Quality inspection of foundation slab

2022-06-22
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Quality inspection of foundation plate

quality inspection of foundation plate

scraping process shall be adopted for the working surface of foundation plate, and planing process can also be adopted for the working surface of "3" level plate. The surface roughness of planing working surface shall not exceed 5um according to the arithmetic mean deviation Ra of contour Quality inspection of foundation slab:

1 The working surface of the foundation plate shall not be divided into 3-point zigzag testing machine (wd-d3) and 4-point zigzag testing machine (wd-t) with rust, scratches, bumps and other appearance defects that affect the use

2. At present, the vanadium products supplied in this way account for nearly 9% of the total output. When the screw is baked and cooled with acetylene flame, 0% of the surface shall be free of casting defects such as sand holes, pores, cracks, slag inclusions and shrinkage porosity. All casting surfaces shall be cleaned of molding sand, with smooth surface and firm painting. All edges shall be blunt. On the flat panel working face with accuracy grade lower than "00", the sand hole with diameter of 15mm is allowed to be blocked with the same material, and its hardness shall be lower than that of the surrounding materials. There shall be no more than four blocked parts on the working face, and the distance between them shall not be less than 80mm

3. Threaded holes or cylindrical holes for installing lifting facilities such as handles and lifting rings shall be set on the two opposite sides of the foundation slab. When designing the hoisting position, it shall be considered to minimize the changes caused by hoisting

4. According to the user's requirements, after setting threaded holes or grooves on the working surface of the plate, these parts shall not have bulges higher than the working surface

5. The scraping process shall be adopted for the working surface of the foundation plate, and the planing process can also be adopted for the working surface of the "3" level plate. The surface roughness of the planing working surface shall not exceed 5um

6 according to the arithmetic mean deviation Ra of the contour The hardness of the working surface of the foundation plate shall be Hb

7. The foundation slab shall be made of grey cast iron or alloy cast iron with high quality fine particles

8. The foundation plate shall undergo stability treatment and demagnetization. Flatness of foundation plate: it can be divided into three levels: reference, master and working

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