The installation method of stainless steel pipes is the same as that of ordinary carbon steel, and some processes have the following process requirements.
1. Stainless steel pipes should not be in direct contact with other metals for hoisting and should be padded with non-metallic materials such as wood boards or rubber boards.
2. Stainless steel pipes are not allowed to be cut with ordinary grinding wheels, but stainless steel special grinding wheels or plasma cutting should be used.
3. During tack welding of stainless steel pipes and fittings, the inner side of the weld should be protected with argon.
4. Arc starting and cratering, and arc starting to adopt reflow method and arc crater should be filled in arc crater. Arcing must be completed within the groove, and arcing and arcing on the surface of the base metal of pipes and pipe fittings is prohibited. If defects such as air holes and cracks are found at the arc start and end arc, they should be cleaned up in time.
5. For the connection of stainless steel pipes, pipe fittings and stainless steel pipes, pipe fittings and non-stainless steel pipes, and pipe fittings, the pipes and cavities of the welded butt joints should be filled with argon protection before bottoming welding, so that argon tungsten arc welding can be carried out.
6. The arc starting and ending points of multi-pass multi-layer welding should be staggered from each other.
7. When stainless steel materials are continuously welded, the interlayer temperature shall not exceed 60°C.
8. The weld seam at the joint of the pipe connection shall be pickled and passivated after welding.
9. The water pressure test of stainless steel pipes has certain requirements on water temperature and water quality, and the water temperature must not be less than 5℃; the chloride ion content in the water must be greater than 25Pmm
Post time: Jul-04-2023