Stainless steel elbow

Elbow pipes are bent using complete sets of bending dies. Elbow pipes are used in most mechanical equipment regardless of type, mainly for oil transportation, gas transmission, fluid delivery and other purposes, and they play a particularly important role in aircraft and their engines. Common types of elbow pipes include intermediate frequency elbow pipes, butt-welded elbow pipes, stainless steel elbow pipes, etc.

Elbow Pipe Quality Control:

1. The impact of lubrication on product quality during elbow pipe forming: In traditional elbow pipe production processes, enterprises adopt various methods to achieve better surface quality of elbow pipes, including using more advanced pipe bending machines, dies with higher strength, or lubricating products.

2. During pipe bending, the outer side of the material is under tension while the inner side is under compression, and the position of the neutral axis varies with the bending method. In compression bending, the neutral axis is located approximately 1/3 of the wall thickness from the outer wall, while in rotary bending (return bending), the neutral axis is located 2/3 of the wall thickness from the outer wall. Therefore, the rotary bending method is beneficial for bending thin-walled pipes.

3. The precision of bending dies is also one of the factors affecting the quality of elbow pipes. When manufacturing bending dies, in addition to controlling the specifications and dimensions within a certain tolerance range, users are also required to select corresponding bending dies according to the pipe diameter to be bent during use.

4. The bendability and surface corrosion condition of the pipe material itself may also affect the quality of elbow pipes. During on-site construction, operators also need to understand the material and processing performance of the pipe to be processed and judge its surface corrosion condition.

5. Under pure bending, under the action of external moment M, the outer wall of the neutral layer of the pipe is subjected to tensile stress and becomes thinner, while the inner wall is subjected to compressive stress and becomes thicker. The resultant forces N1 and N2 cause deformation of the pipe cross-section. Based on this factor, the main reasons for the decline in elbow pipe quality are RX and SX. Therefore, in GBJ235-82, clear provisions are made for the RX values and outer wall thinning amounts under various pressure grades, aiming to control the values of RX and SX so as to ensure quality.

Surface Treatment: Paint brushing for rust prevention; cold galvanizing and hot galvanizing treatments are also available.

Packaging: Wooden cases, wooden pallets or other types.

Product Brand: Renlong

Place of Origin: Yanshan County, Cangzhou City, Hebei Province