Test standard of steel mesh skeleton composite pipe: stability treatment and demagnetization. There shall be no rust, scratch, bruise and other appearance defects affecting the use on the working surface of the steel mesh skeleton composite pipe workbench. According to the user's requirements, after the threaded holes or grooves are set on the working surface of the plate, these parts should not have bulges higher than the working surface.
The opposite two sides shall be provided with threaded holes or cylindrical holes for installing lifting facilities such as handles and rings. When designing the lifting position, the change caused by lifting shall be minimized. It shall be made of fine grained gray cast iron or alloy cast iron. The hardness of the working surface shall be HB 170-220
The working surface shall adopt scraping process, and the "3" level flat working surface can also adopt planing process. The average deviation Ra value of the surface roughness of the planing working surface according to the contour arithmetic shall not be greater than 5 um. The working surface of the steel mesh skeleton composite pipe working table shall be free of sand holes, pores, cracks, slag inclusions, shrinkage porosity and other casting defects.
The casting surface shall be cleaned with molding sand, and the surface shall be flat and painted firmly. All edges shall be blunt. On the flat working face with the accuracy level lower than "00", the sand holes with the diameter less than 15mm can be blocked with the same material, and the hardness should be lower than the hardness of the surrounding materials. There shall be no more than four blocked parts on the working surface, and the distance between them shall not be less than 80mm
