I-flange ingachazwa njengendlela esiza ekuxhumaniseni amapayipi, ama-valve, njll., Ukwakha uhlelo olugcwele lwamapayipi. Kunezigaba eziyisithupha ze-Flange ezisukela ku- # 150 kuya ku- # 2500. Kulawulwa ngamazinga we-B 16,5, i-ASME B16. I-5 Class 300 Flange ihlinzeka umthamo we-300lb.