... is used for aluminium welding joint one-side welding. 2,ceramic arc welding equipment This welding backing is used for aluminium ... welding."Yuan Hang"JN series welding backing is widely used in shipbuilding, chemical industry, bridge, pressurecontainer , stainless steel and so on ... of CCS, ABS, GL ,LR, BV, DNV and so on. Ceramic welding back up tape JN-1401