Production materials for flange covers

Introduction:

Flange cover, also known as blind flange or blind plate. It is a flange without a hole in the middle, used for sealing 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 does not.

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 standard: HG/T20592-2009 HG/T20615-2009、GB/T9123.1-2000、GB/T9123.2-2000、GB/T9123.3-2000、GB/T9123.4-2000。

Detailed introduction:

Sealing surface of flange cover (BL): flat surface (FF), protruding surface (RF), concave convex surface (MFM), mortise and tenon surface (TG), ring connection surface (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: 20 #, 304, 304L, 321, 316, 316L, 310S and other materials Common standards: National standard: GB/T9112-2000 (GB9113-1-2000~GB9123? 4-2000) American standard: ANSI B16.5 Class 150, 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, 2632 1. 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 Application scope of JB4700-2000~JB4707-2000: Boiler and pressure vessel, petroleum, chemical, shipbuilding, pharmaceuticals, 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, adding flange pads between the two flanges, and fastening them together with bolts to complete the connection. Some pipe fittings and equipment already come with flanges, which also belong to flange connections.

Flanges are divided into threaded connection (threaded connection) flanges and welded flanges. Low pressure small diameter threaded flanges are used, while high pressure and low pressure large diameter flanges are welded. The thickness of flange plates and the diameter and quantity of connecting bolts vary for different pressures.

According to different levels of pressure, flange gaskets are made of different materials, ranging from low-pressure asbestos gaskets, rubber gaskets, high-pressure asbestos gaskets to metal gaskets.

The flange connection is easy to use and can withstand high pressure.

In industrial pipelines, flange connections are widely used.