Dyplast's ISO-C1 polyisocyanurate mechanical insulation is the optimal insulation for the vast majority of cold temperature systems within an LNG and other cryogenic facilities. Dyplast's ISO-C1 production line uses hydrocarbon blowing agents, producing polyiso bunstock with superior physical characteristics, high R-factor, and zero ozone depletion potential (zero-ODP), making it a cost-effective and environmentally friendly choice. With the highest R-value to thickness ratio of any commercially available insulation, no other insulation compares. ISO-C1 is highly moisture resistant, strong, durable, and lightweight. It handles, works, and installs easily. ISO-C1's low friability means it creates minimal dust.
ISO-C1 is available in varied densities (2, 2.5, 3, 4, and 6 lb/ft3) and variable sizing which can result in reduced waste when cutting to particular dimensions - - thus resulting in cost savings.
Liquefied Natural Gas or LNG is natural gas (predominantly methane, CH4) that has been converted to liquid form by cooling the gas to -260°F (-162°C ) for ease of storage or transport. Liquefied natural gas takes up about 1/600th the volume of natural gas in the gaseous state. LNG poses particularly complex handling, storage, and transporting problems such as energy loss through thermal inefficiencies, freezing of valves, surface icing, flammability after vaporization into a gaseous state and the potentially resultant asphyxia.
In a typical LNG process, the gas is first extracted and transported to a processing plant where it is purified by removing any condensates such as water, oil, mud, as well as other gases such as CO2 and H2S. An LNG process train will also typically be designed to remove trace amounts of mercury from the gas stream to prevent mercury amalgamizing with aluminium in the cryogenic heat exchangers. The gas is then cooled down in stages until it is liquefied. LNG is finally stored in storage tanks and can be loaded and shipped.
The liquefaction process involves removal of certain components, such as dust, acids, helium, water and heavy hydrocarbons which could cause difficulty downstream. The natural gas is then condensed into a liquid at close to atmospheric pressure by cooling it to approximately -260°F. LNG achieves a higher reduction in volume than compressed natural - - with the energy density of LNG at 2.4 times greater than that of CNG. This makes LNG cost efficient to transport over long distances where pipelines do not exist.
The regasification process is required before the fuel can be distributed as pipeline natural gas, where it can be used in natural gas vehicles, home heating, and multiple other liquid natural gas insulation uses.
ASTM C591 is the Standard Specification for Unfaced Preformed Rigid Cellular Polyisocyanurate Thermal, and is arguably the key Standard used by insulation system end-users and engineer/specifiers to guide decision-making regarding cryogenic insulation. Compliance with ASTM C591 is often a prerequisite within an insulation Request for Proposal. The latest version of the Standard, ASTM C591-17, imposes some additional requirements such as measurement and publication of thermal conductivities [k-factors] measured across a temperature range from +200°F to -200°F. Dyplast has traditionally offered this information to its clients; our k-factor results are excellent.
CINI is the specification that dominates international installations of liquid natural gas (LNG) facilities. Dyplast's 2.5 lb/ft3 density polyiso meets or exceeds all CINI requirments.