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Hi, Does anyone know how many Div 2 pressure vessels and Div 1 pressure vessels have been built in recent times? What is the breakup in US/ Canada? On a related topic, is Div 2 code having difficulty gaining traction, and if so, why? Thanks in Advance!!

Thanks Compositepro.

chicopee - yes, this is a pressure vessel. But I don't know the name of the manufacturer, nor do I have the data sheet. Thanks, weldstan.

Thanks LittleInch. But that is all the data I have. DekDee - perhaps these separation tanks were all delivered at the same time for a project. Seems very unlikely that people will keep buying them knowing fully well of this problem. Thanks metengr.

Thanks gtaw. I have been told that most oil separation tanks (identical to the one shown in the picture and built by same fabricator) show the same defect. Don't know if the defects manifested soon after being put in the service. The picture is not mine; however I will find out if I can get...

Thanks EdStainless and r6155.

Thanks DVWE. Hydrogen cracking was my first thought too.. thanks for the Lincoln Electric article.

Hi Al, Can anyone take a look at the two pictures below and advise the cause for the fracture shown here. It is an oil separator tank made from SA 455 material. To my knowledge there are no temperature extremes and vibrations in service. Material is 0.25" thick; it is code vessel. Thanks...