Lap Joint Flange

Lap Joint Flange

Flexible and Cost-Effective Solutions for Complex Piping Systems

Our Lap Joint Flanges are engineered for piping systems that require frequent dismantling, alignment flexibility, or the use of expensive alloy pipes. By utilizing a stub end welded to the pipe, the flange itself rotates freely, allowing for easy bolt hole alignment and reducing installation stress.

Key Features & Benefits

• Easy Alignment: The flange rotates freely around the stub end, making it effortless to align bolt holes during assembly, especially in tight spaces.

• Cost Savings on Materials: The flange does not contact the pipe fluid; therefore, you can use a lower-cost carbon steel flange with a high-grade alloy stub end, significantly reducing material costs.

• Facilitates Maintenance: Ideal for systems requiring frequent inspection, cleaning, or modification, as the flange can be easily removed without cutting the pipe.

• Reduces System Stress: The loose fit accommodates misalignment and thermal expansion, minimizing stress on the piping system.

• Compatible with Various Pipe Materials: Can be used with any pipe material that matches the stub end, offering versatility in mixed-material systems.

Technical Specifications

• Size Range: 1/2" to 24" (DN15 to DN600)

• Pressure Classes: Class 150, 300, 600, 900, 1500, 2500

• Standards Compliance: ASME B16.5, ASME B16.47 Series A & B, EN 1092-1, BS 4504, DIN 2576

• Facing Types: Raised Face (RF), Flat Face (FF), Ring Type Joint (RTJ)

Available Materials

We offer Lap Joint Flanges in a wide range of materials, designed to pair with matching stub ends for optimal performance:

• Carbon Steel: ASTM A105, A350 LF2, A694 F52/F60/F65/F70

• Stainless Steel: ASTM A182 F304/L, F316/L, F310, F321, F347, 904L

• Duplex & Super Duplex: F51 (2205), F53 (2507), F55

• Alloy Steel: ASTM A182 F11, F12, F22, F91

• Nickel Alloys: Inconel 600/625, Monel 400/K500, Hastelloy C276/C22

Applications

Our Lap Joint Flanges are commonly used in:

• Chemical and petrochemical processing plants

• Offshore and marine piping systems

• Power generation and steam lines

• Water treatment and distribution networks

• Systems requiring frequent maintenance or inspection

Quality Assurance & Packaging

Each Lap Joint Flange is manufactured to meet international standards, with strict quality control on dimensions, material composition, and mechanical properties. We provide full Material Test Reports (MTR) and third-party inspection certificates upon request.

All products are packed in seaworthy wooden cases or pallets, with anti-corrosion protection to ensure safe delivery to any destination worldwide.