Difference and relationship among nominal pressure, test pressure and working pressure
Classification:
Release Time：2017-06-28
1. Nominal pressure (1) Nominal pressure-the compressive strength of the product at the reference temperature, expressed in PN, unit: MPa. (2) the reference temperature: material difference, the reference temperature will be different. For example, the reference temperature of steel is 250°C(3) and the nominal pressure is 1.0Mpa, which is marked as PN 1.0Mpa 2. Test pressure (1) The pressure for strength test of the product is expressed as Ps. (2) The test pressure is 4.0Mpa, which is recorded as Ps4.0Mpa. 3. Working pressure (1) The pressure on pipes and fittings under normal conditions is expressed in Pt. (2) t
1. Nominal pressure
(1) Nominal pressure-the compressive strength of the product at the reference temperature,PNIndicates that the unit is:MPa .
(2) the reference temperature: material difference, the reference temperature will be different. For example, the reference temperature of steel is 250 °C
(3) Nominal pressure1.0Mpa, marked: PN 1.0Mpa
2. Test pressure
(1) The pressure of the strength test of the product,.PsRepresentation.
(2) Test pressure4.0Mpa, recorded:Ps 4.0 Mpa.
3. Working pressure
(1) The pressure of pipes and fittings under normal conditions is expressed by Pt.
（2） t ×10 = The maximum working temperature of the product.
(3) The maximum temperature of the medium is300°CWorking pressure10Mpa, recorded:P 30 10Mpa.
4. The relationship between test pressure, nominal pressure and working pressure is:PS> pn> PT
The nominal pressure of the valve refers to the design working pressure of the valve, and the pressure level is divided according to national standards.
The working pressure of the valve is the actual pressure of the user in the application environment and should be less than the nominal pressure of the valve.
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2026/02/28
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