Emkhakheni wobunjiniyela bamapayipi, ama-flange, njengezingxenye ezibalulekile zokuxhuma amapayipi, anezinhlobonhlobo zezinhlobo nemisebenzi. Phakathi kwazo, ama-butt welded flange asephenduke "imikhiqizo yenkanyezi" ezinhlelweni zamapayipi ezimboni ngenxa yokusebenza kwawo okuhle kakhulu kanye nezimo ezibanzi zohlelo lokusebenza.

I-Welding flange, eyaziwa nangokuthi i-high neck flange, iyingqayizivele ngokuthi intamo ephakeme ende futhi ethambekele isuka endaweni yokushisela phakathi kwe-flange nepayipi (njengoba kuboniswe kumdwebo wohlelo). Umklamo ohlakaniphile wale ntamo ephakeme awugcini nje ukukhulisa ukuqina namandla e-flange, kodwa futhi unciphisa ngokuphumelelayo ukuyeka ukucindezeleka, ukuqinisekisa ukuzinza nokuvala uphawu lwe-flange ezindaweni ezicindezelayo, ezishisa kakhulu, noma eziphansi. Idizayini yembobo engaphakathi inkulu kancane kunobubanzi obungaphandle bepayipi, okwenza kube lula ukushisela izinqe, kuyilapho umthungo we-weld oyisiyingi welula kokubili ngaphakathi nangaphandle kwe-flange, okwenza ngcono ukusebenza kokuvala.

Ngenxa yalezi zinzuzo zokuklama, ama-butt welded flange afaneleka ngokukhethekile kumasistimu wamapayipi anengcindezi ephezulu, izinga lokushisa eliphezulu, noma izinga lokushisa eliphansi emikhakheni yezimboni efana ne-petroleum, amakhemikhali, kanye nokwakhiwa kwemikhumbi. Ingakwazi ukumelana nokuguquguquka okukhulu kwengcindezi kanye nezinga lokushisa, iqinisekise ukusebenza okuzinzile kwepayipi. Phakathi naleso sikhathi, ama-butt welded flange nawo asetshenziswa ngokujwayelekile emigqeni yokuthutha imidiya evuthayo, eqhumayo, noma enobuthi, futhi ukusebenza kwawo okuthembekile kokuvala kunikeza iziqinisekiso eziqinile zokuthuthwa okuphephile kwabezindaba.

Ngokwamazinga okukhiqiza, amaflange ashiselwe izinqe kufanele ahambisane nezidingo eziqinile ezifana ne-JB4726-4728. Ngokuya ngokwezingcindezi nezisetshenziswa ezihlukene, amamaki okubumba asukela kuBanga I kuya kuBanga lesi-III ukuze kuqinisekiswe ukusebenza kwe-flange ezindaweni zokusebenza ezihlukene. Ngaphezu kwalokho, i-slope yangaphandle yentamo ye-flange ehlanganisiwe akufanele idlule i-70 °. Le mininingwane yokuklama isiza ukulawula ngokuqinile imingcele yezobuchwepheshe ngesikhathi sokukhiqiza nezinqubo zokushisela, isebenzisa ngokugcwele indima nenani le-flange.