Flanges

Slip-on Flanges

The slip-on flange has a low hub because the pipe slips into the flange prior to welding. It is welded both inside and out to provide sufficient strength and prevent leakage. Slip-on flanges are all bored slightly larger than the O.D. of the matching pipe.

Welding Neck Flanges

The welding neck flange is normally referred to as the “high hub” flange. It is designed to transfers tresses to the pipe, there by reducing high stress concentrations at the base of the flange.

Threaded Flanges

The threaded flange is similar to the slip-on flange, but the bore is threaded. Very important that it can be assembled without welding, example its use in low pressure service at ordinary Temperatures, and in highly explosive areas where welding create risk.

Blind Flanges

The blind flange is a flange without a bore. It is used to close off the ends of a piping system and/or a pressure vessel opening. It also permits easy access to the interior of a line of vessel once it has been sealed and must be reopened.