AWWA C207-07 ndi muyezo wofalitsidwa ndi American Water Works Association (AWWA) womwe umalongosola kukula, kulolerana, ndi zida zamapaipi achitsulo omwe amagwiritsidwa ntchito m'makina opangira madzi. Ma flange a Class D hub adapangidwa kuti azigwiritsidwa ntchito mokhazikika mpaka pakupanikizika kwambiri pamakina ogawa madzi.
Ma Class D hub flanges amasankhidwa kutengera kukakamizidwa kwawo ndipo nthawi zambiri amagwiritsidwa ntchito m'malo oyeretsera madzi, malo osungira madzi oyipa, ndi ma network operekera madzi amtawuni. Ma flanges awa adapangidwa kuti azilumikizana mwamphamvu komanso motetezeka pakati pa mapaipi, mavavu, ndi zomangira pakugwiritsa ntchito madzi.
Mu AWWA C207-07, Class D hub flanges amatchulidwa kutengera miyeso yosiyanasiyana, kuphatikiza mainchesi a flange, bolt hole diameter, bawuti mozungulira bwalo, makulidwe a hub, miyeso yoyang'ana, ndi makulidwe ake. Zolemba izi zimatsimikizira kuti ma flanges amakwaniritsa miyezo yofunikira ndipo amapereka kuyanjanitsa koyenera ndi kusindikiza akalumikizidwa ndi mapaipi.
Ma flange a Class D hub nthawi zambiri amapangidwa kuchokera ku zinthu monga chitsulo cha kaboni kapena chitsulo chosapanga dzimbiri kuti zitsimikizire kulimba komanso kukana dzimbiri pakugwiritsa ntchito madzi. Malo okwera pakati pa flange amapereka mphamvu zowonjezera ndi chithandizo pamene akugwirizanitsa ndi mapaipi kapena ma valve.
Ponseponse, AWWA C207-07 Class D hub flanges ndizofunikira kwambiri pamakina ogawa madzi, kupereka kulumikizana kodalirika komanso kopanda kutayikira kwa zomangamanga zamapaipi m'malo oyeretsera madzi ndi ma network operekera madzi amtawuni.
