LNG Project

LNG Pipeline Insulation Case Study — Cold Loss Comparison at -162°C

LNG pipelines operate at around -162°C — the boiling point of liquefied natural gas — where even small insulation gaps translate into real cold loss, condensation risk, and higher boil-off gas rates. This LNG pipeline insulation case study documents three insulation configurations tested on the same φ89 cryogenic line, under identical humid ambient conditions, so buyers can compare real performance rather than datasheet claims.

Project Snapshot

• Application: LNG cryogenic pipeline

• Pipe size: φ89

• Medium temperature: -162℃

• Ambient temperature: 28.5℃

• Relative humidity: 70%

The Challenge

Insulating a pipeline against a -162°C medium in a humid 70% RH environment is a different problem than standard cold-service insulation. Moisture that reaches the pipe surface can freeze, expand, and physically damage the insulation structure over time — and every gap in coverage shows up directly as cold loss, which on an LNG system translates into higher boil-off gas and real operating cost. Many buyers default to thick polyurethane rigid foam because it's a familiar, lower-upfront-cost material, without testing whether that thickness actually delivers the lowest cold loss per meter of pipeline. This LNG pipeline insulation case study was run specifically to answer that question with data.

Reading the Results

Solution A — 50mm of aerogel blanket alone — cut installed thickness by over 50% compared to the 110mm polyurethane foam baseline (Solution C), while still achieving the lowest linear cold loss of the three configurations (18.5 W/m vs. 29.8 W/m). That's a 36.7% energy saving rate against baseline. Notably, Solution B — which still relies mainly on polyurethane foam with only a thin aerogel layer added — only reached 23.3% savings, confirming that the improvement comes from aerogel's material performance at cryogenic temperatures, not simply from adding more insulation layers.

For LNG operators, the practical takeaway is direct: a thinner aerogel-based system holds more cold in the line, at less installed bulk, which matters both for cold loss economics and for pipe-rack space in dense LNG facility layouts.

Why NANO TECH

NANO TECH has manufactured silica aerogel and its composites since 2004, holding 28 invention patents and 6 utility model patents. Testing data like the comparison above is generated in-house at our Shaoxing, Zhejiang R&D facility, equipped with thermal conductivity and cryogenic performance testing equipment, and backed by a 32,000㎡ production base with an annual output of 8 million square meters of aerogel. For LNG and cryogenic project buyers sourcing from China, this means direct factory access to a manufacturer that tests and documents real project performance — not just a datasheet copy-pasted across every application.

Explore Further

For full technical specifications of the cryogenic aerogel blanket used in this comparison — including operating temperature range and compressive resistance — see our FMC200 product page.

FAQ

Q:Does this LNG pipeline insulation case study apply to other pipe sizes and temperatures? 

A:The exact figures (36.7% / 23.3% savings) are specific to this φ89 line at -162°C and 70% RH. Cold loss performance shifts with pipe diameter, ambient humidity, and target surface temperature, so our engineering team runs a project-specific calculation before recommending a configuration.

Q:Why does a thinner aerogel layer outperform thicker polyurethane foam at cryogenic temperatures? 

A:Polyurethane foam has a notably higher thermal conductivity than aerogel, and its performance can degrade further if moisture penetrates the material over time. Aerogel's lower thermal conductivity and near-total hydrophobicity mean it insulates more effectively per millimeter, especially in humid environments like this 70% RH test condition.

Q:Can NANO TECH test a configuration for our specific LNG pipe size and conditions? 

A:Yes. Share your pipe diameter, medium temperature, and ambient humidity, and our engineering team can project the expected cold loss and energy saving rate before you commit to a spec.

Q:Is aerogel insulation suitable for both LNG pipelines and storage tanks? 

A:Yes. The same cryogenic-grade aerogel blanket (rated -200°C to 200°C) used in this pipeline comparison is also applied to LNG storage tank insulation and other cryogenic equipment.

Sourcing insulation for an LNG or cryogenic pipeline project? Share your pipe size and operating conditions with our engineering team for a free cold-loss comparison and energy saving projection.