MS ERW Pipe IS Code

MS ERW Pipe (Mild Steel Electric Resistance Welded Pipe) has multiple IS Codes (Indian Standard Numbers) in the Indian standards system, depending on the application scenario.

Common IS Codes for MS ERW Pipes:

IS Code	Standard Name	Applicable Scenarios	Specification Range	Material Grade
IS 1239 (Part 1)	General Purpose Steel Pipes	Water, Gas, Air, and Steam Transportation	1/2″ - 6″ NB	A/B/C Class (Fe 330/Fe 410)
IS 3589	Large Diameter Water Supply Steel Pipes	Water Supply, Drainage, Sewage Treatment, and Fire Protection	6″ - 24″ NB (168.3-609.6mm)	Fe 330 / Fe 410 / Fe 450
IS 4270	Pipes for Water Wells Water	Well Casings and Deep Well Pump Pipes	≤ 200mm Diameter	Fe 410
IS 1161	Structural Pipes	Scaffolding, Steel Structures, and Utility Poles	1/2″ - 24″ NB	YST 210 / 240 / 310 / 350

Different standards are analyzed below:

1. IS 1239 (Part 1) - Most Common

IS 1239 is the most widely used MS ERW pipe standard in India, suitable for low-pressure fluid transportation. Its full name is IS 1239 (Part 1): Steel Tubes, Tubulars and Other Wrought Steel Fittings.

Specifications: 1/2″ NB (21.3mm) to 6″ NB (168.3mm)
Wall Thickness Classes: A Class (Light), B Class (Medium), C Class (Heavy)
Material Grades: Fe 330 (YST 330), Fe 410
Typical Applications: Water supply pipes, gas pipes, compressed air, fire branch pipes, steam
Corresponding International Standard: BS 1387 (British Standard)

2. IS 3589 - Standard for Large Diameter Water Pipes

When the pipe diameter exceeds 6 inches, IS 1239 is no longer applicable, and the IS 3589 standard must be adopted. Full name: IS 3589: Steel Pipes for Water and Sewage.

Specifications: 6″ NB (168.3mm) to 24″ NB (609.6mm)
Material Grades: Fe 330 (Yield ≥ 330 MPa), Fe 410 (Yield ≥ 410 MPa), Fe 450
Typical Applications: Main water supply networks, sewage treatment, fire main pipelines, industrial water pipelines
Connection Methods: Plain end, Bevel, Socket

3. IS 4270 - Standard for Water Well Pipes

The IS 4270 standard is specifically for casing of water wells and deep well pumps. Full name: IS 4270: Steel Tubes for Water Wells.

Specifications: Diameter ≤ 200mm
Material Grade: Fe 410
Typical Applications: Water well casing, deep well pump pipes, groundwater monitoring wells
Manufacturing Process: ERW (Electrical Resistance Welding)
End Treatment: Plain End
Surface Treatment: Bituminous Solution Coating

4. IS 1161 - Standard for Structural Tubes

IS 1161 standard applies to building structures and scaffolding applications. Full name: IS 1161: Steel Tubes for Structural Purposes.

Specifications: 1/2″ NB to 24″ NB
Material Grades: YST 210 / 240 / 310 / 350 (YST stands for Yield Strength)
Typical Applications: Scaffolding, structural columns, utility poles, machinery frames
Corresponding International Standards: BS 1139, BS 1775 (Scaffolding Pipes)

Key Requirements in the Standards:

According to relevant product information, MS ERW Pipes must meet the following requirements:

Raw Materials: Edge-trimmed hot-rolled low-carbon steel coils (compliant with IS 10748)
Manufacturing Process: High-frequency resistance welding (ERW)
Dimensional Control: Dimensional tolerances corrected by sizing section
End Treatment: Flat end / Bevel / Threaded with clamp
Hydraulic Pressure Test: Each pipe must pass a hydraulic pressure test
Non-destructive Testing: Eddy current/ultrasonic testing optional
Surface Treatment: Black paint / Hot-dip galvanizing (IS 10748) 4736) Marking Requirements: Manufacturer Name, Specifications, IS Mark, Year

Conclusion: 

MS ERW Pipe does not have a single IS Code; it encompasses multiple Indian national standards. IS 1239 is for small to medium diameter fluid transport (most common), IS 3589 is for large diameter water transport, IS 1161 is for structural applications, and IS 4270 is for well casing. When selecting a pipe, the appropriate standard must be chosen based on the pipe diameter, pressure, and intended use.

Read more: MS ERW Pipe Thickness and Weight Chart