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The importance of pipeline electromagnetic stainless steel

In fluid piping systems, electromagnetic stainless steel is a control element whose main function is to isolate equipment and piping systems, regulate flow, prevent backflow, regulate and drain pressure. Since the choice of the most suitable electromagnetic stainless steel for the piping system is very important, understanding the characteristics of the electromagnetic stainless steel and the steps and the basis for selecting the electromagnetic stainless steel also become crucial. The electromagnetic stainless steel industry has so far been able to produce a full range of gate valves, globe valves, throttle valves, plug valves, ball valves, electric valves, diaphragm valves, check valves, safety valves, pressure reducing valves, steam traps and emergency disconnects. Valves and other 12 categories, more than 3,000 models, more than 4,000 specifications of electromagnetic stainless steel products; the maximum working pressure of 600MPa, the maximum nominal diameter of 5350mm, the maximum operating temperature of 1200 °C, the minimum operating temperature of -196 °C, suitable for medium For water, steam, oil, natural gas, highly corrosive media (such as concentrated nitric acid, moderately concentrated sulfuric acid, etc.), flammable media (such as stupid, ethylene, etc.), toxic media (such as hydrogen sulfide), explosive media, and radioactive Medium (metal sodium, - circuit pure water, etc.). Electromagnetic stainless steel pressure-retaining materials cast copper, cast iron, ductile iron, high-silicon cast iron, cast steel, forged steel, high and low alloy steel, stainless acid-resistant steel, Hastelloy, Inconel, Monel alloy, two-phase Stainless steel, titanium alloy and so on. And can produce a variety of electric, pneumatic, hydraulic stainless steel hydraulic drive device. Faced with so many varieties of electromagnetic stainless steel and such a variety of working conditions, we must choose the most suitable electromagnetic stainless steel pipe products installed, I think, first of all should understand the characteristics of electromagnetic stainless steel; Second, we should grasp the steps and basis for the selection of electromagnetic stainless steel In addition, the principle of selecting electromagnetic stainless steel should be followed. 1. There are two general characteristics of electromagnetic stainless steel, use characteristics and structural characteristics.   Usage characteristics: It determines the main use performance and scope of use of electromagnetic stainless steel, belonging to the use of electromagnetic stainless steel: electromagnetic stainless steel category (closed-circuit electromagnetic stainless steel, adjusting electromagnetic stainless steel, safe electromagnetic stainless steel, etc.); product type ( Gate valve, globe valve, butterfly valve, ball valve, etc.); electromagnetic stainless steel main parts (valve body, valve cover, valve stem, valve disc, sealing surface) materials; electromagnetic stainless steel transmission and so on. The Importance of Pipe Electromagnetic Stainless Steel   Structural characteristics: It determines some structural characteristics of the installation, repair, maintenance and other methods of electromagnetic stainless steel, belonging to the structural characteristics: the structural length and overall height of the electromagnetic stainless steel, and the connection with the pipeline Form (flange connection, screw connection, clamp connection, external thread connection, welding end connection, etc.); the form of the sealing surface (inset ring, thread ring, build-up welding, spray welding, valve body); valve stem structure ( Rotary rods, lifting rods, etc. 2. The steps and basis for selecting the electromagnetic stainless steel are as follows: (1) Select step 1 to clarify the use of electromagnetic stainless steel in equipment or devices to determine the operating conditions of electromagnetic stainless steel: applicable medium, working pressure, working temperature and so on. 2 Determine the nominal diameter and connection method of the stainless steel connecting pipe: flange, thread, welding, etc. 3 Determine the mode of operation of electromagnetic stainless steel: manual, electric, electromagnetic, pneumatic or hydraulic, electrical linkage or electro-hydraulic linkage. 4 Determine the material of the shell and inner parts of the selected electromagnetic stainless steel according to the medium, working pressure, and working temperature of the pipeline: gray cast iron, malleable cast iron, ductile iron, carbon steel, alloy steel, stainless acid-resistant steel, copper alloy, etc. 5 Select the type of electromagnetic stainless steel: closed-circuit electromagnetic stainless steel, electromagnetic stainless steel, safety electromagnetic stainless steel and so on. 6 Determine the type of electromagnetic stainless steel: gate valve, globe valve, ball valve, butterfly valve, throttle valve, safety valve, pressure reducing valve, steam trap, etc. 7 to determine the parameters of electromagnetic stainless steel: For automatic electromagnetic stainless steel, according to different needs to determine the allowable flow resistance, discharge capacity, back pressure, etc., and then determine the nominal diameter of the pipe and the diameter of the valve seat hole. 8 Determine the geometric parameters of the selected electromagnetic stainless steel: structure length, flange connection form and size, size of electromagnetic stainless steel height direction after opening and closing, size and number of bolt holes connected, overall electromagnetic stainless steel shape size, etc. 9 Use existing data: Electromagnetic stainless steel product catalogs, electromagnetic stainless steel product samples, etc. Select the appropriate electromagnetic stainless steel products. (2) Selection of electromagnetic stainless steel basis     While understanding the steps of selecting electromagnetic stainless steel, we should further understand the basis for selecting electromagnetic stainless steel. 