Shijiazhuang copper valves and other functions for fluid control valves, from the most simple cut-off valve to a very complex automatic control system used in a variety of valves, the types and standards of complex, nominal valve diameter from the very small valve To the diameter of 10m industrial piping valve defect treatment, but the use of a period of time need to rule out obstacles and questions. Timely replacement and repair in order to better use.
1, the shortcomings Discrimination In the production practice, some casting defects do not allow repair welding, such as through the cracks, penetrating defects (wear the bottom), honeycomb-shaped pores, can not be eradicated sand slag and area of ​​more than 1625px2 shrinkage , As well as other serious shortcomings that can not be repaired by welding on both sides of the contract. In welding repair should be identified before the type of defect.
2, the drawbacks removed in the factory can usually be carbon arc gouging blow to casting shortcomings, and then use the portable angle grinder polished parts to reveal the metallic luster. However, production practice is more direct use of carbon steel electrodes to remove large current shortcomings, and use the angle grinder polished metal luster. Casting defects are usually removed, available
3, the shortcomings of the preheated carbon steel and austenitic stainless steel castings, where repair welding area
Properties:
Oxalic ACID is white crystal. Its melting point is 101-102 °C and sublimes at 157 °C.It is soluble in water,alcohol and ethyl ether. It is insoluble in benzene and chloroform. It is toxic. Pharmaceutical industry: for ring elements. Oxytetracycline. Borneol etc.;
Application:
1.Purifying agent in pharmaceutical industry, special in antibiotic medication, such as oxytetracycline,Chloramphenicol etc.
2.Precipitating agent in Rare-earth mineral processing.
3.Bleaching agent in the textile activities, wood pulp bleaching.
4.Rust-remover for metal treatment.
5.Grinding agent, such as marble polishing.
6.Waste Water Treatment, removing calcium from water.
Oxalic Acid,Oxalic Acid Crystals,Hydrated Oxalic Acid,Crystalline Oxalic Acid
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