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. 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).
Lap Joint flanges have certain special advantages:
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.
1.ASME
ANSI B16.5,ASME B16.5,ASME B16.47,ASME B16.36,ASME B16.48,AWWA C-207,API 605,API590,MSS SP44,API6A
2.DIN
DIN2527,DIN2566,DIN2573,DIN2576,DIN2627,DIN2628,DIN2629,DIN2630,DIN2631,DIN2632,
DIN2633,DIN2634,DIN2635,DIN2636,DIN2637,DIN2638,DIN2641,DIN642,DIN2655,DIN2656,
DIN2673,DIN28030,DIN28031,DIN28032,DIN28036,DIN28038,DIN86029,DIN86030,DIN11864-2
3.EN
EN1092-1,EN1759-1
4.BS
B.S 3293,B.S 4504,B.S 10
5.ISO
ISO 7005-1
6.AS
AS2129,AS4087, AS, NZS 4331.1
7.JIS
JIS B2220,JIS B2238,JIS B2290,JIS G3443-2,JPI-7S-15,JPI-7S-43
8.UNI
UNI2253,UNI2254,UNI2276,UNI2277,UNI2278,UNI2280,UNI,2281~2286,UNI6091~6094
Size
1/8”~160”,DN10~DN4000
Pressure
PN1,PN2.5,PN6,PN10,PN16,PN25,PN40,PN64,PN100,PN160,PN250,PN320,PN400
CLASS75,CLASS150,CLASS300,CLASS400,CLASS600,CLASS900,CLASS1500,CLASS2500
2K,5K,10K,16K,20K,30K,40K
Specification
Plate Flange,Slip-On Welding Flange,Welding Neck Flange,Threaded Flange,Socket Welding Flange,Blind Flange,Long Welding Neck Flange,Lap Joint,Loose Plate Flange,Orifice Flange,Reducing Flange,Integral flange,Figure-8,Paddle Blank,Paddle Spacer,Specatcle Blind,Squre Flange,Reducing Flange, Orifice Flange
Material
1.Carbon Steel
A105,A350 LF1,A350 LF2,A350 LF3
2.Stainless Steel
ASTM SA-182/SA-182M F304,F304H,F304L,F316,F316H,F316L,F321,321H,F316Ti,317,F317H,F347,F904L,F310
3.Duplex Stainless Steel
F51,F53,F60
4. Hastelloy
Hastelloy B,Hastelloy B-2,Hastelloy B-3,Hastelloy C-4,Hastelloy C-22,,Hastelloy C-276,Hastelloy C-2000,Hastelloy G-35,Hastelloy G-30,Hastelloy N,Hastelloy S,Hastelloy X
5. Haynes
Haynes 188,Haynes 230,Haynes 556
6. Incoloy
Incoloy 020,Incoloy 800,Incoloy 800H,Incoloy 800HT,Incoloy 825,Incoloy 925,Incoloy A-286,
7. Inconel
Inconel 600,Inconel 601,Inconel 617,Inconel 625,Inconel 718,Inconel X750
8. Monel
Monel 400,Monel 401,Monel 404,Monel K-500
9. Nickel
Nickel 200,Nickel 201
