Introduction
Pipe is one of the most widely used structural components in civil, industrial, installation, and agricultural projects.
The main function of pipes is to transfer water, gas, oil, or other liquids with a specified pressure.
Choosing the right type of pipe has a direct effect on the durability of the system, safety, and final project cost.
In this article, we examine completely the types of pipes, their features, and applications.
Types of pipes by material
1. Steel pipe
Steel pipes, due to high strength and pressure tolerance, have wide application in oil, gas, and metal structure industries.
Advantages: High resistance, tolerance of high heat, weldability
Disadvantages: Possibility of rusting in contact with moisture
Applications: Gas lines, oil transfer, radiator and metal frameworks
Types of steel pipes:
Black pipe: Without coating, specific for gas supply
Galvanized pipe: With zinc coating to prevent corrosion
Stainless steel pipe: Anti-rust and resistant against chemical materials
2. Copper pipe
Copper pipes, due to high conductivity, are used in cooling, heating, and sanitary systems.
Advantages: Light weight, resistant to rust, long lifespan
Disadvantages: High price, soft against impact
Applications: Air conditioner, refrigerators, hot water systems
3. PVC pipe (Polyvinyl chloride)
PVC is one of the most popular types of plastic pipe used in sewage and urban piping.
Advantages: Light, cheap, resistant to corrosion
Disadvantages: Low resistance against high temperature
Applications: Urban sewage, rainwater transfer, ventilation
4. Polyethylene pipe (PE)
Polyethylene pipes, with high flexibility and chemical resistance, are very useful in water and gas systems.
Advantages: Anti-rust, pressure resistant, suitable for soil and humid environments
Types:
PE32: Suitable for irrigation
PE80 and PE100: For water and gas under high pressure
Applications: Water and gas networks, agriculture
5. Galvanized pipe
Galvanized pipe is made of steel coated with zinc and is resistant to rusting.
Advantages: High resistance to moisture, long life span
Disadvantages: Heavy weight, needs special fittings
Applications: Greenhouses, open water piping, ventilation installations
6. Cast iron pipe
These pipes were widely used in urban sewage in the past and are still used in some projects.
Advantages: High pressure tolerance, long life
Disadvantages: Heavy weight, difficult cutting and installation
Applications: Urban sewage, factories, and refineries
Types of pipes by manufacturing method
1. Welded pipe
In this type, the steel sheet is bent and the seam is welded.
Advantages: Low price, fast production
Disadvantages: Lower pressure tolerance compared to seamless
Application: Building piping, cold water transfer
2. Seamless pipe (Mannesmann)
This pipe is made from a solid steel billet without welding.
Advantages: Very high pressure tolerance, resistant to heat
Applications: Oil and gas industries, steam, petrochemical
Comparison table of types of pipes
| Type of pipe | Heat resistance | Corrosion | Weight | Price | Application |
|---|---|---|---|---|---|
| Steel | High | Medium | Heavy | Medium | Oil, gas, structures |
| Copper | High | High | Light | High | Cooling & heating |
| PVC | Low | High | Light | Low | Sewage & ventilation |
| Polyethylene | Medium | High | Light | Medium | Water & gas |
| Galvanized | Medium | High | Heavy | Medium | Outdoor installations |
| Cast iron | High | Medium | Heavy | Low | Traditional sewage |
Important points in choosing the pipe type
Environmental conditions: Temperature, humidity, and contact with chemicals affect the pipe choice.
System pressure: Every project must have a specific pipe according to its design pressure.
Maintenance cost: Polymer pipes usually have easier maintenance.
Safety and lifespan: In sensitive systems such as gas, seamless pipe is the best choice.
Conclusion
Knowing the features and applications of different pipes helps to make a smart and economical choice.
Steel pipes are best for industrial projects, PVC and polyethylene pipes for urban installations, and copper pipes for heating and cooling systems.
The correct pipe selection means more durability, lower cost, and higher system safety.
Frequently Asked Questions (FAQ) about types of pipes
1. What is the best type of pipe for building water piping?
Usually, polyethylene or PVC pressure pipes are used because they are light, rustproof, and pressure resistant.
2. What is the difference between seamless and welded pipes?
Seamless pipe is made without weld and can handle higher pressure, while welded pipe is made from welded sheet and is cheaper.
3. Is galvanized pipe suitable for drinking water?
No, because of the risk of rust and heavy metal release, using galvanized pipes for drinking water is not recommended today.
4. What is the lifespan of polyethylene pipes?
If properly installed and under suitable conditions, they last more than 50 years.
5. Are PVC pipes heat resistant?
No, PVC deforms above 60°C and is not suitable for hot systems.
