Pipe Flange

Forging,welded

Production Method

0.25Mpa~25Mpa

Pressure

DN10~DN4800

Dimension

Carbon Steel;SS304;SS321;SS316

Material

Characteristics

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. They are preferred over welding neck flanges by many users buy to their lower initial cost, but final installation cost is probably not much less than that of the welding neck flange because of the additional welding involved.

6) Slip-On Flanges

The threaded flange is similar to the slip-on flange, but the bore is threaded. Its chief merit is that It can be assembled without welding, explaining its use in low pressure services at ordinary atmospheric temperatures, and in highly explosive areas where welding create a hazard.

5) Threaded(Screwed) Flanges

The welding neck flange is normally referred to as the "high up" flange. It is designed to transfer stresses to the pipe, thereby reducing high stress concentrations at the base of the flange. The welding neck flange is the best designed butt-welded flange of those currently available because of its inherent structural value.
It is expensive because of the design.

4) Welding Neck Flanges

The counter bore is slightly larger than the O.D. of the matching pipe, allowing the pipe to be inserted into the flange similar to a slip-on flange. The diameter of the smaller bore is the same as the I.D. of the matching pipe a restriction is built into the bottom of the bore which sets as a shoulder for the pipe to rest on. This eliminates any restriction in flow when using a socket welding flange.

The socket welding flange is similar to a slip-on flange except it has a bore and a counter bore dimension.

3) Socket Welding Flanges

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

2) Blind Flanges

The lap joint flange is practically identical to a slip-on flange except it has a radius at the intersection of the bore and flange face. This radius is necessary to have the flange accommodate a lap joint stud end.

1) Lap Joint Flanges

weldedWhen optimal product longevity is desired our metal flange is the product to choose. Made from galvanized metal this flange may be used in both standard and custom configurations. Our uniquely capable metal flange is available in two standard sizes. The small size metal flange and our large size metal flange. Should you have a special size or product design requirement don't hesitate to let us know and we will custom fabricate a metal flange according to your particular specifications.

DIN Standard of Flange
JIS Standard of Flange
ASME,ANSI,BS Standard of Flange
Stainless steel flange
Carbon steel flange