International Quality Assurance Exchange Program Participant Guide
Section 2.1 - Receiving
Upon receipt of fuel exchange test samples, first examine the sample containers for leaks. Loose caps are responsible for the majority of vapour leaks, therefore the container should be turned upside down and examined for leakage. Liquid leaks can occur at the seams, at points where the container has been damaged, or at pinholes caused by corrosion, and may be accompanied by dye stains.
The test sample volume, as determined by use of a suitable gauge, shall equal 70 to 80% of the container capacity. Discard the sample if its volume is less than 70% of the container capacity. If the container is more than 80% full, pour out enough sample to bring the container contents within the 70 to 80% range. Under no circumstance may any sample poured out be returned to the container.
Upon receipt of LPG exchange test samples, first examine the sample cylinder for leaks. The test sample volume, as determined by use of a suitable ullage tube, shall equal 80% of the container capacity.
The 80% fill weight of each cylinder is recorded on the sample tag. Weighing the cylinder when received may help determine if the sample cylinder leaked.
It is essential that any evidence of leakage be reported to the exchange coordinator so a replacement test sample can be dispatched.
Section 2.2 - Sample Handling
The extreme sensitivity of measurements to losses through evaporation and the resulting changes in composition is such as to require the utmost precaution and the most meticulous care in the handling of test samples.
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