The cooling water pipe 42 stainless steel tube and 38 stainless steel pipe butt joint, installation field work for about 3 months, found leakage phenomenon, ask which expert how to solve this problem, welding before welding what to improve? How to improve it? What are the main points to be tested after completion of welding, and what specific tests are needed?
Two pipe welding contact surface is too small, should be linked, if the sleeve, then the solder is only sealed, able to resist external force. In your current case, the solder should be supported and sealed at the same time, and there is no leakage proof that the seal has been completed, but once it has an external force, the seal and support are destroyed at the same time.
Concrete methods: increase 1 concentric, different diameter, big small head pipe fittings, so that it can complete the same diameter welding, eliminate leakage; welding to be completed by argon arc welding, reduce porosity and slag welding defects.
The joint polish and butt if pressure then it is best to use argon arc welding is the best advice with a concentric size reducer with grinder
