NFPA 58 – Liquefied Petroleum Gas Code

Focus: LPG Storage, Handling, Installation & Fire Risk Engineering
Duration: 5 Days
Daily Duration: 6 Hours / Day
Audience: Specialized Fire Protection Engineers 
Level: Advanced / Code-Driven / Risk-Based / Industrial-Oriented

This course is structured specifically for fire protection engineers, oil & gas engineers, risk assessors, consultants, and AHJ-facing professionals dealing with LPG systems in industrial, commercial, and large-scale residential applications.

DAY 1 – Code Framework, LPG Fundamentals & Risk Engineering

1. NFPA 58 Philosophy & Scope

• Legal status of NFPA 58

• Relationship to performance-based safety

• Scope limitations (what NFPA 58 does NOT cover)

• Mandatory vs explanatory annex material

• Code enforcement logic

2. Physical & Chemical Properties of LPG

• Composition (Propane, Butane, mixtures)

• Vapor pressure behavior

• Boiling point and expansion ratio

• Flammable limits (LFL / UFL)

• Vapor density and ground-level accumulation

• BLEVE phenomenon

3. LPG Fire & Explosion Phenomena

• Jet fire

• Pool fire

• Vapor cloud explosion (VCE)

• Flash fire

• Fireball formation

• Escalation mechanisms in tank farms

4. Hazard Identification & Risk Zoning

• Vapor dispersion modeling basics

• Hazard radius calculation concepts

• Thermal radiation impact

• Domino effect potential

5. NFPA 58 Interface with Other Codes

• NFPA 54 (Fuel Gas Code)

• NFPA 59 (Utility LP-Gas Plant Code)

• NFPA 13 (Sprinklers)

• NFPA 30 (Flammable Liquids)

• NFPA 101 (Life Safety Code)

• International Fire Code (IFC) comparison

DAY 2 – LPG Storage Systems (Containers & Installation Requirements)

1. Types of LPG Containers

• ASME containers

• DOT cylinders

• Aboveground tanks

• Underground tanks

• Mounded installations

• Spherical vs horizontal cylindrical tanks

2. Container Design Fundamentals

• Pressure rating

• Material requirements

• Corrosion protection

• Seismic considerations

• External fire exposure resistance

3. Installation Requirements

• Minimum separation distances

• Property line clearances

• Building openings restrictions

• Tank-to-tank spacing

• Public way considerations

• Saudi climate impact on spacing

4. Underground & Mounded Tank Installations

• Burial depth requirements

• Cathodic protection

• Anti-floatation design

• Access and inspection challenges

5. Container Appurtenances

• Pressure relief valves (PRV)

• Excess flow valves

• Backflow check valves

• Level gauges

• Remote shutoff devices

DAY 3 – Piping Systems, Valves & Overpressure Protection

1. LPG Piping Design Requirements

• Approved materials

• Pressure ratings

• Aboveground vs underground piping

• Corrosion protection

• Flexible connectors

2. Pressure Regulation Systems

• First-stage regulators

• Second-stage regulators

• Two-stage systems

• Regulator venting requirements

• Overpressure scenarios

3. Relief Valve Engineering

• Relief valve sizing principles

• Fire exposure venting requirements

• Discharge location requirements

• Avoiding flame impingement hazards

4. Emergency Shutoff & Flow Control

• Internal valves

• Emergency shutoff valves

• Remote actuation requirements

• Shear valves for dispensing systems

5. Vaporization Systems

• Natural vaporization limits

• Vaporizer types

• Sizing considerations

• Failure modes in high-demand systems

DAY 4 – Industrial Applications, Dispensing & Special Occupancies

1. LPG in Industrial Installations

• Bulk storage facilities

• Tank farms

• Cylinder filling plants

• Process heating systems

• Power generation applications

2. Dispensing Systems

• Vehicle refueling systems

• Auto LPG stations

• Dispenser protection requirements

• Impact protection (bollards)

• Emergency shutdown requirements

3. Cylinder Storage & Exchange Locations

• Quantity limitations

• Indoor vs outdoor storage

• Ventilation requirements

• Fire protection requirements

4. Fire Protection for LPG Installations

• When water spray is required

• Cooling requirements for tanks

• Deluge system interface

• Passive fire protection considerations

• Fire exposure protection

5. Electrical Classification Around LPG Installations

• Hazardous location classification

• NEC Class I Division 1 & 2 interface

• Ignition source control

• Bonding and grounding requirements

DAY 5 – Inspection, Failure Analysis & Engineering Judgment

1. Inspection & Testing Requirements

• Initial inspection

• Periodic inspection

• Leak testing

• Regulator testing

• Relief valve maintenance

2. Common LPG System Failures

• Improper regulator installation

• Inadequate separation distances

• Relief valve discharge into unsafe zones

• Corrosion failures

• Overfilling incidents

3. BLEVE Case Study Analysis

• Incident breakdown

• Escalation timeline

• Root cause analysis

• Lessons learned

4. Engineering Review Workshop

• Reviewing tank layout drawings

• Identifying code violations

• Calculating separation distances

• Evaluating exposure protection

5. Code Minimum vs Engineering Best Practice

• When minimum spacing is not enough

• Risk-based enhancements

• Redundancy strategies

• Integrating quantitative risk assessment (QRA)

• Designing for Saudi environmental conditions

Course Outcomes

By the end of this course, participants will be able to:

• Design LPG storage and distribution systems compliant with NFPA 58

• Evaluate separation distances and exposure protection correctly

• Identify escalation risks such as BLEVE and vapor cloud explosion

• Review contractor submissions with technical authority

• Integrate LPG safety with fire protection strategy

if you would like to get our course content please register . . .