IS 1239 M (Medium) Pipe
Standard Duty Mild Steel Pipes for General Engineering and Fluid Transport
IS 1239 M (Medium) is the most versatile and widely specified grade in the IS 1239 series. It is a mild steel pipe designed for the transport of water, gas, and air, as well as for various structural and mechanical applications. The "Medium" classification refers to its wall thickness, which provides a robust balance of durability and ease of installation. These pipes are available in both black (MS) and galvanized (GI) finishes to suit different environmental requirements.
Technical Specifications
| Feature | Details |
|---|---|
| Standard | IS 1239 (Part 1) : 2004 |
| Grade / Series | Medium (Class B / Blue Band) |
| Nominal Bore (NB) | 15mm to 150mm (1/2" to 6") |
| Type | ERW (Electric Resistance Welded) |
| Ends | Plain, Screwed & Socketed, Beveled |
| Color Coding | Blue Band (Identifies Medium Grade) |
Mechanical Properties
| Property | IS 1239 Grade M Value |
|---|---|
| Tensile Strength (Min) | 320 MPa |
| Yield Strength (Min) | 210 MPa (YST 210) |
| Elongation (Min %) | 12% to 20% (Based on diameter) |
| Hydrostatic Test Pressure | 5.0 MPa (Approx. 50 kg/cm²) |
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 M Pipe
- Optimum wall thickness providing high durability without excessive weight
- Excellent weldability and formability for plumbing and structural layouts
- Hot-dip galvanizing option for superior rust and atmospheric protection
- Cost-effective choice for municipal water distribution and irrigation
- High dimensional accuracy ensured through ERW manufacturing
- Suitable for both industrial fluid transport and architectural scaffolding
- Subjected to rigorous bend and flattening tests for quality assurance
Applications & Uses
Water Lines
Widely used for domestic plumbing and municipal water supply networks.
General Engineering
Applied in low-pressure industrial air, gas, and steam piping systems.
Structural
Ideal for handrails, fencing, scaffolding, and protective barriers.