The Line Connecting The Two Vertical Balls Is The Pipeline Direction Line Controlled By The Stainless Steel Two-piece Ball Valve

The line connecting the two plumb balls is the direction line of the pipeline controlled by the stainless steel two-piece ball valve

Before we measure the jacking pipe, we should first dig a jacking working pit, then lead the center line of the ground 2 Piece Ball Valve control pipeline to the pit wall, drive the center line nails, and calibrate the center line direction. When we measure the center line of the jacking pipe, we must first tighten a thin line between the two center line nails, hang two plumb balls on the line, and the line connecting the two plumb balls is the direction line of the pipeline controlled by the two-piece ball valve.

In order to ensure the accuracy of the center line measurement, the distance between the two plumb lines should be as far as possible. It should be known that the longer the jacking distance of the pipeline controlled by the two-piece ball valve, the greater the deviation will be, so after every 30~40 meters of jacking, we must use the theodolite to detect it once, which is something we must pay attention to.