Plug-welded instrument root valve
Thread Content
The root valve of pressure instruments requires a socket weld connection method, but the pipeline needs to be pickled. The immersion acid cleaning immediately damaged the valve. How can this contradiction be resolved?
The immersion acid cleaning immediately damaged the valve; I want to know which part of the valve was damaged as a result of the acid cleaning
[url=forum.php?mod=redirect The construction team threw the pipe along with the entire valve into the pickling tank
What material are the valve core and valve body made of?
The valve body is made of stainless steel; at the installation site, the handwheel and the screws and nuts used to fix it were damaged
You said it’s broken – what does that mean, broken? Was it damaged due to washing or from being bumped?
The handwheel and nut are not made of stainless steel, so they got damaged during cleaning
The valve is located at the pressure tapping point in the process pipeline; its model is Z61H. After welding, a hydrostatic test was conducted, and then the construction team sent the pipeline for pickling. Upon returning from pickling, it was found that the handwheel area had been damaged during the pickling process
The handwheel can be replaced, but it’s bad when the new one breaks
This is caused by the fact that the materials of accessories such as the handwheel of the root valve are not consistent with those of the valve body. The solution is to carry out acid cleaning on the pipes and valves separately; the valves cannot be put into the acid cleaning process as a whole, or else fully acid-resistant root valves should be used.