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Introduction to the material of instrument pipe fittings and instrument jointsRelease Date: April 10, 2018
If there is no corrosion or emblem corrosion medium, use No. 20 steel, generally use 1Cr18Ni9Ti and 316 for the corrosive process medium, and 316L for the highly corrosive process medium. In addition, instrument pipe fittings of different pressure levels have constant outer diameters, increased wall thickness, and reduced bore diameters. Therefore, it should be noted that the appearance of instrument connectors used in different process media and different pressure levels is very similar, or even completely the same. Be very careful not to use it wrong. Generally, it is strictly classified and stored in the warehouse. 7 ～ 8 MPacompressed air. Such as regulating valve joints, instrument compressed air piping joints and pneumatic instrument joints, etc., the material is No. 3 steel or copper, the surface is chrome-plated, the pressure level of the pipeline is 1 ~ 0MPa. Although the types of this type of instrument connector are complex, each connector has a special purpose and is generally not easy to use. Even if it is used incorrectly, it will not have a large impact on the entire process. The third type of connector is to protect cables, wires, and compensation leads. Such as the instrument electrical connector and metal hose connector, it does not withstand pressure, but only to ensure that the wires it protects from mechanical damage. The instrument pipe fittings are made of No. 3 steel, and the surface is galvanized or stainless steel.
Instrument joints are also called instrument pipe fittings, including meter joints, meter pipe joints, meter valve joints, meter source connection joints, meter electrical joints, metal hose joints, etc. It has many varieties and different specifications, and each instrument connector has its own function. According to the circulating medium, the meter connector can be divided into three types. The first type of instrument connector media is process media, that is, this connector directly contacts the process media. Such as the meter connector, meter valve connector, meter pressure pipe connector and meter source component connector. This type of connector has higher requirements for its material. Generally higher than the material of the process pipe. This type of joint is characterized by different materials for different process media.