Fire fighting pipe riser installation acceptance specification

1, applicable to civil and general industrial buildings indoor fire sprinkler system and fire hydrant system piping and equipment installation.

2, material requirements: fire sprinkler pipe should be selected according to the design requirements, generally using galvanized carbon steel pipe and fittings, pipe wall inside and outside the galvanized uniformity, no corrosion, no flying spikes, parts are not bias plus, square buckle, incomplete fillet, the angle is not allowed. Fire hydrant system pipe should be selected according to the design requirements, generally use carbon steel pipe or seamless steel pipe, pipe shall not have bending, corrosion, heavy skin and unevenness and other phenomena.

3, dry pipe installation: sprinkler pipe is generally required to use galvanized pipe fittings (dry pipe diameter of 100mm or more, no galvanized pipe fittings when the welded flange connection, after the test pressure marking removal of galvanized processing).

Pipes needing galvanized processing should be selected carbon steel pipe or seamless steel pipe, before galvanized processing is not allowed to brush the oil and contaminated pipes. Pipes that need to be disassembled and galvanized should be scheduled for construction first.

The fire fighting system should be commissioned to meet the fire department test conditions. Fire pumps should be connected to the power supply and have been test run, test the most unfavorable point of the sprinkler head and fire hydrant pressure and flow can meet the design requirements.

Expanded Information:

Technical points of fire piping connection:

1, fire hydrant water supply system piping when the internal and external walls of hot dipped galvanized steel pipe, should not be welded. System piping using internal wall not anti-corrosion pipe, can be welded connection, but pipe welding should meet the relevant requirements.

2, fire hydrant water supply system pipe diameter> 100mm galvanized steel pipe, should be connected by flange or groove. Automatic sprinkler system pipe diameter ﹥ 100mm did not specify the use of threaded connections, only required in the pipe diameter ≥ 100mm pipe section should be at a certain distance with a flange connection or groove connection point.

3, fire hydrant water supply system and automatic sprinkler system piping, when the flange connection is recommended to use the threaded flange, when the welded flange should be galvanized twice.

4, any pipe section needs to change the pipe diameter, should be used in accordance with the standard reducer pipe joints and fittings.

5, the fire pipe connection and related technical requirements can refer to the "national civil engineering design technical measures - water supply and drainage" in the relevant provisions.

Baidu Encyclopedia - fire piping