1, qhov tseeb ntawm tus ppr yeeb nkab zoo: tus ppr yeeb nkab tiag tiag yuav tsum raws li cov qauv iso / dis 15874.2-1999 < kub="" thiab="" txias="" dej="" yas="" yeeb="" nkab="" -="" pp="" thib="" ob="" ntawm="" cov="" yeeb="" nkab="">> cov yeeb nkab yuav tsum tau raws li cov qauv iso / dis 15874.2-1999 < dej="" kub="" thiab="" dej="" txias="" nrog="" cov="" yeeb="" nkab="" yas="" -="" p="" peb="" feem="" ntawm="" cov="" yeeb="" nkab="">>; pseudo ppr yas yeeb nkab thiab yeeb nkab fittings kev ua tau zoo tsis dhau cov lus teev tseg saum toj no. Nws yuav tsum raug sau tseg tias txoj haujlwm pseudo-ppr yas yeeb nkab yog tsuas yog 1 txog 5 xyoos, thaum lub ppr yas yeeb nkab lub neej muaj ntau tshaj 50 xyoo.
2, xyuam xim rau kev siv tag nrho cov kav dej c co (uas yog, qhov zoo tshaj plaws ntawm kev nyab xeeb) los txiav txim siab:
Feem ntau, qhov siv ntev ntev tshaj ≥ 70 ℃, thiab tej zaum yuav ntev ntev rau qhov kev kub ntxhov, qhov yeem c = 1.5; yeem c = 1.5;
3, rau cov dej txias (≤ 40 ℃), siv p.n1.0 ~ 1.6mpa ppr yeeb nkab fittings;
Rau qhov dej kub xaiv ≥ pn2.0mpa ppr yeeb nkab, yeeb nkab fittings.
Tom qab txiav txim siab txog peb lub hauv paus ntsiab lus saum toj no, lub saws ntawm cov kav ppr yuav tsum tsis pub ntau tshaj qhov sdr ntawm cov yeeb nkab, uas yog, cov phab ntsa ntawm cov yeeb nkab yuav tsum tsis pub tsawg dua phab ntsa ntawm cov yeeb nkab loj.
