Fire is not just an emergency scenario in high-risk industries. It can escalate rapidly, endanger lives, damage assets and cause long shutdowns. Effective fire safety relies on integrating Active Fire Protection (AFP) and Passive Fire Protection (PFP), so that fires are suppressed and structures survive long enough for people to respond.
1. Active Fire Protection: precision and code compliance
Active systems need mechanical or electrical activation to detect and suppress fire. Navigating the code hierarchy is critical:
- The philosophy. The NBC sets out what is legally required for approval, IS codes (such as IS 3844 and IS 1339) govern how systems are installed, and NFPA provides advanced calculations for high-precision design.
- Firewater infrastructure. Compliance requires a dedicated storage tank and a strict three-pump configuration, comprising a main electric pump, a diesel standby pump and a jockey pump, per IS 15105 to keep system pressure constant.
2. Passive Fire Protection: slowing the radius of harm
PFP is engineered materials and systems built into the structure, so it needs no activation. It maintains structural integrity under extreme hydrocarbon fire loads and is designed to protect steel and critical equipment, delay structural failure and give time for evacuation and emergency response.
- A two-hour window. Advanced stone wool insulation meeting UL 1709 can protect critical piping for up to two hours.
- Buying response time. PFP stops structural steel reaching critical failure temperatures quickly, which restricts the radius of harm and gives emergency teams time to isolate the source.
Common fireproofing materials
- Intumescent epoxy. Expands to form an insulating char layer; used offshore and in high-risk facilities.
- Cementitious (vermiculite-based). Lightweight, thermally insulating and stable during fire.
- Dense concrete. Heavy-duty protection for hydrocarbon fire scenarios.
Fireproofing engineering methodology
Fire scenario identification, critical equipment assessment, selection of suitable fireproofing systems, definition of thickness and coverage, and integration with fire and explosion studies. The outputs are a PFP philosophy and layout drawings, material selection and thickness calculations, and compliance documentation.
3. The dual challenge: fire readiness versus corrosion under insulation
Traditional insulation materials trap moisture and can cause Corrosion Under Insulation (CUI), a serious risk that can lead to catastrophic pipeline rupture. Next-generation single-layer stone wool gives full fire resistance at half the thickness of conventional materials, and its water repellency removes CUI pathways while keeping the system fire-ready.
Why it matters
Combined AFP and PFP strategies enhance personnel safety, protect assets and infrastructure, reduce fire escalation risk, support emergency response and evacuation, and support regulatory compliance.
How EnTech can help
Our services include active fire protection design and hydraulic calculations (NFPA, NBC and IS codes), firewater demand calculations, tank sizing and pump room optimisation, PFP audits and compliance verification (UL 1709), risk-based PFP philosophy, CUI risk mitigation and thermal insulation reviews, with integration into fire and explosion studies. Contact us at info@EnTech-Solution.com.