BYPASS AND PULSE PIPINGS OF LINE VALVES INCLUDED IN VALVE ASSEMBLIES OF MULTI-LINE MAIN GAS LINES LAID IN ONE PROCESS CORRIDOR Russian patent published in 2022 - IPC F17D3/00 

FIELD: pipelines.

SUBSTANCE: invention relates to the field of operation of main gas lines and can be used for safe implementation of pre-repair (emptying) and pre-launch (filling sections of main gas lines with natural gas) operations, as well as for creating backup pulse gas supply for drives of line, bypass and vent valves included in the valve assemblies when there is possibility of violation of integrity of multi-line main gas lines laid in one process corridor. Bypass and pulse pipings of line valves as part of valve assemblies of multi-line main gas lines laid in one process corridor include bypass and vent gas lines with bypass and vent valves, as well as pulse pipings consisting of: pulse gas collection risers with discharge valves, pulse gas backup supply containers with inlet and outlet gas lines, shutoff valves, and pressure gauges, gas lines of the pulse piping circuits with shutoff and vent valves, vent lines, and check valves, pressure gauges, control and instrumentation sensor cabinets, filters, electropneumatic control units for the pneumatic hydraulic drives of line, bypass, and vent valves included in the valve assemblies of multi-line main gas lines. Switching assemblies are therein mounted on bypass pipings between the bypass and vent valves, said assemblies consisting of bypass gas lines with bypass valves and adjustment valves; switching assemblies are mounted in pulse pipings between the pulse gas collection risers, said assemblies consisting of bypass gas lines with bypass valves and adjustment valves, bypass gas lines with bypass valves are mounted between the bypass piping gas lines and inlet gas lines in the pulse gas backup supply container, a bypass gas line with bypass valve is mounted between the outlet gas lines from the backup pulse gas supply containers.

EFFECT: compensates for the temperature imbalance occurring in valve assemblies when sections of main gas lines are emptied (sudden cooling in the vent line and vent valve area) or filled (sudden heating in the area of pulse gas collection risers) with natural gas.

1 cl, 1 dwg