First, in order to prevent the deformation of the cast iron plate, when hoisting the cast iron plate, four steel wires with the same length should be hung on the four hanging holes of the cast iron plate at the same time, and the cast iron plate should be hung on the transportation tool smoothly.
Second, the cast iron platform should be installed in a ventilated and dry environment, and away from heat sources, corrosive gases and corrosive liquids.
3. When the cast iron platform is installed, all supporting points of the cast iron flat plate are padded with adjusting pads, and the cast iron flat plate is adjusted to the qualified accuracy by professional technicians.
Four, when using the cast iron platform, to handle the workpiece with care, don't move the rough workpiece on the cast iron flat plate, so as to avoid bumps and scratches on the working face of the cast iron flat plate.
Five, in order to prevent the overall deformation of the cast iron platform, the workpiece should be removed from the cast iron plate after use, so as to avoid the deformation of the cast iron plate caused by the long-term heavy pressure of the workpiece.
Six, cast iron platform should be cleaned up in time when not in use, and then coated with a layer of antirust oil, and covered with antirust paper, with the outer packaging cast iron flat cover, in order to prevent careless damage to the cast iron flat working face at ordinary times.
Seven, the bearing points of the cast iron pad are padded and compacted to ensure the uniform stress of each bearing point and the stability of the whole cast iron pad.
The nominal diameter of ductile iron pipe is 80 ~ 2200mm. Compared with gray cast iron pipe, it has the advantages of high strength, good toughness, thin wall, less metal consumption and higher pressure resistance. The effective lengths are 5m, 6m and 8m. According to the different wall thickness, it is divided into P grade and G grade. It is the development direction of cast iron pipe. Ductile iron pipe is made of high-quality cast iron with low phosphorus and low sulfur produced by ironmaking blast furnace, and it is cast by water-cooled metal centrifugal pipe casting machine according to the international advanced centrifugal casting and annealing technology. After annealing, socket trimming, hydrostatic test, inner wall cement lining, water mill cement lining, outer wall coating asphalt paint, drying asphalt paint, socket rust prevention treatment, marking and packaging, etc. They are treated with care.
According to relevant data, cast iron pipes have been used in people's life and production for hundreds of years. As early as the Hongwu period (A.D. 1368- 1399), cast iron pipes were used in Nanjing Wumiao sluice. Since A.D. 1644, domestic cast iron pipes have been used in Versailles, France, and have been in use ever since.
In the mid-1990s, with the improvement of production technology of cast iron pipes, metal centrifugal cast iron pipes emerged with their unique advantages such as high strength, long service life, low noise, strong fire resistance, flexibility, earthquake resistance, and renewable recycling, and were recognized by the society and the market again, and were widely used in high-rise and super-high-rise residential buildings, municipal engineering, hospitals and schools. This is the second rise of cast iron pipes. Cast iron drain pipe