1 The purpose of the use of electromagnetic stainless steel, operating conditions and operating control methods. 2 The nature of the working medium: working pressure, working temperature, corrosion performance, whether it contains solid particles, whether the medium is toxic, whether it is flammable, explosive medium, viscosity of the medium and so on. 3 Requirements for fluid properties of electromagnetic stainless steel: flow resistance, discharge capacity, flow characteristics, seal rating, etc. 4 Mounting dimensions and dimensions: Nominal diameter, connection to the pipe and connection dimensions, dimensions or weight restrictions. 5 Additional requirements for the reliability, service life, and explosion-proof performance of electromechanical stainless steel products. (At the time of parameter selection, it should be noted that if electromagnetic stainless steel is to be used for control purposes, the following additional parameters must be determined: method of operation, maximum and minimum flow requirements, normal flow pressure drop, pressure drop when closed, maximum and Minimum inlet pressure.) According to the above selection of electromagnetic stainless steel, the rational and correct selection of electromagnetic stainless steel must be detailed understanding of the internal structure of various types of electromagnetic stainless steel in order to be able to make the right choice of electromagnetic stainless steel to make the right Choice. The final control of the pipeline is electromagnetic stainless steel. Electromagnetic stainless steel opening and closing parts control the flow pattern of the medium in the pipe. The shape of the electromagnetic stainless steel flow channel makes the electromagnetic stainless steel have certain flow characteristics. This must be taken into consideration when selecting the electromagnetic stainless steel that the piping system is most suitable for installation. The following are the principles that should be followed for the selection of electromagnetic stainless steel: (1) The electromagnetic stainless steel flow channels used to cut off and open the medium are straight-through electromagnetic stainless steels with small flow resistance, and are usually selected as the electromagnetic stainless steel for cut-off and open media. Downward closed electromagnetic stainless steel (cut-off valve, plunger valve) is less preferred due to the tortuous flow path and higher flow resistance than other electromagnetic stainless steels. Where high flow resistance is permitted, closed electromagnetic stainless steel can be used. (2) The electromagnetic stainless steel for controlling the flow rate is usually selected as an electromagnetic stainless steel which is easy to adjust the flow rate for controlling the flow rate. Down-closed electromagnetic stainless steel (such as a shut-off valve) is suitable for this purpose because of the proportional relationship between its seat size and the stroke of the closure. Rotary electromagnetic stainless steel (plug valve, butterfly valve, ball valve) and flexible valve body stainless steel (pinch valve, diaphragm valve) can also be used for throttling control, but it is usually only applicable in the limited range of electromagnetic stainless steel. The gate valve is a cross-cut movement of the circular valve seat with a disk-shaped gate. It can control the flow only when it is close to the closed position, so it is usually not used for flow control. (3) Electromagnetic Stainless Steel for Diversion Shunt This electromagnetic stainless steel may have three or more passages depending on the need for commutation diversion. Plug valves and ball valves are more suitable for this purpose, so most of the electromagnetic stainless steel used for commutating shunts is one of such electromagnetic stainless steels. However, in some cases, other types of electromagnetic stainless steel can also be used for commutation diverting as long as two or more electromagnetic stainless steels are properly connected to each other. (4) Electromagnetic Stainless Steel with Suspended Particulate Media When the medium contains suspended particles, it is best to use electromagnetic stainless steel with a wiping action by sliding the closure member along the sealing surface. If the closing member's back and forth movement of the valve seat is vertical, it is possible to retain the particles, so that the electromagnetic stainless steel is only suitable for a substantially clean medium unless the sealing surface material can allow embedded particles. Ball valve and plug valve wipe the sealing surface in the process of opening and closing, it is suitable for use in media with suspended particles. At present, no matter in the petroleum, chemical, or pipeline systems in other industries, electromagnetic stainless steel applications, operating frequencies and services are ever-changing. To control or eliminate even the slightest leakage, the most important and most critical equipment is also electromagnetic stainless steel. The final control of the pipeline is electromagnetic stainless steel. The service and reliable performance of electromagnetic stainless steel in all fields is unique.

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