High-Quality Lap Joint Flanges Manufacturer & Supplier in India
Lap Joint Flanges are a type of pipe flange that is typically used in conjunction with a stub end fitting. This design allows the flange to rotate freely around the pipe, making it ideal for applications where frequent disassembly, alignment, or maintenance is required. The loose connection minimizes bolt hole alignment issues and reduces installation time.
At Vardhman Steel Overseas, we offer precision-engineered Lap Joint Flanges manufactured to ASTM, ASME, DIN, and EN standards, ensuring compatibility with global piping systems. These flanges are commonly made from materials such as Stainless Steel, Carbon Steel, Alloy Steel, Duplex, and Super Duplex, and are available in sizes ranging from ½" to 48” with pressure ratings of 150# to 2500#.
One of the key advantages of a Lap Joint Flange is that it allows for easy alignment in large diameter or high-pressure pipelines, especially when dealing with non-weldable or costly materials. It is widely used in chemical processing, petrochemical, water treatment, oil & gas, and other critical industrial systems.
Choose Vardhman Steel Overseas for high-quality, corrosion-resistant Lap Joint Flanges that offer flexibility, cost-efficiency, and dependable sealing performance across various demanding applications.
Available Materials & Grades
We offer a wide range of high-quality materials and grades to meet diverse industrial requirements and standards.
| Material | Specifications / Grades |
|---|---|
| Stainless Steel | ASTM A182, A240 – F304, 304L, 304H, 316, 316L, 316Ti, 310, 310S, 321, 321H, 317, 347, 347H, 904L |
| Duplex & Super Duplex Steel | ASTM/ASME A/SA182 – F44, F45, F51, F53, F55, F60, F61 |
| Carbon Steel | ASTM/ASME A/SA105, A350, A181 LF2, A516 Gr.70, A36, A694 – F42, F46, F52, F60, F65, F70 |
| Low Temperature Carbon Steel | ASTM A350 – LF2, LF3 |
| Alloy Steel | ASTM/ASME A/SA182 & A387 – F1, F5, F9, F11, F12, F22, F91 |
| Copper Alloy Steel | ASTM SB61, SB62, SB151, SB152 – UNS C70600 (Cu-Ni 90/10), C71500 (Cu-Ni 70/30), C10100, C10200, C10300, C10800, C12000, C12200 |
| Nickel Alloy | ASTM SB564, SB160, SB472, SB162 – Nickel 200 (N02200), Nickel 201 (N02201), Monel 400 (N04400), Monel K500 (N05500), Inconel 600 (N06600), 601 (N06601), 625 (N06625), 800 (N08800), 825 (N08825), Hastelloy C276 (N10276), Alloy 20 (N08020) |
Lap Joint Flange – Technical Specifications
Explore the dimensional and performance specifications of our high-quality Lap Joint Flanges manufactured by Vardhman Steel Overseas.
| Specification Parameter | Details |
|---|---|
| Product Name | Lap Joint Flange (LJF) |
| Size Range | ½” NB to 48” NB |
| Pressure Ratings | Class 150, 300, 600, 900, 1500, 2500, DIN ND-6, 10, 16, 25, 40 |
| Facing Types | Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ) |
| End Connection | Stub End Weld + Loose Flange |
| Manufacturing Method | Forged / Machined |
| Applicable Standards | ANSI B16.5, ANSI B16.47 Series A & B, MSS SP-44, AWWA, ASA, API-605, EN 1092-1, DIN2527 to DIN2673, BS4504, BS1560, BS10 |
| Testing & Certification | Hydro Testing, PMI, UT, RT, MTC as per EN 10204 3.1 / 3.2, Third-Party Inspection (TPI) |
Features & Benefits
Lap Joint Flanges from Vardhman Steel Overseas are designed for systems requiring frequent dismantling or inspection. These flanges are highly suitable for low-pressure applications and provide cost-effective, corrosion-resistant jointing solutions.
- Easy Alignment & Assembly – Rotatable design simplifies bolt alignment and allows for quick installation.
- Cost-Effective – Stub end made from corrosion-resistant material; backing flange from carbon steel reduces cost.
- Ideal for Non-Critical Applications – Perfect for low-pressure piping systems or where frequent disassembly is required.
- Minimal Welding Required – Welding is limited to the stub end, avoiding thermal impact on the flange.
- Reusability – Flanges can be reused with new stub ends, making them economical for maintenance-heavy systems.
- Supports Misalignment Tolerance – Compensates for slight misalignments in pipe fittings.
- Multiple Facing Options – Available in Flat Face (FF), Raised Face (RF), and RTJ types.
- Material Versatility – Stub ends available in stainless steel, duplex, nickel alloys; flanges in carbon steel.
- Conforms to Global Standards – Manufactured as per ASME, ANSI, EN, DIN, BS specifications.
- Widely Used Across Industries – Used in food, pharma, marine, oil & gas, and petrochemical sectors.