The development Of the new CEN standard For fire fighting foam systems EN13565 Part 2

The development Of the new CEN standard For fire fighting foam systems EN13565 Part 2

Presented by: Bob Whiteley Engineering & Standards Manager Tyco Fire & Integrated Solutions Ltd Convenor CEN/TC191/WG2

Fire Fighting Foam systems Where are foam systems used? Flammable liquid hazards Why are foam systems used? Extinguish fire Suppress vapours Minimise loss & pollution Why is a new standard needed? Consistent approach Reflect current technology

EN13565 Part 2 Background and basis of standard Scope of the standard Protection concepts used The new design approach Status of the standard

CEN/TC191/WG2 Working Group membership 2 - Oil industry representatives 1 Consultant 1 foam equipment and media manufacturer 2 system design and installation contractors 2 component / media test & approval agencies

Background information: German Planning and Installation Rules UK BS5306 Parts 6.1 & 6.2 NFPA 11,11A,16,409 Lastfire Project data Foam Spex research project

Scope of the Standard - For competent persons -As part of a risk management strategy derived from risk assessment by others -For class B and some Class A fuels -Low, Medium and High Expansion foams -Integrated with process control and manual fire fighting provisions.

Typical Applications Hazard Low Exp. Medium Exp. High Exp. Flamm. Liquid storage tanks No No Tank Bunds indoors Process areas indoors Aircraft hangars Type 3 only Fuel transfer indoors LNG No No LPG No Marine Jetties No Warehouses-class A&B fuels No

Planning Fuels, hazard areas for protection Type & location of foam proportioning Water supply requirements

Water Supplies -Flow & pressure largest design scenario - Includes water cooling requirements - Available at all times - EN12259 Pt12 - Main & reserve pumps

Water Quality No sediments or pollution- Reduces foam expansion Affects foam properties

Foam concentrates EN1568 series foam standards Proportioner compatible Enough Foam for maximum demand (flow + time) Continuous operation 100% reserve < 24 hrs

Foam Quantity V = q x A x t x Z/100 Where: V = Quantity of foam concentrate required - litres q = foam application rate lpm/m 2 A = protected area - m 2 t = operating time minutes Z = proportioning rate -%

Foam supplies Pumps max. flow-new pipe + proportioner tolerance. Proportioners EN13565 Part 1 - Accuracy - Annual testing - Max + min. flow

Piping EN 12845 (sprinklers) Normally empty pipe galvanised steel Flushing and drain connections Foam concentrate foam compatible - no galvanised pipe. Non Newtonian foams (AR) Aspirated foam friction loss = 1.042 Q 2 /d 5

Detection and Control Manual release clearly identified Alarms manned stations Pre-discharge alarms personnel hazards Large outdoor tanks delayed discharge - mitigation measures

Foam System Design New approach EN1568 foam classifications Type of object protected Height of nozzles

Application rate low / medium expansion foam Q = q th x f c x f o x f h Where: Q = minimum application rate lpm/m 2 q th = nominal application rate = 4 lpm/m 2 f c f o f h = correction factor foam classification = correction factor object = correction factor nozzle height

f c correction factor foam classification EN1568-3 1-3 Ext. time A-D Burnback Extinguishing Corr. Factor Corr factor Foam types Perf. Class Spill Fuel in depth 1A/1B 1.0 1.0 AFFF-AR. FFFP- AR. FFFP 1C/1D 1.0 N.A. AFFF,FFFP 2A/B 1.1 1.0 FP,FP-AR 2C/D 1.25 N.A. FP 3B 1.5 N.A. S,P 3C/3D 1.75 N.A. S

f o - correction factor- object Hazard Fire type handlines monitors Fixed systems Top pouring Sub surface Open top floating roof tanks Rimseal area Back-up only 2 X 200 lpm for 30 mins N.A. 3.0 for 30 mins N.A. Fixed cone roof tanks Full surface area <10m dia 2.5 for 60 mins >10m + WM N.A. <45m dia 2.5 for 60 mins <60m dia 2.75 for 90 mins >60m dia 3.0 for 90 mins <45m dia 1.0 for 60 mins <60m dia 1.25 for 60 mins >60m dia 1.5 for 60 mins 1.0 for 60 mins

Foam water sprinkler / deluge Fuel < 25mm deep 3000 m 2 per zone 10 minutes foam supply

Marine loading / unloading docks 2 elevated monitors Ship-shore connections 4hr water supply 30 minute foam Under-dock

Aircraft hangars NFPA 409 2 types detection Floor coverage-30 seconds 30 minutes water 10 mins foam + 100% Under/over wing monitors Overhead deluge + under-wing Hi-X - 1.65 m 3 /min/m 2

High Expansion Foam Class A risks - Cover fuel + 3m R=V/T x C N x C L With sprinklers not recommended

LPG/LNG HI-X expansion limited-500:1 Fire control / Vapour suppression 1 hr foam

Test & Inspection Piping flush + pressure test Proportioner test accuracy Distribution check coverage Weekly inspect valves 6 monthly test pumps + alarms 12 monthly test proportioner foam substitute? Test valves.

Status of EN13565 Part 2 Publication date 31 st August 2009

The cost of success is only exceeded by the cost of failure