When choosing steel pipes for industrial, construction, or piping projects, two common options are API Pipes (Schedule Pipes) and Black Steel Pipes. Although they may look similar, they are designed for different purposes and performance levels.

Understanding the difference helps you select the right pipe for safety, durability, and cost efficiency.
 

What Are API Pipes Schedule Pipes ?

API pipes are manufactured according to API 5L standards and are mainly used for high-pressure and pipeline applications such as oil, gas, and water transmission.
The word Schedule (SCH) refers to pipe wall thickness, such as SCH 20, SCH 40, and SCH 80. Thicker schedules provide higher pressure resistance.

API pipes are available in:

• Seamless pipes (no welding joint)
• Welded pipes (ERW or SAW)

These pipes offer high strength, controlled quality, and long service life.   
 

What Are Black Steel Pipes ?

Black steel pipes are carbon steel pipes without any galvanised coating. They are widely used for general construction, structural works, fire piping, and low-pressure systems.
Most black steel pipes are produced using welding methods (ERW), making them more economical and suitable for everyday industrial use.
Seamless black pipes are available but usually used only when higher pressure is required.
 

Quick Comparison Between API Pipes VS Black Pipes 

Which Pipes Have Welding?

✔ API Pipes – Available in both welded and seamless types
✔ Black Steel Pipes – Mostly welded (seamless only when specified)
 

Which Pipe Should You Choose?

Choose API Schedule Pipes if your project involves:

• High pressure systems

• Oil & gas pipelines

• Water transmission lines

Choose Black Steel Pipes if your project involves:

• Structural fabrication

• Fire protection piping

• General industrial applications
   

Need Help Choosing the Right Steel Pipe?

Our team provides professional guidance and quality steel pipe supply in Klang and Selangor. Contact us today for technical support and competitive pricing.