Nominal pressure vs. maximum pressure

Nominal pressure

Nominal pressure shows the symbol PN and it allows maximum operating pressure at the given temperature. For the carbon steel valve body the working pressure for the app that is allowed is below 200. PN is also known as pressure nominal and it is used as a prefix to the flange’s pressure rates.  The nominal pressure of the valve actually refers to the design and the work pressure of the valve and this pressure level is classified according to the standards.

Maximum pressure

Maximum pressure refers to the maximum pressure at which the gas is supplied to the customer. Air pressure is maximum pressure at the sea level because the earth gravity is pulled into the air to the earth’s surface. The working method can be seen by the variety of methods such as an engineering team that performs many types of computer analysis. It performs destructive testing. Using a calculator that is given by the industry standards. The American petroleum institute is a well-known organization. It helps in defining what the maximum pressure of the pressure vessel should be.

Nominal pressure vs. Maximum pressure

1.   Nominal pressure is the pressure bearing strength of the product. It is at the reference temperature that is expressed in PN whose unit is MPa. The Maximum pressure of the globe valve is the actual pressure of the user and it functions correctly. It is within the application environment and it should be less than nominal pressure of the globe valve.

2.   Nominal pressure different materials have many reference temperatures such as the reference temperature of the steel that is 250 degrees Celsius. In Maximum pressure the max temperature is 300 degrees Celsius. Maximum pressure depends on the shape, size and pri of the vessel.

3.   Nominal pressure is recorded as 1.0 MPa as PN 1.0 MPa. The Maximum pressure is 10 MPa and it is recorded as P 1083.8 MPa.

Understanding maximum and nominal pressure

Valve nominal pressure means the symbol PN. It is the maximum allowable working pressure when it is applied at a certain pressure. For control type valves they are mixed with the carbon body. It refers to the maximum working pressure that is allowed for applications below 120 degrees Celsius.  For the cast iron valve body it is referred to with the max working pressure. The nominal pressure of the control valves is determined not only on the max working pressure but also with the max working temperature and materials. These nominal pressures are not only to satisfy nominal pressure but also to the maximum pressure.


Maximum pressure is referred to the maximum pressure that is specified by the max operating temperature. It is with the pipeline at each level for the safe operations of the pipeline system. Maximum pressure is expressed with the Pt. The nominal pressure is the compressive strength of the product at the reference temperature. It is expressed in the PN unit as MPa. It is referred to as the design pressure that is given by the mechanical strength of piping components.


Leave a Comment

Your email address will not be published. Required fields are marked *

Social Media

Get The Latest Updates

Subscribe To Our Weekly Newsletter

No spam, notifications only about new products, updates.

Most Popular

want totalk
with us?

Leave your details and one of our experts will contact you!

Scroll to Top