As we all know that there are three standards of fire pipes are most used in our projects, ASTM A795 firefighting pipes, UL852 fire pipes, and ASTM A53 fire pipes. Today we will focus on ASTM A795 firefighting pipes.
ASTM A795 is a standard specification for black and hot-dipped zinc-coated (galvanized) welded and seamless steel pipe for fire protection use. This specification covers nominal wall thickness welded tubes and seamless tubes that are to be used for the conveyance of water in fire protection systems. The standard also covers the joining of the pipe to fittings and other fire protection system components.
Fire protection applications require a high level of reliability and safety. In the event of a fire, the protection system must have the ability to deliver an adequate supply of water to extinguish the flames and protect property and lives. ASTM A795 is the most commonly used pipe specification for fire protection systems due to its strength, corrosion resistance, availability, and cost-effectiveness.
ASTM A795 pipes are commonly used in both wet and dry fire protection systems. Wet fire protection systems use water as a fire suppression agent and constantly keep the piping system full of water. On the other hand, dry fire protection systems, such as when installing it in cold environments, have pressurized air inside the pipes, and the water is released only when the system is activated. Pipes that are used in dry systems require a higher level of corrosion protection due to the air inside.
The ASTM A795 standard specifies various dimensions and properties of the pipes. The pipes can have a wall thickness from Sch.10 to Sch.40, and can range in nominal size from 1/2 inches to 18 inches. For pipes with a diameter greater than two inches, the standard requires them to be welded longitudinally by the electric resistance welding (ERW) process. For all pipes, the standard requires them to be hot-dipped galvanized after forming. You can customize your ASTM A795 firefighting pipes in BAOLAI®- fire pipes manufacturer in China.
The galvanization process involves applying a zinc coating to the pipe to protect it from corrosion. This process ensures that the pipes are protected from the corrosive elements that may be present in the fire suppression system, such as acids or other chemicals. The zinc coating also protects the pipe from corrosion caused by moisture in the environment.
ASTM A795 pipes can be used in a variety of fire protection systems, including standpipes, fire sprinkler systems, and fire hydrants. Standpipes are vertical pipes installed in a building to supply water to the firefighters' hoses during a fire. Fire sprinkler systems are systems that automatically detect fires and trigger sprinklers to dispense water onto the flames. Fire hydrants are outdoor water sources that firefighters can connect to during an emergency.
Installation of the ASTM A795 pipes requires adherence to the manufacturer's instructions, proper handling, and preparation of the pipe, and correct installation procedures. The standard specifies several joining methods such as threaded, grooved, and fixed flange joining methods. Threaded joints require the installation of a thread sealant to ensure a tight fit and prevent leaks. Grooved joints utilize a mechanical coupling that is made up of two grooved-end fittings that encase a gasket. The mechanically squeezed gasket creates a seal that prevents leaks.
In conclusion, ASTM A795 pipes are the industry standard for fire protection systems due to their strength, durability, and corrosion resistance. The pipes can be used in both wet and dry fire protection systems and are available in various sizes and wall thicknesses. Proper installation of the pipes requires adherence to the manufacturer's instructions and proper handling procedures. The standard specifies several joining methods that are designed to create a leak-proof seal. The use of ASTM A795 pipes ensures the safety and reliable operation of the fire protection system, which has a direct impact on protecting lives and property.
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