Abstract
This paper presents different aspects of pressure vessel safety in the scope of industrial safety, focused to the chemical industry. Quality assurance, including application of PED97/23 has been analysed first, followed shortly by the risk assessment and in details by the structural integrity approach, which has been illustrated with three case studies. One important conclusion, following such an approach, is that so-called water proof testing can actually jeopardize integrity of a pressure vessel instead of proving it.
Highlights
This paper presents different aspects of pressure vessel safety in the scope of industrial safety, focused to the chemical industry
Leakage of large spherical tank, used for storage of ammonia, is briefly presented. It was caused by undetected micro-cracks in welded joint, which have grown through the thickness during proof testing [12]
The testing of storage tanks before and after inspection has clearly shown the adverse effect of proof test in service, since it has indicated large number of new cracks in the positions of the “old” ones
Summary
This paper presents different aspects of pressure vessel safety in the scope of industrial safety, focused to the chemical industry. Vessels are usually composed of a pressure-containing shell together with covers and flange rings, typically connected by welding. The first example concerns the storage tank for liquid carbon dioxide (CO2, produced of high strength micro-alloyed steel DIN St.E460, trade mark Nioval 47) (Steelworks, Jesenice), thickness 14 mm, with micro-cracks in ferrite-austenite welded joint, as shown in Fig. 1 [12,13]. Leakage of large spherical tank, used for storage of ammonia, is briefly presented. It was caused by undetected micro-cracks in welded joint, which have grown through the thickness during proof testing (cold-water test with pressure up to 50% above the operating pressure) [12].
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
