We will be welding on a CS sulfur tank. Is there anything special needed for the repair plan?

[jeevesme]

Hey guys,

I am creating a repair plan to replace an:
-Built 2005
-API 650 Manway Flange
-1/4" Thick
-A106 Carbon Steel
-Sulfur service
-@ ~350F

Is there anything I need to watch out for in terms of the Sulfur Service?

Thanks in advance!

 

[metengr]

Make sure the tank has been drained completely and neutralized of acid and acid residue before welding. Follow API 650 guidelines for repair.

 

[NBrink]

Cleanliness is paramount in welding on things that have been in elemental sulfur service. Just a tiny amount of sulfur makes its way into that weld and you'll hot crack as fast as you can lay down a bead.

Have had good luck with blasting followed by washing with muriatic acid and finally water. Your mileage may vary.

Nathan Brink

 

[blacksmith37]

Concentrate on mechanical cleaning ,grinding and blasting so no original surface is in the weld. Per Nathan , any S will ruin the weld.

 

[jeevesme]

Thank you for the input guys! Much appreciated.

 

[Ron]

Further....if welding inside the tank, make sure you have plenty of fresh air blowing in for the welder, so consider that need when selecting a welding process....not greatly compatible in confined spaces for GMAW or GTAW because of gas interruption. Use SMAW if possible or protect the shielding gas.