| 摘要 |
FIELD: pipeline transport. ^ SUBSTANCE: service hatch comprises traverses that are arranged parallel to the pipeline and connect the flanges of the pipeline, rotating lid mounted on the traverse by means of rotatable cantilevers and made of a section of the pipeline composed of two telescopic pipes provided with seals and flanges, and rotatable cantilevers provided with dummy and ring sealing disks. ^ EFFECT: reduced labor consumption for repairing and enhanced safety. ^ 1 cl, 2 dwg |
