Selection Criteria for ERW Mill Specifications

Technical Considerations
Selecting appropriate ERW mill specifications requires evaluating multiple production factors and future requirements.

Production Range Analysis
Determine required capabilities:

• Diameter range: Minimum and maximum sizes

• Wall thickness: Thin-wall (<2mm) to heavy-wall (>8mm)

• Material grades: Carbon steel, alloys, or special materials

• Annual production volume: Shift patterns and utilization rates

Mill Configuration Options
Basic systems include:

• Uncoiler and entry equipment

• Forming section (8-24 stands)

• HF welding system

• Sizing and straightening units

• Cutting and handling systems

Advanced configurations add:

• Accumulator towers for continuous operation

• Online heat treatment systems

• Automated nondestructive testing

• Integrated finishing operations

Power Requirements
Welding generator sizing depends on:

• Maximum production speed

• Material thickness range

• Highest strength grade required
  Typical power ranges:

• 100 kW for thin-wall tubes

• 600 kW for heavy-wall pipes

• 1000+ kW for large diameter applications

Automation Level Selection
Choose control systems based on:

• Operator skill level

• Product change frequency

• Quality documentation needs

• Maintenance capabilities

Facility Requirements
Space considerations include:

• Mill length (typically 30-100 meters)

• Coil handling area

• Finished product storage

• Maintenance access ways

Utility needs encompass:

• Electrical power capacity

• Cooling water system

• Compressed air supply

• Ventilation requirements