HENAN SHUNYING

NEWS

Why does the bellow expansion joint leak?

2020.04.02

The shortcomings of wavy patterns are specifically manifested as holes. Leakage after welding, the welding holes are caused during the entire welding process; pickling passivation, total range, storage and leakage, the welding holes are in the whole process of pickling passivation or air tightness caused by the whole process of compressive strength inspection. Some pores are caused by the continuous cleaning of the residual acid in the faults and the corrosion inhibition. In order to reduce and avoid the formation of such holes, we must pay attention to the following problems at many levels throughout the welding process:

1. Appropriate argon maintenance. Nitrogen and oxygen in the air are prohibited from penetrating into the solution tank to participate in chemical changes.

2. Definite and effective reverse side aspect ratio to prevent un-melted and collapsed conditions.

3. The compensator should meet strict welding standards. Choose a moderate amount of welding current, welding rate and single pulse frequency.

4. It is forbidden to invest funds in welding of raw materials such as shrinkage of the components, relatively severe contamination, uneven wall thickness and significant scratches.

5. The actual production workshop should be kept clean. In the air, very large particles of dust are not allowed to shake, and 60 to 77 of the dustproof soil is reflected in the metallurgical industry during the entire welding process.

6. Strictly carry out cleaning before welding. In the welding parts of steel parts, the water in the residual cleaning material and the water in the air are not allowed to penetrate into the welding metal material with the O molecular structure in the waterproofing part.

7. Workers must have labor protection equipment. Dirty rubber gloves, oil-stained cotton yarn, etc. must not touch the welded parts of steel.

Henan Shunying New Energy Co., Ltd. Is a production-oriented enterprise that integrates R & D, production, and sales of pipe fittings. It has many years of experience in designing pipe products and strong manufacturing capabilities of pipe supporting equipment. Leading products include rubber dismantling joint, bellow dismantling joint, flexible metal hose, dismantling joint and other products. Widely used in petroleum, chemical, natural gas, electric power, heating, pharmaceutical, smelting, municipal and other industries