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TI-Spray Foam Insulation System LPG Cargo Tanks

Insulation Technology

T I - S P R AY F O A M

TI-Spray Foam system is the first real new development in LPG cargo tank insulation the last 20 years. It is a step forward to improve insulation efficiency, minimize the maintenance and reduce the application time. "TI-Spray Foam" system is combining existing technology with recent improvement in polyurethane material technology. The new system is a further development of our well-proven "Foam In Situ" technology. A polymeric surface protection coating has been developed in co-operation with world leading chemical companies. This coating will protect the foam against moisture, fire and mechanical impact. The coated surface will withstand the load from personnel on tank

WHY:

To improve insulation life time To improve thermal efficiency To reduce maintenance To improve weather exposure resistance during assembly To increase flexibility in production and assembly To reduce application time

T I - S P R AY F O A M

HOW:

The system is based on polyurethane spray foam and a polymeric surface protection coating. The foam is sprayed to the tank surface and built up to a total insulation thickness of 120 mm in several layers. The surface tolerance will be +10/-5 mm. The spray foam is rigid foam with closed cells for low temperature insulation. The insulation will be able to withstand the temperature gradient through the cross-section with the thermal contraction and expansion of the tank. The foam surface will be protected by a polymeric coating developed for this purpose. Thickness of coating will be from 1 to 3 mm, dependent of location on tank.

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Polyurethane Foam Premixed Polyols and Isocyanate of MDI type Foam density 38 kg/m3 +/- 10% Flammability, B2 - DIN 4102, Part 1 HFC foam with ODP (Ozone Depletion Factor) = 0 Accepted in accordance with the Montreal Protocol and later amendments Polymeric Coating Two component polymeric coating Flammability, B2 - DIN 4102, Part 1 Thickness from 1 mm to 3 mm depending on surface location (Solvent free)

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ADVANTAGES WITH THE SPRAY INSULATION SYSTEM

· The risk for voids in the insulation is eliminated by the spray method No joints in the foam Homogeneous insulation Increased insulation efficiency Increased tightness Non-corrosive and watertight cladding Complete bonding to all surfaces No penetration or space for accumulation of moisture Excellent corrosion protection Spray foam is the most efficient cargo tank insulation system

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APPLICATION ADVANTAGES

· · · · · · · · The visual control during application secure the quality (spraying) Better control of quality when all insulation is applied by 4 to 6 skilled operators Easy to insulate uneven surfaces, corners, supports and odd geometrical shapes Easy to repair Low material consumption Easy material handling Small storage volumes Flexible application; on land, on board or in combination

T I - S P R AY F O A M

APPLICATION SEQUENCE

Insulation of tank support

The tank supports will be insulated with foam in situ method to secure a nice, smooth surface. Prefabricated mould boxes are fitted around the support. The polyurethane foam will be injected through holes in the mould box.

Insulation of tank

The polyurethane foam will be sprayed on to the tank surface in several layers until the required thickness is achieved. Number of foam machines for application will depend on available time. Foam machines and materials will be located in special designed production containers with controlled temperature.

Surface protection coating

The surface protection coating will be applied on the spray foam surface. This coating is specially designed for the purpose, and will protect the foam against moisture, fire and mechanical impact. With this water proof cover the tank can be exposed to all weather conditions without any influence on the insulation. The coating has the right combination of flexibility and strength, and will withstand the load from personnel on tank. It can be applied in variable thicknesses depending on location on tank.

Tank section link up areas

The link up areas will be insulated after assembly of the tank onboard. The coating on the polyurethane foam will be removed so the new foam can be attached and make a homogeneous insulation. The surface coating will be applied. This area will have the same quality as the other parts of the tank.

T I - S P R AY F O A M

CLASS APPROVAL

The insulation system is based on "Foam in Situ" technology and is designed to fulfil requirements from · · · · Lloyd's Register Bureau Veritas Class NK Det Norske Veritas

Approval in principle is issued by Det Norske Veritas to verify that the insulation system is in accordance with rules and regulations for LPG carriers.

A matter of confidence

The real work starts when the contract is negotiated. Work must commence on time and be carried out as planned. With the size and complexity of many projects, there is no substitute for experience and know-how. Choosing the right contractor is a matter of confidence.

TI MARINE CONTRACTING AS Mail: P.O.Box 300 Skøyen, NO-0213 Oslo Norway Office: Drammensveien 175, NO-0277 Oslo Norway Tel: +47 22 13 14 15 Fax: +47 22 13 45 12 Mail: [email protected] www.ti-marinecontracting.com

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