Lap Joint Flanges are similar to other types of industrial flanges, but it does not have a raised face. Lap joint flanges are used in conjunction with a “Lap Joint Stub End”. The total initial cost of a lap joint flange along with a stub end is around one-third higher than that of comparable welding neck flanges. The pressure holding capacity of lap joint flanges is comparatively lower, and the fatigue life for the assembly is only one tenth that of welding neck flanges.
The lap joint flange with the stub end assembly is normally used in piping systems which require regular dismantling for inspection and cleaning. These flanges slip over the pipe, and are not welded or otherwise fastened to it. Bolting pressure is transmitted to the gasket by the pressure of the flange against the back of the pipe lap (Stub End).
Benefits of using lap joint flanges:
Freedom to swivel around the pipe facilitates the lining up of opposing flange bolt holes.
Lack of contact with the fluid in the pipe often permits the use of inexpensive carbon steel flanges with corrosion resistant pipe.
In systems which erode or corrode quickly, the flanges may be salvaged for re-use.
We offer lap joint flanges manufactured at our facility to companies in various industries including shipbuilding, power generation, petrochemical plants, oil refineries, waste water treatment plants, paper mills, pharmaceutical plants and turnkey projects among others.
Our products are widely exported to countries and regions such as the United States, Europe, Russia, Turkey, Malaysia, the UAE, Saudi Arabia, Iran, Brazil, Chile, Mexico, South Africa, Jordan, Tunisia, Vietnam, Indonesia, Thailand, Singapore, Colombia, and Sri Lanka.
Lap Joint Flanges, LJ Forged Flanges Production Range
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 Blind 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
Marking & Packing
Products are packaged to ensure that there is no damage during transit. In case of exports, standard export packaging is done in wooden cases. All flanges are marked with Grade, Lot No, Size, Degree and our trade mark. On special requests we can also, make custom marking on our products.
Quality Assurance
At METLINE, all fittings and flanges are subject to strict inspection at each stage of the production process, from starting material purchasing to product dispatch. They are visually examined for conformity to ASTM, ASME, MSS, DIN, EN, and JIS codes and standards. Upon request, official certified Inspection Agencies can be called in to witness the material reports, dimensions and quality conformity of products.
Test Certificates: Manufacturer Test Certificate as per EN 10204 / 3.1B, Raw Materials Certificate, 100% Radiography Test Report, Third Party Inspection Report
Key Products
Alloy Steel Pipe Fittings
Carbon Steel Pipe Fittings
Dish End | Dished Ends
Steel Fasteners
Ferrule Fittings|Compression Fittings
Fabricated/Flanged Pipes, Fittings
Investment Casting-IC Fittings
Plate Circles, Rings, Forgings
Stainless Steel Pipe Fittings, Pipes
SS Flexible Hose Pipes
Aluminium Fittings | Flanges
Sanitary|Dairy Fittings & Valves
Stainless Steel Pipes | Tubes
Stainless Steel Bars|Flats
Sanitary Tubes, Pipes and Fittings
Special Grades
2205 Duplex Fittings
Copper Nickel Pipe Fittings
904L Pipe Fittings
Monel Pipe Fittings | Pipes
Inconel Pipe Fittings
Alloy 20 Fittings
201/202 Pipe Fittings
304/304L Pipe Fittings
310S Pipe Fittings
316/316L Pipe Fittings
317L Pipe Fittings
321/321H Pipe Fittings
347/347H Pipe Fittings
Buttweld Fittings
Buttweld Fittings
Pipe Elbow
Pipe Tee
Pipe Cross
Pipe Reducer
Pipe End Cap
Pipe Bends
Stubend – Lap Joint
Forged Fittings
Forged Fittings
Pipe Nipples
Socket Weld Fittings
Threaded Pipe Fittings
Pipe Outlet Fittings
Swage Nipples | Pipe Swage
Flanges
Blind Flange
Flanges
Lap Joint Flange
Plate Flange
Slip On Flanges
Socket Weld Flange
Threaded Flanges
Weld Neck Flanges
FEATURED PRODUCTS
· SS 304L Pipe Fittings
· Long Radius / Short Radius Elbows
· Stainless Steel Bends
· Ferrule Fittings
· 904L Pipe Fittings
· Monel Pipe Fittings
· Inconel Pipe Fittings
