Khodal Enterprise

1. Scope

This specification covers the supply, manufacture, testing, and delivery of Mild Steel Electric Resistance Welded (ERW) Pipes for structural, mechanical, and general engineering applications.

2. Manufacturing Process

• Pipes shall be manufactured from hot rolled steel strips.

• Formed by Electric Resistance Welding (ERW) without the use of filler metal.

• Weld seam shall be heat treated and normalized to ensure uniform mechanical properties.

• Pipes shall be straight, smooth, and free from harmful defects.

3. Applicable Standards

Pipes shall conform to one or more of the following standards (as specified in the order):

• IS 1239 (Part 1 & 2)

• IS 3589

• ASTM A53 Grade A / B

• ASTM A500

• BS EN 10255

• BS 1387

4. Material Grade

• Mild Steel conforming to:

  • IS: E155 / E165 / E250

  • ASTM A53 Gr. A / B

• Steel shall be fully killed or semi-killed.

5. Size Range

• Outside Diameter (OD): 15 mm to 610 mm

• Thickness: 1.2 mm to 12.0 mm

• Length:

  • Random length: 4 – 7 m

  • Fixed length: As specified (±10 mm tolerance)

6. Chemical Composition (Typical – Max %)

• Carbon (C): 0.25%

• Manganese (Mn): 1.30%

• Sulphur (S): 0.05%

• Phosphorus (P): 0.05%

7. Mechanical Properties

• Tensile Strength: 320 – 460 MPa

• Yield Strength: Minimum 205 MPa

• Elongation: Minimum 20%

8. Tolerances

• OD: ±1%

• Wall Thickness: ±10%

• Straightness: Max 1/1000 of length

9. Testing

• Hydrostatic or Eddy Current Test

• Flattening Test

• Bend Test

• Visual and Dimensional Inspection

• Chemical and Mechanical Tests (as per standard)

10. Surface Finish

• Black (as rolled)

• Galvanized (optional, as specified)

• Surface shall be free from cracks, laminations, and excessive rust.

11. Marking

Each pipe shall be marked with:

• Manufacturer’s name

• Standard & Grade

• Size

• Heat/Batch number

12. Application

• Water and gas pipelines

• Structural fabrication

• Scaffolding

• Mechanical and engineering works

1. Product Description

Electric Resistance Welded (ERW) Pipes are manufactured from high-quality Mild Steel strips, formed into tubular shape and welded longitudinally using high-frequency electric resistance welding. These pipes are widely used for structural, mechanical, water, gas, and general engineering applications.

2. Manufacturing Process

• Cold forming of MS steel strip

• High Frequency Electric Resistance Welding (HFW/ERW)

• Online weld seam heat treatment

• Straightening, sizing, and cutting to length

• Hydrostatic / Eddy Current Testing (as required)

3. Applicable Standards

• IS 1239 (Part 1 & 2)

• IS 3589

• IS 4923

• ASTM A53 Grade A / B

• ASTM A500

• BS 1387 (as applicable)

4. Material Grade

• Mild Steel (Low Carbon Steel)

• Carbon Content: Max 0.25%

• Other elements as per applicable standard

5. Size Range 6. Mechanical Properties

(Values may vary as per standard & grade)

7. Surface Finish

• Black (As Rolled)

• Oiled / Bare

• Galvanized (Optional)

• Painted / Coated (Optional)

8. Testing & Inspection

• Visual & Dimensional Inspection

• Hydrostatic Pressure Test

• Eddy Current / Ultrasonic Test

• Chemical & Mechanical Testing (on request)

9. End Finish

• Plain End

• Beveled End

• Threaded & Coupled (Optional)

10. Applications

• Water & Gas Pipelines

• Structural Fabrication

• Scaffolding

• Engineering & Mechanical Works

• Automotive & Furniture Industry

11. Packing

• Bundled with Steel Strips

• Plastic Caps on Ends (Optional)

• As per customer requirement

We are engaged in offering Round Galvanized ERW Steel Tube, 40 mm OD, 3.2 mm WT, IS 1239 to our clients. Our range of all products is widely appreciated by our clients.