Slip on Flanges
Specifications : ANSI B 16.5 from 1/2" to 24" and classes150 to 2500 (complete range)
Applications : Used in quick assembly to save the cost, these are also used in less strict requirements in terms of length of pipe section.

Socket Welding Flanges
Specifications : ANSI B 16.5 from 1/2" to 24" and classes150 to 2500 (complete range)
Applications : Recommended for orifice flanges. These work as substitute for slip-on-flanges in the cases where the diameter of the tube is very small and working pressure is very high.

Lap joint Flanges
Specifications : ANSI B 16.5 from 1/2" to 24" and classes150 to 2500 (complete range)
Applications : These are primarily used when quick assembly and disassembly of pipe line section is required under limited working pressure.

Threaded Flanges
Specifications : ANSI B 16.5 from 1/2" to 24" and classes150 to 2500 (complete range)
Applications : These flanges are used in special requirements to work under high temperature and pressure, making sure no welding joint is made at the assembly.

Weld Neck Flanges
Specifications : ANSI B 16.5 from 1/2" to 24" and classes150 to 2500 (complete range)
Applications : These are mainly used on heat coupling of pipes when there is possibility of expansion of the section while bending stress on the coupling.