Since the tank body has no welds, the effective volume of the pph winding tank is 95% of the load, which is larger than the PP tank made by the traditional butt welding process and welding process. It can be understood that the difference is in the safety factor of the tank.

The safety factor of storage tank is divided into four levels, namely, level 2.0 (design safety factor 2.0), level 1.7 (design safety factor 1.7), level 1.5 (design safety factor 1.5) and level 1.3 (design safety factor 1.3). There are many factors affecting the safety factor, but the most important is the performance of raw materials. If you can't even reach the raw materials, let alone the finished equipment.

The raw materials for manufacturing storage tanks shall be provided with product quality certificates and inspection reports, and the inspection results shall comply with relevant standards. The raw material for extruding the winding groove shall be pipe grade resin, as shown in the following table.

The polypropylene winding tank body is made of granular materials, and the tank top and bottom are made of sheet metal directly. The plates also have corresponding requirements, as shown in the following table.

In addition, there are welding rods. The welding rod for hot air extrusion welding and hot air welding must be made of the same material as the base metal.

However, the manufacturers of electrodes and granular materials are certainly different. Sometimes, PPH winding tank The manufacturer needs to take the granular materials in the tank to the electrode manufacturer for processing. However, considering the actual factors, the electrode and particle materials of many PP slot manufacturers have different properties.

PP has excellent corrosion resistance, especially resistance to hydrochloric acid of any concentration, which is unmatched by metal materials (except titanium) and other resin materials. Therefore, since the early 1980s, it has been widely used to manufacture various chemical equipment, such as towers, heat exchangers, various tanks, tanks, fans, pumps, pipes, valves, etc. These equipment are widely used in petroleum, chemical industry, medicine, food and other fields. The utility model has the advantages of no pollution, no scaling, easy recycling and good application effect.

PP is polymerized by propylene gas generated from petroleum fission under high temperature and pressure. Homopolymerization and copolymerization are commonly used. The former is polymerized from pure propylene gas, and the latter is polymerized from propylene and ethylene in a certain proportion. Homopolymer has high temperature resistance and high strength, but poor low temperature resistance and good brittleness. The latter has poor high temperature resistance, but good low temperature resistance and is not so brittle. Copolymerized PP is widely used at present.

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