Fire Water Supply Pipe Material Selection (Galvanized Steel Pipe, Ductile Iron Pipe, Seamless Steel Pipe, Etc.)

The text of the key involved in many fire safety water supply equipment common pipe and fittings, in order to help the guys can be stronger understanding of the memory, to carry out a small summary of its sub-categories.

First, common pipe

Fire water supply system software common pipe key contains ductile pipe, welded steel pipe, galvanized steel pipe, seamless pipe, air-conditioning copper pipe, stainless steel pipe, alloy steel pipe and composite pipe, plastic pipe can also be done for fire water supply pipe application, but its installation site and installation methods have harsh limitations.

1.Ductile Pipe

Ductile Pipe

Ductile pipe is mainly used for direct buried pipe before wet alarm valve of automatic sprinkler system and direct buried pipe of fire sprinkler system. The common specification model of ductile pipe for fire protection installation project is DN40～DN250.

2. Welded steel pipe

General hot-dip galvanized steel pipe

Fire water supply system software with welded steel pipe can be divided into general welded steel pipe, hot-dip galvanized welded steel pipe two kinds.

(1) general welded steel pipe for fire hydrant water supply and drainage system software direct buried pipeline; automatic sprinkler automatic fire extinguishing system and water sprayer automatic fire extinguishing system wet alarm valve before the pipeline, in the wet alarm valve in front of the provisions of the additional filtration device. Welded steel pipe in the buried application, should be done in accordance with the relevant provisions of the anti-corrosion solution, otherwise easy to cause rust, jeopardizing the use of term.

(2) hot-dip galvanized welded steel pipe is suitable for fire hydrant water supply and drainage system software, automatic self-spraying automatic fire extinguishing system and water sprayer automatic fire extinguishing system directly buried, air frame pipeline. Its application in the buried, should also take into account the anti-corrosion countermeasures.

3. Seamless pipe

Seamless pipe

Seamless pipe according to its production process is divided into hot-drawn, cold-drawn two. According to the raw material, it can be divided into carbon structural steel, high quality alloy steel, general high alloy steel and alloy tool steel.

Seamless pipe has a good ability to work under pressure, in the fire water supply system software, often used as the main pole pipe or system software under the pressure of the higher position of the pipeline.

4. Air conditioning copper pipe, stainless steel pipe, alloy steel pipe and steel skeleton composite pipe plastic composite pipe

Steel skeleton composite tube composite plastic hose

This type of pipe is not easy to rust, good hydroelectric characteristics, suitable for fire water supply system software. But this kind of pipe relative engineering cost is higher, in the engineering project practical activities in the use of less. In addition to pay attention to the steel skeleton composite pipe plastic composite pipe only buried applications.

5. Plastic pipe

PVC-C (titanic acid isopropyl ester polyethylene) plastic pipe material

In China's fire water supply system software selection of plastic pipe material situation is relatively rare, but some countries allow a part of the site selection of PVC-C (titanic acid isopropyl ester polyethylene) plastic pipe material, this type of pipe pipe lightweight, easy to install, long service life, but the physical properties of its pipe and fire characteristics of the poor, on the installation site and the installation of a clearly defined way, the 2017 version of the newly revised sprinkler system design standards have long been Introduced this kind of pipe, can be applied in some sites with smaller risk factors.

Second, common accessories

In order to achieve the necessity of fire safety power supply, the fire supply pipe will often set some power supply fittings for manipulating the size of the water flow, the orientation of the water flow, the working pressure of the pipe and so on. Common power supply fittings are shut-off valves, disk valves, shut-off valves, check valves, air pressure gauges, automatic exhaust valves and so on.

1) Globe valves and shut-off valves are categorized as opening and closing parts, which are gate valves that disconnect the water flow or open the water flow.

(2) Disc valve in the pipeline key to disconnect and adjust the total flow of efficacy.

(3) The check valve is a gate valve to avoid backflow of fire water.

(4) Air pressure gauges are used to monitor the pressure resistance of various parts of the system to ensure the safety factor of machine and equipment operation.

(5) Automatic exhaust valves are installed at the highest point of the fire safety supply piping and are used to automatically release the vapors caused in the supply piping.