Umgangatho we-EN877 ziimpawu kunye neendlela zovavanyo lweenkqubo zemibhobho yesinyithi esityhidiweyo kunye nezixhobo zokufakelwa kombane wobunjineli. I-EN877:2021 luhlaziyo olongezelelweyo kunye nokulungiswa okusekwe kwi-EN877:1999. Uluhlu lobubanzi oluqhelekileyo olugutyungelweyo luqala kwi-DN 40 ukuya kwi-DN 600 (kuquka), kwaye isinyithi esityhidiweyo siquka isinyithi esingwevu esityhidiweyo kunye nesinyithi esithambileyo.
Iimfuno zezinto eziphathekayo zibanzi kwaye zichanekile:
1.I-BS EN 877:1999+A1:2006: Igxile kakhulu kwintsimbi engwevu.
2.EN 877:2021: Iquka ngokucacileyo izinto ezimbini: intsimbi engwevu kunye nentsimbi ethambileyo. Ukwakheka kweekhemikhali, iimpawu zoomatshini (ezifana namandla okutsalwa, ukunwebeka), ulwakhiwo lwe-metallographic kunye nezinye iimfuno zezi zinto zimbini zichazwe ngokweenkcukacha nangobunono (kubhekiswa kwimigangatho emitsha yezinto ezifana ne-EN 1561, EN 1563). Oku kubonelela ngokuguquguquka okukhulu ekukhetheni izinto kwaye kuqinisekisa ukuhambelana nokusebenza kweemveliso zentsimbi ethambileyo.
Iindlela zoqhagamshelo zintsha kwaye zahlukahlukene:
1.BS EN 877:1999+A1:2006: Ijolise kakhulu kwizinto zemveliizihlanganisi zesokhethi(itywinwe ngee-rubber seals okanye ii-lead/caulking compounds).
2. EN877:2021: Yandisa kakhulu iindlela zonxibelelwano, kuquka ngokucacileyo:Izihlanganisi zesokhethi (zisesembindini). Izihlanganisi zoomatshini (ukudibanisa imibhobho, i-clamp, njl.njl.). Izihlanganisi ezidityanisiweyo.Izihlanganisi zeFlange.Ubukhulu, ukunyamezelana, iimfuno zokusebenza kunye neendlela zovavanyo zohlobo ngalunye loqhagamshelo zichazwe ngokweenkcukacha. Oku kubonisa uphuhliso olwahlukeneyo lwetekhnoloji yoqhagamshelo kwimarike.
Iimfuno zokusebenza ezingqongqo nezibanzi,I-DINSEN iza kuqhubeka nokuhlaziya umxholo ofanelekileyo.:
1. Uxinzelelo lovavanyo lokuqina kwamanzi olongezelelekileyo: Lo mgangatho mtsha ufuna uxinzelelo oluphezulu lovavanyo ukuqinisekisa ukusebenza kokutywina kwamalungu phantsi koxinzelelo oluhle nolubi.
2. Ukufakwa kwesandi kuba yimfuneko enyanzelekileyo: Le yenye yezona nguqu zibalulekileyo. I-EN 877:2021 yenza uvavanyo lokufakwa kwesandi elebhu kwiipayipi kunye neenkqubo zokufakelwa lube yimfuneko (ngokwe-EN 14366) kwaye ichaza amaxabiso amancinci okufakwa kwesandi ekufuneka afezekiswe (umz., umahluko obonakalayo wenqanaba loxinzelelo lwesandi Dn,e,w ≥ 45 dB). I-BS EN 877:1999 ayinazo iimfuno zokufakwa kwesandi ezinyanzelekileyo.
3. Ukumelana nomlilo: Iimfuno zokumelana nomlilo zingahlaziywa okanye zichazwe ngokucacileyo (njengoluhlu lwemigangatho ye-EN 1366).
4. Amandla oomatshini: Iimfuneko zokusebenza koomatshini kwimibhobho kunye nezixhobo ezifana nokumelana noxinzelelo kunye nokumelana nempembelelo zinokulungiswa okanye zichazwe ngokuchanekileyo.
5. Ukumelana nokugqwala ngamakhemikhali: Iimfuno zingahlaziywa okanye zichazwe ngakumbi.
I-EN 877:2021 luxwebhu olunye olusemgangathweni oludibeneyo olunesakhiwo kunye nenkcazo ecacileyo neyanamhlanje.
Ixesha leposi: Julayi-21-2025
