Isikhokelo seMigangatho yeSimboli seSinyithi seSinyithi seBrazil: NBR7675 kunye neNBR15420:2022 sichaziwe

Umgangatho waseBrazilNBR7675yinkcazo esisiseko yeepayipi zesinyithi ezithambileyo (iipayipi ze-DI) kwizicelo zamanzi, equka:

• Iimfuneko zokwakheka kweekhemikhali kwizixhobo zepayipi (ikhabhoni, isilicon, imanganese, iphosphorus, isalfure, njl.njl.)
• Izalathi zokusebenza koomatshini (amandla okutsalwa ≥420 MPa, amandla okukhupha ≥300 MPa, ukunwebeka ≥10%)
• Ukunyamezelana kobukhulu kunye nemigangatho yobunzima
• Iimfuno zobugcisa zokugquma ngaphakathi nangaphandle
• Imigangatho yovavanyo loxinzelelo lwamanzi

Umgangatho wamva nje,I-NBR15420:2022, luhlaziyo oluphambili kwimigangatho yaseBrazil ngo-2022. I-NBR15420:2022 iqinisa ezi zinto zilandelayo xa ithelekiswa nomgangatho wangaphambili:

• Iimfuneko zokuziqhelanisa nokusingqongileyo: Ziphucula ukumelana nemozulu kunye nokuxhathisa kwe-UV kwiingubo ukuze kujongwane neemeko ezahlukeneyo zemozulu zaseBrazil.
• Iinkcukacha zokusebenza kwe-seismic: Icacisa iimfuno zoyilo kunye nokufakelwa kwemibhobho yesinyithi ethambileyo kwiindawo ezisebenzayo kwi-seismic.
• Imigangatho yozinzo: Yongeza iimfuno zokusetyenziswa kwakhona kwezinto kunye neempawu zovavanyo lomjikelo wobomi.
• Ukuhambelana kwamanzi akrelekrele: Kugcina imigangatho yojongano lobuchwephesha kwiinkqubo zamanzi akrelekrele zexesha elizayo.

Iipayipi zesinyithi ze-DINSEN ezithambileyo azihambelani ngokupheleleyo nemigangatho emibini yaseBrazil, kodwa zikwadlula kuzo kwizalathisi zokusebenza eziphambili.

• Uyilo olunamandla aphezulu: Kuyo yonke i-DN80-DN2600, amandla okutsalwa okwenyani afikelela kwi-450-500 MPa, edlula umgangatho nge-20%.
• Ukwandiswa okugqwesileyo: Ukwandiswa kugcinwa rhoqo kwi-12-15%, okubonelela ngokumelana okuhle kakhulu nokushukuma komhlaba kunye nokuzivumelanisa nomgangatho wesiseko.
• Inkqubo ekhethekileyo yokugquma: Isebenzisa i-primer enobutyebi be-zinc kunye ne-epoxy resin coating esebenza kakuhle, iphumelele uvavanyo lokutshiza ityuwa kangangeeyure ezingaphezu kwama-3000, idlula kakhulu iimfuno ezisemgangathweni.

Imibhobho yentsimbi ye-DINSEN ductile, igqitha imigangatho yaseBrazil i-NBR7675 kunye ne-NBR15420:2022 ngomgangatho, idibene nokuqonda okunzulu iimfuno ezizodwa zemarike yaseBrazil, ibonelela ngezisombululo zemibhobho ezinokuthenjwa, ezingabizi, nezizinzileyo kwiiprojekthi zamanzi. Asingomthengisi wemveliso kuphela kodwa sikwaliqabane lexesha elide kuphuhliso lweziseko zophuhliso zaseBrazil, sizibophelele ekuphuculeni ukhuseleko nokusebenza kakuhle kweenkqubo zamanzi zaseBrazil ngokusebenzisa ubuchwepheshe obutsha.

Ukuze ufumane ulwazi oluthe kratya malunga neenkcukacha zobugcisa kunye nemizekelo yeprojekthi yeepayipi zesinyithi ze-DINSEN ezihambelana nemigangatho yaseBrazil, ncedaQhagamshelana nathiyedatha yobugcisa.