Transcription of Flange Types
1 Flange TypesA Flange is a method of connecting pipes, valves, pumps and other equipment to form apipework system. It also provides easy access for cleaning, inspection or are usually welded or screwed into such systems and then joined with bolts. This Flange is circumferentially welded into the systemat its neck which means that the integrity of the buttwelded area can be easily examined by bores of both pipe and Flange match, whichreduces turbulence and erosion inside the weld neck is therefore favoured in criticalapplications This Flange is slipped over the pipe and then filletwelded. Slip-on flanges are easy to use in fabricatedapplications. This Flange is used to blank off pipelines, valves andpumps, it can also be used as an inspection cover.
2 Itis sometimes referred to as a blanking Flange . This Flange is counter bored to accept the pipe beforebeing fillet welded. The bore of the pipe and Flange areboth the same therefore giving good flowcharacteristics. This Flange is referred to as either threaded orscrewed. It is used to connect other threadedcomponents in low pressure, non-critical welding is required. These flanges are always used with either a stub endor taft which is butt welded to the pipe with the flangeloose behind it. This means the stub end or taft alwaysmakes the face. The lap joint is favoured in lowpressure applications because it is easily assembledand aligned. To reduce cost these flanges can besupplied without a hub and/or in treated, coatedcarbon steel.
3 This is a method of ensuring leak proof flangeconnection at high pressures. A metal ring iscompressed into a hexagonal groove on the face ofthe Flange to make the seal. This jointing method canbe employed on Weld Neck, Slip-on and BlindFlanges.
