I-flange ingachazwa njengendlela enceda ekunxibelelaneni imibhobho, i-valves, njl., Ukwenza inkqubo yokulinganisa epheleleyo. Kukho iiklasi ezithandathu zeflethi zisusela kwi # 150 ukuya # 2500. Imigangatho elawulwa yi-13,5 yemigangatho, i-ASTE B16. I-5 Class 300 Flange ibonelela ngobuchule boxinzelelo lwe-300lb.