Kuyiniisiphetho se-stubfuthi kungani kufanele isetshenziswe? Iziphetho ze-stub ziyizinto zokubopha ezingasetshenziswa (ngokuhlanganiswa ne-flange ye-lap joint) esikhundleni sokushisela ama-flange entanyeni ukuze kwenziwe ukuxhumana oku-flanged. Ukusetshenziswa kweziphetho ze-stub kunezinzuzo ezimbili: kunganciphisa izindleko eziphelele zamajoyinti a-flanged ezinhlelweni zamapayipi ezisezingeni eliphezulu (njengoba i-flange ye-lap joint kungadingeki ibe yinto efanayo yepayipi kanye ne-stub end kodwa ingaba yizinga eliphansi);kuyasheshisa inqubo yokufaka, njengoba i-lap joint flange ingajikeleziswa ukuze kube lula ukuvumelanisa imigodi yamabholithi. Iziphetho ze-stub zitholakala ngephethini elifushane nelide (iziphetho ze-ASA ne-MSS stub), ngobukhulu obufika kumasentimitha angu-80.
Izinhlobo Zokuphela Kwesigxobo
Iziphetho ze-stub zitholakala ngezinhlobo ezintathu ezahlukene, ezibizwa ngokuthi “Uhlobo A”, “Uhlobo B” kanye “Nohlobo C”:
- Uhlobo lokuqala (A) lwenziwa futhi lwenziwa ngomshini ukuze lufane ne-flange ejwayelekile yokuxhumanisa i-lap joint (imikhiqizo emibili kufanele isetshenziswe ndawonye). Izindawo zokuhlangana zinephrofayili efanayo ukuvumela umthwalo obushelelezi wobuso obukhanyayo.
- Iziphetho ze-stub zohlobo B kufanele zisetshenziswe nama-flange ajwayelekile okushelela
- Iziphetho ze-Type C stub zingasetshenziswa nge-lap joint noma ama-slip-on flanges futhi zenziwe ngamapayipi
ISIQEPHU ESIFUSHANE/ESIDE SEZIPHETHO (ASA/MSS)
Iziphetho ze-stub zitholakala ngamaphethini amabili ahlukene:
- iphethini elifushane, elibizwa ngokuthi iziphetho ze-MSS-A stub
- iphethini ende, ebizwa ngokuthi iziphetho ze-ASA-A (noma isiphelo se-ANSI length stub)
Isikhathi sokuthunyelwe: Mashi-23-2021
