Challenges due to aging plants

Ramírez, Pedro A. Pérez; Utne, Ingrid Bouwer

doi:10.1002/prs.10453

Cited by 8 publications

(6 citation statements)

References 5 publications

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“…the position of the actual ultrasonic measurement followed an arc movement centred on the RSA centre of rotation. A 2D coordinate transform was utilised to calculate the point of ultrasonic measurement as shown in (2,3) where Ψ RSA equals the yaw angle (°) of the AUT RSA as measured by the VMCS, D TTC the distance (mm) from the transducer to AUT RSA turning centre and RSA TCx , RSA TCy represent the VMCS measured turning centre positions.…”

Section: A3 =3 Rd Back Wall Echo Amplitude (V) T3 =3 Rd Back Wall Ecmentioning

confidence: 99%

Machining-Based Coverage Path Planning for Automated Structural Inspection

MacLeod

Dobie

Pierce

et al. 2018

IEEE Trans. Automat. Sci. Eng.

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The automation of robotically delivered Non Destructive Evaluation (NDE) inspection shares many aims with traditional manufacture machining. This paper presents a new hardware and software system for automated thickness mapping of large-scale areas, with multiple obstacles, by employing CAD/CAM inspired path planning to implement control of a novel mobile robotic thickness mapping inspection vehicle. A custom post-processor provides the necessary translation from CAM Numeric Code through to robotic kinematic control to combine and automate the overall process. The generalised steps to implement this approach for any mobile robotic platform are presented herein and applied, in this instance, to a novel thickness mapping crawler. The inspection capabilities of the system were evaluated on an indoor mock-inspection scenario, within a motion tracking cell, to provide quantitative performance figures for positional accuracy. Multiple thickness defects simulating corrosion features on a steel sample plate were combined with obstacles to be avoided during the inspection. A minimum thickness mapping error of 0.21 mm and mean path error of 4.41 mm were observed for a 2 m 2 carbon steel sample of 10 mm nominal thickness. The potential of this automated approach has benefits in terms of repeatability of area coverage, obstacle avoidance and reduced path overlap, all of which directly lead to increased task efficiency and reduced inspection time of large structural assets. Note to Practitioners-Current industrial robotic inspection approaches largely consist of manual control of robotic platform motion to desired points, with the aim of producing an number of straight scans for larger areas, often spaced meters apart. Structures featuring large surface area and multiple obstacles, are routinely inspected with such manual approaches, which are both labour intensive, error prone and do not guarantee acquisition of full area coverage. The presented system addresses these limitations through a combined hardware and software approach. Core to the operation of the system is a fully wireless, differential drive crawler with integrated active ultrasonic wheel probe, to provide remote thickness mapping. Automation of path generation algorithms is produced using commercial CAD/CAM software algorithms, and this paper sets out an adaptable methodology for producing a custom post-processor to convert the exported G-Codes to suitable kinematic commands for mobile robotic

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Section: A3 =3 Rd Back Wall Echo Amplitude (V) T3 =3 Rd Back Wall Ecmentioning

confidence: 99%

Machining-Based Coverage Path Planning for Automated Structural Inspection

MacLeod

Dobie

Pierce

et al. 2018

IEEE Trans. Automat. Sci. Eng.

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“…Many oil and gas producing installations on the Norwegian Continental Shelf are entering the tail production phase [9]. General ageing of the installations will lead to increased amount of failures of heat exchangers [typical ageing mechanisms are corrosion, erosion, material fatigue, thermal fatigue, changes in production, more sand in the process fluids, and phase changes (oil, gas, and water)].…”

Section: Challenges With Monitoring the Mechanical Integrity Of Heat mentioning

confidence: 99%

“…This means that the need for process data and monitoring of MI should be considered all together when designing a system or a facility. By combining information from different disciplines, the total condition of the heat exchanger may be better described. It would be beneficial to investigate experiences from the nuclear and aviation industries and analyze the potential for transfer of knowledge to the processing industry. It is necessary to obtain good knowledge of the equipment history and keep updating it for use in decision making, in addition to transfer of operational experience back to design [9]. To achieve efficient monitoring of MI with reliable results, it is necessary with thorough planning, which depends on sufficient sharing of information between contractor (inspection personnel) and operator. Experience transfer between inspection personnel can be improved by letting beginners work with experienced personnel.…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

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Monitoring the mechanical integrity of heat exchangers

Utne

Brurok

Larsen

2011

Process Safety Progress

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Monitoring the mechanical integrity (MI) of offshore oil and gas facilities is important. It enables early fault detection of emerging failure conditions and allows more time for planning and preparing remedial actions, which reduces revenue losses resulting from unnecessary and poorly coordinated maintenance actions. Static equipment, such as heat exchangers, constitutes crucial parts of offshore processing facilities. Heat exchangers are challenging to maintain, especially in ageing facilities, and major maintenance problems are the result of (a) poor designs, (b) poor utilization of process information, (c) poor interpretation of results, and (d) poor development and management of high‐quality maintenance and MI programs. This article addresses the most important technological, human and organizational challenges concerning monitoring of MI of shell and tube heat exchangers, and discusses recommendations for future improvements. A good MI program benefits the operation and maintenance of heat exchangers, and will lead to improved safety and reduced costs. © 2011 American Institute of Chemical Engineers Process Saf Prog, 2011

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“…ith a concerted and growing emphasis on human safety [1] and the environment [2], greater information is required on the current state and condition of the world infrastructure. Higher operational demands such as greater working loads and longer working lifetimes [3], coupled to reduced capital investment in replacement designs has exerted greater strain and stress on numerous components, critically affecting their condition and safe working lifetime [4] .…”

Section: Introductionmentioning

confidence: 99%