to coating device 10 coating device 10 is then inserted into angled section 106 second end 158 of pushing unit 150 is then bolted or otherwise fastened to face plate 132 of angled section 106 an inflatable packing gland 138 is then inserted into pushing unit 150 and is positioned around containment tube 60 to form a gas impermeable seal inflatable packing gland 138 prevents gas from escaping pipe 14 while allowing containment tube 60 to pass through hole 142 into pipe 14 once inflatable packing gland 138 is in place gate valve 126 is opened and coating device 10 is pushed through hole 142 and into pipe 14 a length of gas pipe section leading away from split sleeve dresser end 104 may be inspected and treated in the same manner as described above first an operator relocates the coating device 10 the desired distance down pipe 14 the operator then maneuvers the coating device 10 back to the split sleeve dresser 110 inspecting and coating joints or other discontinuities along the way after the section of pipe leading away from split sleeve dresser end 104 has been treated the coating device 10 is returned to angled section 106 gate valve 126 is closed and the pushing unit 150 is removed a cap 136 not shown is then bolted or otherwise fastened to face plate 132 in order to inspect and treat the section of gas pipe extending away from split sleeve dresser end 102 a hole 144 not shown similar to hole 142 is cut into pipe 14 within angled.