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Darchem Thermal Protection<br />
<strong>Darmatt</strong> <strong>H30</strong> EASYFIT Flexible Passive Fire Protection<br />
Darchem Thermal Protection launches <strong>the</strong> <strong>Darmatt</strong> <strong>H30</strong> EASYFIT<br />
flexible jacket Passive Fire Protection system.<br />
Darchem’s well renowned and Lloyds Type Approved <strong>Darmatt</strong> flexible PFP jackets have traditionally used a<br />
stainless steel 316 multi-strand lacing method to fasten <strong>the</strong> PFP enclosure panels toge<strong>the</strong>r. The lacing method<br />
ensures enclosure integrity is maintained throughout <strong>the</strong> installed product lifetime, and that <strong>the</strong> most<br />
strenuous of fire conditions is resisted. Offering up to 180 minutes Jet Fire and Hydrocarbon Pool fire<br />
protection, <strong>Darmatt</strong> can be fitted to valves, actuators, instrument panels, process vessels, cable trays,<br />
pipework and has been supplied extensively worldwide for both Onshore and Offshore Oil & Gas and<br />
Petrochemical installations.<br />
Darchem recognises that for up to <strong>H30</strong> fire specifications, o<strong>the</strong>r options of securing flexible jacket enclosures<br />
are safe and reliable, and are introducing a new Lloyds Type Approved version of our flexible PFP jacket,<br />
<strong>Darmatt</strong> <strong>H30</strong> EASYFIT<br />
<strong>Darmatt</strong> <strong>H30</strong> EASYFIT features<br />
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Fire Condition - Hydrocarbon Pool Fire Engulfment up to 30 minutes<br />
Protection period, limiting temperatures and jacket thickness all governed by Lloyds Type Approved<br />
Offtranp software calculations for each item of equipment protected<br />
Belts and buckle fastening method for fast installation and removal<br />
Access doors for maintenance and inspection<br />
Darvent intumescent vents for cooling and ventilation<br />
Stainless steel 316 or GRP space frame options<br />
Standard and high temperature outer cloth options for extreme process temperatures<br />
Coloured cloth options for customisation in line with plant identification policies<br />
Access panels – showing<br />
external securing straps and<br />
internal ‘plug panels’ to seal<br />
against fire paths<br />
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Darchem Thermal Protection
DARMATT <strong>H30</strong> EASYFIT<br />
Darvent<br />
intumescent grills<br />
for ventilation<br />
and cooling<br />
Optional<br />
space<br />
frame<br />
design for<br />
access to<br />
actuator<br />
controls<br />
Construction Details<br />
Each <strong>Darmatt</strong> enclosure is specifically engineered to fit closely<br />
around <strong>the</strong> protected equipment providing removable, compact and<br />
user friendly fire protection. <strong>Darmatt</strong> is constructed from pre-shaped<br />
panels designed to fit toge<strong>the</strong>r around <strong>the</strong> equipment to be protected.<br />
Each panel is made up of layers of insulation fibre and reflective foil,<br />
compressed and studded with nylon pins throughout <strong>the</strong> panel’s area.<br />
The complete exterior is covered by a non-fire rated wea<strong>the</strong>r resistant<br />
outer cloth.<br />
The nylon pins hold <strong>the</strong> components in <strong>the</strong> <strong>Darmatt</strong> PFP system toge<strong>the</strong>r to ensure that <strong>the</strong> insulation<br />
materials remain securely in place and do not migrate to a different part of <strong>the</strong> panel (as experienced with<br />
lower quality PFP and insulation jacket systems). The nylon pins also compress <strong>the</strong> insulation to approximately<br />
60% of its original thickness to provide a very flexible but compact system. All this helps to ensure that <strong>the</strong> PFP<br />
system is easy to remove and re-install.<br />
Accessibility – Space Frame, Inspection Hatches, and Penetrations<br />
Inspection hatches can be provided for each <strong>Darmatt</strong> installation to provide quick access to areas<br />
of <strong>the</strong> protected equipment that requires regular inspection or maintenance. Also, access can be<br />
fur<strong>the</strong>r improved by utilisation of a space-frame around actuator controls. Lloyds have approved<br />
