Fire Sci. Eng. Search

CLOSE


Fire Sci. Eng. > Volume 30(5); 2016 > Article
Fire Science and Engineering 2016;30(5):67-73.
DOI: https://doi.org/10.7731/KIFSE.2016.30.5.067    Published online October 31, 2016.
황동이음쇠형 금속플렉시블호스(CSST)의 저항 특성 및 소손 패턴 해석에 관한 연구
이장우, 최충석
1전주대학교 소방안전공학과
2전주대학교 소방안전공학과
A Study on the Analysis of the Resistance Characteristics and Damage Patterns of Brass Fittings Type CSST
Lee Jang-Woo, Choi Chung-Seog
1Dept. of Fire Safety Engineering, Jeonju Univ.
2Dept. of Fire Safety Engineering, Jeonju Univ.
요약
본 논문에서는 연소기에 사용되는 황동이음쇠형 CSST의 구조, 난연성 및 신뢰성 검증을 실시하였다. 황동이음쇠형 CSST는 보호 피막, 튜브, 너트, 클램프 링, 소켓, 볼 밸브 등으로 구성되어 있다. CSST의 적용 범위는 JIA가 4.2 kPa로 가장 높고, KS D 3625는 3.24 kPa이다. 정상 제품에 대한 신뢰 구간의 평균 저항은 $7.36m{Omega}$으로 해석되었다. 난연성 실험이 완료된 후 신뢰 구간의 평균 저항은 $6.67m{Omega}$이다. 정상 제품에 대한 AD는 1.584이며, 표준 편차는 0.3972로 해석되었다. 그리고 난연성 실험이 완료된 소손된 제품의 AD는 1.145이고, 표준 편차는 0.2467로 정상 제품에 비해 양호한 것으로 해석되었다. 또한 히스토그램 분석에서 정상 제품의 저항 평균은 $7.359m{Omega}$이고, 표준 편차는 0.3972이었다. 그리고 난연성 실험이 완료된 후의 히스토그램의 저항 평균은 $6.67m{Omega}$이며, 표준 편차는 0.2467이다.
Abstract
This paper examined the structure, fire resistance of brass fittings type CSST employed in gas appliances and the reliability verification. Brass fittings of type CSST consisted of cladding, tubing, nut, clamp ring, socket, and ball valve. The applicable JIA standard regulates the maximum working pressure to be 4.2 kPa, which is the highest pressure of the relevant standards and the KS D 3625 stipulates the maximum pressure to be 3.24 kPa. With a normal product, the average resistance within the confidence interval was found to be $7.36m{Omega}$. The average resistance within the confidence interval was $6.67m{Omega}$ after the fire resistance tests. The analysis indicated that the AD was 1.584 and the standard deviation was 0.3972 with respect of a normal product. Compared to the normal product, however, the damaged product after the fire resistance test showed better features, such as an AD of 1.145 and a standard deviation of 0.2467. Moreover, the average resistance of the normal product was $7.359m{Omega}$ and the standard deviation in histogram analysis was 0.3972. The average resistance of the damaged product after the fire resistance test in the histogram was $6.67m{Omega}$ and the standard deviation was 0.2467.
Key Words: Brass fittings type, CSST, Resistive properties, Damaged pattern, Mean resistance, AD, Standard deviation


ABOUT
BROWSE ARTICLES
EDITORIAL POLICY
AUTHOR INFORMATION
Editorial Office
Room 906, The Korea Science Technology Center The first building, 22, Teheran-ro 7 Gil, Gangnam-gu, Seoul, Republic of Korea
Tel: +82-2-555-2450/+82-2-555-2452    Fax: +82-2-3453-5855    E-mail: kifse@hanmail.net                

Copyright © 2024 by Korean Institute of Fire Science and Engineering.

Developed in M2PI

Close layer
prev next