New therm meter for LNG deliveries

Journal Article · Thu Dec 01 04:00:00 EST 1977 · Instrum. Technol.; (United States)

OSTI ID:5046087

Mann, D

The U.S. National Bureau of Standards (NBS) has developed a three-element therm meter that can count Btu's in a -260/sup 0/F fluid. It is similar to those used by industry for ambient temperature shipments but especially adapted for the severe environment of an LNG pipeline, according to D. Mann (Natl. Bur. Stand.). The metering system contains a volumetric flowmeter, a direct-reading densitometer, and a combustion calorimeter to measure cu ft/hr of gas flowing, lb/cu ft, and Btu/lb. The system works in the 36-42 in. dia pipelines used for off-loading LNG and is accurate to +/-0.5 to +/-1% in tests on lines up to 10 in. dia. The metering system has been tested in a 3 in. dia pipeline at the NBS Boulder laboratory and in a 10 in. dia pipeline in a New Jersey peak-shaving facility that uses LNG. The next test will be in a 12 in. pipeline in the terminal that Southern Natural Gas will begin to use in the winter of 1977-78 to receive Algerian LNG. An accurate cryogenic measurement system is needed to bring the potential financial loss due to measurement error down to perhaps $20,000 per ship load from the $100,000 possible with currently available therm meters.

• Research Organization: US National Bureau of Standards
• OSTI ID: 5046087
• Journal Information: Instrum. Technol.; (United States), Journal Name: Instrum. Technol.; (United States) Vol. 24:12; ISSN IRTCA
• Country of Publication: United States
• Language: English

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47 OTHER INSTRUMENTATION
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