Rishabh Industries is an ANSI / ASME B16.5 Lap Joint Flange Manufacturer in Ahmedabad.
We are based in Ahmedabad, Gujarat, India.
Rishabh Industries is a renowned and ISO-certified manufacturer, exporter, and supplier of high-quality industrial flanges, specializing in ANSI / ASME B16.5 Lap Joint Flanges.
Rishabh Industries has earned a strong reputation for precision manufacturing, timely delivery, and customer satisfaction across global markets.
We serves a wide range of sectors, including oil & gas, petrochemicals, power generation, pharmaceuticals, and shipbuilding.
The company uses advanced CNC machining and rigorous quality control to deliver flanges that meet international standards.
What is a Lap Joint Flange?
A Lap Joint Flange (LJF) is a two-piece flange system commonly used in piping systems that require frequent disassembly for inspection or cleaning.
The ANSI / ASME B16.5 specification defines the dimensions and tolerance standards for Lap Joint Flanges from sizes ½” to 24″.
Features of ANSI / ASME B16.5 Lap Joint Flanges
- Designed for use with a Stub End to reduce material cost in high-grade piping systems
- Easy alignment during installation due to the freely rotating backing flange
- Ideal for low-pressure and non-critical service applications
- Available in carbon steel, stainless steel, alloy steel, and special materials
- Compatible with Class 150 to 2500 pressure ratings
- Manufactured in raised face (RF) and flat face (FF) variants
Benefits of Lap Joint Flanges
- Cost-Efficiency: Use of expensive materials only on stub ends reduces overall cost
- Reusability: Backing flanges can be reused multiple times
- Ease of Maintenance: Simple to dismantle for cleaning or inspection
- Alignment Flexibility: Ideal for systems with frequent changes or realignments
- Reduced Stress on Welds: No direct weld on the flange face helps avoid warping
Technical Specifications:
Size: 1/2″ (15 NB) to 48″ (1200NB)
Standards: ANSI B16.5, ANSI B16.47 Series A & B, MSS SP44, ASA, API-605, AWWA, Custom Drawings
Pressure Ratings: Class 150, Class 300, Class 400, Class 600, Class 900, Class1500, Class 2500 | PN6, PN10, PN16, PN25, PN40, PN64 etc.
Carbon Steel Lap Joint Flanges: ASTM A105/A105N, A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, A694 F42, F46, F48, F50, F52, F56, F60, F65, F70, A516.60, 65, 70 (Spectacle Lapped Joint Flange, Spacer Ring/Spade Flange), Steel RST37.2, C22.8
Stainless Steel Lap Joint Flanges: ASTM A182 F202, F304/304L/304H, F316/316L, F316H, F316TI, F310, F321, F904L
Alloy Steel Lap Joint Flanges: ASTM A182 F1, F5, F9, F11, F22, F91
Special Alloy Lap Joint Flanges: Duplex, Super Duplex, Nickel Alloys Flange Face Type: Flate Face (FF), Raised Face (RF), Ring Type Joint (RTJ)
Coating/Surface Treatment: Anti-rust Paint, Oil Black Paint, Yellow Transparent, Zinc Plated, Cold and Hot Dip Galvanized
Value Added Services: CNC Machining, Customised Flanges
Diameter: 1/2″ to 24″
Industries That Use Lap Joint Flanges
Lap Joint Flanges are widely used in industries where ease of assembly and cost-saving on high-grade materials are important. Common industries include:
- Oil & Gas – for offshore and onshore piping systems
- Petrochemicals & Refineries – where corrosion resistance is key
- Power Plants – including nuclear, thermal, and hydro
- Shipbuilding & Marine – ideal for pipelines requiring frequent maintenance
- Pharmaceutical & Food Processing – for hygienic disassembly
- Water Treatment & Desalination Plants
Frequently Asked Questions (FAQs)
Q1: What materials are available for Rishabh Industries’ Lap Joint Flanges?
A: We manufacture Lap Joint Flanges in carbon steel (A105), stainless steel (304/316), alloy steel (F11, F22), duplex, and other custom materials.
Q2: What are the pressure classes available?
A: Lap Joint Flanges are available in Class 150, 300, 600, 900, 1500, and 2500 as per ASME B16.5.
Q3: Are your flanges export-ready with certifications?
A: Absolutely. We provide complete documentation, including MTCs (EN 10204 3.1), NACE compliance, hydro test reports, and third-party inspection if needed.
Q4: Can Lap Joint Flanges be used in high-pressure systems?
A: While generally used in low-pressure systems, they can be used in high-pressure setups with appropriate design and material selection.
Rishabh Industries is an ANSI / ASME B16.5 Lap Joint Flange Manufacturer in Ahmedabad.
and also Supplier of Lap Joint Flange across India.
For detailed information and inquiries, please feel free to contact us.
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