4. Cooling Following calibration, the pipes must be cooled uniformly to solidify the plastic. Cooling can be achieved through water baths or air cooling systems. Proper cooling is crucial to prevent warping and ensure the pipes meet the required strength specifications.
The welding phase is perhaps the most important part of the production line
. There are several welding techniques employed, with the most common being high-frequency electric resistance welding (ERW) and submerged arc welding (SAW).