As one of the first cryogenic service providers to enter the LNG industry, it’s well over a decade since Herose started supplying valves for LNG applications. It’s a fast-growing market, one that requires us to respond and adapt accordingly.

Consequently, changes to the specifications of valves and their diverse applications reflect this evolving industry. For example, fire-safe emergency shutdown valves are more prominent on all types of equipment. Similarly, global specifications have become more stringent as the fuelling of ships with LNG takes place closer to densely populated areas.

Applications for LNG valves have increased too as LNG is used in new and exciting ways:

LNG storage vessels
Bulk vessels are used for storing LNG. They supply liquid fuel for many applications such as transportation including lorries, buses and ships. LNG from storage vessels is also vaporised and used in gas form as a source of energy. Vessels are often constructed off site and transported by road or sea up to 100,000 M3. Larger vessels are usually built on site using valves that are similar but slightly larger.

The cryogenic valves used on storage vessels include globe, safety and check valves in stainless steel and the main shut-off valves are normally fire-safe. In addition, fire-safe emergency shutdown valves (ESD) are used to close LNG supply in the event of an emergency. They’re produced to the European standard i.e. DIN EN 10497 or similar and are required to hold back flammable mediums for over 30 minutes. Control valves are also used in these circumstances.

Shaving station vessels normally use larger valves. Typically these 4,500 M3 vessels use 12-inch (DN300) manual and actuated valves. These larger vessels are normally used for maintaining gas pressures in city ring mains during peak demand.

LNG trailers
LNG trailers are used for distributing LNG to storage vessels. They use cryogenic valves similar to those used on storage vessels. However, trailers may use ball or gate valves to achieve greater flow rates, enabling equipment to be filled faster. Metal-seated designs or globe valves are needed as final closing valves to make sure they remain fire safe.

LNG filling stations
The LNG version of a petrol station or gas station mainly uses ball valves and the main shut-off valves are fire-safe globe valves. These full-flow valves are used to ensure faster fill times at lower pressures.

LNG plants and terminals
When it comes to LNG plants and terminals, a more diverse range of valves is needed than for other applications. All the aforementioned valves maybe used, however plant valves usually have higher pressure ratings and terminal valves such as butterfly valves are normally larger.

Herose advise on and supply the valves needed for every stage of the LNG storage and transportation process as featured above. We look forward to what the next decade has in store for the LNG industry. We’ll continue to make it our business to stay ahead of our game so that our clients can stay ahead of theirs when it comes to safety, legal requirements and best practice

Published On: January 6th, 2014 / Categories: Products /