Stainless stub end

Stainless stub end are fittings used in place of welded flanges where rotating back up flanges are desired.

Stainless steel stub end

Leading Manufacturer and Exporter of Stainless Steel Stub End such as Stainless Steel Stub Ends ASTM A403, Stainless Steel Stub End 304L, Stainless Steel Stub End 316L, Stainless Steel Stub End 317, Stainless Steel Stub End 317L, Stainless Steel Stub Ends and many more items from China.

Stainless steel stub end
ROC R16.9 2 1/2" SCH 40S
A403 WPS304L

They are also called Lap Joints and Vanstone Flared Laps. A rotating back up flange seats itself against the back surface of the Stub End. When bolts are added, the clamping action of the bolts presses the rotating back up flange against the back of the Stub End. The gasket surface of the Stub End then presses against a gasket and another gasket surface providing joints like standard flange joints.

The seal is made by the gasket surface of the stub end alone, the flange only provides the clamping pressure on the joint.

There are three different types of stub ends, Type A, B and C. Type A stub ends are machined to fit in a standard lap joint backing flange

We offer stub ends at highly competitive prices.

Lap Joint Stub End – The ‘mated’ pair to a Lap Joint Flange. Stub Ends are Fittings used in place of welded flanges where rotating back up flanges are desired. Stub Ends are typically manufactured by two methods, Type A & Type B and are available in two standard lengths , long (ANSI) or short (MSS) pattern.

Manufacturing standards of stub end:
Technical Specifications:

Petroleum, Chemical, Power, Gas, Metallurgy, Ship-building, Construction, ect.

Lap Joint Stub End

Using stub ends allows sections of the line to be opened for cleaning, inspection, or quick replacement etc, without the need to re-weld.


Common type of Butt weld pipe fittings

A common example using welded pipe fitting is a pipe reduced by concentric reducer, welded to a weld neck flange and connected to an equipment. Figure below represent complete collection of butt welded pipe fitting


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