Qudhaad Wanaagsan iyo Tegnitaanka Dhererka
Sareega PPR ee biyaha dhawaan la yaqaana waxa uu keenaa jiritaanka aad u fiican iyadoo la isticmaalayo khaasada farsamada iyo sida soo saarka horumar, si loo garante in lagu isticmaalo ilmooyin badan muhiimka biyaha. Qodobbada joogsiga polypropylene random copolymer waxay leedahay ammaan gaarka ah oo ka dhalanaya stress cracking, fatigue failure, iyo degradingta aysaska oo bulshada ay ka iman karaan sareegyada kale. Tijaabado xidhidda wakhtiga lagu darayo waxay muujinaysaa in sareega PPR ee biyaha dhawaan la yaqaana waxay iskudhafaan khaasada farsamada kuwa 50 sano ka badan sharcigooda, iyagoo la tijaabisay haddii ay ku jiraan hadda celcelinta jidka, daboolka, iyo hababka biyaha. Qodobka crystal ee madadaalka waxay keenaa ammaan aad u fiican oo ka dhalanaya creep, si loo eeyo in sareega laga bilaabo qalad ama dib u noqnoqda in ay sabab u noqon karo khalafinta nidaamka. Sareegyada fulmid oo la macneeya galvanic corrosion, electrolysis, ama isku daynta kiimikada, sareega PPR ee biyaha dhawaan la yaqaana waxay isku dhafaan inay tahay kiimikada staaybel dhammaan halganka biyaha, ka dibaddeeda inay tahay acidic ama alkaline. Ammaanka sareega ka dhalanaya scaling iyo deposits mineral waxay iskudhafaan inay tahay flow characteristics muddo buuxda, si loo eeyo in la kala duwanayo in ay yarantahay inay qaataan biyaha iyagoo la isticmaalayo sareegyada fulmid. Tijaabada ammaanka impact waxay muujinaysaa in sareega PPR ee biyaha dhawaan la yaqaana waxay iskudhafaan inay daawasho shuqulka, socodka dhulka, iyo dhibaato aan la raacayo ka badan materials brittle sida cast iron ama clay pipes. Dheerka material waxay keenaa inay celceli karaan expansion iyo contraction bilaashan inta lagama maarmaan inay dhici karaan joint stress ama khalaf, si loo eegto inay socotaa guriga iyo celcelinta jidka bilaashan inay khalaf kartaan nidaamka. Tijaabado freeze-thaw cycling waxay muujinaysaa in sareega PPR ee biyaha dhawaan la yaqaana waxay expand karaan elastically markii biyaha tuurogga dhacdo galo, ka dibna waxay noqdaan meesha hore bilaashan crack ama dib u noqnoqda. Isku daynta UV oo ku jira sida soo saarka waxay ilaaliyaan qaybooda la muujiyey ka horumarka ayska, si loo iskudhafmo khaasada farsamada kaliya sharcigooda ka baxsan. Hababka quality control sida soo saarka waxay iskudhafaan inay tahay thickness, accuracy dimensional, iyo homogeneity ee material oo ka caawiya inay isku dhafaan awood, muddo dheer, iyo inay tahay performance mid ah dhammaan nidaamka sareega PPR ee biyaha dhawaan la yaqaana.
