비파괴 기술을 이용한 대구경 수도용 밸브의 상태평가에 관한 연구
(주)코리아스칼라
- 최초 등록일
- 2023.09.25
- 최종 저작일
- 2023.08
- 15페이지/ 어도비 PDF
- 가격 4,800원
* 본 문서는 배포용으로 복사 및 편집이 불가합니다.
서지정보
ㆍ발행기관 : 대한상하수도학회
ㆍ수록지정보 : 상하수도학회지 / 37권 / 4호
ㆍ저자명 : 이호민, 최현용, 박수완, 오태민, 김채민, 배철호
목차
1. 서 론
2. 연구방법
2.1 안전성 평가
2.2 차수기능 평가
2.3 현장적용 대상 구간
3. 연구결과
3.1 안전성 평가 결과
3.2 차수기능 평가 결과
3.3 현장 적용성 평가 결과
4. 결 론
영어 초록
In this study, non-destructive technologies that can be applied to evaluate the integrity of valve materials, safety against internal pressure caused by corrosion, and the blocking function of large-diameter water valves during operation without requiring specimen collection or manpower entering the inside of the valve were tested to assess the reliability of the technologies and their suitability for field application. The results showed that the condition of the graphite structure inside the valve body can be evaluated directly through the optical microscope in the field without specimen collection for large-diameter water butterfly valves, and the depth of corrosion inside the valve body can be determined by array ultrasound and the tensile strength can be measured by instrumented indentation test. The reliability of each of these non-destructive techniques is high, and they can be widely used to evaluate the condition of steel or cast iron pipes that are significantly smaller in thickness than valves. Evaluation of blocking function of the valves with mixed gas showed that it can be detected even when a very low flow rate of mixed gas passes through the disk along with the water flow. Finally, as a result of evaluating the field applicability of non-destructive technologies for three old butterfly valves installed in the US industrial water pipeline, it was found that it is possible to check the material and determine the suitability of large-diameter water valves without taking samples, and to determine the corrosion state and mechanical strength. In addition, it was possible to evaluate safety through the measurement results, and it is judged that the evaluation of the blocking function using mixed gas will help strengthen preventive response in the event of an accident.
참고 자료
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