Featured Product
This Week in Quality Digest Live
Metrology Features
Mark Hembree
Is collaboration overrated?
Belinda Jones
Reaping the benefits of manufacturing intelligence
Nisan Lerea
The method delivers clean, readily inspectable specimens while preserving the original properties of the material being tested
Emily Newton
As demand for PCBs increase, so does the need for faster, comprehensive testing

More Features

Metrology News
Delivers new benchmark in modularity, performance, robustness, and expandability
New lines improve software capability and analysis
VSL hosts special edition of show at new center in Rotterdam
Latest line touts comprehensive coverage, ease of use
Same price, double the resolution and accuracy
Former service partner provides honing and deep-hole drilling solutions
Redesigned family of heavy-duty shop stands delivers unprecedented metrology instrument mobility
Diagnoses LVDT failures, disconnects, or short circuits

More News

Quality Digest

Metrology

NewTek Hazardous Location Sensors Monitor Structural Integrity of Storage Tanks

Approved for use in Class 1, Zone 0, and Zone 2 locations

Published: Thursday, November 10, 2022 - 12:01

(NewTek: Pennsauken, NJ) -- With the significant rise in demand for liquified natural gas (LNG) exports to Europe in the wake of supply shortages from Russia, liquefication and export facilities in the Gulf must prioritize the reliability and regulatory compliance of LNG tanks that store large reservoirs of LNG. NewTek Hazardous Location Position Sensors monitor the structural integrity of LNG tanks, helping to meet Federal Energy Regulatory Commission (FERC) regulations for structural health monitoring.

To prepare LNG for export, natural gas is cooled to cryogenic temperatures at liquefication facilities, then stored as a liquid until pumped into LNG tanker ships for export. The LNG storage tanks are double-walled, consisting of an inner container that holds the liquid and an outer container of vapor pressure that insulates it and serves as a backup in the event of a leak. NewTek Hazardous Location LVDT Position Sensors measure the inner tank position in relation to the external tank to provide operators with a complete picture of any movement of the structure caused by thermal contraction or expansion in any direction, as well as the settling or shifting of the tank foundation.

The sensors offer extremely accurate displacement measurement that is essential to monitoring the spacing between the tank containers, which is inaccessible by operators for years at a time. In operation, LVDT brackets are affixed to at least six locations along the outer tank at 60° apart. The LVDT core rod is connected to the wall of the inner tank.

The Hazardous Location LVDT provides absolute output with no long-term drift, which is essential as measurements are recorded once every quarter. Serving as part of a health monitoring solution for LNG tanks, the sensors assure the quality of the tank’s structural performance and enable operators to assess a tank’s condition after a major event, as is required by the regulations.

Approved for use in Class 1, Zone 0, and Zone 2 locations, the hazardous location certifications of NewTek’s NT-HL-750 series of LVDT are preferred in this application. Even though the space between the inner and outer tank containers is normally filled with nitrogen, a leak in the inner tank can result in gas seeping into the space between the tanks where the sensors operate. Intertek-approved and holding an ETL certification for use in hazardous locations throughout North America, the sensors also operate safely and accurately in hazardous and explosive environments with the presence of flammable or ignitable gases and liquids such as those found in refining and petrochemical plants and pipelines.

NewTek’s NT-HL-750 series of Linear Position Sensors have standard lead times of 6 to 8 weeks, with expediting options available for emergency requirements. For more information, refer to https://www.newteksensors.com/lvdt-sensors/hl-750-series/ or contact Mike Marciante at 856-406-6877 to discuss your application requirements.

Discuss

About The Author

Quality Digest’s picture

Quality Digest

For 40 years Quality Digest has been the go-to source for all things quality. Our newsletter, Quality Digest, shares expert commentary and relevant industry resources to assist our readers in their quest for continuous improvement. Our website includes every column and article from the newsletter since May 2009 as well as back issues of Quality Digest magazine to August 1995. We are committed to promoting a view wherein quality is not a niche, but an integral part of every phase of manufacturing and services.