Umbhobho wentsimbi we-A252 GRADE 2 weepayipi zegesi ezingaphantsi komhlaba

Inkcazo emfutshane:

Xa kufikwa ekufakweni kwemibhobho yegesi engaphantsi komhlaba, enye yezona zinto zibalulekileyo kukukhetha indlela yokuwelda yokudibanisa imibhobho.Ukuwelda kwe-Arc efakwe kwi-Helical Submerged (HSAW) yindlela edumileyo yokuwelda esetyenziselwa ukudibanisa umbhobho wentsimbi we-A252 Grade 2 ekufakweni kwemibhobho yegesi engaphantsi komhlaba. Le ndlela inika iingenelo ezininzi, kubandakanya ukusebenza kakuhle kokuwelda, ukuqina kwesakhiwo okugqwesileyo, kunye nokuthembeka kwexesha elide.

Thumela i-imeyile kuthi

Iinkcukacha zeMveliso

Iithegi zeMveliso

Xa kufikwa ekufakweni kwemibhobho yegesi engaphantsi komhlaba, enye yezona zinto zibalulekileyo kukukhetha indlela yokuwelda yokudibanisa imibhobho.Ukuwelda kwe-Arc efakwe kwi-Helical Submerged(HSAW) yindlela edumileyo yokuwelda esetyenziselwa ukudibanisa umbhobho wentsimbi we-A252 Grade 2 ekufakweni kwemibhobho yegesi engaphantsi komhlaba. Le ndlela inika iingenelo ezininzi, kubandakanya ukusebenza kakuhle kokuwelda, ukuqina kwesakhiwo okugqwesileyo, kunye nokuthembeka kwexesha elide.

Umbhobho wentsimbi weBanga lesi-2 we-A252Yenzelwe ngokukodwa ukusetyenziswa kwiindlela zoxinzelelo ezifana nokuthutha igesi yendalo. Le mibhobho yaziwa ngamandla ayo aphezulu okutsalwa kunye nokumelana nokugqwala, nto leyo eyenza ukuba ibe yeyona ifanelekileyo ekufakweni kwemibhobho yegesi engaphantsi komhlaba. Nangona kunjalo, inkqubo yokudibanisa ibalulekile ekuqinisekiseni ukuthembeka kunye nobude bemibhobho yegesi yendalo.

Ipropati yoomatshini

	Ibanga loku-1	Ibanga lesi-2	Ibanga lesi-3
Incopho yeNzuzo okanye amandla eNzuzo, umzuzu, iMpa(PSI)	205(30 000)	240(35 000)	310(45 000)
Amandla okutsalwa, umzuzu, i-Mpa (PSI)	345(50 000)	415(60 000)	455(66 0000)

Uhlalutyo lweMveliso

Intsimbi mayingabi na-phosphorus engaphezulu kwe-0.050%.

Utshintsho Oluvumelekileyo Kubunzima Nobukhulu

Ubude ngabunye benqwaba yepayipi buya kulinganiswa ngokwahlukeneyo kwaye ubunzima bayo abuyi kwahluka ngaphezu kwe-15% ngaphezulu okanye i-5% phantsi kobunzima bayo obuqikelelwayo, kubalwe kusetyenziswa ubude bayo kunye nobunzima bayo ngobude beyunithi nganye.

Ububanzi bangaphandle abuyi kwahluka ngaphezu kwe-±1% ukusuka kububanzi obuqhelekileyo bangaphandle

Ubukhulu bodonga nangaliphi na ixesha abuyi kuba ngaphezulu kwe-12.5% phantsi kobukhulu bodonga obuchaziweyo.

Ubude

Ubude obungacwangciswanga obunye: 16 ukuya kwi-25ft (4.88 ukuya kwi-7.62m)

Ubude obuphindwe kabini obungacwangciswanga: ngaphezulu kwe-25ft ukuya kwi-35ft (7.62 ukuya kwi-10.67m)

Ubude obufanayo: umahluko ovumelekileyo ±1in

Enye yezona nzuzo ziphambili zokuwelda nge-spiral submerged arc kukusebenza kakuhle kwayo kwe-welding. Le ndlela ivumela amazinga aphezulu okufaka, okubangela ukuwelda ngokukhawuleza kunye nokwanda kwemveliso. Ngenxa yoko, ukufakwa kwe-imibhobho yegesi engaphantsi komhlabaingagqitywa ngexesha elifanelekileyo, inciphisa ukuphazamiseka kunye nexesha lokungasebenzi.

Ukongeza, i-HSAW inomgangatho ophezulu wolwakhiwo. Inkqubo yokudibanisa idala unxibelelwano oluqinileyo noluqhubekayo phakathi kwemibhobho yentsimbi ye-A252 Grade 2, ukuqinisekisa ukuba imibhobho inokumelana noxinzelelo lwangaphandle kunye neemeko zokusingqongileyo eziqhelekileyo kwiindawo ezingaphantsi komhlaba. Olu mgangatho wolwakhiwo lubalulekile ekuthuthweni ngokukhuselekileyo nangokuthembekileyo kwegesi yendalo kumgama omde.

Ukongeza ekusebenzeni kakuhle kunye nokuthembeka kwesakhiwo, ukuwelda kwe-arc engaphantsi komhlaba okujikelezileyo kunika ukuthembeka kwexesha elide. Iijoyinti eziwelding ezenziwe ngolu hlobo zibonelela ngokuqina okugqwesileyo kunye nokumelana nokugqwala, okuqinisekisa ukuba imibhobho yegesi engaphantsi komhlaba ihlala ikwimeko entle ixesha elide. Olu bude bexesha lubalulekile ekunciphiseni iindleko zokugcinwa kunye nokulungiswa ezinxulumene nemibhobho yegesi yendalo.

Lilonke, ukukhetha indlela yokuwelda yokudibanisa imibhobho yentsimbi ye-A252 Grade 2 kwiindawo zokufakelwa kwemibhobho yegesi engaphantsi komhlaba kudlala indima ebalulekileyo kukhuseleko olupheleleyo kunye nokusebenza kakuhle kwenkqubo yokusasazwa kwegesi. Ukuwelda kwe-arc engaphantsi komhlaba okujikelezileyo okujikelezayo kunika iingenelo ezibalulekileyo ekusebenzeni kakuhle kokuwelda, ukuthembeka kwesakhiwo kunye nokuthembeka kwexesha elide, okwenza kube yeyona ndlela ifanelekileyo yokuqinisekisa ukuthembeka kwemibhobho yegesi engaphantsi komhlaba.

Ngamafutshane, ukubaluleka kokuwelda kwe-arc yentsimbi ye-A252 Grade 2 spiral submerged arc kwi-underground gas pipeline facilities akunakuthathelwa ngqalelo. Le ndlela yokuwelda inika iingenelo ezininzi, kubandakanya ukusebenza kakuhle kokuwelda, ukuthembeka okugqwesileyo kwesakhiwo, kunye nokuthembeka kwexesha elide. Ngokukhetha i-HSAW welded A252 Grade 2 steel pipe, abafaki bemibhobho yegesi banokuqinisekisa ukuthuthwa kwegesi yendalo okukhuselekileyo nokuthembekileyo kwiminyaka ezayo.