Lap Joint Flanges

INTRO

Lap Joint Flanges comprise a stub end butt-welded to the pipe and a loose backing flange that slides over it, these flanges address the need for frequent dismantling and maintenance.

They solve issues related to welding complexities and material compatibility by allowing the backing flange to be made from a more affordable material like carbon steel, while the stub end matches the pipe’s grade.

This design not only facilitates easier assembly and disassembly but also reduces costs without compromising functionality. Ideal for systems where space is constrained and frequent access is necessary,

Standard：
GB/T9119-2010 HG/T20592-2009 HG/T20615-2009 DIN ASME BS JIS
Material：
304：F304 S30408 S30408II S30408III S30400
304L：S30403 S30403II 30403 30403II
316L：31603 31603II 31603III
2507（F53） 2205（F51） TP310S（06Cr5Ni20） TP321（06Cr18Ni11） S22053III=2205III T321-32168=321

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DESCRIPTION DOWNLOAD

Lap joint flanges feature a flat face and are always used in conjunction with a stub end.
A lap joint flange slips over the pipe and seats on the back of the stub end and the two are kept together by the pressure of the bolts.
The use of lap joint flanges in combination with stub ends is a cost-effective solution for stainless steel or nickel alloy pipelines, as the material of the lap joint flange can be of a lower grade (generally carbon steel) than the material of the stub end (which has to match the pipe grade, as in contact with the conveyed fluid).For more information, please see the download section on the right.

Why Choose Our Lap Joint Flange?

Cost-Effective: Reduces expenses by combining a carbon steel backing flange with a high-grade stub end.
Easy Maintenance: Designed for quick disassembly, ideal for systems requiring frequent maintenance.
Versatile Material Options: Offers flexibility with material choices, allowing customization based on application needs.
Space-Saving Design: Perfect for installations in tight spaces where traditional flanges are impractical.
Durable and Reliable: Built to withstand demanding environments, ensuring long-lasting performance and corrosion resistance.

Frequently Asked Questions (FAQs)

What are lap joint flanges used for?

Applications where ease of alignment and assembly is crucial, such as in piping systems with frequent disassembly or inspection.

What are the benefits of using lap joint flanges?

Ease of installation and alignment, ability to accommodate pipe misalignment, and the flexibility of using a backing flange to match different pipe sizes or configurations.

How do lap joint flanges differ from other flange types?

Consist of two parts: a loose backing flange and a lap joint flange, allowing for easier alignment and adjustments without welding.