65-70 degree
Qhov kub tawm tsam ntau yam ntawm no luam yeeb yaj kiab yog feem ntau ntawm 65-70 degree. Tsis pub dhau qhov ntsuas kub no, muab cov yeeb yaj kiab rau pvc tuaj yeem tswj hwm lub luag haujlwm ntawm nws lub cev. Txawm li cas los xij, thaum qhov ntsuas kub tshaj 80 degree, lub cev siv lub cev ntawm pvc yuav poob qis, thiab kev softening thiab kev hloov sab nraud yuav tshwm sim.
Tsis tas li ntawd, PVC Zaj Duab Xis yuav decompose ntawm cov tshuaj kub siab, ua rau cov khoom lag luam hydrogen ntawm cov khoom lag luam, tab sis yuav tsis muaj kev phom sij rau tib neeg kev noj qab haus huv. Yog li ntawd, thaum siv pvc zaj duab xis, zam kev cuam tshuam nrog ib puag ncig kub kom txuas ntxiv nws txoj kev pabcuam lub neej thiab ua kom muaj kev nyab xeeb.