Flange in the oil and industry above the application is very common, we can see the use of butt welding flange in various categories of industry. However, the use of welding flange is the need to have a lot of attention, these attention is the need to pay attention to. what are the fundamental co

Although chemical cleaning can make the appearance reach a certain degree of cleanliness and roughness, but its anchor lines are shallow and easily pollute the situation.Damage welding is to put two plastic-coated pipes directly in the non-destructive welding parts, and it can be directly welded by