| 摘要 |
FIELD: pipeline engineering. ^ SUBSTANCE: device comprises top and bottom housing members and shelves at the site of the butt. When the device is assembled, it is composed of two cylindrical parts and conical part that connects the cylindrical parts. The device is secured to the stop ring of the protecting casing and bears on the main pipeline. The bottom housing member is provided with two radiused plates that seal the coupling. ^ EFFECT: enhanced reliability. ^ 3 cl, 4 dwg |
