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Fire trench pipe fittings manufacturers talk about common pipes and accessories for fire water supply systems

2022/09/30

This chapter introduces the pipes and accessories commonly used in the fire water supply system, and summarizes their categories to help people better understand memory.

1. Commonly used pipes

Fire trench pipe fittings manufacturers believe that the pipes commonly used in fire water supply systems include ductile iron pipes, welded steel pipes, seamless steel pipes, brass pipes, stainless steel pipes, alloy pipes and composite pipes. Plastic pipes can also be used as fire water supply pipes. There are strict restrictions on the installation location and installation form.

1. Ductile iron pipe

Ductile iron pipes are mainly used for buried pipelines in front of the alarm valve of automatic sprinkler systems and buried pipelines of fire hydrant systems. Fire-fighting projects often use old ink beads with a specification of DN40~DN250.

2. Welded steel pipe

Fire trench pipe fittings manufacturers believe that welded steel pipes for fire water supply systems can be divided into ordinary welded steel pipes and hot-dip galvanized welded steel pipes.

(1) Ordinary welded steel pipes are suitable for buried pipes of fire hydrant water supply systems. The piping before the alarm valve of automatic sprinkler systems and water spray systems must have filters added before the alarm valve. When the welded steel pipe is buried in the ground, anti-corrosion treatment should be carried out according to relevant requirements. Otherwise, it is easy to rust and affect the life.

(2) Hot-dip galvanized welded steel pipe is suitable for buried and overhead pipelines of fire hydrant water supply system, automatic spray fire extinguishing system and water spray fire extinguishing system. Anti-corrosion measures should also be considered when used in stores.

3. Seamless steel pipe

According to its production process, seamless steel pipes are mainly divided into two types: hot rolling and cold drawing. According to the material, it can be divided into ordinary carbon steel, high-quality carbon steel, ordinary low-alloy steel and alloy steel.

The seamless steel pipe has strong compressive ability, and is often used as the main pipeline or the pipeline in the lower part of the system with high working pressure in the fire water supply system.

4. Brass, stainless steel pipe, alloy pipe and steel mesh skeleton plastic composite pipe

This kind of pipe is not easy to rust and has good hydraulic performance, which is suitable for fire water supply system. However, fire trench pipe fitting manufacturers believe that these pipes are relatively expensive and are rarely used in engineering practice. Also, please note that the barbed wire skeleton plastic composite pipe can only be used as a store.

5. Plastic pipes

my country's fire water supply system rarely uses plastic pipes, but many developed countries in foreign countries allow the use of PVC-C (chlorinated polyvinyl chloride) plastic pipes in some places. This pipe is light in weight, easy to install and has a long service life, but its pipe machinery The performance and fire resistance are not good, and there are clear requirements for the installation location and installation form. The newly revised self-spraying design specification in the 2017 edition has introduced this kind of pipe.

Second, fire trench pipe fittings manufacturers talk about common accessories

In order to meet the needs of fire-fighting water supply, fire-fighting water supply pipes are often equipped with water supply accessories to control the size of the water flow, the direction of the water, and the pressure of the pipeline. Typical water supply accessories include gate valves, butterfly valves, globe valves, check valves, pressure gauges and automatic exhaust valves.

1) Gate valve and globe valve are open and closed objects, which are valves that cut off or open water flow.

2) The butterfly valve mainly plays the role of cutting off and regulating the flow in the pipeline.

3) The check valve is a valve that prevents the backflow of fire water.

4) Pressure gauges are used to monitor the pressure conditions in various parts of the system to ensure the safety of equipment operation.

5) The automatic exhaust valve is the highest point installed on the fire water supply pipeline to automatically release the gas generated by the water supply pipeline.