How far is the installation of fire-fighting pipeline riser from the wall?

The diameter of hydrant water supply system >: 100mm galvanized steel pipe is connected by flange or groove. If the pipe diameter of the automatic sprinkler system is not clear-100 mm, the threaded connection cannot be used. Only the pipe section with pipe diameter ≥ 100mm should be provided with flange connection or groove connection point at a certain distance.

When the pipes of hydrant water supply system and automatic sprinkler system are connected by flanges, it is recommended to use threaded flanges, and when welded flanges are used, they should be galvanized twice. When it is necessary to change the pipe diameter of any pipe section, reducer joints and fittings that meet the standards shall be used.

Extended data:

Requirements for connection of fire-fighting pipelines stipulate:

1, during the bending test at (20 5)℃, there is no filler in the pipe, and the weld is located on the side of the main bending surface.

2. After the test, place the sample at a temperature of (20 5)℃

3. The length of the section specimen is (500±50)mm, and the inlet and outlet of the pipeline are blocked with appropriate measures, and the negative pressure is gradually increased to 660mm Hg from the inlet, and kept at 65438±0min. After the test, check the internal coating.

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