LNG 

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

For LNG applications, CSM provides option on material of construction with SS316L (1.4404) on top of our standard 304L (1.4301/1.4307). We also provide W-series fully welded connections for leak free, higher level of safety and 80% lower heat leaks than any competitive connection in the market. 

Our advanced Super Insulation technology, designed with an emphasis on safety and efficiency, guarantees the reduction of boil-off-gas (BOG) and improve preservation of your valuable LNG in the pipeline. With an exceptional ability to minimize heat leakage, this technology ensures that pressure buildup remains controlled, safeguarding your assets and minimizing losses to the absolute minimum.

 

LNG Storage Facility

LNG Pipeline in Storage Facility 

LNG Unloading

LNG Pipeline in Loading and Unloading

 

VACUUM INSULATED PIPE (VIP)

Overview

In the late 1990s, large diameter vacuum insulated piping (VIP) was first introduced and utilized in LNG export terminals. Subsequent developments by a few oil and gas industries yielded mixed results until the early 2010s, when reliable and maintenance-free VIP designs were established based on earlier experiences and operational insights.

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

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

Design Features:

The VIP 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 levels to eliminate heat transfer through conduction and convection.

LNG VIP is equipped with an internal expansion joint (bellows), the LNG VIP enables the core pipe to self-compensate for thermal contractions during normal operation, ranging from neutral status 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 rigid pipe supports and adjoining pipe spools within allowable design stress limits.

As a result, each VIP 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 VIP 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.

Benefits of VIP

Enhanced Thermal Insulation

The superior thermal insulation of VIP is attributed to the absence of major heat transfer media, including conduction via solids and convection via gas/fluid. Unlike conventional mechanical insulation media such as PIR and PUR, which rely on thermal conductivity coefficient and insulation thickness, VIP maintains consistent insulation performance over time, provided the operating vacuum is maintained.

For instance, while conventional PIR or PUR insulation degrades over time due to air and moisture ingress, resulting in increased heat flux to LNG, VIP offers significantly better insulation performance, yielding reduced boil-off gas and extended hold time for LNG storage.

Reduced Expansion Loops

CSM Cryogenic's latest VIP design offers structural advantages that reduce the need for expansion loops, leading to substantial cost savings in pipe material procurement, insulation, and civil construction. 

Reduced Pressure Drop

Fewer expansion loops in VIP result in lower pressure drop in LNG loading lines, allowing for design pressure reduction or downsizing of pump capacity and pipe thickness, thereby saving costs.

Integrated Pipe Support

VIP spools come equipped with welded pipe supports, customizable to suit client requirements. These supports are designed to withstand various loading conditions during normal and abnormal operations, providing enhanced safety and reliability.

Secondary Confinement for Environmental Protection

In the event of core pipe leakage, VIP's secondary confinement feature temporarily confines LNG within the jacket pipe, preventing uncontrolled spillage and minimizing environmental hazards.

Superior Protection

VIP spools offer immunity to corrosion, as the core pipe is fully contained within a vacuum condition, eliminating moisture and oxygen ingress. Additionally, the sturdy jacket pipe provides protection against external impacts, weather elements, and fire, ensuring reliable performance with minimal maintenance.

Operation and Maintenance

VIP spools undergo rigorous factory testing to ensure maintenance-free operation throughout their lifespan. With an anticipated design life of 40 years, VIP requires minimal maintenance, offering substantial cost savings over time.

Expedited Installation and Reduced Project Risk

Pre-tested and sealed VIP spools are delivered ready for installation, reducing project timelines and labor costs. With pre-tested spools, on-site pressure testing is limited to field-welds at spool joints, further streamlining installation and reducing project risk.

Overall, CSM Cryogenic's VIP solutions offer unparalleled performance, reliability, and cost-effectiveness, setting new standards in cryogenic piping technology.

Products for LNG applications:


Learn more:

 New Energy Overview (LNG).pdf