location and identification for defect, grinding then welding build up according to repair procedure ,then flushing . *step by step fabrication and NDE activities.

1. Repair an old crack in
pressure vessel

2. • What is Crack?
A crack is a discontinuity in a solid body
which is characterized by possessing an
initiation (or nucleation) point and by
growing from this point to a finite size with
time, either leading, or not, to the division of
the initial body in two or more pieces".

3. 1.Cleaning with brush power tool ,visual
inspection and NDE to determine size and location
of crack.

4. 2.Marking for Drilling 5mm far from crack
tips to avoid crack propagation.

5. 3. Grind a “V” or “U” groove into the
cracking area to provide good weld
penetration.
V groove
Drill point

6. 4.Grinding cracking area "area of base metal
that including the crack" and apply NDE.
Dye Penetrate
Test

7. 5.Welding area with E7018 strings with rod
diameter 2.5 mm according to procedure
then apply visual and NDE.

8. 6.Flushing “Apply grinding to remove excess
welding reinforcement.”

9. 7. apply final visual and NDE inspection for
area.

10. The End
• Repair an old crack in pressure vessels
according to repair build up procedures.
• By/Mohamed Magdy
• MECH.ENG
• Certified Welding Inspector
• NDE LEVEL II (RT,UT,VT,MT,PT)