The related types of flanges
Flat welding ring of flange loose flange can be activities and are generally form a complete set on the water supply and drainage fittings (most common) on the slip joint, factory factory will each have a piece of flange on both ends of the expansion joints, directly with the engineering of piping, equipment, bolting. The purpose of using a flat ring loose flange is usually in order to save material, its structure is divided into two parts, pipe parts a head and pipe joint, a head of flanging, the edge of flange part set in turn. The flange USES low grade material, and the pipe part USES the same material as the pipe to achieve the purpose of saving the material. Flat welding ring loose flange: 1, cost savings. When the material is special and the price is expensive, the flange cost of welding the same material is high. Not easy to weld or not easy to process or need. Like plastic pipes, glass pipes and so on. Easy construction. It is not easy to find the flange bolt hole for the connection and prevent the change of the flange bolt hole.
The forging flange connection is to put two pipes, pipe pieces or equipment, and the forging flange connection is the important connection way of pipe construction. The use of forging flange connection is convenient, can bear the heavy pressure. In the industrial pipeline, the use of forged flange connections is extensive. In the home, the pipe is small and low in diameter, and cannot see the connection of the flanged flanged bend. If you are in a boiler room or a production site, there is a lot of flanged piping and equipment. Chromium content of 0.1% ~ 0.5% (forging flange in general do not contain chromium), carbon content below 1.0% and the forging flanges manufactured high temperature forging, although some forging flange surface hardness (HRC) can reach more than 56 or only around 15 ㎜) (hardening layer, because of its poor forging flange material hardenability the core hardness is generally more than 30 degrees, under normal circumstances the forging flange often adopts the water quenching treatment. Flange protector Flanged cover is used for all industrial flanges to be embalmed. The flange protection of the product is used to protect flange face (convex or ring). Double-ended studs and gaskets are protected from corrosion. The product is suitable for 316 ss stainless steel and non-metal (plastic), its manufacturing dimension is from the half "to 144" ANSI, the API and AWWA flange connecting the diameter. Flange sealing head system and flange packing can be protected in bad application environment.
According to the chemical industry norm: integral flange (IF), threaded flange (Th), plate flat welding flange diameter (PL), with butt welding flange (WN), with flat welding neck flange, socket welding flange (SO) (SW), the butt welding ring loose flange (PJ/SE), flat welding ring loose flange (PJ/RJ), lining flange cover (BL (S)), flange cover (BL). 2, according to the petrochemical industry standard score: threaded flange (PT), flange (WN), flat welding flange butt welding, socket welding flange (SO) (SW), loose flange (LJ), flange cover (not table). 3, according to the mechanical industry norm: integral flange, butt welding flange, plate flat welding flange, butt welding plate loose flange rings, flat welding ring plate loose flange, flange ring plate loose flange, flange cover. 4, according to the national norm: integral flange, threaded flange, butt welding flange, with flat welding neck flange, socket welding neck flange, butt welding band neck loose flange, plate, flat welding flange, butt welding plate loose flange rings, flat welding ring plate loose flange, flange ring plate loose flange, flange cover.
Test the nut with astm-b1117 salt spray test. Bolt assembly for 2000 hours, and the area protected by E2000/2400 can still be carried by hand. Correct use of E2000/2400 to help protect flange connection from corrosion. High temperature flange parts often need to be flat heat seal, if there is no additional sealing pressure sealant in a separate area, affected by the pressure, will cause manufacturing inaccuracy or deformation, that is to say, in a separate area will appear leakage under pressure, pressure and unplanned repair. Applications in the field of high temperature plane sealing is good brocade high-temperature sealant, its special formula in the high temperature steam and gas turbine and the flange standard applications keep inert, so it can bear the hot air, steam, water, light fuel oil and lubricant, can be resistant to oil and gas. It is a kind of one-component, paste sealants, industrial use, sealing compounds with high quality, suitable for smooth, level off sealing surface (butt joint) the condition of high temperature and pressure requirement. Apply to dry surfaces using a mortar knife or rubber spatula. Due to sealing products won't cure, but its consistency will slightly change, maintain flexibility and elasticity, so no time requirements, the use finished, can immediately into the running, do not need to wait. If it is necessary to repair the surface of high temperature seal with scratch damage, it should be used with the bokosi high temperature F series repair product.
