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ANSI 150 flange, the standard flange with pressure grade CLASS150 (150LB), is the most widely used pressure flange in practice, its relevant flange size requirements and technical parameters are stipulated in flange standards ASME B16.5 and ASME B16.47 and BS3293.

ANSI 150 Flange VS ASTM 150 Flange

1. Standard (Difference):

ANSI 150 flange is the manufacture standard.

Flange class 150 is the material standard.

2. Design Pressure (Similarity)

Both of their pressure is 150LBS

3. Type & Facing (Similarity):

Type: Slip-on, Weld Neck, Blind, Lap Joint, Socket Weld, Threaded.

Facing: RF, FF, RTJ

4. Installation (Similarity):

They are both class150 flanges and are suitable for American standard piping

ANSI 150 Flange FAQs

How Many Types of Flanges Are There?

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To connect diferent pipes and valves to achieve different functions, there are 6 types of common flanges as below:

Weldneck flange

Threaded Flanges

Socket-Weld Flanges

Slip-On Flanges

Lap Joint Flanges

Blind Flanges

Can We Supply Special Flanges? 

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What Kinds of Certificates We Have for Flanges? 

Today, Hebei Leading, as a group company, is not only manufacturing butterfly valves and flanges but also is optimized to meet the needs of our customers with exceptional service and superior quality in flow control industry, such as pipes, pipe fittings, and other kinds of valves, all of them comply with the international standards and requirements.