Choosing a Welding Procedure

Pendulum Welding (PW) 

• Slowest welding technique
• Best for very confined spaces
• Best for short seams and repair work
• For plastic as thick as 5-10 mm

• The operator must ensure the following:
  • Even heating of both plastic and welding rod
  • Vertical orientation of welding rod
  • Sufficient welding force

Speed Welding (SW) 

• A.K.A. Draw Welding
• Faster than PW
• Allows welding in tight spaces
• Not suitable for PVC-U welding
• For plastic as thick as 10 mm
• Advantages over pendulum welding:
  • Higher welding speed
  • Thicker materials with larger gaps can be welded

Extrusion Welding (EW) 

• Faster than SW
• More space needed due to tool size
• Better seam quality
• For plastic as thick as 40 mm