From the steel pipe flange list below, we can see that there are more than twelve categories for the types of pipe flange. Each of them, with special characters, is necessary for the relative steel pipe's good performance during the industries.          

As for primesteeltube company, we would like to divide these flanges according to common or not.

First of all, for the common types of steel pipe flange, they are:

Welding neck flanges,

Slip-on flanges,

Socket welding flanges,

Lap joint flanges,

Threaded flanges,

Blind flanges and figure-8 blanks.

In addition, except for the common type, we can see special one together:

Orifice flanges

Expander flanges

Spectacle blind flanges

Reducing flanges

Weldoflange / Nipoflange