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http://dx.doi.org/10.7731/KIFSE.2016.30.4.121

A Study on the Properties Analysis of an Iron Fittings Type CSST Damaged by the PCITS  

Lee, Jang-Woo (Dept. of Fire Safety Engineering, Jeonju Univ.)
Choi, Chung-Seog (Dept. of Fire Safety Engineering, Jeonju Univ.)
Publication Information
Fire Science and Engineering / v.30, no.4, 2016 , pp. 121-127 More about this Journal
Abstract
This study analyzed the structural and electrical characteristics of an iron fittings type Corrugated Stainless Steel Tubing (CSST) damaged by the Primary Current Injection Test System (PCITS). CSST consists of cladding, tube, nuts, clamp ring, flare cap, socket, and ball valve. For an evaluation of the dielectric withstand voltage, the area between the live part and non-live part of the CCST shall withstand a voltage of 220 V AC for one minute. For an evaluation of the insulation performance by 500 V DC, it is required that the insulation exceed more than $1M{\Omega}$ before the temperature rise test, $0.3M{\Omega}$ after the test. Although the average resistance of the product was $11.5m{\Omega}$, that of the product damaged at a current of 130 A by the PCITS was $11.50m{\Omega}$. Furthermore, parts of the cladding were melted and black smoke appeared when a current of 130 A applied for 10 s. After 60 s, most parts were heated and turned red. At 120 s, the parts that turned red had widened. Although it did not form a normal distribution because the P value was 0.019 with a confidential interval of 95%, it revealed outstanding characteristics with an AD (Anderson-Darling) value of 0.896 and a standard deviation of 0.5573.
Keywords
PCITS; Iron fittings type; CSST; CI; Mean; P value; AD; Standard deviation;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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