When it comes to transferring LNG efficiently and economically, look no further than Cryogas Vacuum Jacketed Pipe (VJP) solutions. It stands as the optimal piping solution for the secure, dependable, and cost-effective transfer of low temperature fluids.

Cryogas provides LNG pipe materials options with SS316L (1.4404) or 304L (1.4301/1.4307). We also provide fully welded W-series pipe connections for secure and zero-emission joints, with 80% lower heat leaks than any competitive products in the market. 

Built with our advanced Super Insulation technology, VJP from Cryogas guarantees incredible reduction in heat leakage and boil-off-gas (BOG) in your LNG pipeline, ensuring system pressure buildup remains controlled to safeguard your assets and minimizing economic losses to absolute minimum.

VACUUM JACKETED PIPE (VJP)

Cryogas Cryogenic, with prior experience in designing and commissioning several VJP systems for large scale cryogenic facility, bring invaluable expertise to ongoing prototyping and technology development for VJP in LNG application. Our focus remains on enhancing performance, safety, reliability, durability, and maintainability.

Our latest VJP design presents significant technical and commercial advancements over VJP systems built in the 2010s and conventional foam insulation systems.

Design Features:
The VJP shares a stainless-steel core pipe with conventional PIR/PUR systems but is enclosed within an external pipe in a 'pipe-in-pipe' configuration. The radial gap between the pipes is insulated with multiple layers of highly reflective aluminum foil to minimize radiation heat input. Additionally, this space is evacuated to high vacuum to eliminate heat transfer through conduction, convection and radiation.

LNG VJP is equipped with an internal expansion joint (bellows), the LNG VJP enables the core pipe to self-compensate for thermal contractions during normal operation, ranging from room temperature to -162°C.

The jacket pipe experiences environmental temperature fluctuations, from low temperatures during winter nights to elevated temperatures of up to 75°C due to solar heating in summer. Thermal movements in the jacket are minimal and can be safely managed by expansion bellow with rigid pipe supports within allowable design stress limits.

Each VJP spool, up to 36m long, maintains a consistent length under all operating conditions, eliminating the need for expansion loops in straight lengths of up to 1 km in LNG terminals.

Pipe supports, welded to the jacket pipe, form an integral part of the VJP spool and are directly bolted onto pipe racks, modules, or plinths at job sites. These supports can withstand significantly higher loading than conventional PIR/PUR pipe supports, particularly axial thrust load induced by thermal contraction/expansion and dynamic loads from abrupt LNG flow changes.