Welded joints as critical regions in pressure vessels – case study of vinyl-chloride monomer storage tank
Article Sidebar
Main Article Content
Abstract
Welded joints are analysed as critical regions in a pressure vessel in respect to structural failure due to the elastic-plastic fracture/crack growth. To assess structural integrity of pressure vessels used in chemical industry the risk based procedure has been introduced and applied in the case of a large spherical pressure vessel used as a vinyl-chloride monomer (VCM) storage tank in HIP Azotara Pančevo. The risk matrix has been used, taking into account the basic definition of risk, being the product of the probability and consequence, and applied to different regions of welded joints, having different mechanical properties, i.e. crack resistance. To estimate probability, the failure assessment diagram (FAD) has been used, as an engineering tool, defined according to the position of the operating point for different regions of the welded joint, relative to the critical point on the limit curve. Generally speaking, consequence is estimated based on pressure vessel parameters, or by detailed analysis of health, safety, business and security issues, but in the analysed case, the worst case scenario is assumed, with the highest consequence due to potential disaster for environment and fatalities.
Article Details
Authors retain copyright and grant the journal right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgement of the work's authorship and initial publication in this journal.
Authors grant to the Publisher the following rights to the manuscript, including any supplemental material, and any parts, extracts or elements thereof:
- the right to reproduce and distribute the Manuscript in printed form, including print-on-demand;
- the right to produce prepublications, reprints, and special editions of the Manuscript;
- the right to translate the Manuscript into other languages;
- the right to reproduce the Manuscript using photomechanical or similar means including, but not limited to photocopy, and the right to distribute these reproductions;
- the right to reproduce and distribute the Manuscript electronically or optically on any and all data carriers or storage media – especially in machine readable/digitalized form on data carriers such as hard drive, CD-Rom, DVD, Blu-ray Disc (BD), Mini-Disk, data tape – and the right to reproduce and distribute the Article via these data carriers;
- the right to store the Manuscript in databases, including online databases, and the right of transmission of the Manuscript in all technical systems and modes;
- the right to make the Manuscript available to the public or to closed user groups on individual demand, for use on monitors or other readers (including e-books), and in printable form for the user, either via the internet, other online services, or via internal or external networks.
How to Cite
References
Algool M, Sedmak A, Kirin S, Rakičević B, Bakić R. Industrial safety of pressure vessels - structural integrity and risk assessment point of view, Hem. Ind. 2016;70: 685-694
Bakić R, Milović Lj, Jovičić R, Sedmak SA. Quality assurance of storage tanks after in-service crack repairs, Structural Integrity and Life. 2013; 13: 63–74
Sedmak A, Kirin S, Golubovic T, Mitrovic S, Stanojevic P. Risk based approach to integrity assessment of a large spherical pressure vessel, ECF21, Catania, Italy, 2016, Structural Integrity Procedia, Vol. 2, 3654-3659
Kirin S, Martic I, Sedmak A, Alkateb M, Stanojevic P. Structural integrity assessment of a cylindrical pressure vessel by using the risk based approach, Int. Conf. Struct. Int. and Durability. Dubrovnik, Croatia, 2017, p. 241-242.
Đorđević P, Kirin S, Sedmak A, Džindo E. Risk analysis in Structural Integrity. Structural Integrity and Life. 2011; 11: 135-138.
Golubovic T, Sedmak A, Spasojević Brkić V, Kirin S, Rakonjac I. Novel Risk Based Assessment of Pressure Vessel Integrity, accepted for publication in Technical Gazette. 2018
ISO 31000: Risk management – risk assessment techniques. 2009
API 581: The standard for quantitative Risk Based Ins¬pec¬tion, American Petroleum Institute. 2010
Stanojević P, Jovanović A, Kirin S, Misita M, Orlić B, Eremić S. Some Achievements in RBIM Implementation According to RIMAP Approach, Structural Integrity and Life. 2015; 15: 79–84
Martić, I, Sedmak A, Tomić R, Hot I. Remaining Life Determination for Pressure Vessel in a Refinery, Structural Integrity and Life. 2016; 16: 49–62
Anderson T. Fracture Mechanics – Fundamental and Applications, 3rd Edition, CRC Press, 2003
Sedmak A, Sedmak S, Milovic Lj. Pressure equipment integrity assessment by elastic-plastic fracture mechanics methods, DIVK, Belgrade, 2011
Sedmak A, Berkovic M, Savovic N. Numerička analiza problema površinskih prslina u posudama pod pritiskom, Ekspolatacijske prsline u posudama pod pritiskom i rezervoarima (ured. Sedmak S, Sedmak A), TMF-ECPD-GOSA, 1994, 211-227