... :Cr25Ni35,HK40,steel 3.ISO9001:2008 Weld Neck Slip on Lap Joint Flange Varieties: threaded flange, slip-on flange (SO), socket welding flange ... can work under presure for long time,advanced testing equipment to ensure thye quality,7.Packing:wooden case,wooden pallet or ... convenient for replacing pipe line; easy to separate and check the situation of pipe line; easy to seal pipe line 12.Application area ...