The steel pipe manufacturing industry deals with facilities and materials. Especially thermal facilities are close to vapor cloud explosion (VCE) and may cause secondary damage to facilities because they deal with corrosive substances such as hydrofluoric acid, sulfuric acid and acid, fire, explosion, leakage etc. It is in danger. In this study, hazard identification method was conducted using HAZOP techniques and quantitative risk analysis was conducted using e-CA, a program that supports accident impact analysis. Equipment in the influence range of ERPG - 3 was determined to be a facility requiring replacement. It was decided that neutralization is necessary using slaked lime. Based on the cost of loss, We presented the proper replacement which is the timing of the dangerous facility. As a result, It was ideal to replace the facilities with 20 years of heat treatment facilities, one year of hydrofluoric acid storage tank, 20 years of sulfuric acid storage tank, and 5 years of hydrochloric acid storage tank.

Abstract
 1. 서 론
 2. 이론적 배경
  2.1 강관 제조업
  2.2 위험성 평가 기법
  2.3 화학물질 비상시 누출 기준
 3. 연구방법
  3.1 연구대상
  3.2 위험성평가 및 전략 도출
 4. 연구결과
  4.1 정성적 위험성평가 결과
  4.2 강도 분석 결과
  4.3 손실비용 산출
  4.4 비용 분석
 5. 결론
 6. References

• 권혁민(인하대학교 환경·안전융합대학원) | Hyeok Min Kwon (Department of Environment and Safety Technology Convergence, Inha University)
• 황용우(인하대학교 환경안전융합전공) | Yong Woo Hwang (Department, of Environmental Engineering, Inha University) Corresponding Author
• 이익모(인하대학교 환경·안전융합대학원) | Ik Mo Lee (Department of Environment and Safety Technology Convergence, Inha University)
• 천영우(인하대학교 환경·안전융합대학원) | Young Woo Chun (Department of Environment and Safety Technology Convergence, Inha University)
• 천영훈(인하대학교 환경·안전융합대학원) | Young Hun Choi (Department, of Environmental Engineering, Inha University)