Method of welding metal pipe sections with explosives.

摘要

There is disclosed a method for the explosive welding together of sections (2, 4) of large diameter metal pipe of the kind used in the construction of high volume oil and gas pipelines. In the method, internal (6) and external (7) band charges of welding explosive are simultaneously detonated adjacent to overlapped telescoped pipe ends. (1, 3).
<??>The velocity of detonation of the initiating explosive is selected so that welding charges (6, 7) are simultaneously detonated around the pipes while maintaining the detonation fronts at superimposed locations and at a large angle to the pipe axis. This avoids unbalancing forces on the pipes and minimizes the collision of circumferential shock waves thus preventing pipe damage and imperfect welds.