After to test the fusion machine with a 6 IPS pipe, the rsult is ok, the fusion is perfect. The pressure of welding is so fine, the mill equipment is very strong. The temperature control is very stable, in this test we use a set point of temperaure of 210ºC and the equipment have a stability of 3ºC like say in the manual.
Surtigas has a ISO 9001 procedure the only comment is how to verify or calibrate the temperature. Then we need that you send me the user manual of the temperature control to check how is the calibration procedure.