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Lap Joint Flange

Short Description:

Size: ½” (15 NB) to 48″ (1200NB) Type: Lap-joint Pressure ratings: 150#, 300#, 600#, 900#, 1500#, 2500# Materials:Stainless Steel: 304/304L, 316/316L, 304H, 316H, 309, 310S, 317L, 321/321H, 347/347H, 904L, DUPLEX 2205 / SUPER DUPLEX 2507 Standards: SANSI B16.15, ANSI B16.47, MSS SP-44, API6A, API 17D, Manufacturer Standard etc.

Product Description


Manufacturing Technique

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Lap joint flange also named loose flange or lapped flange, is a flange type that needs to match a lap joint stub end for connecting.
Their pressure-holding ability is little, if any, better than that of Slip-On flanges, and the fatigue life for the assembly is only one-tenth that of Welding Neck flanges. They may be used at all pressures and are available in a full-size range.


Lap Joint flanges have certain special advantages. Freedom to swivel around the pipe facilitates the lining up of opposing flange bolt holes.
We provides lap joint flange in stainless steel such 304, 304L, 316, 316L etc.

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  • Product: Lap Joint Flange
    Dimension Range: 1/2” to 48” (1200NB)
    Rates/SCH: 150#—2500#,API2000PSI-20000PSI
    Materials: ASTM A182 F304, F304L, F304/304L, F316, F316L, F316/FP316L, F317L, F321, F321H, F347, F347H, F51(Duplex Steel), N08904etc.
    Standards: ANSI B16.15, ANSI B16.47, MSS SP-44, API6A, API 17D, Manufacturer Standard etc.
    Our Strength
    • Fast Delivery
    • Various Materials
    • Full set of swivel ring flange, including gaskets and bolts
    • Customized fabrication available
    • Package supplying of piping materials
    • Overlay process
    • Third party inspection available

    Notes: ①The material above is for your reference only. The actual inquiry will consider order quantity and delivery time. ②If didn’t find your material here, you are kindly requested to make a specific enquiry to:


    photo51 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.

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