(6) Socket welding flange (SW)
Socket welding flange
Socket Welding Flange
Socket welding flange
Socket welding flange
Sealing surface form: raised surface (RF), concave-convex surface (MFM), tongue and groove surface (TG), ring connection surface (RJ)
Material: 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;
Alloy Steel: ASTM A182 F1, F5a, F9, F11, F12, F22, F91, A182F12, A182F11, 16MnR, Cr5Mo, 12Cr1MoV, 15CrMo, 12Cr2Mo1, A335P22, St45.8/Ⅲ, 35CrMoV, 45CrMo, etc.
Manufacturing standards: ANSI B16.5, GB/T9117.1-2000—GB/T9117.4-200, etc.
(7) Threaded flange (TH)
Nominal diameter of threaded flange: DN8～DN100 Working pressure: 1.0～2.5 (MPa) Plate type threaded flange material: stainless steel, carbon steel, alloy steel.
Threaded flange use: suitable for thread locking and sealing of industrial and civil pipes such as fire fighting, gas, cold and hot water, air conditioning, air pressure pipes, oil pipes, instruments, hydraulic pipes, etc.
Flange cover (BL)
Flange cover, also called blind flange, is a flange without a hole in the middle, which is used to seal pipeline plugs. There are many types of sealing surfaces, including flat, convex, concave-convex, tongue-and-groove surfaces, and ring connection surfaces.
Sealing surface: flat surface (FF), raised surface (RF), concave-convex surface (MFM), tongue and groove surface (TG), ring connection surface (RJ)
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.
(8) Loose flange
Loose flange with neck butt welding ring
Loose flange, butt welding ring, loose flange with neck flange, butt welding ring, loose plate flange, flat welding ring, loose plate flange, plate type, over loose flange. In addition, in order to meet the needs of locking after the device, there is a rod part. These holes can prevent the bolts from loosening when they are subjected to vibration. Some flange bolts without threaded polished rods are made thinner, called thin rod flange bolts. This kind of flange bolts is conducive to the connection of variable forces. Steel There are special high-strength bolts in the structure. The head will be larger. The size will also change. Hot-dip galvanized round steel makes the molten metal react with the iron matrix to produce an alloy layer.
Flat welding ring loose flange (PJ/SE)
The flat welding ring loose flange is a movable flange piece, which is generally matched with the water supply and drainage fittings (the most common on the expansion joint). When the factory leaves the factory, there is a flange on each end of the expansion joint, which is directly connected to the project. The pipelines and equipment are connected by bolts. The purpose of using flat welding ring loose flanges is generally to save materials. Its structure is divided into two parts. One end of the pipe is connected to the pipe, the other is made of flanging, and the flange part is sleeved on the flanging. The flange is made of low-grade materials, while the pipe part uses the same material as the pipe to save material.
Loose flange with flat welding ring:
1. Cost saving. When the pipe material is special and expensive, the cost of welding the flange of the same material is high.
2. It is inconvenient for welding or processing or requires high strength. Such as plastic pipes, glass steel pipes and the like.
3. Easy to construct. For example, it is not easy to align the flange bolt holes during connection, or prevent the flange bolt holes of the equipment from being changed in the future.
Disadvantages of flat welding ring loose flange:
1. Low pressure.
2. Low strength at the welding ring (especially when the thickness is below 3mm)
Production standard of flat welded ring loose flange:
National standard: GB/T9112-2000 (GB9113·1-2000～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
Flange standard: HG20592-2009 (PN series)\HG20615-2009 (Calss series)
Ministry of Machinery Standards: JB81-59～JB86-59, JB/T74-1994, JB/T79-94～JB/T86-94
Pressure vessel standards: NB/T47020-2012～NB/T47027-2012, JB1157-82～JB1160-82 B16.47A/B B16.39 B16.48
Ring groove face flange and flange cover
Large diameter flat flange
Large diameter high neck flange
Horoscope
Butt welding ring loose flange 6
Rotating flange
Anchor flange
Surfacing/Overlaying Flange
Standard number of marine lap welded steel flanges: This standard applies to marine products and marine engineering products. The main materials are: carbon steel, alloy steel, low temperature steel, stainless steel.
Forged flange connection is to connect two pipes, fittings or equipment, and forged flange connection is an important connection method for pipeline construction. Forged flange connection is easy to use and can withstand greater pressure. In industrial pipelines, forged flange connections are widely used. In the family, the pipe diameter is small, and it is low pressure, and the connection of the flange stamping elbow is invisible. If it is in a boiler room or production site, flanged pipes and equipment are everywhere. The chromium content is 0.1%～0.5% (forged flanges generally do not contain chromium), the carbon content is below 1.0% and the forged flanges are manufactured by high-temperature forging, although some forged flanges have surface hardness (HRC) It can reach more than 56 (the hardening layer is only about 15mm). Because the hardenability of the forged flange material is poor, the hardness of the core is generally only more than 30 degrees. Under normal circumstances, the forged flange is often water quenched.
Flange protection cover (flange protection joint)
Flange protection cover
Flange protection cover is mainly used for anti-corrosion of flange connection in all industries. The flange protection head of this product is used to protect the flange surface (raised surface or ring joint). Double-ended studs and gaskets are protected from corrosion. This product is suitable for 316 ss stainless steel and non-metal (plastic), and its manufacturing size ranges from ½” to 144” ANSI, API and AWWA flange connection diameters. The combination of flange head system and flange packing can protect in harsh application environments.
