The Remaining Life Prediction and Internal Inspection Interval Analysis for Large-Scale Crude Oil Storage Tank

2010 ◽  
Author(s):  
Jian Shuai ◽  
Kejiang Han
Keyword(s):  
Crude Oil ◽  
Storage Tank ◽  
Life Prediction ◽  
Large Scale ◽  
Extreme Value Distribution ◽  
Bottom Plate ◽  
Remaining Life ◽  
Oil Storage ◽  
Inspection Interval ◽  
Oil Storage Tank

As an important production facility, storage tank plays a more and more important role in the storage and transportation of crude oil and chemical product. The remaining life prediction of storage tank is to forecast the thinning trend of plate thickness, and forecast remaining life on the premise that remaining strength of storage tank meets the tank operation and safety requirements. Maximum corrosion depths of tank bottom plate obey the maximum extreme value distribution. Based on maximum extreme value distribution and statistics of corrosion data, the calculation formula of the remaining life prediction for large-scale crude oil storage tank was obtained by formula derivation. Compared with API STD 653 and EEMUA 159, the inspection interval specified by China standard SY/T 5921 is relatively conservative. The remaining life of a certain crude oil storage tank (tank A) in china is determined by the remaining life of tank bottom plate. The remaining life of tank A at the reliability of 0.99, 0.999 and 0.9999 are 25 years, 20 years and 17 years, respectively. For the acceptable failure probability of 1×10−4, the inspection interval of tank A can be extended from required 5–7 years specified by China standard SY/T 5921 to 17 years. The remaining life of crude oil storage tank predicted by the method proposed in this paper can be used as an important reference in the determination of inspection interval and tank’s maintenance.

scholarly journals Iron-Corroding Methanogen Isolated from a Crude-Oil Storage Tank

2010 ◽  
Vol 76 (6) ◽  
pp. 1783-1788 ◽  
Author(s):  
Taku Uchiyama ◽  
Kimio Ito ◽  
Koji Mori ◽  
Hirohito Tsurumaru ◽  
Shigeaki Harayama
Keyword(s):  
Crude Oil ◽  
Storage Tank ◽  
Enrichment Culture ◽  
Sole Source ◽  
Microbiologically Influenced Corrosion ◽  
Bottom Plate ◽  
Rrna Gene ◽  
Scanning Electron Micrographs ◽  
Oil Storage ◽  
Oil Storage Tank

ABSTRACT Microbiologically influenced corrosion of steel in anaerobic environments has been attributed to hydrogenotrophic microorganisms. A sludge sample collected from the bottom plate of a crude-oil storage tank was used to inoculate a medium containing iron (Fe0) granules, which was then incubated anaerobically at 37°C under an N2-CO2 atmosphere to enrich for microorganisms capable of using iron as the sole source of electrons. A methanogen, designated strain KA1, was isolated from the enrichment culture. An analysis of its 16S rRNA gene sequence revealed that strain KA1 is a Methanococcus maripaludis strain. Strain KA1 produced methane and oxidized iron much faster than did the type strain of M. maripaludis, strain JJT, which produced methane at a rate expected from the abiotic H2 production rate from iron. Scanning electron micrographs of iron coupons that had been immersed in either a KA1 culture, a JJT culture, or an aseptic medium showed that only coupons from the KA1 culture had corroded substantially, and these were covered with crystalline deposits that consisted mainly of FeCO3.

Treating crude oil storage tank sludge by catalytic process and recovering valuable hydrocarbons

2021 ◽  
Author(s):  
Kamalesh Gupta ◽  
Arun Kumar Jana ◽  
Mousumi Chakraborty ◽  
Parimal A. Parikh
Keyword(s):  
Crude Oil ◽  
Storage Tank ◽  
Catalytic Process ◽  
Oil Storage ◽  
Oil Storage Tank

The time-to-failure assessment of large crude oil storage tank exposed to pool fire

2020 ◽  
Vol 117 ◽  
pp. 103192 ◽  
Author(s):  
Zhuang Wu ◽  
Lei Hou ◽  
Shouzhi Wu ◽  
Xingguang Wu ◽  
Fangyuan Liu
Keyword(s):  
Crude Oil ◽  
Storage Tank ◽  
Pool Fire ◽  
Time To Failure ◽  
Oil Storage ◽  
Failure Assessment ◽  
Oil Storage Tank
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