Metal corrugated compensator 304 stainless steel material maintenance

Metal corrugated compensator 304 stainless steel material maintenance
Stainless steel surface quality, the key lies in the pickling passivation process after heat treatment, if the surface air produced in the previous heat treatment process is oxidized on the surface, or the surface organization is not uniform, then pickling passivation can not improve the smoothness and uniformity of the surface. Therefore, great importance must be attached to the heat treatment of heating or surface cleaning before heat treatment. 304 stainless steel pipe has excellent stainless steel corrosion resistance and good stress corrosion resistance. In the concentration value ≤ 65% of the boiling temperature, 304 stainless steel raw material sodium cyanide has strong corrosion resistance.
Matters in the installation use and maintenance of metal corrugated compensator.
1 . Preheater at all levels of the metal corrugated compensator structure of the down tube size is the same, but the inner tube material is different, the higher the temperature, the higher the material grade. Therefore, should carefully identify the material mark on the metal corrugated compensator, do not install the wrong .
2 . Before installation, check the type, specification and pipe support configuration of the metal corrugated compensator must meet the design requirements.
3 . Before installation, please check carefully whether the rock wool filled in the metal corrugated compensator is off. Transport or installation process of lifting may lead to rock wool off, off will lead to the operation of the equipment in this part is filled with material, resulting in the failure of the metal corrugated compensator, the equipment has nowhere to absorb the thermal expansion, the equipment will have serious deformation.
4 . Installation process does not allow welding slag splash to the surface of the bellows and make the bellows received mechanical damage.
5 . Metal corrugated compensator in the manufacturing plant has been pre-stretched, installation is not allowed to change the height of the metal corrugated compensator to compensate for the error in the installation, the installation before removing the metal corrugated compensator fixed screw.
6 . Corrugated pipe shall not interfere with other external equipment to prevent extrusion and deformation during expansion.
7 . Stop kiln maintenance should check the metal corrugated compensator inner tube wear and rock wool filling, timely measures to repair to prevent the expansion of damage.