• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.28 no.3
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• pp.123-130
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• 2016

This study introduced deterioration evaluation item and criteria that could be applied to industrial facilities with the most widely used carbon steel pipe installed for ordinary piping (KSD 3507). Experimental industrial pipes were evaluated with pipe sectionalizing method combined with the established evaluation item and criteria to measure and manage semi-continuously for overall piping system. After applying outcomes from this study to a plant of incineration facility, a 42% saving in repairing and remodeling cost was achieved.

• 보일러설비
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• s.97
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• pp.105-109
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• 2002

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.27 no.2
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• pp.103-111
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• 2015

In general, no particularly well-established standards have been in place so far, for the method of evaluating the deteriorated level of pipes and ducts of industrial facilities. For that reason, the evaluation depends upon various studies which are based on the analysis of the residual life, thickness thinning, closure rate, and scale thickness that measure a few specific positions of pipes. It also depends upon the expertise in business operation and the specific techniques conducted by the inspection companies and institutions. This research introduces the concept of measuring units per section and the selection method of measurement points per section. Furthermore, specific methodologies were developed to plan and analyze deterioration level of industrial pipes and ducts by engineers and managers using a section map. Consequently, applying the outcomes from this study to the plant equipment of the incineration facility resulted in saving 42% of the repairing and remodeling cost.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.13 no.3
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• pp.1270-1274
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• 2012

The pipe laid underground more than three decades ago are already starting to reveal the problem like corrosion. There have been many studies to design robotic system for a cost-effective revival of old pipes. And the ability to inspect in the pipes, the ability to treat and repaint the pipes and the fault-tolerant robotic system are well known important factors for the robotic system. It's real hard part to manage the underground pipes for companies because it needs high technical and too much money. According to this reasons, in this paper, we had design an in-pipe robotic system having abilities to inspect outworn pipes, to treat and paint old pipes. This new robot system is pressing wall type robot, and it has a good carrying power for working.

• Journal of Convergence for Information Technology
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• v.9 no.5
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• pp.21-26
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• 2019

Various pipes are buried in the city as needed, such as water pipes, gas pipes and hydrogen pipes. As the time passes, buried pipes becomes aged due to crack, etc. these pipes has the risk of accidents such as explosion and leakage. To prevent the risks, many pipes are repaired or replaced, but the location of the pipes can also be changed. Failure to identify the location of the altered pipe may cause an accident by touching the pipe. In this paper, we propose a method to detect buried pipes by gathering the GPR images by using GPR and Learning with Faster R-CNN. Then experiments was carried out by raw data sets and data sets augmentation applied to increase the amount of images.

• 월간 기계설비
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• s.277
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• pp.48-55
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• 2013

국토교통부(장관 서승환)는 수직증축 리모델링 허용 등을 포함한 '공동주택 리모델링 제도개선 방안'(6.5 발표)의 후속조치로 노후 공동주택 거주 주민이 부담 가능한 범위에서 불편사례를 선택적으로 개선할 수 있도록 '맞춤형 리모델링' 활성화를 위한 연구용역을 마무리하고, 조만간 가이드라인을 제작 발표할 계획이라고 밝혔다. 가이드라인에는 주차장 부족, 배관 노후화 등 노후 공동주택 거주 주민들의 주요 불편사항(급 배수관 노후화, 주차장 부족, 난방효율 저하, 승강기 부족 등)을 효과적으로 해소할 수 있도록 단지 동 세대 내에서 각각 시행할 수 있는 총 39가지의 리모델링 아이템에 대한 소개와 공사비 등의 정보가 포함될 예정이다. 먼저, 단지내 리모델링에는 데크 지하주차장 신설, 녹지 보육시설 및 헬스장 등 확충, 노후상가 철거 후 별동 증축 등이 포함되며, 아파트 개별 동 내에서는 급 배수관/전기 통신/소방 등 노후 설비 교체, 승강기 신설, 코어증축(복도${\rightarrow}$계단식 변경) 등이, 세대 내에는 문 창호 및 내장재 교체, 단열 기밀 등 에너지 성능 향상, 실내공간 재배치 등이 포함된다. 특히, 아이템별 이주기간을 재실형과 이주형으로 구분하여 주민 선택의 폭을 한층 더 넓힐 것으로 기대된다.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.8 no.3
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• pp.571-578
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• 2018

