crack in main plate with thinness 19 mm

[babak khadivar]

Dear All

We have encountered a critical issue with the joints from the beam to the main plate on the Spud Can top plate of our jack-up rig. Upon welding and subsequently lowering the spud can into the water using the jacking system, cracks have emerged in three of the joints that were welded previously ( according to photos cracks happen on the plate) This is a concerning development, and we must address it promptly to ensure the integrity and safety of our spud can.

Considering that in the area where we are, the depth of water is low and there is not much pressure on the spud can, the reason why this happens is not clear to us, and if anyone can advise on this matter, I would be very grateful.

Main top plate thickness is 19 mm and crack depth is 16 mm.

Regards

Babak

[Ramamoorthi Thangarasu]

Hi 

This same problem we have solved in my previous Project .  It's called Hydrogen induced Crack or Delayed Crack. The main reason WPS was not followed (Preheating and post heat ) .   Also need to check two times for NDT 24 hours and 48 hours.   

Regards

Ramamoorthi Thangarasu

Sr.Inspection Engineer

TUV Rheinland.

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[Manoj Singh]

Please check for CEV value as we have also experienced the same type of crack and we found CEV was higher than max required.

Regards

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[Vinay]

Dear ;

Can you please provide more details ... MOC ?? ,Welding process ?? Preheat /Post heat??

[Venkatesh Mech]

Hello sir, 

We are also faced similar issue. Now is it possible to rework the part.

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[CHITTARANJAN BHIWANDKAR]

Are these cracks on plates near the leg joint.

Where "D" class plates are used.

[Mostafa DAIF]

Dear all,

What is the material specification of the plate?

Best Regards,

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Mostafa DAIF Chef preparateur T : 05 23 38 90 72 M : 06 61 54 12 95 TAQA MOROCCO PB 99 Sidi Bouzid - El Jadida 24 000 - Maroc taqamorocco.ma

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