How to review wps part 2 (mau company)

1. WPS Understanding
By: Eng. Mohamed Farouk Bayomi
JANUARY 1, 2018
MAU FOR INSPECTIONS AND AUDITS
Cairo, Egypt. 002 01114521720
Mohamedfarouk86@gmail.com

2. 1 | P a g e M o h a m e d F a r o u k ( ( C W I / A P I 5 7 0 / A S N T L e v e l I I ) )
WPS Understanding – Part 2
Introduction
This topic just to introduce How to read, understand & use a WPS (welding procedure
specification).
We will continue for remain variable:
Example WPS for refer:

3. 2 | P a g e M o h a m e d F a r o u k ( ( C W I / A P I 5 7 0 / A S N T L e v e l I I ) )
I. Filler metals: for user purpose – just follow & take correct welding consumable,
filler metal. We need take note the below table to know what variable is essential (any
difference if it is essential, will not allow).

4. 3 | P a g e M o h a m e d F a r o u k ( ( C W I / A P I 5 7 0 / A S N T L e v e l I I ) )

5. 4 | P a g e M o h a m e d F a r o u k ( ( C W I / A P I 5 7 0 / A S N T L e v e l I I ) )

6. 5 | P a g e M o h a m e d F a r o u k ( ( C W I / A P I 5 7 0 / A S N T L e v e l I I ) )

7. 6 | P a g e M o h a m e d F a r o u k ( ( C W I / A P I 5 7 0 / A S N T L e v e l I I ) )
J. Position:

8. 7 | P a g e M o h a m e d F a r o u k ( ( C W I / A P I 5 7 0 / A S N T L e v e l I I ) )
K. Post weld heat treatment

9. 8 | P a g e M o h a m e d F a r o u k ( ( C W I / A P I 5 7 0 / A S N T L e v e l I I ) )
L. Preheat:
M. Gas:
▪ “Trailing” is generally given to the term where a trailing shield is used when using
the GTAW process and most likely used for the welding of titanium, the trailing
shield contains the shielding gas over the completed weld bead for a longer period
of time than it would otherwise be shielded by the torch cup and allows the weld
bead to cool below it’s critical temperature before subjecting it to atmospheric
exposure.
▪ “Backing” gas is the term to describe the application of a shielding gas to protect
the other side of a welded joint while welding is taking place on the front side of the
same joint, generally used when welding open-root pipe joints, but not always, and
applied to a variety of materials, titanium, monel, inconel, stainless steels, chrome-
moly, and a host of others, once again relative to the GTAW process and possibly a
few others.

10. 9 | P a g e M o h a m e d F a r o u k ( ( C W I / A P I 5 7 0 / A S N T L e v e l I I ) )
▪ “Shielding” gas would describe the application to a variety of processes where the
function of the gas is to protect the weld pool from atmospheric contamination
during the welding process and in many instances to aid in the heat transfer, more
so or less, and weld penetration characteristics and profile of the applied weld.
N. Electrical characteristic:
P. Technique: pls take care the note in WPS & Technique. It is importance to make
good welding seam.

11. 10 | P a g e M o h a m e d F a r o u k ( ( C W I / A P I 5 7 0 / A S N T L e v e l I I ) )