Among the hardware accessories, the 180D elbow, as an important connection accessory, plays a decisive role in installation. 180D elbows are often used as steering nodes in stainless steel stairs and handrails. For this type of stainless steel 180D elbows, they are generally made into 5 types according to their different nodes:

1. Flanged refers to the end of the pipe convex to the inside or outside, round edge: a pipe fitting that forms a bulge or groove in the circumferential direction of the pipe;
2.Stainless steel 180D elbows with variable wall thickness refer to obvious changes in wall thickness along the length of the pipe;
3. Change straight pipes into elbows with different radius of curvature, such as 180D elbows, elbows, etc.;
4. Stainless steel 180D elbow variable diameter pipe fittings, which means that the diameter of the pipe end or a part of the pipe is reduced; pipe fittings with crimping and bottom sealing, increase the total strength of the pipe end to the outer or inner side of the pipe, or seal the end of the pipe Live fittings;
5. Change the section of the pipe fittings, according to the requirements, change the circular section to square, oval, polygon, etc.

The 180D elbow has the following 3 technical requirements:
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.

The 180D elbow is processed into:
1. Flanged refers to the end of the pipe convex to the inside or outside, round edge: a pipe fitting that forms a bulge or groove in the circumferential direction of the pipe;
2.Stainless steel 180D elbows with variable wall thickness refer to obvious changes in wall thickness along the length of the pipe;
3. Change straight pipes into elbows with different radii of curvature, such as 180 degree elbows, elbows, etc.;
4. Stainless steel 180D elbow variable diameter pipe fittings, which means that the diameter of the pipe end or a part of the pipe is reduced; pipe fittings with crimping and bottom sealing, increase the total strength of the pipe end to the outer or inner side of the pipe, or seal the end of the pipe Live fittings;
5. Change the section of the pipe fittings, according to the requirements, change the circular section to square, oval, polygon, etc.