GOST 11503-74 PDF

Full title and description

GOST 11503-74 — "Petroleum bitumens. Method for determination of assumed (conditional) viscosity". National (Soviet) standard that defines a laboratory method for measuring the conditional viscosity of liquid petroleum bitumens and bituminous raw materials by timing flow through a calibrated orifice at a specified temperature.

Abstract

This standard specifies the apparatus, sample preparation, test conditions and calculation procedure for determining the conditional (assumed) viscosity of petroleum bitumens. The method is based on measuring the time required for a defined volume (or mass) of bitumen to flow through a calibrated hole in a viscometer cylinder at a controlled temperature. The resulting value characterises the flow properties of bituminous products for quality control, specification and process control purposes.

General information

• Status: In force (originally adopted in the USSR; remains a referenced method in later Russian standards and industry practice).
• Publication date: Approved 25 July 1974; Date of introduction (entry into force): 1 January 1976.
• Publisher: State Committee for Standards of the Council of Ministers of the USSR (Gosstandart); developed by the Ministry of Oil Refining and Petrochemical Industry of the USSR.
• ICS / categories: ICS 75.140 — Paraffins, bituminous materials and other petroleum products; Group B49.
• Edition / version: GOST 11503-74 (original standard from 1974). Includes subsequent amendments (changes/editions published later; consolidated/circulated editions and amendments exist — amendments adopted through at least 2001; reprints/editions available through the 2000s).
• Number of pages: Typically published as a short method standard — 4 pages (standard text length commonly listed as 4 pages).

Scope

Applies to liquid petroleum bitumens, feedstocks for bitumen production and similar bituminous products. Establishes a laboratory procedure to determine the conditional (assumed) viscosity which characterises bitumen flow behaviour at a given temperature. The procedure is intended for quality control, acceptance testing and material specification where conditional viscosity is a required parameter.

Key topics and requirements

• Definition of "conditional (assumed) viscosity" for petroleum bitumens and the significance of the measured value for product characterization.
• Description of the required apparatus — viscometer cylinder with calibrated outlet orifice and means for precise temperature control of the test bath.
• Detailed sample preparation and conditioning instructions (heating, homogenization, avoidance of air entrainment) to ensure reproducible flow behaviour.
• Specified test temperature (commonly performed at 25 °C for many bitumen types in practice) and requirements for stabilization before measurement.
• Procedure for measuring flow time of a defined quantity through the calibrated orifice and the mathematical conversion to the conditional viscosity value.
• Requirements for repeatability, number of determinations, rounding and reporting of results.
• References to related normative documents and required auxiliary reagents/equipment.

Typical use and users

Main users are bitumen manufacturers, petroleum refineries, independent testing and quality-control laboratories, suppliers of road and roofing bitumens, research institutes, procurement and inspection authorities, and standards/regulatory bodies involved in specification and acceptance testing of bituminous materials.

Related standards

GOST 11503-74 is associated with and references other technical standards for apparatus, reagents and related test methods. Examples of related documents and cross-references include earlier or parallel GOST methods for bitumen testing and standards covering laboratory apparatus and materials used in testing (for example, standards for sieves/wire cloth, reagents and other bitumen test methods). Later national standards for bituminous products and some modern GOST/R standards reference or incorporate this method for conditional viscosity measurement.

Keywords

GOST 11503-74, petroleum bitumens, bitumen viscosity, conditional viscosity, assumed viscosity, viscometer, flow time, bituminous materials, quality control, laboratory method.

FAQ

Q: What is this standard?

A: GOST 11503-74 is a Soviet national standard titled "Petroleum bitumens. Method for determination of assumed (conditional) viscosity" that defines a laboratory method to measure the conditional viscosity of liquid petroleum bitumens.

Q: What does it cover?

A: It covers the scope of application (liquid petroleum bitumens and related feedstocks), apparatus and calibration requirements, sample preparation, test conditions (temperature control and stabilization), the procedure for measuring flow time through a calibrated orifice, calculation of the conditional viscosity and rules for reporting results.

Q: Who typically uses it?

A: Bitumen producers, refineries, testing and QA/QC laboratories, construction material suppliers (road and roofing bitumens), research organisations and conformity assessment bodies use the method for product control and specification compliance.

Q: Is it current or superseded?

A: The standard was approved on 25 July 1974 and entered into force on 1 January 1976. It has been maintained in national collections and is referenced by later standards and amendments; amendments were adopted following the original issue (changes recorded into the 1990s–2000s). For any contractual or regulatory use today, users should confirm the currently required test method and whether a more recent national or industry standard supersedes or replaces this method.

Q: Is it part of a series?

A: It forms part of the family of GOST methods for testing properties of petroleum bitumens and bituminous materials. There are related GOST methods dealing with penetration, softening point, viscosity by other methods and other bitumen properties; some are cited by or cite GOST 11503-74.

Q: What are the key keywords?

A: Petroleum bitumens, conditional viscosity, assumed viscosity, viscometer, flow time, bituminous materials, quality control, GOST 11503-74.