TheASMEB16.5standardisawidelyrecognizedspecificationforpipeflangesandflangedfittings.PublishedbytheAmericanSocietyofMechanicalEngineers(ASME),itcoverspressure-temperatureratings,materials,dimensions,tolerances,marking,andtestingforflanges.Thestandardappliestoflangesmadefromcastorforgedmaterials,aswellasblindflangesandcertaintypesofflangedfittings.ASMEB16.5includesflangeswithratingclassesfrom150to2500insizesrangingfromNPS1/2toNPS24.Itprovidesrequirementsforflangefacings,bolting,andgaskets,ensuringcompatibilityandsafetyinpipingsystems.Thestandardiscommonlyusedinindustriessuchasoilandgas,chemicalprocessing,powergeneration,andwatertreatment.Firstpublishedin1921,ASMEB16.5isregularlyupdatedtoreflecttechnologicaladvancementsandindustryneeds.ItisoftenreferencedinconjunctionwithotherASMEstandardslikeB31.3forprocesspiping.CompliancewithB16.5helpsensureproperflangeselection,installation,andperformanceinvariousserviceconditions.
