Product News
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Improving the corrosion resistance of 304 stainless steel thick-walled tube surface
304 stainless steel thick-walled tube weld contrast before and after surface treatment and processing show that: this method can get rid of scale and temper color. When people raise the 304 stainless steel thick-walled tube surface oxide layer of chromium oxide content, the structure of the oxide...Read more -
Pipeline weld inspection process
Pressure pipe weld appearance basic requirements Before pressure pipeline do the nondestructive testing, visual inspection of weld inspection ruler should meet the requirements. General requirements for pressure pipe weld appearance and surface quality of welded joints are as follows: welding sho...Read more -
Pipe quenching and tempering
Pipe quenching is heated to above the critical temperature, holding time, and then quickly into the hardening agent to a temperature suddenly decreased to a rate greater than the critical cooling rate of rapid cooling, martensite is obtained based not equilibrium microstructure heat treatment met...Read more -
Heat pipe process
The process of the heat pipe: heat pipe is generally a hollow cylindrical tube, which part of the space is filled with an easily evaporating liquid. Always maintain the vacuum state in the tube, while similar among the evaporation of the liquid temperature and ambient temperature. When heat is ab...Read more -
Oil pipeline leak detection technology and application
The leak is the main oil pipeline running failure. Especially in recent years, the pipeline is to punch the Stolen well corrosion perforation resulting in the spill happened quite frequently, seriously interfere with the normal production, causing huge economic losses, only Shengli Oilfield annua...Read more -
Lifetime of spiral steel pipe
The lifetime of spiral steel pipe has relationship with decarburization, if the surface decarburize, surface strength and wear resistance will reduce the direct impact on the life of daily use. In the heat treatment process, it should be to try not to let the inner and outer walls and exposed to ...Read more