SAETT ATT FOERENA ETT INRE METALLROER MED ETT YTTRE OMGIVANDE METALLROER MED HJAELP AV EXPLOSIONSSVETSNING

摘要

A method of joining an inner metal pipe with a surrounding outer metal pipe comprising placing inside the inner pipe a contact body which prevents change of the inside diameter of the inner pipe and detonating an explosive around the outer pipe so that the inner surface of the outer pipe is metallurgically joined to the outer surface of the inner pipe. The contact body is a rigid body made of salt and the contact body is removed after the pipes are joined by dissolving the contact body in a fluid in which the salt is soluable.