The deteriorated pipline often causes the unexpected leakage and crack. Negligence and late maintenance leads the enormous damage for gas and water resource. This paper proposes early fault detection and diagnosis algorithm for pipeline using acoustic emission (AE) signals. Early fault detection method for pipeline compares the frequency amplitude of the spectrum to that of the spectrum in normal condition. Larger amplitude of the spectrum indicates abnormal condition. Early fault diagnosis algorithm uses support vector machines (SVM), which is trained for normal and abnormal conditions to diagnose the measured AE signal from the target pipeline. In the experiment, a pipeline testbed is constructed similarly to real industrial pipeline. Normal, 5mm cracked, 10mm holed pipelines are installed and tested in this study. The proposed fault detection and diagnosis technique is validated as an efficient approach to detect early faulty condition of pipeline.

• Journal of the Korean Institute of Gas
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• v.21 no.6
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• pp.30-38
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• 2017

Established in the 1960s, high pressure underground pipelines in Ulsan and Yeosu industrial estate are underground as toxic gas as well as combustible gas that is heavier than city gas and low combustion range. Especially, industrial pipelines occupy more than 20 years old pipes. In this way, the industrial estate pipeline was installed before the introduction of the supervision of construction, However, unlike the city gas pipeline, the pipeline is managed without any legal obligation. In this study, the safety management status of high pressure underground pipelines and urban gas underground pipelines in the industrial estate is analyzed and comparison of laws, extent of damage impact, using the pipe inspection model for pipe inspection of high pressure piping system with the existing piping system. it is intended to cuntribute to improving the safety of industrial estate are underground pipeline.

• Proceedings of the Korean Institute of Surface Engineering Conference
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• 1998.05a
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• pp.4-4
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• 1998

서울 및 서울 인근 주민들의 식수 공급을 위하여 1978년에 건설된 매설 상수배관은 전기방식 조처없이 콜탈에나벨만으로 피복된채 지하철 및 각종 전기설비가 복잡하게 산재된 서울지역에서 근 20년 유지되고 있다. 따라서 이 배관에 대한 부식 상태를 파악하는 것이 배관의 안전성 확보 및 대책수립, 배관수명의 연장, 중단없는 상수공급 동의 차원에서 매우 중요하다. 이 조사의 목적은 건설후 20년이 경과하여 노후된 매설 상수배관에 대한 기본적인 부식환경 및 피복 상태를 조사하여, 부식상태를 진단하고 향후 대책을 세우기 위한 기초 자료를 확보하는 것이다. 조사의 대상은 1978년에 건설된 서울지역 매설 상수배관 103 Km이었으며, 주요 조사 내용은 토양의 pH, 토양비저항과 같은 기초적인 부식환경조사, 전 배관에 대한 부식전위측정, 부식환경 조사로부터 판정된 부식 우려구간을 대상으로 피복손상부 탐측 및 시험굴착, 그리고 상기 조사의 결과를 검토하는 것이다. 조사 결과, 기본적인 부식환경 변수로 예상되던 토양의 전기비저항, 습도, pH는 부 식전위 및 토양종류와 상관관계를 보이지 않았으며, 상수배관 주변의 토양비저항은 대부분 8,000 ~ 10,000 ${\Omega}{\cdot}cm$, 토양 pH는 대부분 5와 6사이에 집중되었다. 전체적으로 볼 때 매설 상수배관은 예상보다 양호한 배관 상태를 유지하고 있다고 판단되나, 일부 간섭구간은 방식보완이 필요한 것으로 조사되었다. 즉 일부 간섭에 의한 미방식 지역은 배류기나 희생양극 설치와 같은 조속한 방식보완 조치가 필요하며, 과방식이 우려되는 곳은 강제배류기의 출력을 크게 낮추는 것이 필요하다. 이때 부식전위가 크게 올라가는 지점이 있으면 부근 가까운 지하철 레일과 선택배류기로 연결하는 것이 바람직하다.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2016.10a
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• pp.162-162
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• 2016