1, ppr raj tsawv. Ppr yeeb nkab fittings yuav tsum muaj raws li xim, ppr yeeb nkab yuav tsum tau du, du, tsis muaj sag, npuas thiab lwm yam deg zog ntawm qhov tsis xws luag, yuav tsum tsis txhob muaj peev xim pom; ppr yeeb nkab fittings nto yuav tsum du, du, tsis pub kom tawg,, Tev thiab pom tseeb impurities, mob ntsws loj heev thiab tsis sib txig xim, lwj thiab lwm yam teeb meem.
2, ppr yeeb nkab opacity. Ppr yeeb fittings yuav tsum tsis txhob pom kev.
3, ppr yeeb nkab fittings ppr yeeb nkab kab thiab phab ntsa thickness. Raws li GB / T18742.2-2002 lub teb chaws tus qauv, ppr yeeb nkab raws li qhov loj ntawm S5, S4, S3.2, S2.5, S2 tsib series. Ppr yeeb nkab koob S thiab nominal siab coj los sib txuas lus, ppr yeeb fittings specifications nrog ppr yeeb nkab Series S, nominal inch dn * nominal phab ntsa thickness en hais, ppr yeeb nkab fittings tsuas yog kuaj ppr yeeb nkab nominal inch, nruab nrab inch thiab ppr yeeb nkab phab ntsa sib thooj rau ntawm phab ntsa thickness, ppr yeeb nkab fittings bearing loj thiab sib npaug nominal inch.
4, ppr yeeb nkab lub cev thiab txhua yam khoom siv thiab cov khoom siv tshuaj. Ppr xa co hydrostatic kev ntsuam xyuas, cov txheej txheem dej nquag khiav, kev ntsuas hydrostatic stability thiab kev ntsug ntawm qhov kev sib tw ntawm ppr yeeb nkab, kev sib tw nqawm tau yooj yim yog raws li lub teb chaws tus qauv, ppr yeeb tshuaj ntawm cov khoom siv tshuaj ntsuam xyuas Cov ntsiab lus thiab rov kuaj daim ntawv qhia.
5, ppr yeeb fittings fittings kev noj qab haus huv ua tau zoo raws li lub teb chaws tus qauv. Qhov no tuaj yeem kuaj lub tuam tsev saib xyuas kev noj qab haus huv ntawm ppr cov ntaub so ntsig txoj haujlwm kev xeem ntawv.
6, ppr yeeb nkab uas ua tiav. Ppr yeeb fittings yuav tsum txuas rau tom qab 8760 xuab moos thiab 5000 zaug thermal thooj ntawm ob txoj kev kuaj ua ke.
