Nozzle control change

There are a number of exports of carbon steel equipment, about 100 units, there are more than the equipment to take over, would like to ask how to control the deformation of the takeover
2017-05-09 Reply
When opening the nozzle hole to make a template, welding position
2017-05-11 11:15:37 Reply
Workmanship comparison
2017-05-17 09:00:37 Reply