Intercon Purging Instructions
Introduction
Provided below are general guidelines for the use of purging equipment during the pipe welding process. This information is provided as a courtesy to Intercon customers and is intended as a supplement Intercon Purging Products. If you are uncertain about any aspect of the use of this eqipment, please contact our sales staff for further clairification. Thank-you.
- Assemble purge unit, making sure all connections are properly fastened and tightened. All other purge units are pre-assembled. Attach purge hose.
- Push purge unit up into Pipe A, making sure the retrieval
cable and gas inlet is facing you.
- Fish purge hose and retrieval calbel through the next section of pipe (Pipe B), whether elbow or pipe spool.
- Align Pipes A and B.
- Pull purge unit forward into Pipe B approximately 3 to 5
inches so that the baffles are on either side of the weld zone.
- Proceed to purge, usually 2 to 4 minutes, using an oxygen
indicator to measure residual oxygen content preferably below
70 ppm, or the value set by quality control.
- Proceed to weld.
- After the weld is completed, maintain purge for an extra minute during the cool down phase so oxides do not form.
- Pull purge unit through the completed section, stopping just
short of the next section.
- If more sections are to be added, repeat steps 3 through 9 as necessary.
