2 . There is a baffle and fixed flange of the protective confinement casing in the installation, the need to first fill the material after the construction of the baffle and fixed flange. According to the size of the civil drawing beam and shear wall, strictly in accordance with the quality requirements, construction specifications require construction. Protective closed casing is to better deal with there are some underground buildings shall be piped through the wall and according to the place and there are strict moisture-proof provisions.
4 . Pipe diameter and waterproof casing right in the middle with a rotary seal, with a moisture-proof and shock-absorbing effect. Both sides of the protective casing is suitable for Type I human defense, underground buildings, chemical plants, steel, drinking water, wastewater treatment and other pipelines through the wall where strict moisture-proof provisions. Both sides of the protective airtight casing material protective airtight casing is manufactured in accordance with the national industry standard 07FS02 production manufacturing, raw materials selected Q235-A.
