Lap Joint Flanges
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Lap Joint Flanges
Lap Joint Flange (LJ Flange)
A Lap Joint Flange (LJ Flange) is a two-piece flange assembly designed for piping systems that require frequent dismantling, inspection, and maintenance. It is used together with a stub end, allowing the flange to rotate freely around the pipe for easy bolt hole alignment. This design simplifies installation and makes Lap Joint Flanges an excellent choice for applications where regular maintenance or equipment replacement is required.
At Royal Steel India, we manufacture and supply premium-quality Lap Joint Flanges in a wide range of sizes, pressure classes, materials, and international standards. Our flanges are engineered to provide reliable performance, corrosion resistance, and long service life in various industrial applications.
A Lap Joint Flange is a backing flange that works in combination with a stub end. Unlike conventional flanges, it is not directly welded to the pipe. Instead, the stub end is welded to the pipe while the flange rotates freely behind it. This rotating feature makes bolt alignment quick and easy, especially in large-diameter piping systems or installations with limited working space.
Lap Joint Flanges are commonly used where piping systems need to be disassembled frequently for cleaning, inspection, or maintenance.
Key Features
- Used with a stub end for flexible installation
- Rotating flange allows easy bolt hole alignment
- Ideal for systems requiring frequent maintenance
- Quick installation and easy dismantling
- Suitable for corrosive service with expensive alloy stub ends
- Excellent corrosion resistance
- Available in various sizes and pressure ratings
- Durable construction with long service life
Available Grades
We manufacture Lap Joint Flanges in various materials, including:
Available Standards
- ASME B16.5
- ASME B16.47 Series A & B
- ANSI
- DIN
- EN
- BS
- JIS
- MSS SP-44
Pressure Ratings
- Class 150
- Class 300
- Class 600
- Class 900
- Class 1500
- Class 2500
- PN6 to PN400
Applications
- Oil & Gas Industry
- Petrochemical Plants
- Chemical Processing
- Water Treatment Plants
- Food & Beverage Industry
- Pharmaceutical Industry
- Marine Industry
- Pulp & Paper Industry
- Process Piping Systems
- Industrial Maintenance Applications
Why Choose Royal Steel India?
Royal Steel India is a trusted manufacturer, supplier, and exporter of high-quality Lap Joint Flanges. Our products are manufactured using premium-grade raw materials and advanced manufacturing processes to ensure precision, strength, and durability. Every flange is thoroughly inspected to meet international quality standards, providing dependable performance, competitive pricing, and on-time delivery for customers worldwide.
Frequently Asked Questions
What is a Lap Joint Flange used for?
A Lap Joint Flange is used in piping systems that require frequent dismantling, inspection, and maintenance. It provides easy bolt alignment and simplifies installation.
Does a Lap Joint Flange require a stub end?
Yes. A Lap Joint Flange is always used together with a stub end, which is welded to the pipe while the flange rotates freely around it.
What are the advantages of a Lap Joint Flange?
Lap Joint Flanges offer easy installation, flexible bolt alignment, simple maintenance, and reduced costs when using expensive corrosion-resistant materials.
What materials are available for Lap Joint Flanges?
Lap Joint Flanges are available in Stainless Steel, Carbon Steel, Alloy Steel, Duplex Steel, Nickel Alloys, Inconel, Monel, Hastelloy, Titanium, and other special alloys.
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