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Loading workers should check the raw material:

1, the outer surface of the steel pipe shall not be sticky with oil (especially asphalt oil paint and other oil), otherwise it will cause a large number of unqualified products.

2. Steel pipe must be straightened after production to eliminate the internal stress of steel pipe.

3. Uneven corrosion on the outer surface of steel pipe can not be galvanized, otherwise it will waste a lot of hydrochloric acid.

4. Steel pipe in the process of transportation should not appear artificial bending.

5. For hot dip galvanized steel pipe, it is not allowed to stick the mark on the inner and outer wall of the steel pipe, so as not to cause leakage plating.


Post time: Jul-13-2022