Pipe joint

A pipe joint for connecting a first fluid pipeline and a second fluid pipeline hermetically, in such a manner that the relative angle therebetween can vary, comprising:

• a first fluid pipeline having a connecting section;
• a second fluid pipeline having a connecting section;
• a ring-shaped sealing ring produced by pressure forming a fine metal wire with a fire-resistant material, comprising an inner circumference sealing surface having a conical tapered shape expanding in diameter towards an open end of the first fluid pipeline, which is provided in the connecting section of the first fluid pipeline;
• an outer circumference sealing seat having a partially convex surface which is provided in the connecting section of the second fluid pipeline, in a position confronting said ring-shaped sealing ring when said first and second fluid pipelines are connected;
• and
• pressure connecting means for causing the inner circumference sealing surface of the ring-shaped sealing ring and said outer circumference sealing seat to contact each other at an area of contact, said contact being under pressure, said area of contact changing in a slidable fashion during varying of said relative angle, said contacting pressure being provided in an elastic manner in a region extending across the connecting sections of both said first and second fluid pipelines.