Precautions when purchasing elbows

Many customers may not know how to choose elbow when purchasing elbow. As a manufacturer who has been working hard in the field of supporting products for pipeline engineering for many years, Haihao Group shares the precautions for elbow purchasing today, hoping to help everyone.

Custom Elbows

1.Pay attention to elbow materials when purchasing elbows, and pay attention to distinguish the nickel content of materials, because defective businesses will use low nickel instead of high nickel, and cheat on raw materials. Especially the forgery of 321 high nickel and 316 high nickel is very serious.

2.Pay attention to the elbow size to avoid purchasing non-standard elbows. For example, 90 degree elbow, generally the conventional elbow is one and a half times the elbow, R=1.5D, but the mold of many merchants is 1.25D, which is 0.25D worse. A large number of such elbows flooded the market, attracting customers with low prices. Pay attention when purchasing.

Custom large size welded elbows

3.Pay attention to the fabrication of anti-corrosion elbow. The price of elbows without anti-corrosion treatment and anti-corrosion treatment varies greatly, such as solution treatment, nondestructive testing, sand rolling and sand blasting. Many manufacturers on the market do not carry out solution treatment and non-destructive testing of 100% permeability. Many of them use sand blasting instead of sand rolling. After these steps are omitted, the manufacturer will greatly reduce the cost, reduce the quality of elbows, and the price will be lower than that of peers. Customers must pay attention when purchasing.

4.Many customers have a certain understanding of the wall thickness of the elbow. Although the wall thickness of the elbow is barely up to the standard sometimes, many people will ignore the back arc thickness of the elbow, because the wall thickness will decrease in the process of pushing the elbow, so we must pay attention to it when purchasing.

5.Pay attention to the straight seam pretending to be seamless. This method is the raw material for elbow production, that is, grinding the weld before pushing, and then sandblasting the surface after pickling. Customers can’t see the seamless of straight seam elbow, and even the use of advanced flaw detection equipment can’t tell it is a straight seam elbow. This method can reduce the price and quality of many elbow products.

Large size elbow

Haihao Group is a regular manufacturer that has been working hard in the field of pipeline engineering supporting products for many years. Our products have strict quality control from raw materials to production processes. Our products include flanges, steel pipes, pipe fittings, elbows, tees, etc. After more than 40 years of testing in the market, the quality of our products has been unanimously recognized by our customers, and you can buy them with confidence. If you have any questions about the relevant products, please feel free to consult us, and we will give you professional answers.