How accurate is the Shipboard Custody Transfer Measurement system? An independent research by SGS. (eBook)

Published Date

January 2005

How accurate is the Shipboard Custody Transfer Measurement system? An independent research by SGS. (eBook)

$19.45
(Excludes any applicable taxes)

This paper reviews the accuracy of transfer measurement in an aim to improve on current cargo value uncertainties. (10pp)

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LNG is presently shipped in vessels with an average capacity of 138000 m³, containing about 64000 tons of liquid product and expressed in energy terms it contains about 3200000 MMBTU's. The full load of one shipment represents a cargo value of about 21 million US$, or 16 million Euro .In case of the trade of normal liquids, like oils, chemicals, etc, the highest accuracy or precision measurement experts hope to reach varies between 0.2 to 0.3 % accuracy. If we could consider this as the overall accuracy of an LNG transfer then these 'high' precision levels are still representing a cargo value uncertainty of about $43500– 65300.This is regarded as the best that can be achieved using present measurement techniques.

Systematic errors, built into the system, higher than these 'ideal' values (e.g. 0.5 %) can lead to yearly revenue losses of more than 3,3 million US$, considering that a normal LNG carrier can do some 30 voyages per year.

Spurious errors or obvious mistakes can even result in higher inaccuracies and consequently be the cause of more considerable cargo losses and subsequent claims.

Paper Delivered by:
Gerrit Vermeiren (SGS)
Sven Lataire (SGS)

Prepared for:

Gastech Bilbao 2005

Title: How accurate is the Shipboard Custody Transfer Measurement system? An independent research by SGS. (eBook)
Product Code: 4433g087
Published Date: January 2005

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