GREAT WALL PIPELINE / HOT TAPPING PIPELINE is committed to provide reliable and economical solutions about Hot Tap and Line Stop to Pipeline Project Contractors all around the world in the field of Water, Oil, Gas, Chemical Industry. The range of our products including Hot Tapping Machine, Line Stop Actuator, Completion Machine, Pipe Cutting Machine, Sandwich Valve, Stopple Fitting, Hot Tapping Fitting,Cutter, Line Stop Head, Sealing Elements and etc. Our products are manufactured according to the European and American standards and total compatible with T.D.Williamson's products .