The Classification and technical requirements of stainless steel elbow

DataTime:[2016-7-9]

In the pipeline system, stainless steel elbow is change the direction of the line pipe fittings.
Points, stainless steel elbow classification: according to the Angle 45 ° and 90 ° 180 ° three most commonly used, according to the requirements of the project also included Angle 60 °, and other abnormal stainless steel elbow.
The material of the stainless steel elbow, stainless steel, alloy steel, cast iron can be calcined cast iron, carbon steel, etc.
With the pipe connection way: direct welding (the most common way) flange connection, threaded coupling has socket type coupling, etc.
According to the production process can be divided into: stamping welding of stainless steel elbow, stainless steel elbow, cast stainless steel elbow, etc.
A connection is commonly used in pipe installation with fitting, used for the connection outside the pipe bend.
Purpose: two of the same or different nominal diameter tubes, special steel flange made line turn Angle.
1 to material is divided into: carbon steel, cast steel, alloy steel, stainless steel, copper, aluminum, etc. (but small wood factory is pure forgings)
2 to the producing method dividing can be divided into: pushing, pressing, forging, casting, etc. (now are generally pure forging)
3 to create standard classified can be divided into: gb, electricity standard, water standard, American standard, Germany standard, Japanese standard, etc.
4 according to its radius of curvature points: can be divided into stainless steel elbow long radius and short radius stainless steel elbow. Stainless steel long radius elbow refers to its radius of curvature is equal to 1.5 times the outer diameter of tube, R = 1.5 D. Stainless steel elbow refers to its short radius of curvature radius equal to the pipe diameter, R = 1.0 D. Stainless steel bend diameter (D, R for the radius of curvature).
5 if according to the grades of pressure points: about seventeen kinds, and American standard pipe is the same, there are: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, SCH100, Sch120, Sch140, Sch160, XXS; One of the most common is two kinds of STD and XS.

Technical requirements:

1. Because most is used for welding pipe fittings, in order to improve the welding quality, end car into groove, leave a certain Angle, with a certain edge, this one is more strict, how thick, Angle deviation range for how much and there are rules. The surface quality and mechanical properties of the basic and the pipe is the same. In order to convenient welding, pipe fittings and connected pipe steel grade is the same.

2 is all the fittings are after surface treatment, the internal and external surface of iron oxide by shot blast spray drop, then coated with anticorrosive paint. This is to export demand, moreover, to prevent corrosion in domestic is for the convenience of transportation, have to do this work.

3 is the requirement for the packaging for small pipe fittings, such as export, you need to do the wooden case, about 1 cubic meters, the specified number of stainless steel elbow in the box about no more than a ton, the standard allows suit, namely large sets of small, but the total weight not more than 1 ton. For big y is a single package, like 24 "must be a single package. Another is the packing mark, mark is to indicate the size, steel grade, batch number, trademarks, etc.

Source: Yaang Pipe Industry Co., Limited (www.yaang.com)

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