What problems should be paid attention to when buying elbow? Cangzhou Shenlong pipe to provide you with some suggestions to help you purchase high-quality elbow products!

First, determine the size and model of the carbon steel elbow you are buying, that is, the caliber of the elbow, and the standard, pressure grade or wall thickness of the elbow. Pressure grade and wall thickness can be converted to know a, followed by the material of the elbow, and then the corrosion problem, whether it is necessary to spray paint or sandblasting the elbow.

1. Why should we pay attention to the material of the elbow?

Some unscrupulous pipe fitting manufacturers use irregular materials, usually judged by the nickel content. Although you can use potions to distinguish, but it is obvious that this is a mistake, because small charge nickel only 7 more is impossible to distinguish, but the price of raw materials is very different, this is one of the fake. Especially 321 high nickel and 316 high nickel counterfeits are serious. Therefore, when you buy elbow, you must pay attention to the material of the elbow. In order to ensure the quality of the elbow, it is recommended that you buy it from a regular carbon steel elbow manufacturer.

2. Why should we pay attention to the size of the elbow?

Most customers have basically no technical knowledge of inspecting elbows. For example, 90 degree large diameter elbow. The conventional elbow is one and a half times the elbow. The method is R = 1.5D, but looking at the pipe fitting market basically, most production molds are 1.25D, a difference of 0.25D. It is used as a raw material for pushing elbows, that is, to save pipe, and the weight of the raw material can vary a lot, and the price can vary a lot. This is called a non-standard elbow and is much shorter than a standard elbow.

3. Why is it necessary to determine whether anticorrosive elbow is needed?

There is a wide difference in price between solution treatment and nondestructive testing, sand rolling and sand blasting, non-corrosion treatment and corrosion treatment elbow. If the customer needs preservative treatment, it must be done. Many manufacturers in the market do not perform solution treatment and 100% penetration NDT. Many of them use sandblasting instead of rolling sand, leaving out these few steps, manufacturers will greatly reduce the cost, reduce the quality of the elbow, and the price will be lower than peers, thus improving the chance of a single.

4. Why should we pay attention to the wall thickness of the elbow?

Many customers of the elbow wall thickness have a certain understanding, though sometimes elbow thickness barely reach standard, but many people will ignore the elbow after arc thickness, because in the process of elbow push system, wall thickness will appear the phenomenon of wall thickness reduction, so if the diameter is barely standards, and the back is unqualified, basically the connoisseur compared commonly understood. If manufacturers purchase thinner, natural losses will be reduced a lot, but the product will become a mere facade, the surface of the standard.

5. Which is the raw material for the production of elbow?

More manufacturers will use the seamless production method of straight seam elbow, which is the raw material for the production of elbow, that is, the weld is sanded before pushing and then the surface is sandblasted after pickling. Any sign of welding. Customers can't see the seamless nature of a straight seam elbow, and even with advanced flaw detection equipment, they can't tell that it is a straight seam elbow. This method can reduce the price of many elbow products, and the quality is greatly reduced.

The deceitful techniques of many bad manufacturers emerge in endlessly. These are the problems that must be paid attention to when buying elbows. Hope to help you buy real material elbow products!

Cangzhou Shenlong Pipe specializes in the production of steel pipe and pipe fittings, including elbow, tee, reducer, etc., the product quality is guaranteed, can arrange SGS inspection, is the first choice for some large projects.