News

News

The Products Are Sold To More Than 30 Provinces, Cities And Autonomous Regions Across The Country, And Have Been Exported To Indonesia, India, Thailand, Myanmar, Saudi Arabia, The United Arab Emirates And Other Countries.

Do you understand the various elbow grades?

Release Time:

2020-12-04

The elbow is a commonly used connection pipe fitting in plumbing installation, used for the connection of the pipe bend, and used to change the direction of the pipe.

The elbow is a commonly used connection pipe fitting in plumbing installation, used for the connection of the pipe bend, and used to change the direction of the pipe.
Other names: 90° elbow, right angle bend, love bend, stamping elbow, pressed elbow, machine elbow, welding elbow, etc.
Purpose: To connect two pipes with the same or different nominal diameters, so that the pipeline can be turned at 90°, 45°, 180° and various degrees.
A bending radius less than or equal to 1.5 times the pipe diameter belongs to an elbow, and more than 1.5 times the pipe diameter belongs to an elbow.
1. Since most of the pipe fittings are used for welding, in order to improve the welding quality, the ends are beveled, with a certain angle and a certain side. This requirement is also strict, how thick the side, how much angle and deviation The scope is stipulated. The surface quality and mechanical properties are basically the same as the pipe. For the convenience of welding, the steel grade of the pipe fitting and the pipe being connected is the same.
2. That is, all pipe fittings must be surface treated, and the iron oxide scale on the inner and outer surfaces is sprayed off by shot blasting, and then coated with anticorrosive paint. This is for export needs. Moreover, it is also for the convenience of transportation in the country to prevent corrosion and oxidation. This work must be done.
3. It is the requirements for packaging. For small pipe fittings, such as export, it is necessary to make wooden boxes, about 1 cubic meter, and the number of elbows in this box cannot exceed one ton. The standard allows sets, that is, large sets and small sets. But the total weight generally cannot exceed 1 ton. For large items, single packaging is required, such as 24″ must be individually packaged. The other is the packaging mark, which must indicate the size, steel number, batch number, manufacturer's trademark, etc.
1. According to the production method, it can be divided into pushing, pressing, forging, casting, etc.
2. According to the manufacturing standard, it can be divided into national standard, electric standard, ship standard, chemical standard, water standard, American standard, German standard, Japanese standard, Russian standard, etc.
3. According to its radius of curvature: it can be divided into long radius elbow and short radius elbow. Long radius elbow refers to the outside diameter of the pipe whose radius of curvature is equal to 1.5 times, namely R=1.5D; short radius elbow refers to its radius of curvature equal to the outside diameter of the pipe, namely R=1.0D. (D is the diameter of the elbow, R is the radius of curvature).
4. According to the pressure level: there are about seventeen types, which are the same as the American pipe standards, including: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS; Sch80, SCH100, Sch120, Sch140, Sch160, XXS; among them the most commonly used are STD and XS.
5. According to different shapes and uses, it can be divided into: groove elbow, ferrule elbow, double bearing elbow, flange elbow, reducing elbow, seat elbow, inner and outer tooth elbow, stamping elbow , Pushing elbow, socket elbow, butt welding elbow, inner wire elbow, etc.