Fire-fighting pipelines are pipeline materials that are used in fire protection, fire-fighting equipment and equipment, fire-fighting water, gas, or other media. Because fire-fighting pipelines are often in a static state, they also require stringent piping requirements. The pipelines need pressure resistance, corrosion resistance, and high temperature resistance. The following Xiao Bian will give you an introduction to the installation of fire protection pipelines. I hope to help everyone.
Fire pipe installation specification
1. When the fire protection pipeline thread connection pipeline is reduced, the thread connection should adopt the different diameter pipe parts to avoid the use of the core. If you need to fill the core, the elbow can not be used up and down, only one can be used on the three-way parts, and no more than two on the four-way parts. Threaded packing should be evenly attached to the threaded part of the pipe. When tightening the threads, do not squeeze the sealed material into the tube. Clean the outside after connecting.
2. The difference between the diameters of different-diameter pipes should not exceed 50mm when the fire protection pipe is welded and welded. If it is larger than 50mm, the size should be used for welding. The surface shall not have cracks, air holes, slag inclusions, or fusion spatter. Undercuts, dents, misaligned joints, etc.
3, casing
(1) The pipeline shall pass through the wall, the casing shall be added over the floor, and the weld of the pipeline shall not be placed in the casing. The length of the casing through the wall shall not be less than the thickness of the wall.
(2) Floor tube casing should be 50mm above the floor or floor.
4. Pipeline reinforcement pipelines use pipe hangers and sway braces, which also need to meet the following requirements:
(1) A sway bracing should be installed on the water distribution pipe or water distribution pipe with a pipe diameter of 50 mm or more. If the pipe is too long or changes direction, a sway bracing bracket must be added.
(2) At least one hanger shall be provided on the pipe section between two adjacent nozzles. When the nozzle spacing is less than 1.8m, it can be set at intervals.
(3) The hanger and sway bracing should be directly fixed to the building, and the installation location should meet the requirements of the specification.
5, fire pipe installation
(1) There shall be no other water facilities on the pipeline after the alarm valve, and galvanized steel pipes or galvanized seamless steel pipes shall be used.
(2) Automatic sprinkler piping shall be provided with slopes and sloped drains or auxiliary drains. The slope of the wet pipe of the wet system should not be less than 0.002°, and the slope of the water distribution pipe and the water distribution pipe should not be less than 0.005°.
(3) The diameter of all water distribution pipes or water distribution pipes should not be less than 25mm.
6, decompression orifice plate and throttling device
(1) It should be installed on a horizontal pipe section with a diameter of 50mm or more.
(2) The orifice plate shall be installed on the side of the pipe from the downstream side of the turn of the water flow, and the distance from the bend pipe shall not be less than twice the diameter of the pipe section.
(3) The length of the throttle tube should not be less than 1.0m.
7. The pipeline color matching fire-fighting water mains and water distribution pipelines shall be marked with red or red rings to distinguish other pipelines.
Fire pipe installation precautions
Before installing the pipeline, you must select a suitable installation area and prepare it for installation. For the scope of installation, fire-fighting pipelines are generally applicable to the installation of indoor fire-fighting automatic sprinkler systems and fire hydrant systems for civil and general industrial buildings.
Regarding construction preparation, the most important thing is to choose the right construction materials. First of all, for the fire-fighting spray pipe, it is necessary to choose according to the design requirements. Generally, galvanized carbon steel pipe and pipe fittings are selected. The reasons include that the pipe has the advantages of uniform galvanizing inside and outside, no rust, no fly burr, etc., and can greatly prolong the service life of the device when used. Second, we must choose the right fire hydrant system pipe. For fire hydrants, carbon steel pipes or seamless steel pipes are generally selected. It is better not to have bends, rust, heavy skins, or irregularities. Of course, users can choose according to their own conditions, but they must meet the design requirements. The third is the selection of the main components of the alarm valve, action valve, control valve, retarder, water flow indicator, and water pump combiner. It is necessary to maintain complete accessories and casting rules, and the design of each accessory complies with relevant standards. Fourth, select the appropriate sprinkler head, its specifications, type, operating temperature should meet the design requirements, and to ensure that its appearance rules, complete threading. Fifth, the choice of fire hydrant cabinet can not be ignored, to maintain the box Founder, complete box accessories, but also has closed flexible, close tight, sealed packing intact, a product factory certificate and other characteristics.
At present, with the development requirements, various new fire-fighting pipe materials and connection technologies continue to emerge and have been effectively applied in various practical projects. All of these need to be summarized so that various fire-fighting pipe materials can be used in various fire-fighting system applications. Accurate and economical.
The above is a brief introduction for Xiaobian. If you want to know more related information, please continue to pay attention to Qijia Consulting. More exciting consultation, please stay tuned.
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