
Lap joint flange
China Lap Joint Flange Manufacturer Datang Offers Lap Joint Flange, LJ Flange used for Stub End Fittings, Available in ANSI, BS, JIS, UNI, MSS SP.
- Min.Order Quantity: 1 Piece
- Supply Ability: 2000 Tons / Month
- Port: Tianjin port
- Delivery Detail: 15-20 days
Lap Joint Flanges (LJ Flanges) are used on piping fitted with lapped pipe or with lap joint stub ends the combined initial cost of the two items being approximately one-third higher than that of comparable welding neck flanges. Their pressure-holding ability is little, if any, better than that of slip-on flanges and the fatigue life of the assembly is only one-tenth that of welding neck flanges. The lap joint flange with the stub end assembly are normally used in systems requiring frequent dismantling for inspection and cleaning and where the ability to swivel flanges and to align bolt holes materially eases the erection of large diameter or unusually stiff piping. These flanges are also used in applications where there is a need to facilitate bolt alignment. Their use at points where severe bending stress occurs should be avoided.
Lap Joint Flange Description
Type | flange |
Material | Alloy steel (ASTM A234 WP12/WP11/WP22/WP5/WP9/WP91)< /br> Stainless steel (ASTM A403 WP304/WP304L/WP316/WP316L)< /br> Carbon steel (ASTM A234WPS, A234WPC, A420 WPL6), St45.8 A105 A106 STG42) |
Standard | ANSI, B16.9, ASME, DIN2650, 2615, 2616, 2617, JIS B2311, 2312, 2313, EN 10253-11, EN10253-2 |
Type | LR 30, 45, 60, 90, 180 degree< /br> SR 30, 45, 60, 90, 180 degree< /br> 1.0D, 1.5D, 2.0D, 2.5D, 3D, 4D, 5D, 6D, 7D-40D |
Thickness | SCH5 , SCH10, SCH20, SCH30, SCH STD ,SCH40, SCH60, SCH XS ,SCH80, SCH100, SCH120, SCH140, SCH160, XXS |
Size | 1/2-80 inch (DN15-DN2000) |
Surface treatment | Anti-rust Oil, Transparent/Yellow/Black Anti-rust Paint,Zinc, |
Hot dipped Galvanized. | |
Inspection | Factory in-house self check or Third Party inspection |
Packing | Wooden case, pallet or as customers’ requirement |
Applications | Petroleum,chemical,power,gas,metallurgy, shipbuilding, construction, etc |
Heat Treatment | Normalizing, Annealing, Quenching+Tempering |
Payment | L/C T/T |




