The difference between American standard flange 1 and national standard flange is the implementation of different standards, including inner diameter, outer diameter, bolt hole center distance, quantity, diameter, thickness, height, etc
American standard flange 1
The difference from the national standard flange is the implementation of different standards, including inner diameter, outer diameter, bolt hole center distance, quantity, diameter, thickness, and height.
American standard flanges are divided into three types: butt welding with neck, flat welding with neck, and flange cover.
Corresponding to the domestic standard: HG20615-2009.