KS C IEC 60079-10-1 규격의 무시할 수 있는 정도와 누출특성에 관한 연구

• Published in: 한국안전학회지 Vol. 35; no. 2; pp. 111 - 117
• Main Authors: 조필래, Pil-rae Cho, 이향직, Hyang-jig Lee, 백종배, Jong Bae Baek
• Format: Journal Article
• Language: Korean
• Published: 한국안전학회 30.04.2020
• Subjects: hazardous area classification; IEC 60079-10-1; KSC IEC 60079-10-1; low pressure; negligible extent; release characteristic; RR630; 안전공학; negligible extent; KSC IEC 60079-10-1; IEC 60079-10-1; RR630; low pressure; hazardous area classification; release characteristic
• ISSN: 1738-3803; 2383-9953
• DOI: 10.14346/JKOSOS.2020.35.2.111

When KS C IEC 60069-10-1(2015) standard is applied to estimate a hazardous area, the chart showing the relationship between a hazardous area distance and release characteristic is used as a guide to determine the extent of hazardous zones for various forms of release. Three release characteristic lines based on the three types of release as an unimpeded jet release with high velocity, a diffusive jet release with low velocity, and a release of heavy gases or vapours that spread along horizontal surfaces are given. As these characteristic lines have the low limit threshold, it is difficult to estimate the hazardous area distance when the value of release characteristic is under the low limit threshold. And KS C IEC 60079-10-1(2015) standard shows the concept for a zone of Negligible extent(NE) which can be considered as non hazardous area, but it is also difficult to apply the concept of a Negligible extent. The purpose of this paper is to suggest the guideline for the release characteristic to decide a hazardous area distance and the Negligible extent(NE) being considered as non-hazardous area when deciding a hazardous area distances by the KS C IEC 60079-10-1 standard.