Steps for Post weld heat treatment services

For PWHT services at construction site/ premise, we need to following the bellow steps:

-       Document review:

+     Design drawing sheet

+     Materials specification

+     Applied standards

+     PWHT procedure/ PWHT thermal chart (temperature and time of heating, soaking time, temperature & time of cooling)

-       To generate the PWHT procedure

-       Prepare the materials and equipment for PWHT services.

-       Survey for construction site and object for PWHT services.

-       Preparing work for PWHT

-    Inspection on surface of weld/ object for PWHT – installation the flexible Ceramic Pads operating at 45V, 60V, 80V, 230 V.

-       Arrange for electrical sources and position of PWHT machine.

-       Installation of thermal sensors

-       Rechecking the available of equipment before supplying the power sources

-       Inspection and calibration for controlling parts – for generating of thermal chart

-       Prefix of time and thermal parameter need to control during PWHT process

-       Carrying out of supplying power sources and controlling the thermal of PWHT object  as per prefix thermal chart.

-       Monitoring and controlling of thermal at PWHT objectt

-       Checking and double check of thermal between thermal at auto recorder and infrared thermometer

-       End of PWHT process (take out the thermal chart, remove of thermal separator, PWHT machine)

-       Maintaining of site record

-       Prepare of PWHT report

-       Prepare of work completion sheet – take signature of client

To request for the Preheat and PWHT survices - Please contact ITVC Global - you'll get useful advice and the best service.