Kwiiprojekthi zesiseko seenqwaba kunye nokwakhiwa kwesiseko esinzulu, ukukhethwa kobukhulu beenqwaba zemibhobho yentsimbi kuchaphazela ngokuthe ngqo amandla okuthwala kunye nokhuseleko lobunjineli. Ubungakanani beMibhobho ye-ASTM A252 (umgangatho we-ASTM A252 weenqwaba zemibhobho yentsimbi) bubonelela iinjineli ngezikhokelo ezicacileyo zeenkcukacha, ukuqinisekisa ukuba ukhetho lusekelwe kubungqina obuqinileyo kwaye umgangatho unokulawulwa. Eli nqaku liza kukunceda uqonde uluhlu lweenkcukacha ezisemgangathweni kwaye uhlole indlela yokulawula umgangatho wemveliso ukusuka kumthombo.
Imigaqo emiselweyo yeIipayipu zentsimbi ze-ASTM A252
Umgangatho we-ASTM A252 ugubungela iipali zemibhobho yentsimbi yekhabhoni esetyenziswa kwiiprojekthi zesiseko seepali, ezahlulwe zibe ziintlobo ezimbini: iipali zentsimbi ezingenamthungo kunye nolwakhiwo oludibeneyo. Uluhlu lweenkcazo ezisemgangathweni ludla ngokuquka:
Ububanzi obuqhelekileyo: buqala kwii-intshi ezi-6 (168.3mm) ukuya kwii-intshi ezingama-60 (1524mm), bugubungela iimfuno zeziseko ezincinci neziphakathi kunye nezinkulu zeenqwaba.
Uthotho lobukhulu bodonga: Inika iinkcukacha ezahlukeneyo kubandakanya ubukhulu bodonga obuqhelekileyo (STD), udonga olunobukhulu obungaphezulu (XS), kunye nodonga olunobukhulu obuphindwe kabini (XXS)
Ukulungelelanisa ubude: Ubude obuqhelekileyo obunye buqala kwiimitha ezi-6 ukuya kwezili-12. Ubude obulungiselelwe wena bungabonelelwa ngokweemfuno zobunjineli.
Uyilo olusemgangathweni lwaleUbungakanani bepayipi ye-Astm A252ivumela iinjineli ukuba zikhethe ngokuchanekileyo uhlobo olufanelekileyo ngokusekelwe kwiimeko zejoloji kunye neemfuno zomthwalo, ngelixa ziphucula iindleko zezinto ezibonakalayo ngelixa ziqinisekisa ukhuseleko.
Inkqubo yokwenziwa kokufakelwa kwemibhobho kunye neemfuno zezinto eziphathekayo
Umgangatho we-ASTM A252 umisela imigaqo engqongqo yezinto ezisetyenziswa kwizixhobo zokufaka iipayipi. Izixhobo zokufaka iipayipi zinokwenziwa ngezinto ezibunjiweyo, iibhari, iipleyiti, okanye iimveliso zetyhubhu ezidityanisiweyo nezingenamthungo (iipayipi ezidityanisiweyo), kodwa izixhobo kufuneka zibe yintsimbi ecinyiweyo ukuqinisekisa ukuba isakhiwo sixinene. Inkqubo yokwenza ingakhethwa kwi-hammer forging, stamping, extrusion, cold drawing, rolling, golding, welding, machining, kunye nezinye iindlela, okanye indibaniselwano yazo.
Umgangatho ugxininisa ngokukodwa ukuba inkqubo yokwenza akufuneki ibangele naziphi na iziphene eziyingozi kwimveliso. Kwizifakelo zemibhobho ezenziwe kumaqondo obushushu aphezulu, izinga lokuphola kufuneka lilawulwe ngokungqongqo - kufuneka zipholiswe zibe ngaphantsi kobushushu obubalulekileyo phantsi kweemeko ezifanelekileyo, kwaye izinga lokuphola akufuneki libe ngokukhawuleza kunezinga lokuphola lendalo emoyeni ozinzileyo ukuthintela umonakalo wezicubu obangelwa kukupholisa ngokukhawuleza.
Uhlolo olungqongqo: Uqinisekiso loMgangatho ukusuka kwiFektri ukuya kwiSakhiwo soKwakha
EthembekileyoIifektri ze-ASTM A252kufuneka ixhotyiswe ngenkqubo epheleleyo yokuhlola. Imigangatho ichaza ukuba iqela ngalinye leenxalenye zepayipi kufuneka lilandele:
Uvavanyo lokutsalwa: Ukuqinisekisa amandla okuvelisa, amandla okutsalwa kunye nokwandiswa kwezinto
Uvavanyo lokuqina: Qinisekisa ukuba ubunzima bezinto bungaphakathi koluhlu oluvumelekileyo ukuze kuthintelwe ukwaphuka okubuthathaka ngenxa yokuqina okugqithisileyo.
Uvavanyo lwe-hydrostatic: Faka uxinzelelo oluchaziweyo kwizixhobo zombhobho ukuqinisekisa amandla azo okuthwala uxinzelelo kunye nokuqina kwee-welds.
Ukukhetha iiFactories ze-Astm A252 ezinamava akuthethi nje ukufumana iimveliso ezihlangabezana nemigangatho yobukhulu, kodwa nokufumana isibophelelo somgangatho esiye savavanywa izihlandlo ezininzi. Iifektri eziqhelekileyo zinokubonelela ngeengxelo ezipheleleyo zovavanyo kunye namaxwebhu okulandelelwa komgangatho, okubonelela ngesiseko esiqinileyo sokhuseleko kunye nokuthembeka kweeprojekthi zesiseko seenqwaba.
Ixesha leposi: Matshi-13-2026