What is Purge control? When the pipe is a corrosion-resistant alloy (CRA) material, bevels and root quality take on further importance as the root and hot pass must be back-purged to prevent oxidation of the parent material. Often the root must be free of defects to ensure full in-service performance. To handle this stringent back-purge requirement, CRC-Evans® offers a fully automated purge control system with laser vision, called V-Purge, to control and monitor the purge chamber parameters.

V-Purge is part of CRC-Evans' Vision Welding System.