What is the difference between PN series and Class series of steel pipe flanges
Steel pipe flanges are a common component used to connect pipes. They are usually used to connect two pipes together or between pipes and equipment. There are various specifications and types. Among them, PN series and Class series are two common standards. HEBEI CANGRUN PIPELINE EQUIPMENT CO., LTD. will introduce the difference between these two series and their applications.
1. PN series
The PN series flange refers to the flange manufactured according to the European standard EN 1092-1. It uses the PN pressure level as the unit. PN refers to the nominal pressure of the flange, which is the maximum pressure that the flange can withstand. PN series refers to the nominal pressure series of steel pipe flanges, which are divided into nine grades: PN2.5, PN6, PN10, PN16, PN25, PN40, PN63, PN100, and PN160. The unit of PN series is megapascal (MPa), and each grade corresponds to a different pressure value. For example, PN10 means the nominal pressure is 1.0 MPa, and PN100 means the nominal pressure is 10.0 MPa. PN series flange connection is mainly suitable for pipeline engineering in chemical industry, petroleum, machinery, metallurgy, electric power, city gas and other industries. In these industries, PN series flange connections have a wide range of applications. For example, in the chemical industry, PN series flange connections can be used to transport various chemical media, such as gas, liquid, solid, etc. In the mechanical industry, PN series flange connections can be used to transport various lubricants, fuels, gases, etc.
2. CLass series
Class series flanges refer to flanges manufactured according to American standards, which use Class pressure ratings as units. Class refers to the nominal pressure rating of the flange, which is divided into six grades: Class150, Class300, Class600, Class900, Class1500, and Class2500. The unit of the CLass series is pound force per square inch (Psi), and each grade corresponds to a different pressure value. The pressure rating of Class series flanges is Class150, which means that the nominal pressure of the flange is 150 pounds per square inch (psi), while Class2500 means that the nominal pressure of the flange is 2500 psi. CLass series flange connections are mainly used in pipeline engineering in petroleum, chemical, aviation, aerospace and other industries. In these industries, CLass series flange connections have a wide range of applications. For example, in the petroleum industry, CLass series flange connections can be used to transport various oil, gas, water and other media. In the chemical industry, CLass series flange connections can be used to transport various chemical media, such as gas, liquid, solid, etc.
Although PN series and Class series flanges have different names and units, they are basically similar in structure and function. They all consist of flanges, flange washers, flange bolts and flange nuts. The flange is the main part of the flange, which is usually round and has bolt holes for connecting with pipes or equipment. Flange gaskets are used to fill the gap between flanges to ensure the tightness of the connection. Flange bolts and flange nuts are used to fasten the flanges together. Whether it is PN series or Class series flanges, they all have high strength and pressure resistance, and can withstand high pressure and temperature working environments. They are usually used in pipeline systems in petroleum, chemical, electric power, pharmaceutical and other industries to ensure the reliability and safety of pipeline connections.
What is the difference between PN series and Class series of steel pipe flanges? PN series and Class series are two common standards for steel pipe flanges. They differ in pressure rating, but are basically similar in structure and function. According to different countries and regions, steel pipe flanges with suitable standards and pressure grades can be selected. Whether it is PN series or Class series flanges, they are important pipeline connection components, which are of great significance to the safe operation of pipeline systems.
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Author: Maria
Post time: Jul-14-2023