Installation of smoke exhaust pipe and accessories
1. The smoke exhaust pipe should be steel pipe or cast iron pipe. When
welded steel pipe is used, its wall thickness shall be greater than 3mm;
The pipe connection should be welded. When flange connection is
adopted, the flange surface shall be flat and provided with sealing
groove; Heat resistant rubber gasket shall be padded between flanges.
2. Cast iron smoke exhaust pipes buried in concrete should be connected with flanges.
3. The smoke exhaust pipe shall be provided with thermal expansion
compensator along the axis direction. The expansion joint of one-way
casing shall be concentric with the front and rear smoke exhaust pipes.
The connecting section between the exhaust pipe of diesel engine and the
main exhaust pipe shall be provided with buffer facilities.
4. The installation of smoke exhaust pipe shall comply with the following provisions:
(1) The gradient shall be greater than 0.5%, and the drain valve shall be set at the lowest point;
(2) The blocking plate of cleaning hole shall be provided with heat-resistant cushion and fixed tightly;
(3) When the smoke exhaust pipe passes through the partition wall, the surrounding gap shall be filled with asbestos rope;
（4）排烟管与排烟道连接处，应锈钢铸件 保定建筑设计 螺杆式启闭机 保定搬家 电缆挂钩 保定室内设计培训 冲压机预埋带有法兰及密闭翼环的密闭穿墙短管。
(4) The connection between the smoke exhaust pipe and the smoke exhaust
duct shall be embedded with a closed through wall short pipe with flange
and closed wing ring.
(5) The ground outlet end of the smoke exhaust pipe shall be equipped
with a rain cap; Measures shall be taken to prevent the smoke exhaust
pipe from blocking at the place 150 ~ 200mm above the ground