Officially, Canada uses the metric system of measurement (litres, kilograms, metres, etc.), since converting from the imperial system (gallons, pounds, inches, etc.) in the 1970s. However, as you probably have experienced, there is significant variation
in the use of the two systems—by industry sector and amongst individuals—to the extent that it is not uncommon to see or hear one or the other, or even both systems used. The United States follows the imperial measurement system. Most other countries
use the metric system.

Volume

Natural gas is typically measured by volume. The amount of energy in natural gas is proportional to the number of molecules in the gas, and the number of molecules in the gas changes under different temperatures and pressures; hence, the amount of energy in natural gas varies by volume depending on the temperature and level of pressure the gas is stored under.

Measuring volume
To ensure fair and accurate measuring of natural gas for the purposes of buying and selling, the standards for measurement are set by government—in Canada, the federal government.

In Canada, when natural gas is produced, transported, bought, or sold, the volumes are reported in metric units of cubic metres or metric tons. However, you may frequently see or hear volumes reported in imperial units of measurement (most often in news reports) such as cubic feet, barrels, and Btu.

For everyday consumption, cubic metres are far too large for measuring natural gas. For example, gasoline, diesel fuel, and other liquefied fuels are most often measured in litres. For reference, 1,000 litres = 1 cubic metre.

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Measurement Canada

Did you know that there is an entire federal government department responsible for setting standards for measurements?

Measurement Canada is responsible for ensuring that businesses and consumers receive fair and accurate measure in financial transactions involving goods and services. The agency develops and administers the laws and requirements governing measurement; evaluates, approves and certifies measuring devices; and investigates complaints of suspected inaccurate measurement.

Check it out at https://www.ic.gc.ca/eic/site/mc-mc.nsf/eng/h_lm00013.html

 

Video 1: Exploding Water Heater (4 minutes 12 seconds)

Learning Activity 1: Water and Pressure

Instructions 1. Watch Video 1 and answer the following questions.

    a) What was the water heater operating pressure? b) What was the pressure at the explosion time? c) What do you think will happen with the drilling pipes if pressure escapes the hole?

Comment: All water heaters have a pressure relief valve installed which prevents over pressuring of the water heater and subsequent explosions.