Why Need Weld Overlay?

- Aug 30, 2017-

Why Need Weld Overlay?

Because of high quantity of H2S, O2, erchloride and other corrosive medium exist in lots of valves and pipes which are used in deep-water drilling and coal chemical industry, so to make the equipments have better performance of anti- erosion, longer service life and lower manufacturing cost, some developed countries led by USA API adapting a manufacturing way which is weld overlay a nickel layer on the surface of low alloy valve body, valve deck, pipe fitting. In this way, drilling equipment can keep low cost of low alloy material, and the expensive nickel alloy material can used in other field.

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