Tekanyetso ea EN877 ke litšobotsi le mekhoa ea liteko tsa litsamaiso tsa liphaephe tsa tšepe e entsoeng ka tšepe le li-fittings bakeng sa ho ntša metsi ka boenjiniere. EN877:2021 ke ntlafatso e 'ngoe le ntlafatso e thehiloeng ho EN877:1999. Sebaka sa bophara bo tloaelehileng se koahetsoeng se tloha ho DN 40 ho isa ho DN 600 (ho kenyeletsoa), 'me tšepe e entsoeng ka tšepe e kenyelletsa tšepe e putsoa le tšepe e ductile.
Litlhoko tsa thepa li pharaletse ebile li nepahetse haholoanyane:
1.BS EN 877:1999+A1:2006: E shebane haholo-holo le tšepe e putsoa.
2.EN 877:2021: E akaretsa ka ho hlaka thepa e 'meli: tšepe e putsoa le tšepe e ductile. Sebopeho sa lik'hemik'hale, thepa ea mechini (joalo ka matla a ho tensile, ho lelefala), sebopeho sa metallographic le litlhoko tse ling tsa thepa ena e 'meli li hlalositsoe ka botlalo le ka nepo (ho buuoa ka litekanyetso tse ncha tsa thepa tse kang EN 1561, EN 1563). Sena se fana ka ho tenyetseha ho hoholo khethong ea thepa 'me se netefatsa ho lumellana le ts'ebetso ea lihlahisoa tsa tšepe e ductile.
Mekhoa ea khokahano ke ea sejoale-joale ebile e fapane haholo:
1.BS EN 877:1999+A1:2006: E shebane haholo le tsa setsomanonyeletso a sokete(e tiisitsoe ka litiiso tsa rabara kapa metsoako ea loto/caulking).
2. EN877:2021: E atolosa haholo mekhoa ea khokahano, e kenyelletsa ka ho hlaka:Likotlolo tsa sokete (e ntse e le karolo ea mantlha). Likotlolo tsa mechine (kopano ea liphaephe, setlamo, jj.). Likotlolo tse tjheselitsoeng.Manonyeletso a Flange.Litekanyo, mamello, litlhoko tsa ts'ebetso le mekhoa ea liteko bakeng sa mofuta o mong le o mong oa khokahano li hlalositsoe ka botlalo. Sena se bonts'a nts'etsopele e fapaneng ea theknoloji ea khokahano 'marakeng.
Litlhoko tse thata le tse felletseng tsa ts'ebetso,DINSEN e tla tswela pele ho ntlafatsa dikahare tse amehang.:
1.Khatello e eketsehileng ea teko ea ho se kene metsi: Tekanyetso e ncha e hloka khatello e phahameng ea teko ho netefatsa ts'ebetso ea ho koala manonyeletso tlas'a khatello e ntle le e mpe.
2. Ho thibela modumo ho fetoha tlhoko e tlamang: Ena ke e 'ngoe ea liphetoho tsa bohlokoa ka ho fetisisa. EN 877:2021 e etsa hore tlhahlobo ea ho thibela modumo ea laboratori ea liphaephe le litsamaiso tsa ho kenya e be ea tlamang (ho latela EN 14366) 'me e totobatsa boleng bo tlase ba ho thibela modumo bo lokelang ho fihlelloa (mohlala, phapang e bonahalang ea boemo ba khatello ea modumo Dn,e,w ≥ 45 dB). BS EN 877:1999 ha e na litlhoko tse tlamang tsa ho thibela modumo.
3.Khanyetso ea mollo: Litlhoko tsa khanyetso ea mollo li ka ntlafatsoa kapa tsa hlalosoa ka ho hlaka haholoanyane (joalo ka letoto la litekanyetso tsa EN 1366).
4. Matla a mechini: Litlhoko tsa ts'ebetso ea mechini bakeng sa liphaephe le li-fitting tse kang khanyetso ea khatello le khanyetso ea tšusumetso li ka fetoloa kapa tsa hlalosoa ka nepo haholoanyane.
5. Ho hanyetsa ho bola ha lik'hemik'hale: Litlhoko li ka ntlafatsoa kapa tsa hlalosoa ka botlalo.
EN 877:2021 ke tokomane e le 'ngoe e kopaneng e tloaelehileng e nang le sebopeho le tlhahiso e hlakileng le ea sejoale-joale.
Nako ea poso: Phupu-21-2025
