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Armaflex Cryogenic Systems: Low-temperature insulation systems for industrial process pipework and tanks
Highly flexible cryogenic foams require neither additional vapour barriers nor expansion joints
The storage and transportation of cryogenic media such as LNG, methanol or ethylene demand high-performance insulation materials. With Armaflex Cryogenic Systems Armacell is now the first supplier to present flexible insulation products which have been specially developed for low-temperature applications. The multi-layered systems ensure exceptional thermal insulation, reduce the risk of corrosion under insulation (CUI) and allow considerable cost savings during the installation process. The insulation systems are ‘patent pending’.
Flexible at cryogenic temperatures
Armaflex Cryogenic Systems provide in a single material the key performance qualities required for insulation materials in low-temperature environments. These could previously only be achieved through a combination of several different materials (for example rigid foams with separate vapour retarders and contraction joints). The new cryogenic foams have low thermal conductivity and retain their flexibility even at low temperatures. Due to this flexibility, vibrations and impact are absorbed and the risk of cracking as a result of extreme temperature cycles or external mechanical strain is reduced dramatically. An important advantage of Armaflex Cryogenic Systems is the fact that they need neither additional expansion joints nor vapour barriers.
Built-in expansion joint
Because of the low-temperature flexibility of the material, the system itself acts as a contraction and expansion joint. Thus the pipe is protected against thermal stress and crack formation. Traditional systems made of rigid foam utilise glass wool or mineral fibre as a buffer against contraction and expansion. This not only increases the installation costs; due to the open-cell material structure of the expansion joints, the risk of moisture infiltrating the system and compromising the insulation effect rises.
Built-in vapour barrier
Moreover, Armaflex Cryogenic Systems do not need additional vapour barriers. Armaflex is a closed-cell material with a high resistance to water vapour transmission and as such has a ‘built-in’ vapour barrier. Unlike traditional systems where each insulation layer must be protected against moisture infiltration by a separate vapour barrier, in the case of Armaflex the resistance to water vapour transmission is built up throughout the entire thickness of the insulation. This not only increases the reliability of the insulation system, but also reduces the in¬stallation costs significantly as there is no need for the time-consuming process of installing vapour barriers with sealants and special adhesive tapes.
Field of application
Armaflex Cryogenic Systems can be used in the temperature range of -180 °C to +125 °C. The inner system layer made of Armaflex LTD is a specially developed diene terpolymer which prevents thermal stress. The outer layers consist of Armaflex, the world’s leading flexible insulation material. With its closed-microcell structure, low thermal conductivity and high resistance to water vapour transmission this material provides installations with long-term protection against moisture infiltration and energy losses. The metal cladding ensures high resistance to mechanical impact. At application temperatures below -110 °C the system is completed by the Armaflex LTD anti-abrasive foil, which provides the inner insulation layer with added surface strength. If noise control is also required on the refrigeration pipework, the combined use of Armacell’s acoustic insulation materials ArmaSound Industrial Systems is recommended. The systems are coordinated with each other and meet the thermal-acoustic requirements with significantly reduced insulation thickness and weight compared to traditional insulation systems.
Due to their high flexibility, Armaflex Cryogenic Systems are much easier and quicker to install than rigid materials and a good fit can be achieved even on awkwardly shaped installations.
Armaflex Cryogenic Systems are specially designed for use on pipelines, tanks and production equipment in the oil, gas and chemical industries. They are also particularly suitable for insulating liquefied natural gas (LNG) installations.
Copyright: Armacell Enterprise GmbH & Co. KG ·
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· Date of Release: 15/2/2019
On these pages we have provided general technical data for the application of our products. For specific industry standards and further guidance within a particular country, please contact our customer service.
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