Lap Joint Flange hot sales from China factory

Lap joint flanges are available in many sizes and classes; they are also
suitable for elevated temperatures and pressures.
Lap joint flanges have a beveled edge on their inside diameter and fit over a
pipe. They are most commonly used with a stub end, which is typically welded to
the pipe, leaving the lap joint free to rotate around it. Lap joint flanges are
especially useful because they eliminate the possibility of issues with bolt
hole alignment. They are often used in applications that require frequent
dismantling. JSFITTINGS offers lap joint flanges in accordance with DIN EN
1092-1/02, ASME B16.5, and EN PN 10, available in both carbon steel and
stainless steel.

What is a Lap Joint flange?
Lap Joint flanges are sometimes referred to by other names, including:

Stub end flange
Loose flange
Backing flange
Vanstone and Backing Ring
Van Stone flanges.
A lap joint flange (LJF) is an assembly of two elements involving a stub end
and a lap joint ring flange (also called a ‘lap joint flange’). To be
technically correct, the stub end is not part of a lap joint flange. However, a
lap joint flange is always used in conjunction with a stub end, so both parts
are often collectively referred to as a ‘lap joint flange’.

Lap joint flanges are suitable for piping systems, allowing easy disassembly,
while rolled angle rings are suitable for structural applications to create
curved or rounded shapes within various structures.

Lap Joint flanges are very similar to Slip On flanges.

However, Lap Joint flanges include a radius at the intersection of the flange
face that is made to accommodate the flared portion of the Stub End, making it
only compatible with Stub Ends.

Materials for Lap Joint flanges and Lap Joint Stub Ends vary and may even
differ in a single implementation to allow for greater cost flexibility.

Materials typically used for Lap Joint flanges include a range of stainless
steel, carbon steel, and other alloy materials.

Lap Joint Flange ASME B16.5

Lap joint flanges are available in many sizes and classes; they are also
suitable for elevated temperatures and pressures. Generally, a lap joint flange
can be used for the same applications as a welding neck flange.

These flanges are available in common dimensions like other flange types,
making it easy to integrate them into existing piping systems or use them
alongside other piping components.

Stub Ends also match both pipe material and wall schedule to maintain both
inside and outside diameters of your piping process. This style is typically
used in engineered piping systems with critical wall thickness requirements.

The advantages of the lap joint flange design are:
1. Inexpensive.

2. Well-suited for corrosive applications.

3. Requires only a single full penetration butt weld.

4. Only the stub end has contact with the process medium

5. It can be easily adjusted to align with the mating flange (the flange can be
rotated until the bolt holes align).

6. It is available in almost all pipe diameters.

7. Ideal for systems where frequent disassembly of the flange is required,
e.g., when cleaning or inspection is required.

There are some limitations on the lap joint flange’s usage, mostly due to its
bulkier multiple-component design. Lap joint flanges cannot be used for small-
sized piping.
As a leading manufacturer of carbon steel pipe fittings and flanges across
China, JSFITTINGS has more than 35 years of experience serving industries of
all sizes. Our expert sales analysts are available today to help you choose the
ideal lap joint flanges or rolled angle rings for your needs.

Contact us today to learn more about our selection of high-quality steel
flanges.

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