<strong>the</strong>se hatches and use of a pultruded GRP or SS316 angle frame work incorporated within <strong>the</strong><br />
<strong>Darmatt</strong> PFP system.<br />
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Darchem Thermal Protection<br />
Revision July 2013
DARMATT <strong>H30</strong> EASYFIT<br />
Penetrations for operating mechanisms, hydraulic tubing and<br />
position indicators etc. can be provided to facilitate problem-free<br />
operation and maintenance of equipment without <strong>the</strong> need to<br />
remove <strong>the</strong> jackets.<br />
It is important that <strong>the</strong> client identifies any requirements for<br />
hatches and penetrations as early as possible such that <strong>the</strong>y can<br />
be incorporated into <strong>the</strong> <strong>Darmatt</strong> PFP system’s design.<br />
<strong>Darmatt</strong> <strong>H30</strong> EASYFIT PFP Panel Fastening Method<br />
Unlike traditional <strong>Darmatt</strong>, <strong>Darmatt</strong> <strong>H30</strong> EASYFIT panels are fastened<br />
toge<strong>the</strong>r using high quality multi-layer straps containing fire resistant KM-1<br />
cloth. Coupled with a D-ring buckle system, <strong>the</strong> straps can be pulled tight to<br />
ensure a secure fit of <strong>the</strong> panels around <strong>the</strong> equipment in such a way that <strong>the</strong>y<br />
take shape around <strong>the</strong> valve / actuator. Once installed, each panel will retain<br />
its moulded shape making future removal / installation quicker and easier.<br />
The straps are specially manufactured in-house by Darchem, and testing has<br />
shown strength, form and function to be retained for fire periods greater than<br />
60 minutes.<br />
Testing & Certification<br />
Since its introduction <strong>Darmatt</strong> has been tested continuously to prove its capability as a passive fire<br />
protection system. Similarly, <strong>the</strong> <strong>Darmatt</strong> <strong>H30</strong> EASYFIT system has been tested and witnessed by Lloyds<br />
Register and approved for 30 minutes UL1709 hydrocarbon pool protection. Although testing showed that<br />
<strong>Darmatt</strong> <strong>H30</strong> EASYFIT can be designed to protect valve, actuators and o<strong>the</strong>r critical equipment for a period of<br />
greater than 30 minutes, Darchem offers our traditional <strong>Darmatt</strong> SS316 laced jackets for longer Hydrocarbon<br />
Pool fire and Jet Fire periods.<br />
<strong>Darmatt</strong> <strong>H30</strong> <strong>Easyfit</strong><br />
Lloyds witnessed furnace<br />
test sample – before and<br />
after images from 60<br />
minutes at 1,100°C and <strong>the</strong>n<br />
furnace cool down time<br />
The <strong>Darmatt</strong> PFP System is Lloyds Type Approved and also holds additional accreditation from DNV and ABS.<br />
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Darchem Thermal Protection<br />
Revision July 2013
DARMATT <strong>H30</strong> EASYFIT<br />
Optimisation of Insulation Thickness<br />
Darchem Engineering use Lloyds approved software called “Offtranp” to determine <strong>the</strong> optimal insulation<br />
thickness for each PFP application. This ensures that adequate insulation is provided to protect <strong>the</strong> equipment<br />
in <strong>the</strong> fire condition and that <strong>the</strong> thickness of <strong>the</strong> insulation is kept to <strong>the</strong> absolute minimum. The following<br />
factors are input into “Offtranp” to confirm <strong>the</strong> temperature drop across <strong>the</strong> insulation after a set period of<br />
time during <strong>the</strong> fire:<br />
<br />
<br />
<br />
<br />
Type and duration of Fire<br />
Limiting Temperature Rise<br />
Relevant ambient and operating temperatures<br />
Mass and volume and exposed Surface Area of Equipment<br />
<strong>Darmatt</strong> applications include:<br />
Valves and<br />
actuators<br />
Process vessels<br />
Pipe work and flanges<br />
Cable trays<br />
Darchem Thermal Protection, Darchem Engineering Ltd, Stillington, Stockton-On-Tees, TS21 1LB, UK<br />
Tel +44 1740 630461 – Email dtpsales@darchem.co.uk – Website www.darchem.co.uk<br />
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Darchem Thermal Protection<br />
Revision July 2013