMoV
Stainless steel: ASTM/ASME A403 WP 304-304L-304H-304LN-304N, ASTM/ASME A403 WP 316-316L-316H-316LN-316N-316Ti, ASTM/ASME A403 WP 321-321H ASTM/ASME A403 WP 347-347H
Cryogenic steel: ASTM/ASME, A402, WPL3-WPL6
High performance steel: ASTM/ASME, A860, WPHY, 42-46-52-60-65-70 
Other materials: Cast steel, alloy steel, stainless steel, copper, aluminum alloy, plastics, PVC, PPR, RFPP, etc.

Ranges of Applications
The stamping elbow has good comprehensive properties. It is widely used in the chemical industry, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, plumbing, fire protection, electric power, aerospace, shipbuilding and other fundamental projects.
Manufacturing of stamping elbows
The stamping elbows are made of some special raw materials. These raw materials should be strictly and properly selected and controlled, otherwise the quality of stamping elbows will not be guaranteed.

Stamping elbows can be made of many kinds of stamping materials and they have wide ranges of applications. A large-scale high-tech industry group is forming, which makes the stamping elbows have a broad market prospect and strategic significance.

Standard of stamping elbows
The international standard for the elbow is the national standard of the United States, ANSIB16.9 and 16.28. The outer diameter range of this standard is from 1/2 “to 80”.

Generally, stamping elbows with the outer diameter equal to or less than 24″ are made of the seamless steel pipe, and those with the outer diameter from 26″ to 80″ are made of steel plates through the stamping process and then are welded. The maximum of wall thickness of the stamping elbow is 60mm, the minimum is 1.24mm. The most commonly used steel grades are carbon steel (20#), alloy steel and stainless steel. There are totally 24 grades of steel. The CrMo steel like 15Cr used for the boiler usually has the large consumption. The outer diameter of the tee is from 2.5″ to 60 “, and the tee with the outer diameter from 26″ to 60” belong to the welded tee which often has wall thickness between 28mm and 60mm.

China National Standard
Petrifaction standard of the elbow
SH 3408-1996
SH 3409-1996

The chemical standard of the elbow: HG/T 21635-1987
The electric standard of the elbow: DL/ T695
The petroleum standard of the elbow: SY/T 0510
The German standard of the elbow: DIN2605
The Japanese standard of the elbow: JIS
The marine standard of the elbow: GB/T10752-1995
The chemical standard of the elbow: HG21631-1990
Source: China Stamping Elbow Manufacturer – Yaang Pipe Industry (

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