... . Win a high admiration and is widely trusted at home and abroad.5. All goods are strictly monitored and ... 6. We keep close relationship with Fedex, DHL, UPS, TNT and other express companies for quick delivery. main production equipmentsFlange:1 ... heater tube, water heater tube, water kettle heating tube.3.The materials of flanges are stainless steel, steel, copper, brass, aluminum, etc..4.With One ...