FIREPROOFING TWO-LAYER PIPE JOINT, MANUFACTURE THEROF AND FIREPROOFING TWO-LAYER PIPE CONNECTING PART STRUCTURE USING THIS FIREPROOFING TWO-LAYER PIPE JOINT

摘要

PURPOSE: To provide a fireproofing two-layer pipe joint, its manufacturing method and a fireproofing two-layer pipe connecting part structure using this fireproofing two-layer pipe joint, maintaining stably for a long period a joint processing function in a connecting part between a fireproofing two-layer straight pipe and the fireproofing two-layer pipe joint further to simplify work with no apprehension of overlooking a joint processing part. ;CONSTITUTION: An annular packing 5 formed of an inorganic fiber heat insulating material is previously synthesized in socket end parts 4a, 4a of an outer pipe 4 forming a fireproofing two-layer pipe joint 1, to interpose the annular packing 5 between the socket end parts 4a, 4a of the outer pipe 4 of the fireproofing two-layer pipe joint 1 which must be connected and opening end parts 9a, 9a of outer pipes 9, 9 of fireproofing two-layer straight pipes 6, 6.;COPYRIGHT: (C)1996,JPO