...Engineering assessments and risk assessments are related but distinctly different evaluations of a pipeline’s integrity and its mitigation programs. While risk assessments, typically conducted at corporate and system levels annually, provide an overall view of a pipeline’s integrity based...

...As all metal components (rebars and liner) are connected to a ground, there is an electrical conductivity among all these metal components. For this reason, when making the electrochemical measurements the reinforced mesh can interfere in the liner evaluation ( Figure 2b ). The interference can...

..., an approach is described to perform “ P ipeline P r otectiv e   C o a ting Eval u a tion ” ( PreCaution ). Table 1 Correlation between laboratory evaluations and field performance of pipeline coatings ⁴ Coating Physical and chemical stability Resistance to soil stress...

... coating system be removed and a new one be applied similar to the one described above. The objective of this work is to present the results of the inspection performed to the wire ropes of the GRUB, to evaluate the actual conditions of the tension on the cables and the installed coatings system, along...

... are compared with the performance of a well established conventional sour gas inhibitor. Corrosion inhibitors polyaspartic polysuccinimide environmentally friendly hydrogen sulphide sour service evaluation INTRODUCTION The work over of sour oil and gas production wells is generally caused by localized...

... and parking garages. All these protection systems have been utilized on numerous structures in many parts of the world. The present paper focuses on the above methods of corrosion protection with emphasis on the basic principles of application, test methods and criteria to evaluate their performance. Well...

...slow strain rate C-ring pitting testing evaluation UNS N08825 UNS N08028 corrosion resistant alloy nickel stress corrosion cracking oil patch application sour service INTRODUCTION CRA’s have historically been screened in the selection of OCTG applications by a required minimum PREN...

... presentation of results for immediate evaluation. The system uses straight beam ultrasonic sensors for general corrosion survey in the pipe material and a novel ToFD (“Time of Flight Diffraction”) technique for additional inspection of the circumferential weld area. offshore risers environment inspection...

... of alloy G-3 OCTG has no discernable effect on stress corrosion cracking resistance. Also, no effect of grain size on intergranular attack (IGA) susceptibility was observed in the Streicher Test, ASTM Standard Test Method G28A. slow strain rate intergranular attack testing evaluation grain size UNS...

... behavior under certain conditions. These properties are usually part of the manufacturer material specifications or laboratory coating evaluation. This paper intends to provide a laboratory evaluation of the most frequently used organic coatings applied on pipelines and how this data should be used...

... of 130 psia, where 13 Cr failed but where 13Cr-5Ni-2Mo gave acceptable results. It was concluded that pH and temperature of the environment work together and play an important role on the mechanism of failure. Slow strain rate testing corrosion resistant alloys stainless steels NACE T1F9 evaluation...

..., and of precision between testing laboratory. Abstract Slow strain rate (SSR) and C-ring stress corrosion cracking (SCC) tests have historically been used to screen alloys for sour gas environments. The relevance of these testing techniques in predicting actual field corrosion behavior was evaluated for age...

... been explained. Emphasis has been laid on the dependence of the inhibitor performance on the type of the test method used for its evaluation. corrosion inhibitors structure-activity mechanism evaluation application petroleum industry sour gas refining handling CORROSION INHIBITION IN REFINING...

...Additive A Mw 1000 Additive B Mw 2200 Additive C Mw 3500 Additive D Mw 7500 Abstract A homologous series of polycarboxylic acids of varying molecular weight have been evaluated in performance tests for their activity against sulphate and carbonate scales. Assessment...

... coatings. Their results also suggested that laboratory immersion testing by EIS can provide performance information relevant to field performance. At Chevron, we have used EIS primarily to evaluate the corrosion inhibitor performance, to study inhibitor filming characteristics and inhibitor film life...

... strontium sulphate jar test testing technique temperature brine composition pH buffers test duration efficiency evaluation INTRODUCTION Background The formation of adherent solid deposits in tubes and vessels can seriously affect the safety and economic performance of plant associated...

...Abstract To accurately evaluate the corrosion rate of rebars in concrete by electrochemical impedance techniques, much time is needed, even if any methods are used. Therefore, from a view point of engineering application of electrochemical impedance techniques, there is a strong need to develop...

... was examined. As the result, Rf, which is looked on as coating resistance obtained by A.C.impedance method, is considered to be the parameter which can evaluate coating delamination caused by underfilm corrosion. Based on this fact, a new monitoring instrument was developed, and then applied to inspection...