ASTM B16.5 A403 304 Lap Joint/Loose Flange
A lap joint flange (Loose flange) consist two parts, the backing flange and the stud end, the stub end will be butt welded to the pipe , and the lap joint flange will be slip around the stub end. The lap joint flange is not connected to the pipe and stub end directly, so it could be rotated , it is convenient to install the flange connection if there is some misalignment between the bolt holes.
Standard: ANSI/ASME B16.5, ANSI/ASME B16.47, BS4504, BS3293, EN 1092, DIN2631,DIN2632,DIN2633, DIN 2634, DIN2635, DIN2636, DIN2637, DIN2638, JIS B2220, SABS / SANS 1123 , GOST / ГОСТ 12821-80 Flange, MSS SP-44 FLANGE, API 6A, 6B, 6BX weld neck FLANGE, ISO 7005 Weld neck flange. NFE 29203 Weld neck flange, KS B1503 , UNI 2280-67 ,UNI 2281-67 ,UNI 2282-67 ,UNI 2283-67 , UNI 2284-67, HG20595,AS2129.
Size: 1/2″– 160″.DN15 – DN4000 mm
Pressure: Class 75, Class125, Class 150, Class 300, Class 400, Class 600, Class 900, Class 1500,Class 2500, 3000 PSI, 5000 PSI, 10000 PSI, 20000 PSI.
PN2.5, PN6, PN10, PN16, PN25, PN40, PN64, PN100, PN160
5K, 10K, 15K, 20K, 30K.
Carbon steel: ASTM A105, A181, ASTM A516 GR.60, GR.70, ASTM A694 F42, F46, F52, F56, F60, F65, F70, ST37, ST45.8, C22.8, S235, S235JRG2, P235GH, P245GH, P250GH, P265GH, P355GH, S355J2, 16MN, 20MN, Q235, 20#, CT20, SS400.
Stainless steel: ASTM A182 F304, F304L, F316, F316L, F321, F321H, F304H, F316H, F347H, 1.4301, 1.4306, 1.4401, 1.4404, 1.4541, 1.4571, SUS304, SUS316.
Alloy Steel: ASTM A350 LF2, CL1/CL2, ASTM A182 F5, F9, F11, F12, F22, F91.
Duplex Steel: S31803 / F51 / S32205 / F60 / 1.4462
Super Duplex: S32750 / F53 / 1.4410 / S32760 / F55 / 1.4501
Sealing face: Raised Face(RF), Flat Face(FF), Ring Type Joint(RTJ).
Flange face finishing, MSS-SP-6, such as: Stock finishing, Spiral serrated finishing, concentric serrated finishing, smooth finishing etc.
Coating: Black paint, Yellow paint, Vanish oil
Certificate: BS EN10204 3.1 MTC, ABS, PED 97-23-EC, CE, ISO, API approved.
Application: Water Treatment, Shipbuilding industry, sea Platform, Petrochemical & Gas industry, Power plant, Valve industry, Construction, Chemical industry, General piping system etc.
Packing: Wooden case, Plywood case, Pallet.
Marking: MSS-SP-25, necessary information of flange specification, Customized marking is available.
The lap joint flange has a similar shape with slip on flange, and similar dimensions too . Because of the feature of lap joint flange,it is not widely used in high pressure conditions,but it is very suitable to used for the piping systems which are assembly and disassembly frequently. Hebei Haihao Flange Factory can produce all standards lap joint flanges,loose flanges.We have long time experience in the lap joint flange production.