A variety of elbow grades you understand?
Release time:
Dec 04,2020
Elbow is commonly used in plumbing installation of a connection with pipe fittings, used for pipe bend connection, used to change the direction of the pipe.
Other names: 90 ° elbow, right angle bend, love bend, stamping elbow, pressing elbow, mechanism elbow, welding elbow, etc.
Purpose: Connect two pipes with the same or different nominal diameters to make the pipeline turn 90 °, 45 °, 180 ° and various degrees.
Bending radius less than or equal to 1.5 times of pipe diameter belongs to elbow, greater than 1.5 times of pipe diameter belongs to elbow.
1. As most pipe fittings are used for welding, in order to improve the welding quality, the ends are beveled, leaving a certain angle and with a certain edge. This requirement is also relatively strict. There are regulations on how thick the edge is, how much the angle is and the deviation range. The surface quality and mechanical properties are basically the same as those of the pipe. For the convenience of welding, the steel of the pipe and the pipe to be connected are the same.
2, that is, all the pipe fittings have to undergo surface treatment, the inner and outer surface of the iron oxide by shot blasting, and then coated with anti-corrosion paint. This is for export needs, and moreover, in order to facilitate transportation and prevent corrosion and oxidation at home, we must do this work.
3, is the packaging requirements for small pipe fittings, such as export, you need to make wooden boxes, about 1 cubic meter, the provisions of the number of elbows in this box can not exceed one ton, the standard allows suit, that is, large sets of small, but the total weight is generally not more than 1 ton. For large pieces y need to be individually packaged, like 24 "must be individually packaged. Another is the packaging mark, marking is to indicate the size, steel number, batch number, manufacturer's trademark, etc.
1. The production method can be divided into pushing, pressing, forging, casting, etc.
2. According to manufacturing standards, 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: can be divided into long radius elbow and short radius elbow. Long radius elbow refers to its radius of curvature is equal to 1.5 times the outer diameter of the pipe, that is, R = 1.5D; short radius elbow refers to its radius of curvature is equal to the outer diameter of the pipe, that is, R = 1.0D. (D is the elbow diameter and R is the radius of curvature).
4. According to the pressure level, there are about 17 kinds, which are the same as the pipe standards in the United States, including: Sch5s, Sch10s, Sch10, Sch20, Sch30, Sch40s, STD, Sch40, Sch60, Sch80s, XS;Sch80, SCH100, Sch120, Sch140, Sch160, XXS; Among them, STD and XS are the most commonly used.
5. According to different shapes and uses, it can be divided into: groove elbow, ferrule elbow, double bearing elbow, flange elbow, reducing elbow, dull seat elbow, internal and external tooth elbow, stamping elbow, push elbow, socket elbow, butt welding elbow, inner wire elbow, etc.
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