LIDEA Solenoid Valve The main performance parameters
LIDEA Solenoid Valve The main performance parameters
Solenoid Valve The main performance parameters: nominal diameter, nominal pressure, working pressure and temperature
Solenoid Valve said that the main performance parameters for the nominal diameter, nominal pressure, working pressure and temperature.
First, DN
DN is the nominal diameter pipe system piping accessories for all size of digits to distinguish between the outside diameter with a thread or that those parts. DN is used as a reference through the round number, and processing is not exactly the same numerical size.
DN is the letters "DN" followed by a number sign. 250mm nominal diameter as shall be marked for the DN250.
Second, the nominal pressure
Nominal pressure PN is represented by figures indicate stress-related code, is a convenient reference for a round number. The same label, PN values of the same nominal diameter! "With all the attachments and the end line connection type corresponding to the same dimensions.
In China, involving nominal pressure, the sake of clarity, usually given in units of measurement, the "MPA" said. In Britain, the United States and other countries, despite the current standards have been included in the concept of a nominal, but the actual use of imperial units still in use Class. Nominal pressure and stress level as the temperature reference different, so there is no strict correspondence between the two. General correspondence between Table.
There is a Japanese standard "K" classification system, such as 10K, 20K, 40K and so on. The concept of this pressure level pressure level in the Imperial system of units of the same, but the use of metric units of measurement.
Third, the pressure - temperature rating
Solenoid Valve pressure - temperature rating is at a given temperature gauge indicated by the maximum allowable working pressure. When the temperature increases, the maximum allowable working pressure decreases. Pressure - temperature rating data at different temperature and pressure under the correct choice of flange, Solenoid Valve and fittings of the main basis for engineering design and manufacturing is also the basic parameters.
A variety of materials, pressure - temperature rating, the data, see Chapter 4, many countries have developed Solenoid Valve, pipe fittings, flanges, pressure - temperature rating standards.
1, American Standard
In the U.S. standard, steel Fiber Optic Splice ClosureSolenoid Valve pressure - temperature rating according to ASME / ANSI B16.5a-1992, ASME B16.34-1996 requirements; Iron Solenoid Valve pressure - temperature rating according to ANSI B16.1-1989 ~ B16.4-1989, ANSI B16.42-1985 provides: Bronze Solenoid Valve pressure - temperature rating according to ASME / ANSI B16.15a-1992, ASME B16.24-1991 requirements.
1) U.S. ASME / ANSI B16.5a-1992 are specified in English units and metric units of two flange size series, but listed separately for two units of the flange pressure temperature rating. Appendix D in the standard imperial units are given to determine the pressure - temperature rating method.
2) The U.S. ANSI B16.42-1985 "ductile iron pipe flanges and flanged fittings" standard set forth in the CL150 and CL300 flange ductile iron pressure - temperature rating in the standard appendix also provides a pressure - temperature rating of the development of method, its basic principles, using the scope, limitations and formulate procedures and ASME / ANSI B16.5a-1992 basically the same.
3) ASME B16.34-1966 the United States into the ASME / ANSI B16.5a-1992 Solenoid Valve flange connection in the temperature - pressure rating data. The standard flange connection Solenoid Valve pressure - temperature rating using ASME / ANSI B16.5a-1992 formulation methods. The standard lists the flange and butt weld the standard level and welded connections Solenoid Valve Solenoid Valve special class of pressure - temperature rating tables. Standard Solenoid Valve listed 100 kinds of materials were divided into 27 groups.
2, the German standards
German standard DIN2401-1977 Volume II "pipeline pressure level, steel and cast iron pipe components allowable working pressure" is a more integrated pressure - temperature rating standards. Among them, the list of seamless pipe, welded pipe, flanges, Solenoid Valve, pipe fittings and bolts of different materials under different temperature conditions allowable working pressure. The standard includes flange material 6, Solenoid Valve flange cast iron materials 4, 5 steel, forged steel 5, these are raw materials. Are carbon steel and low alloy steel, not including stainless steel. Standards defined, by choosing different materials and other raw materials, the allowable working pressure in accordance with the value and strength of the material properties of the raw materials specified in the standard at 20 and the ratio between the intensity values are calculated. Stainless steel material for pressure temperature ratings, ISO/DIS70651 "steel flange" in the additional instructions.
3, the former Soviet Union standards
The former Soviet Union standards TOCT356-1980 "Solenoid Valve and pipeline accessories nominal pressure, test pressure and working pressure range", all in compliance with CMEA standards. Standards in the former Soviet Union, a group of materials. 200 in the standard will be below the maximum allowable working pressure values are considered to work under pressure at room temperature and is equal to nominal pressure.
4, International Standards
International standards ISO/DIS7005-1-1992 "ordinary pipe flange" is the American standard ASME / ANSI B 16.5a-1992 and the German standard flanges nominal pressure level standard combined. Therefore, the pressure - temperature rating standards of the United States and Germany, respectively the two countries, the flange pressure - temperature rating of standard-setting method and the corresponding data. ISO/DIS7005-1-1992 the nominal pressure rating PN0.25, 0.6,1.0,1.6,2.5,4.0 MPA is a German flange system; PN2.5, 10,15,25,42 MPA belongs to the United States flange system. Each system pressure - temperature rating system applicable only to the respective flange standards.
5, China's national standards
National Standard GB/T9124-2000 (Appendix A) "steel pipe flanges," reference to the German DIN2401-1977 and the U.S. ASME / ANSI B 16.5a-1992 standard pressure and temperature rating of the principles and methods of formulation, the use of flange material commonly used in reference to international standards were developed for ISO/DIS7005-1-1992 two nominal series (PN0.25-4.0MPA, PN2.0-42.0MPA) flange pressure - temperature rating. Standard flange material provides 13 levels in 12 nominal pressure, the working temperature of 20-530 of the maximum allowable working Coach Bagspressure.
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