CE Certification Flange Fittings Factories – Lap Joint Flanges – DS PIPE
CE Certification Flange Fittings Factories – Lap Joint Flanges – DS PIPE Detail:
Description
Lap Joint Flanges are a less requested type of flange with an extended hub and a machined radius at the base of the flat face. This curved radius allows for the placement of a pipe fitting known as a stub end.
This type of flange is made to saddle over stub end fitting for rotation. The pair are an excellent choice for situations which require a constant removal and re-installation in order to inspect the connection. This combination allows for the rotation of the lap joint over the stub end for accurate bolting.
Lap joint flange with a stub end and the radius on the face, below:
The hubs are typically taller than a slip on style and can be modified per your requirements. Slip ons in higher pressure classes are often made with the height of a lap joint for a better connection. If the hub height is not a concern and a lap joint is not readily available, customers will sometimes opt for a slip on made to a lap joint style with a machined hub.
Often times, a stub end will be made of a special material grade (nickel alloy), with the lap joint consisting of basic carbon or commodity stainless, in order to reduce the overall cost of the connection. Naturally, we recommend that both items are of the same grade for the purposes of uniformity, but your application will determine what’s best and/or necessary.
Lap Joint Flanges must be used with their associated stub end. The stub is welded to the pipe and the Lap Joint then works as a backing ring. The main advantage of this type of flange is that the bolt holes can be aligned with the matching flange after the welds have been completed. A Lap Joint Flange is not suitable for areas with high external or dynamic loads. A Swivel Ring Flange should be used for this type of application.
China leading Lap Joint Flanges manufacturer (www.dingshengflange.com)
one-stop OEM and manufacturing for Lap Joint Flanges in Stainless Steel
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