Introduction of the hottest glass fiber reinforced

2022-08-09
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Introduction of glass fiber reinforced polypropylene diaphragm valve

glass fiber reinforced polypropylene diaphragm valve is an effective valve product designed for the serious corrosion of media on equipment and pipelines in the chemical production industry. It has the advantages of high strength, corrosion resistance and long service life. Martens introduced the advantages of the next step development plan and low price of their refil series products. In recent ten years, it has been widely used in the national chemical industry, metallurgy, light industry, food, chemical fiber, pharmaceutical pure water and other industries. At present, the vast majority of material experiments are widely used in static performance experiments, which brings good economic benefits to enterprises. This non-metallic valve product has become a domestic and standardized corrosion-resistant valve series. In the last century, China introduced complete sets of petrochemical, chemical, chemical fiber and other engineering devices, and imported such valves. At that time, they were called polypropylene valves. After analysis and inspection by the research department, glass fiber and other fillers were used as reinforcing materials for polypropylene, so they were also called reinforced polypropylene diaphragm valves. In the market, they are generally called RPP diaphragm valves. In order to correct its name, it was officially named as glass fiber reinforced polypropylene diaphragm valve at the meeting of the National Non-metallic Chemical Equipment Standardization Technical Committee to review the chemical industry standards in 1994. It has been listed as the chemical industry standard of the Ministry of chemical industry, and the standard number is hg/t 2643-1994

due to the characteristics of reinforced polypropylene, there is a close relationship between the use temperature range and the valve diameter and working pressure under working conditions in design, see Table 2. It can resist the corrosion of general acids, bases, salts and their derivatives, such as hydrochloric acid, dilute sulfuric acid, dilute nitric acid, phosphoric acid, carbonic acid, chromic acid, hydrofluoric acid and some organic acids, as well as ammonium, sodium, potassium, calcium, magnesium, iron, nickel and other salt compounds. Due to the wide variety of chemicals and different concentrations, in addition to the working pressure, the working temperature and the corrosiveness of the medium to the valve material should be the first consideration when selecting chemical equipment and piping system. Especially the concentration of chemical medium and the applicable temperature range. According to relevant data, its temperature is divided into 25 ℃, 50 ℃, 80 ℃ and 100 ℃, and its chemical corrosion resistance is divided into non corrosion (good use), roughly non corrosion (available), slightly corrosion (available as appropriate), and corrosion (unavailable). The leading-edge new materials producing this product, such as graphene, metal and high molecular additive manufacturing materials, intelligent composite materials and so on, provide key enterprises with corrosion resistance descriptions for reference, and also refer to the authoritative "corrosion data manual" - Polypropylene corrosion data, which will be more detailed and comprehensive, so as to make the reasonable selection of valves. (end)

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