Introduction: Flange cover is also known as blind flange or blind plate. It is a flange without a hole in the middle, used to seal pipeline plugs. The function is the same as welding the head and threaded pipe cap, except that the blind flange and threaded pipe cap can be removed at any time, while welding the head cannot.
Production materials: Carbon Steel: ASTM A105,20 #, Q235, 16Mn, ASTM A350 LF1, LF2 CL1/CL2, LF3 CL1/CL2, ASTM A694 F42, F46, F48, F50, F52, F56, F60, F65, F70;
Stainless steel: ASTM A182 F304, 304L, F316, 316L, 1Cr18Ni9Ti, 0Cr18Ni9Ti, 321, 18-8;
Alloy Steel: ASTM A182 F1, F5a, F9, F11, F12, F22, F91, A182F12, A182F11, 16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8/III;
Production standards: HG/T20592-2009, HG/T20615-2009, GB/T9123.1-2000, GB/T9123.2-2000, GB/T9123.3-2000, GB/T9123.4-2000.
Detailed introduction: Flange cover (BL) sealing surface: flat (FF), raised face (RF), concave convex face (MFM), tenon groove face (TG), ring connection face (RJ) Production materials: carbon steel, stainless steel, alloy steel.
Specification: 1/2 ″~80 ″ (10-2000) Pressure rating: 0.6Mpa~32Mpa, 150Lb~2500Lb, PN0.25-PN42.0
Material: Various materials such as 20 #, 304, 304L, 321, 316, 316L, 310S, etc
Common standards:
National standard: GB/T9112-2000 (GB9113? 1-2000 to GB9123? 4-2000)
American standard: ANSI B16.5 Class150, 300, 600, 900, 1500 (WN, SO, BL, TH, LJ, SW)
Japanese standard: JIS 5K, 10K, 16K, 20K (PL, SO, BL, WN, TH, SW)
German standard: DIN2573, 2572, 2631, 2576, 2632, 2633, 2543, 2634, 2545 (PL, SO, WN, BL, TH)
Ministry of Chemical Industry standards: HG5010-52~HG5028-58, HGJ44-91~HGJ65-91, HG20592-97 series, HG20615-97 series
Mechanical department standards: JB81-59~JB86-59, JB/T79-94~JB/T86-94, JB/T74-1994
Pressure vessel standards: JB1157-82~JB1160-82, JB4700-2000~JB4707-2000
Application scope: Boiler and pressure vessel, petroleum, chemical, shipbuilding, pharmaceutical, metallurgy, machinery, food and other industries. Flange connection is an important connection method in pipeline construction.
Flange connection is the process of fixing two pipes, fittings, or equipment onto a flange plate. Between the two flanges, flange pads are added and bolted together to complete the connection. Some pipe fittings and equipment already come with their own flanges, which also belong to flange connections.
The flange is divided into threaded connection (threaded connection) flange and welded flange. Low pressure small diameter threaded flanges are used, while high pressure and low pressure large diameter welded flanges are used. The thickness of flange plates and the diameter and quantity of connecting bolts vary with different pressures.
According to different levels of pressure, flange gaskets also have different materials, from low-pressure asbestos gaskets, rubber gaskets, high-pressure asbestos gaskets to metal gaskets.
The flange connection is easy to use and can withstand large pressures.
In industrial pipelines, flange connections are widely used.