Pressure test njira ya kuthamanga kuchepetsa vavu

¢Ù Mayeso amphamvu avalve kuchepetsa kuthamanga Nthawi zambiri amasonkhanitsidwa pambuyo pa mayeso amodzi, ndipo amathanso kuyesedwa pambuyo pa msonkhano. Kutalika kwa kuyesa mphamvu: 1 min kwa DN 150 mm. Pambuyo pa mvuvuzo zimawotchedwa ndi zigawozo, kuyesa mphamvu kudzachitika ndi mpweya pa nthawi ya 1.5 ya kuthamanga kwakukulu mutatha kugwiritsa ntchito valve yochepetsera mphamvu.

¢ Ú Mayeso osindikiza adzachitidwa molingana ndi sing'anga yeniyeni yogwirira ntchito. Mukamagwiritsa ntchito mpweya kapena madzi, kuyezetsa kudzachitika pa 1.1 nthawi za kukakamiza mwadzina; pogwiritsira ntchito nthunzi, mayeserowa adzachitidwa pamtunda wovomerezeka wogwira ntchito pansi pa kutentha kwa ntchito. Kusiyana pakati pa kukakamiza kolowera ndi kutulutsa kotulutsa sikuyenera kukhala kochepera 0.2MPa. Njira yoyesera ndi: pambuyo pa kukakamiza kolowera kukhazikitsidwa, pang'onopang'ono sinthani zomangira zosinthira valavu, kuti kutulutsa kotulukako kungasinthe mosasunthika komanso mosalekeza pamlingo wokulirapo komanso wocheperako, osasunthika komanso kupanikizana. Kwa valavu yochepetsera mphamvu ya nthunzi, pamene kulowetsedwa kumasinthidwa, kutseka valavu yotsekera kumbuyo kwa valve, ndipo kuthamanga kwa kutuluka ndipamwamba kwambiri komanso mtengo wotsika kwambiri. Pakadutsa mphindi 2, kuyamikira kwa kutulutsa mpweya kuyenera kukwaniritsa zomwe zili mu tebulo 4.176-22, ndipo kuchuluka kwa chitoliro kumbuyo kwa valve kuyenera kukwaniritsa zomwe zili mu tebulo 4.18. Kwa valavu yochepetsetsa yamadzi ndi mpweya, pamene kulowetsedwa kwa cholowera kusinthidwa ndipo kutulutsa kotulutsa ndi zero, kutseka valavu yochepetsera kusindikiza Kuyesedwa kumakhala koyenera ngati palibe kutayikira mkati mwa mphindi ziwiri.