When welding elbows or tees, pay attention to the direction according to the requirements of the design drawings. In the straight line direction of the pipe fittings and pipes, use auxiliary marks to mark their positions; when connecting, guide the pipe ends into the heating jacket without rotating, and insert When the person reaches the standard depth, push the pipe fittings to the heating head without rotation to the specified mark; after the heating time, remove the pipes and pipe fittings from the heating jacket and the heating head at the same time, and insert them straight without rotation. The marked depth will form a uniform flange at the joint. At this time, the joint can be calibrated, but it is strictly prohibited to rotate; after the specified cooling time, buckle the pipe fitting cover on the pipe fitting.
