We are offering threaded flange. A threaded flange is usually confined to a special application. The main benefit of a threaded flange is that it can be assembled without welding which makes it perfect for extremely high pressure services. Sometimes a seal weld is also used in conjunction with the threaded connection of the flange. A threaded flange is unsuited for conditions involving temperature or bending stresses of any magnitude. Particularly under cyclic conditions where leakage through the threads may occur in relatively few cycles of heating or stress.