1. Material Standards & Grades

Primary Standards:

• ASTM A134 - EFW Pipe (Size NPS 16 and Over)

• ASTM A139 - EFW Pipe (Size NPS 4 and Over)

• ASTM A671 - EFW Pipe for Atmospheric and Lower Temperatures

• ASTM A672 - EFW Pipe for High-Pressure Service

Common Carbon Steel Grades:

2. Chemical Composition (% by weight)

3. Mechanical Properties

4. Physical Properties

5. Product Specifications

6. Manufacturing Process

Production Steps:

• Plate rolling and forming

• Automatic electric fusion welding

• Weld seam heat treatment

• Sizing and straightening

• Non-destructive testing

• Final inspection

Welding Process:

• Automatic submerged arc welding (SAW)

• Single or double seam welding

• 100% weld penetration

• Weld reinforcement: 0-3mm

7. Heat Treatment

8. Testing & Inspection

Mandatory Tests:

• Hydrostatic test

• Non-destructive testing (RT/UT)

• Visual inspection

• Dimensional inspection

• Mechanical properties test

Optional Tests:

• Charpy V-notch impact test

• Hardness test

• Bend test

• Macro examination

• PMI verification

9. Applications

Industrial Applications:

• Water Transmission: Municipal water supply systems

• Oil & Gas: Pipeline systems, gathering lines

• Power Generation: Condenser tubes, penstocks

• Chemical Plants: Process piping

• Structural Applications: Building columns, supports

• Mining: Slurry transportation

Service Conditions:

• Maximum temperature: 425°C

• Pressure rating: As per design code

• Corrosion allowance: As per service requirements

Quality Assurance:

• ISO 9001 Quality Management System

• API Monogram (if applicable)

• Third-party inspection available

• Complete traceability

• Mill test certificates per EN 10204

Technical Advantages:

• Cost-effective for large diameters

• Consistent wall thickness

• Excellent dimensional accuracy

• Good weldability and formability

• Reliable performance in various applications

All EFW pipes are manufactured and tested in accordance with relevant international standards and can be customized to meet specific project requirements.