Degreasing method for stainless steel pipes and fittings:
1. Degreasing method of stainless steel pipe
Since the stainless steel pipe only needs to be degreased, in addition to the degreasing method of the carbon steel pipe mentioned above, the large-diameter pipe can also be degreased by wiping. It is not suitable to use cotton yarn when degreasing by wiping method, and use cloth, silk, glass fiber fabric, etc. whose fibers are not easy to fall off. Longer pipes can be scrubbed with a clean wire tie with a two-way drag to remove oil on the inner wall of the pipe. After degreasing, the surface of the degreasing part must be carefully inspected. It is strictly forbidden for the fibers of the organic fabric to fall into and adhere to the surface of the degreasing part. After the inspection is passed, the nozzle should be blocked immediately.
2. Degreasing method of stainless steel pipe fittings and valves
Inject carbon tetrachloride into the container, and soak the stainless steel pipe fittings and valves. Do not overfill when filling, and it is best to keep the liquid level at a distance of 200mm from the top of the container to prevent carbon tetrachloride from overflowing and causing pollution or personal injury. Because carbon tetrachloride is toxic and easy to volatilize, the operator should stand in the upwind position when injecting liquid to prevent poisoning by inhaling carbon tetrachloride. Then cover the container, soak it for 1h to 2h, take out the pipe fittings and valves, dry the inner and outer surfaces of the pipe fittings and valves with a silk cloth, and then air-dry them naturally. After the inspection is qualified, the pipe fittings and valves are packaged and sealed with plastic sheeting.