[Complete Reading] Assessment of the Fire safety of an Onshore installation

DEP 80.47.10.30, PTS 80.47.10.30

Assessment of the Fire safety of an Onshore installation 

 

1. Introduction

2. Fire Safety Assessment (FSA)

   2.1 General 

   2.2 Sequential steps to be taken during a fire safety

         2.2.1 Determination of loss of containment and fire scenarios 

                  2.2.2.1 Loss of Containment of scenario 

                  2.2.2.2 Fire Scenarios

         2.2.2 

                  2.2.2.1 Pool fires

                  2.2.2.2 Jet fires

                  2.2.2.3 Flash fires

                  2.2.2.4 VCE

                  2.2.2.5 BLEVE

                  2.2.2.6 ATM tank fires 

 

         2.2.3 Assessment of the detection time 

         2.2.4 Determination of the fuel supply reduction measures 

         2.2.5 Quantification of the fire/leakage

         2.2.6 Determination of required protection measures 

 

2.3 Fire Prevention Measures

2.3.1 Measures to prevent HC leakage: P&ID checklist에 포함되어야 함

• Piping arrangement
• Fewer flanges for HP, H2, Lighter HC or chemicals, HT or AIT 
• Small bore piping 
• Fail-safe position of the instrument & valves 
• Level gauges - magnetic 
• Shaft sealing systems 
• Early detection 

 2.3.2 Measures to minimize HC leakage quantities: P&ID checklist에 포함되어야 함

• Segregation of particular sections of the plant: ROV/EIV, ESD
• Rapid dumping of parts of the plant inventory: EDP, Liquid dropout
• Provision of rapid detection facilities: FGS

2.3.3 Measures to minimize the probabilities of ignition of HC leakage 

• Layout and spacing
• Surface drainage arrangement 
• Less confined/congested

 2.4 Fire Protection objectives and principles 

 2.5 Fire Fighting preparedness 

화재를 대비한 조직적, 기술-설비적 사전 준비 

 

 

3. Assessment of Fireproofing 

2.4.2 내용 포함 

3.1 General

Limited time and limited degree of exposure 

Fireproofing should not be considered as a replacement for active fire fighting or lead to relaxation  of normal design requirements (spacing and layout considerations) and precautions in operation and maintenance. => FP design strategies

3.1.1 Resistance against a fire 

The length of time. A min of 30 minutes protection time against HC fire. => Design philosophy와 연계해야 함. 다른 FP measure를 설계할 때 적용해야 하는 기준임. 30분동안 FP의 성능이 유지되도록 test/maintanance, 30분안에 ESD/Isolation/DEP/ER 출동/대피 등이 이루어져야 함. 이런 기준으로 design 되어야 함. 이래서 IPL로 간주하기 힘듬. consequence 연계 - small/medium fire, not big fire. 이 기준도 isolatable section/fire zone 기준으로 판단되어야 함. 

 

3.2 Defining the fireproofing zone

3.3 Fireproofing of equipment and structures 

3.3.10 Process vessels, storage vessels, and piping 

Fixed water spray -> Fireproofing 

 

4. AFP System and Facilities 

5. FF Agents, systems, and Equipment 

6. Fire Safety Requirements for Specific Areas and Equipment : P&ID checklist에 포함되어야 함

6.4.1 Columns and vessels: fire protection for vessels 

6.5