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Even the box connected to the main starting valve openings and the role of boards and knives into one of possession. Even the upper part of me with a model J13H-160 cut-off valves, opening operation for the emission of air and media. The explosive opening of the pipeline operations, can also make use of the valve box to even inject nitrogen protection and flange plug at home on the welding quality control, equipment to connect the sealing surface to conduct strees testing, and stress balance, and manages on to the flange jamming in the mother the welding quality, the equipment joint face seal situation carries on the pressure inspection, as well as pressure balance and so on.