Gas recovery bag

Abstract

The article relating to the present design is primarily a gas recovery bag used to recover gas from inside gas pipes during gas pipe construction. The article relating to the present design has a bag body formed by heat-sealing the outer edges of a pair of overlapping flexible sheet materials together, and a nozzle attached to the front of the bag body and extending in an L-shape. As shown in Reference Figure 1, which shows the state of use, when the nozzle is placed inside the gas pipe with the bag body contracted, as shown in Reference Figure 2, which also shows the state of use, the gas inside the gas pipe flows into the bag body through the nozzle as the bag body expands.

Images