Home > News > Industry news > The difference and relationship between nominal pressure, test pressure and working pressure
News
company news
Exhibition news
Industry news
Certifications
Contact Us
Cowinns Industry Equipment Co.,Ltd
No.127 Room No.748 Changjiang Road,High-Tech District,
Suzhou City, Jiangsu Province, zip:215128 China
Tel:+86 512 6878 1993 
Fax:+86 512 6818 4193
Mob&what's app:+86 153 0620 9257 
Email:info@cowinns.com
www.cowinns.com
Contact Now
News

Introduction to PID Diagram Knowledge of Valve Industry

Introductionto PID Diagram Knowledgeof Valve Industry PID diagram is thetechnical core of factory production. Whether it is an engineer from a designi...

The difference between DBB, DIB-1, DIB-2

Two types of seat sealing structures commonto trunnion mounted ball valves. 1. Double block and bleed valve A valve with two valve seat sealing pairsc...

True Meaning of Double Block and Bleed

It’s time to do maintenance ona section of process. You don't want to shut down the entire facility, so youdecide to block off and depressurize just ...

18''RF WCB Butterfly valve

Customized top connection dimensions 18'' RF WCB butterfly valve  supplied to power plant service for high temperature steam pipeline 

The instruction of pneumatic actuators

First.Overview of pneumatic actuators Pneumaticactuators are actuators that use air pressure to drive opening and closing or controlvalve valves. They...

Check valve the most important valve in the process system

Checkvalve: the most important valve in the process system Mainfunctions and functions of check valve: Theyonly allow fluid to flow in one direction. ...

Equinor’s ambition in floating offshore wind

Equinor is planning to merge offshore wind and fossil energy exploitation with the Hywind Tampen project. The Norwegian company wants to further devel...

Gaskets Are Not Created Equal

Gaskets are near the bottom of the food chain of valve components; trim, body materials and packing seem to get a lot more press. But gaskets serve an...

Briefly describe the relationship between valve diameter and medium flow rate

Briefly describethe relationship between valve diameter and medium flow rate The flow rateand flow rate of the valve mainly depend on the diameter of ...

China (Shanghai) International Fluid Machinery Exhibition (2)

China (Shanghai)International Fluid Machinery Exhibition (2) The China(Shanghai) International Fluid Machinery Exhibition is one of the mostsignifican...

News

The difference and relationship between nominal pressure, test pressure and working pressure

COWINNS COWINNS 2022-08-31 16:58:29
The difference and relationship between nominal pressure, test pressure and working pressure

1. Nominal pressure

(1) Nominal pressure - the compressive strength of the product at the reference temperature, expressed in PN, unit: MPa

(2) Reference temperature: Different materials have different reference temperatures. For example, the reference temperature of steel is 250°C

(3) Nominal pressure 1.0Mpa, recorded as: PN 1.0Mpa

E.g. 10'' BW 900LB check valve nominal pressure is 900LB

2. Test pressure

(1) The pressure for the strength test of the product, expressed in Ps.

(2) The test pressure is 4.0Mpa, denoted as: Ps 4.0Mpa.

3. Working pressure

(1) The pressure that pipes and fittings are subjected to under normal conditions, expressed in Pt.

(2) t × 10 = maximum working temperature of the product.

(3) The maximum temperature of the medium is 300°C, and the working pressure is 10Mpa, denoted as: P 30 10Mpa.

4. The relationship between test pressure, nominal pressure and working pressure:

    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 the standard.

  The working pressure of the valve is the actual pressure of the user in the application environment, which should be less than the nominal pressure of the valve.