A flanged is known to be as the ring type accessory that is made from the steel and is specifically designed to join different mechanical sections of pipes with the help of a pressure vessel or any other piece of equipment. In general flanges are sealed together with the help of a gasket, through which an easy access can be provided to the piping system, in case of its effective cleaning, modification as well as inspection.
The basic of steel flanges is provided herewith:
Some of the basic types of flanges are noted as, slip on flanges, blind flanges, lap-joint flanges, stainless steel weld-neck flanges, stainless steel Lap joint flanges and stainless-steel threaded flanges. Elaborate description of each type of flange can be noted as follows:
Slip on flanges
This type of flange is slipped over the piping system and is allowed to be settled by joining both top and the bottom side of the flange. This type of connection is generally used to provide sufficient strength to the connection and prevent further leakage. These types of flanges are advantageous over weld-neck flanges, as it demands for the lesser degree of accuracy, and lesser extent of efforts to cut the piping system. Overall, lower investment is required to install the type of flange.
These types of flanges are generally without any bore, and hence are also commonly identified to be as a blanking flange. The common applications of blind flanges are fixing up or sealing the end of the piping system opening. Analysis or inspection of piping system is easy as compared to other accessories of flanges. A blind flange can also be supplied along with or without hub depending upon the requirements of the piping system.
Stainless Steel lap joint flanges
These flanges are similar to that of slip-on types, with the only alterations of threaded bore and hence, fixing can be done without welding the joint. However, due to threaded bore application of these types of flanges are limited to low pressure system. If in case, the welding is necessary then it can also be done around the joint after assembly is ready; however, the method has not been proven to be as effective as the other counterparts.
Stainless steel weld neck flanges
As the name suggests, a type of a flange is generally fixed with the piping system through an additional attachment, identified to be as the welding neck of the flange. The attachment is quite expensive as compared to its other counterpart, may be due to its longer neck; but the accessory is found to be highly convenient and more suitable for high stress related applications, because the neck offers one of the important reinforcements to the flanges. The bore of the type of flange can help in reduction of turbulence and erosion due to liquid system.
Other than some of the specific types of flanges, mentioned herewith; some other relatively less used flanges are also available, such as groove flanges, long neck flanges, orifice flanges etc.