Kwintsimi yemibhobho yokwenziwa kombhobho, imigangatho eyahlukeneyo kunye neenkcazo kufuneka zilandelwe ukuqinisekisa umgangatho kunye nokhuseleko lwemveliso yokugqibela.I-ASTM A139Ngumnye umgangatho owenza indima ebalulekileyo ekuvelisweni kwemibhobho yentsimbi yezicelo ezahlukeneyo.
I-ASTM A139 yeyona nto iphambili kwi-ElectroFusion (i-ARC) ye-WelDed Piper yentsimbi (i-NPS 4 nangaphezulu). Ibandakanya iimfuno ze-Spiral Seam ElectroFusion (i-ARC) ye-Weldied, udonga oluncinci, i-austetitic ping yentsimbi yezicelo zoncedo okanye zeqondo lokushisa eliphezulu. Lo mgangatho ucacisa iimfuno zezaxhobo, iinkqubo zokwenza imveliso, ubukhulu kunye neepropathi zoomatshini bemibhobho yentsimbi.
Iimfuneko zezinto ezibonakalayo ze-ASTM A139 Chaza iintlobo kunye namabakala ensimbi enokusetyenziselwa ukwenza imibhobho. Oku kubandakanya ukwakhiwa kweekhemikhali zentsimbi, ekufuneka ibe nepesenti ethile yezinto ezinjengekhabhoni, i-manganese, phosfurus, i-silfur kunye ne-silicon. Ezi mfuno zibalulekile ekuqinisekiseni ukuba intsimbi isetyenzisweimibhobhodibana namandla afanelekileyo kunye nemigangatho yokunganyangeki ye-suresion.
Inkqubo yokwenziwa kwe-ASTM ye-A139 ibandakanya i-ElectroFusion (i-ARC), esebenzisa i-Arc yombane ukuze ivelise ubushushu obufunekayo kwimigca ye-weld kwintsimbi yentsimbi. Le nkqubo ilawulwa ngononophelo ukuqinisekisa ukuba i-welds iphakathi kumgangatho ophezulu kwaye ingenasiphene. Owona mgangatho ucacisa iindlela zokuhlola ze-Welds, ezinje ngovavanyo lwe-Ultrasonic kwaye uvavanywe ngokungxama okungxamisekileyo, ukuqinisekisa ukuba bayahlangabezana nemigangatho esemgangathweni.
Ngokuphathelele kwimilinganiselo, i-ASTM A139 ichaza iimfuno zombhobho, ubukhulu be-Wall, kunye nobude. Oku kubandakanya ukudilizwa okukhethekileyo kwimilinganiselo yokuqinisekisa ukuba umbhobho uhlangabezana neenkcazo eziyimfuneko zokusetyenziswa kwenjongo yazo. Ezi mfuno zibalulekileyo zibalulekile ekuqinisekiseni ukuba imibhobho ifakiwe kwaye iqhagamshelwe ngokuchanekileyo kwizicelo ezahlukeneyo.
Iipropathi zoomatshini ezifana namandla e-phanger, ukuvelisa amandla, kunye ne-elongwation nayo ichazwe kwi-ASTM A139. Ezi ndawo zibalulekile ekuqinisekiseni amandla kunye nokusebenza kombhobho phantsi kweemeko ezahlukeneyo zokusebenza. Imigangatho yebeka iimfuno ezisezantsi kwezi propati zoomatshini ukuqinisekisa ukuba umbhobho unokumelana noxinzelelo olulindelekileyo, ubushushu kunye neemeko zokusingqongileyo.
Lilonke, i-ASTM A139 idlala indima ebalulekileyo ekwenzeniImibhobho yentsimbikwizicelo ezahlukeneyo. Ngokuchaza izinto, iinkqubo zokwenza imveliso, ubukhulu kunye neempawu zobuchwephesha zemibhobho, umgangatho uqinisekisa ukuba imveliso yokugqibela ifezekisa imigangatho efanelekileyo nezokhuseleko. Inika abavelisi, iinjineli kunye nabasebenzisi bokuphela zintembele ukuba imibhobho iyakwenza njengoko kulindelwe isicelo sayo.
Isishwankathelo, ukuqonda ukubaluleka kwe-ASTM A139 kwimveliso yombhobho kubalulekile ekuqinisekiseni umgangatho kunye nokhuseleko lweemveliso zentsimbi zentsimbi. Umgangatho ubeka iimfuno ezifanelekileyo zezixhobo, iinkqubo zokwenza imveliso, imilinganiselo kunye neepropathi zoomatshini ukuqinisekisa ukuba imigangatho ifezekisa imigangatho efanelekileyo kunye nenqanaba lokusebenza. Ngokunamathela kwi-ASTM A139, abavelisi banokuvelisa umbhobho wentsimbi esemgangathweni ohlangabezana neemfuno zomsebenzi ohlukeneyo wamashishini kunye nokusetyenziswa.
Ixesha leposi: NgoDE-28 ukuya ku-923