IS 1239 Grade L (Light) Pipe
Economy Series Mild Steel Pipes for Low-Pressure and Lightweight Applications
IS 1239 Grade L (Light) is the entry-level series in the mild steel piping category, designed for cost-effective solutions in environments with minimal pressure requirements. Often referred to as "Class A" or "Yellow Band" pipes, they feature the thinnest wall thickness in the IS 1239 range. These pipes are exceptionally easy to handle and fabricate, making them the preferred choice for irrigation, simple domestic plumbing, and non-load-bearing architectural structures.
Technical Specifications
| Feature | Details |
|---|---|
| Standard | IS 1239 (Part 1) : 2004 |
| Grade / Series | Light (Class A / Yellow Band) |
| Nominal Bore (NB) | 15mm to 150mm (1/2" to 6") |
| Manufacturing Type | ERW (Electric Resistance Welded) |
| Coating Options | Black (Self-Finish) or Galvanized (GI) |
| Color Coding | Yellow Band (Identifies Light Grade) |
Mechanical Properties
| Property | IS 1239 Grade L Value |
|---|---|
| Tensile Strength (Min) | 320 MPa |
| Yield Strength (Min) | 210 MPa (YST 210) |
| Elongation (Min %) | 12% to 20% |
| Hydrostatic Test | Tested up to 5.0 MPa for leak-proof reliability |
Chemical Composition (%)
| Element | Percentage (Max) |
|---|---|
| Carbon (C) | 0.20% max |
| Manganese (Mn) | 1.30% max |
| Phosphorus (P) | 0.040% max |
| Sulphur (S) | 0.040% max |
Features and Benefits of IS 1239 Grade L Pipe
- Highly economical solution for low-pressure fluid transmission
- Lightweight construction reduces logistics and labor installation costs
- Smooth internal surface minimizes friction and scale buildup
- Easy to bend and weld, suitable for complex but low-stress layouts
- Available with GI coating for protection against atmospheric rust
- Consistent diameter and roundness for easy threading and coupling
Applications & Uses
Irrigation
Widely used in agriculture for water discharge and surface irrigation systems.
Domestic Plumbing
Ideal for low-pressure household water distribution and drainage.
Light Structural
Applied in temporary fencing, decorative railings, and light furniture frames.