Lap Joint flange, is using Collar or steel ring connected the Flange to the pipe end. On the tube end, Flange can move.The steel ring or Collar acts as the sealing surface, the effect of Flange is compaction them.
The Lap Joint Flange is the kind flange which can be moved. It often being used in the water supply and drainage fittings (the most commonly is used on the slip joint).When the goods out of factory,on both ends of the slip joint has a piece of Flange.When the goods out of factory,on both ends of the slip joint has a piece of Flange, can connect directly with the engineering pipeline and the bolt of equipment.
That is the kind of belt loop Flange. Commonly used in pipeline, in that case, bolts can loose the pipeline on both sides, then tighten. Can dismounting the pipeline conveniently. Loose flange also called lap joint flange.
Loose flange
Flange press and pipe connection mode can be divided into five basic types: flat welding flange, threaded flange, flange, butt welding, socket welding flange, flange. There are different kinds of flange sealing surface type is generally used with DCS (RF), concave (FM), convex (M) and groove (T), groove surface (G), the plane (FF), RTJ (RJ).
Loose flange (loose flange) actually equivalent to the combination of two kinds of flange, as shown in figure:
Commonly used as a connection is a material change.
Loose flange
National standard: GB/T9112-2000 (GB9113, 1-2000 - GB9113, 4-2000)
Marine standards: GB/T10747-89
: American standard ANSI B16.5 Class150, 300, 600, 900, 600 (WN, SO, BL, TH, LJ, SW)
Japanese standard JIS a 5 k, 10 k, 16 k, 20 k (PL, SO, BL, WN, TH, SW)
German standard: DIN2573, 2572, 2631, 2576, 2632, 2633, 2543, 2634, 2545 (PL, SO, WN, BL, TH)
Chemical standards: HG5010-52 ~ HG5028-58, ~ HGJ65 HGJ44-91-91, HG20592-09 series, the series of HG20615-09
Prize of standards: ~ JB86 JB81-94-94, JB/T79-94 ~ JB/T86-94, JB/T74-1994
Pressure vessel standards: JB1157-82, JB4700 ~ JB1160-82-82 A/B ~ JB4707-2000 B16.47 B16.39 B16.48
With the neck flange
Carbon Steel (Carbon Steel) : ASTM A105, 10 #, 20 # 16 mn, ASTM, Q235, Q345B and A350 LF1, LF2 CL1 / CL2, LF3 CL1 / CL2, ASTM A694 F42, F46, F48, F50, F52, F56, the F60, F65, F70;
Stainless Steel (Stainless Steel) : ASTM A182 F304, 304 l, F316, 316 l, 1 cr18ni9ti, 0 cr18ni9ti, 321, 18-8;
Alloy Steel, Alloy Steel) : ASTM, F5a A182 F1, F9, F11, F12, making, F91, A182F12, A182F11, 16 MNR, Cr5Mo, 12 cr1mov, 15 crmo, 12 cr2mo1, A335P22, St45.8 / Ⅲ;
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Loose Flanges Images
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