Protection measures for weak points of stainless steel pipe fittings

1. Stainless steel pipe fittings shall start from the pipe material and strictly control the quality of raw materials.

Strict on-site inspection shall be carried out for stainless steel pipes and fittings. To ensure that the materials meet the requirements. In terms of material selection, comprehensive consideration shall be given to economy and function. Under special operating conditions, austenitic stainless steel with high nickel content, duplex stainless steel, titanium and titanium alloy, glass fiber reinforced plastic, etc. with stronger corrosion resistance can be considered. When selecting materials, appropriately increase the corrosion allowance of pipes and stainless steel tee fittings to meet the service life requirements of the pipeline system.

2. Surface coating protection

At present, for the corrosion of stainless steel pipe fittings in the environment, in addition to selecting materials with strong corrosion resistance, the corrosion resistance can also be improved by coating the surface of stainless steel pipe fittings. To solve the problem that the surface of stainless steel pipe fittings is relatively smooth, and the adhesion of conventional anti-corrosion coatings for stainless steel reducers on its surface is relatively poor, an effective coating for stainless steel anti-corrosion in marine environment, epoxy powder coating, has been developed. The coating is a new type of coating which is completely solvent free and is sprayed into a film in the form of powder.

On the premise that the stainless steel head material meets the requirements, the corrosion of stainless steel pipe fittings in complex marine environments such as high temperature, high humidity, high salinity sea wind, salt spray, seawater splash, etc. is mainly caused by chemical corrosion and electrochemical corrosion caused by chloride ions. The corrosion of stainless steel pipes can be inhibited or eliminated by changing the way of pipe surface treatment, selecting materials with stronger corrosion resistance, coating on the surface of stainless steel pipe fittings or electrochemical protection. It is hoped that the above methods will be of great help to similar projects in the future.