GOST 28656-2019 PDF

Full title and description

GOST 28656-2019 — "Liquefied hydrocarbon gases. Calculation method for determination of saturated vapour density and pressure" (Russian: ГОСТ 28656-2019, «Газы углеводородные сжиженные. Расчетный метод определения плотности и давления насыщенных паров»). The standard specifies a calculation procedure for saturated vapour density and saturated vapour pressure of liquefied hydrocarbon gases and their mixtures.

Abstract

This interstate (GOST) standard establishes a simplified, calculation-based method — using measured hydrocarbon composition (typically from gas chromatography) — to determine saturated vapour density and saturated vapour (equilibrium) pressure for liquefied hydrocarbon gases such as propane, propene, butanes, butenes and their mixtures. The procedure includes tabulated component data, calculation formulas and example appendices illustrating density and vapour‑pressure computations over practical temperature ranges.

General information

• Status: In force (active national/interstate standard).
• Publication date: Adopted 2019; introduced into effect as a national standard of the Russian Federation on 1 January 2020.
• Publisher: Adopted and put into effect by the Federal Agency for Technical Regulation and Metrology (Rosstandart) as an interstate standard developed under MTC 52; developed by VNIIVUS (Volzhsky Research Institute of Hydrocarbon Raw Materials).
• ICS / categories: 75.160.30 (Fuels — gaseous fuels / liquefied petroleum gases).
• Edition / version: GOST 28656-2019 (first edition 2019; introduced 01.01.2020).
• Number of pages: 24 pages (standard text).

Scope

The standard applies to liquefied hydrocarbon gases (propane, propene, butanes, butenes and their mixtures) used as motor fuel, process fuel, domestic/commercial fuel or as feedstock in chemical processes. It provides a calculation method for determining saturated vapour density and saturated vapour pressure based on measured component composition (e.g., gas chromatographic analysis) and is intended for compositions with component mass fractions ranging roughly from 0.01% to 99.80%. The document replaces the earlier GOST 28656-90.

Key topics and requirements

• Definition of scope, terms and symbols used for saturated vapour density and vapour pressure calculations.
• Required input data: component composition by mass or mole fraction (typically from gas chromatography).
• Calculation algorithms and formulas for converting composition data into saturated vapour density and pressure values.
• Tabulated physical properties (component densities, molar masses, reference parameters) used in the calculation procedure.
• Worked examples and recommended appendices demonstrating density and vapour‑pressure computations across temperature ranges.
• Notes on applicability limits, accuracy expectations and handling of minor/trace components in mixtures.
• References to related measurement standards and amendments incorporated after initial publication.

Typical use and users

Primary users are laboratories, petrochemical and gas-processing enterprises, fuel suppliers and quality-control services that analyse liquefied hydrocarbon fuels and need to report or calculate saturated vapour density and vapour pressure from composition data. The standard is also used by engineers and technologists involved in storage, transport and safety assessments of LPG and related mixtures, and by regulatory bodies for conformity assessment and reporting.

Related standards

Documents commonly referenced alongside GOST 28656-2019 include the earlier version GOST 28656-90 (superseded), standards on sampling and composition determination for liquefied gases (for example GOST 14921 series and standards on gas‑chromatographic determination of composition), methods for direct vapour‑pressure measurement (e.g., GOST 34429 and GOST ISO 4256 series), and other national/international LPG test and handling standards.

Keywords

liquefied hydrocarbon gases; LPG; saturated vapour density; saturated vapour pressure; calculation method; gas chromatography; fuel composition; propane; butane; propene; vapour pressure calculation.

FAQ

Q: What is this standard?

A: GOST 28656-2019 is an interstate (GOST) technical standard that specifies a calculation method to determine saturated vapour density and saturated vapour pressure for liquefied hydrocarbon gases and their mixtures.

Q: What does it cover?

A: It covers the inputs (composition data, typically from gas chromatography), required physical property tables and the calculation algorithms to compute saturated vapour density and vapour pressure for LPG components and mixtures, plus examples and applicability limits.

Q: Who typically uses it?

A: Analytical laboratories, fuel suppliers, gas and petrochemical facilities, safety and regulatory personnel, and engineers responsible for storage, transport and processing of liquefied hydrocarbon gases.

Q: Is it current or superseded?

A: Current — GOST 28656-2019 was adopted in 2019 and introduced into effect as a national standard of the Russian Federation on 1 January 2020; it replaces GOST 28656-90. The text has received subsequent amendments published in informational indexes (amendments recorded after adoption).

Q: Is it part of a series?

A: It is part of the fuels / gaseous fuels group of standards (ICS 75.160.30) and is typically used together with related standards on sampling, chromatographic analysis of composition and direct vapour‑pressure measurement methods.

Q: What are the key keywords?

A: Liquefied hydrocarbon gases, LPG, saturated vapour density, saturated vapour pressure, calculation method, gas chromatography, propane, butane, propene.