Special requirements and specifications for steel pipes used in fire protection pipelines

With the acceleration of urbanization and the continuous increase of high-rise buildings,fire prevention and control has received more and more attention from all walks of life.As one of the core components of the fire protection system,the material selection and installation specifications of fire protection pipes are directly related to the safety performance of the entire building.Among many materials,steel pipes have become one of the preferred materials in fire protection pipe systems due to their excellent strength,pressure resistance and processing adaptability.However,the steel pipes used in fire protection pipes are not ordinary water pipes.They need to meet a series of strict technical requirements and national standards to ensure that they can be"pulled out and won"at critical moments.

This article will start from the composition of the fire protection piping system,analyze in detail the special requirements,manufacturing standards and testing specifications required for fire protection steel pipes,and discuss its important role in engineering practice in combination with application examples.

Basic requirements of fire protection system for steel pipes

1.High pressure bearing capacity

The working pressure of fire protection pipes is usually between 1.6MPa and 2.5MPa,and some high-rise buildings even require higher pressures.Therefore,steel pipes must have sufficient pressure resistance and safety redundancy factors to maintain a stable structure under the impact of high-pressure water flow.

2.Strong corrosion resistance

Firefighting pipes are in a humid,closed environment or even a corrosive gas environment for a long time.Ordinary steel pipes are prone to corrosion and perforation,leading to water leakage,pressure loss and other problems.Therefore,firefighting steel pipes usually need to undergo anti-corrosion treatment,such as coating the inside and outside with epoxy resin or using galvanizing.

3.High connection reliability

To ensure smooth water flow in an emergency,the connections of fire-fighting pipes must be firm and reliable,without leakage or falling off.Welding,groove connection,flange connection,etc.must meet the corresponding national construction specifications.

4.High temperature resistance and impact resistance

When a fire occurs,the ambient temperature rises rapidly,and the steel pipe must be able to maintain structural strength and connection stability at high temperatures.In addition,it may be impacted by external forces during the firefighting process,so the steel pipe is required to have a certain toughness and impact resistance.

Common types of fire-fighting steel pipes

1.Galvanized Steel Pipe

Features:Internal and external galvanized layer,with good anti-corrosion performance.

Application:Suitable for wet systems and sprinkler systems on ordinary floors.

Standard:Conform to GB/T 3091,GB/T 21835.

2.Seamless Steel Pipe

Features:no welds,high strength,strong pressure resistance,suitable for high pressure systems.

Application:Used for fire trunk pipelines in high-rise buildings and important facilities.

Standard:Refer to GB/T 8163.

3.Epoxy Coated Steel Pipe

Features:The inner wall is coated with epoxy powder,which has strong corrosion resistance and low friction coefficient.

Application:Replace galvanized pipe,widely used in dry system and corrosive environment.

Advantages:environmentally friendly,pollution-free and long service life.

Design specifications and standards for fire protection pipeline steel pipes

1.Code for Fire Protection Design of Buildings(GB50016)

2."Design Specifications for Automatic Sprinkler Fire Extinguishing Systems"(GB50084)

3.Technical Specifications for Fire Water Supply and Fire Hydrant Systems(GB50974)

4.Code for Design of Building Water Supply and Drainage(GB50015)

Key points of construction and installation

1.Pipe inspection

2.Reasonable stent design

3.Welding and connection process

4.System water pressure test

Common problems and countermeasures of fire-fighting steel pipes

1.Corrosion leakage

2.Pipeline falls off or shifts

3.Burst pipes

Future Development Trends

1.More environmentally friendly anti-corrosion materials

2.High-strength and lightweight steel

3.Intelligent detection and operation and maintenance

The fire protection piping system is an"invisible"safety guarantee project,and the steel pipes used in it are the"visible"skeleton of the entire system.Only by selecting steel pipe products that meet standards and have superior performance,combined with scientific and rigorous construction and maintenance,can we protect people's lives and property at critical moments.Faced with increasingly complex application scenarios and higher safety requirements,the manufacturing and use specifications of fire protection steel pipes will continue to improve and evolve.As industry practitioners,we should always adhere to the principles of quality first and safety first,and promote the continuous optimization and upgrading of steel pipe products in fire protection systems.