BS EN ISO 3993:1996 Liquefied petroleum gas and light hydrocarbons. Determination of density or relative density. Pressure hydrometer method
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BS EN ISO 3993:1996 is a European Standard that specifies a method for the determination of the density or relative density of liquefied petroleum gas (LPG) and light hydrocarbons using a pressure hydrometer. This standard provides guidelines for measuring the density of these substances under specific conditions using this particular method.
Here's a breakdown of the key components of this standard:
Scope: This standard applies to the determination of the density or relative density of LPG and light hydrocarbons using a pressure hydrometer. It provides details on the necessary equipment, procedures, and calculations involved in the measurement.
Pressure Hydrometer Method: The pressure hydrometer method involves using a hydrometer that operates under pressure. This is particularly useful for determining the density of substances that are in the liquid state under normal conditions but are in the gaseous state when measured at atmospheric pressure.
Apparatus: The standard outlines the necessary apparatus required for the measurement, including the pressure hydrometer, a pressure cell, a thermometer, and a reference system for calibration.
Procedure: The standard details the step-by-step procedure for performing the measurement. This includes preparing the sample, calibrating the equipment, introducing the sample into the pressure cell, and recording the measurements.
Calculation: The standard provides the necessary calculations to convert the observed measurements to the desired density or relative density values.
Precision: Information on the precision of the method, including repeatability and reproducibility, is often included in such standards. This helps users understand the level of accuracy and reliability of the method.
It's important to note that standards like BS EN ISO 3993:1996 provide a consistent and standardized approach to measuring properties like density. This is crucial in industries such as petrochemicals, where accurate measurements of properties are essential for quality control, safety, and compliance with regulations.
Keep in mind that standards can be updated or revised over time to reflect advances in technology and changes in industry practices. If you are using this standard for a specific purpose, it's a good idea to ensure you have access to the most current version and any related amendments.
