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Lap joint flanges are extremely similar to slip-on flanges, with the primary difference being that the bore and face have a curved radius to accommodate a lap joint stub-end. Lap joint flanges and stub-end assemblies are commonly employed in circumstances where regular disassembly for inspection is necessary. Sanjay Metal India is a leading Slip-on and Lap Joint Flanges Manufacturer and Supplier in India.
A slip-on flange is simply a ring that is fitted over the pipe end, with the flange face extending far enough from the end of the pipe to allow for a weld bead to be applied on the inside diameter. On the rear side of the flange, the OD of the slip-on flange is likewise welded. Slip-on flanges are less expensive to manufacture than weld neck flanges and are easier to align. If Type B or Type C stub ends are utilized, slip-on flanges can also be utilized as lap joint flanges.
The slip-on flange can be fitted to the end of a pipe or to one or more pipe fitting ends. The slip-on flange is installed in such a way that the inserted end of the pipe or fitting is set back or short of the flange face by the thickness of the pipe wall + 1/8 of an inch. This enables for a fillet weld equivalent to the thickness of the pipe wall within the SO flange without causing any damage to the flange face. A fillet weld is also used to join the rear or outside of the flange. A Slip-On flange variant is also available. The Slip-On Reducing Flange is what you’re looking at. This is essentially a bigger (say, 14″) Slip-On flange blank with the Center (pipe) hole cut out (or drilled out) for a 6″ (or other sizes) pipe instead of a 14″ pipe.
A lap joint flange is a two-piece device that resembles both a weld-neck flange and a loose slip-on flange. One item is a sleeve called a “Stub-end,” which is fashioned like a small section of pipe with a weld bevel on one end and a narrow shoulder called the hub on the other end. The hub has the same outer diameter as a weld neck flange’s raised face (gasket contact surface). The thickness of the hub is typically between ¼” and 3/8″. A rounded transition (or inner fillet) connects the hub to the sleeve on the back face of the hub. The backing flange is the other component of a Lap Joint Flange. This flange has all of the same common measurements as any other flange (O.D., bolt circle, bolt hole size, etc.), but it does not have a raised face. On one side, the rear, there is a little shoulder with a square cut in the center or pipe hole.
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|ASTM A182 F309H Stainless Steel Flanges||ASTM A182 F310 Stainless Steel Flanges|
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|ASTM A182 F316H Stainless Steel Flanges||ASTM A182 F316L Stainless Steel Flanges|
|ASTM A182 F316N Stainless Steel Flanges||ASTM A182 F316LN Stainless Steel Flanges|
|ASTM A182 F316TI Stainless Steel Flanges||ASTM A182 F310H Stainless Steel Flanges|
|ASTM A182 F317 Stainless Steel Flanges||ASTM A182 F317L Stainless Steel Flanges|
|ASTM A182 F321 Stainless Steel Flanges||ASTM A182 F321H Stainless Steel Flanges|
|ASTM A182 F347 Stainless Steel Flanges||ASTM A182 F347H Stainless Steel Flanges|
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