Galvanizing Pickling and Washing
1, pickling steel pipe:
1) pickling workers must wear good labor protection before work, at work to seriously check the work site has no barriers, harness is intact, to confirm the good before the work.
2) pickling Mainly pickling hydrochloric acid, the use of water to the preparation of hydrochloric acid, hydrochloric acid content of 18 to 20% more appropriate.
3) pickling work before the first understanding of the concentration of acid, temperature and the tank pickling pipe tonnage.
4) hanging pipe when the two harnesses to leave the end of the first 1.3 meters to prevent hanging bending pipe, resulting in galvanized steel pipe leakage; in the acid tank to the next tube, the pipe to tilt 15 °, the first stand under their own end to prevent spray Acid wounding.
5) Each pickling of steel pipe, the weight of 2 to 5 tons is appropriate, time 5 to 15 minutes.
6) steel pipe in the pickling to frequent vibration in the process of vibration should be flat on the acid tank of the horizontal bar stone, start the side of the harness 3 times and then start the other side of the harness 3 times, repeat twice Lifting; vibration rise angle of not more than 15 °.
7) acid tank heating, the first fixed steam tube and then open the steam valve firmly.
8) Crane into the tube, the acid tank, the impact shall not wall, to prevent damage to acid tank.
