GOST 1532-81 PDF

Full title and description

GOST 1532-81 — Вискозиметры для определения условной вязкости. Технические условия (GOST 1532-81 — Viscosimeters for determination of conditional (relative) viscosity. Specifications). The standard defines types, basic parameters, technical requirements, test methods, marking, packaging, storage and manufacturer guarantees for viscometers intended to determine conditional (relative) viscosity of liquid media (including instruments made for domestic use and for export).

Abstract

This standard sets mandatory technical specifications for laboratory viscometers used to determine conditional (relative/efflux) viscosity of liquids that produce a continuous stream during testing. It covers mechanical and material requirements, environmental operating conditions, calibration/constant requirements, inspection and periodic test regimes, and requirements for documentation, marking, packaging and transport. The standard was approved by the USSR State Committee for Standards and introduced for use at the start of 1982.

General information

• Status: In force / active (действует) — remains listed in national standard collections with implemented amendments noted.
• Publication date: Introduced 01 January 1982 (approved 02 April 1981).
• Publisher: USSR State Committee for Standards (Gosstandart) / Издательство стандартов (State Standards publishing bodies).
• ICS / categories: 17.060 — Measurement of volume, mass, density, viscosity (Metrology and measurement; physical phenomena).
• Edition / version: Designation GOST 1532-81 (original 1981/1982 edition). Includes recorded amendments (examples: amendments issued in 1986 and 1988 in later updates to the text).
• Number of pages: Approximately 14 pages (published technical specification length typical for GOST TUs of this type).

Key bibliographic and status details are recorded in Russian standards catalogues and commercial standards distributors.

Scope

The standard applies to viscometers intended for determining conditional (efflux/relative) viscosity of liquid media that form a continuous jet for the duration of the test (tests carried out in accordance with related viscosity test methods such as those referenced in the standard). It is intended for instruments manufactured for use in industry, scientific and calibration laboratories, quality control and for export. The scope includes specification of types, main parameters and dimensions, technical requirements, completeness, acceptance and periodic testing procedures, methods of testing, and marking/packaging/transport and storage requirements.

Key topics and requirements

• Types, main parameters and dimensional requirements for viscometers intended for conditional (relative) viscosity measurement.
• Operating environmental conditions: ambient temperature range and humidity limits (typical operational requirement 10 °C — 35 °C and relative humidity up to 80% under non-vibrational conditions as given for instruments of this class).
• Calibration / viscometer constant: example requirement — the viscometer constant (efflux time for 200 cm³ distilled water at 20 °C) specified as 51 ± 1 s, with repeatability/precision limits for repeated determinations described in the standard.
• Material and surface-finish requirements for flow (drain) tube and reservoir (stainless steel for the drain tube, specified roughness ranges for inner surfaces) and anti‑corrosion protection of metallic parts.
• Acceptance, periodic and control testing rules: acceptance tests on each instrument, periodic tests at defined intervals, and control test regimes (including rules for repeating tests in case of nonconformity).
• Requirements for marking, packaging, transport and storage, plus manufacturer guarantees and documentation (passport/data sheet, calibration/certificate guidance).

Representative technical values and test/inspection procedures are specified in the standard text and in its amendments.

Typical use and users

Primary users are calibration and testing laboratories, industrial quality-control laboratories (petroleum, paints & coatings, polymers, chemicals), equipment manufacturers and metrology services. The viscometers covered by this standard are used for batch quality control, product specification testing, R&D sample characterisation and metrological calibration checks where conditional/relative viscosity (efflux time) is a required parameter.

Related standards

GOST 1532-81 references and coexists with related normative documents used for materials and testing conditions, for example national standards on viscosity test methods and instrument design or materials (examples referenced within the GOST text include standards on viscosity test procedures, stainless-steel grades for flow tubes, surface roughness measurement and environmental/operating categories). Internationally, methods such as ISO flow-cup standards and rotational viscometer standards cover overlapping measurement domains (ISO/ASTM methods for viscosity and flow cups are commonly used complements).

Keywords

GOST 1532-81; viscometer; viscosimeter; conditional viscosity; relative viscosity; efflux time; Engler/flow viscometer; metrology; calibration; viscosity measurement.

FAQ

Q: What is this standard?

A: GOST 1532-81 is a Soviet / interstate technical specification that sets requirements for viscometers used to determine conditional (relative/efflux) viscosity of liquids, including construction, materials, calibration constant, test and acceptance procedures, and handling/packaging rules.

Q: What does it cover?

A: It covers types and dimensions, technical requirements and tolerances, operating conditions, manufacturer documentation and guarantees, methods of acceptance and periodic testing, marking, packaging, transport and storage for viscometers intended to measure conditional viscosity. The text also includes normative references to related material and metrology standards.

Q: Who typically uses it?

A: Testing and calibration laboratories, quality control departments in industries such as petroleum, paints and coatings, chemicals and polymers, equipment manufacturers and national/regional metrology bodies. The standard is used where measurement of conditional viscosity (efflux time) is required for specification or quality control.

Q: Is it current or superseded?

A: Catalogues and standards databases list GOST 1532-81 as an issued 1981/1982 standard with later amendments recorded; it is commonly shown as in force in national collections (with amendments). Users should verify the current legal/applicability status in their jurisdiction or with the national standards body before relying on it for regulatory compliance.

Q: Is it part of a series?

A: It belongs functionally to the family of metrology and measurement standards governing viscosity and fluid properties (ICS 17.060) and is often used together with other GOSTs that specify related test methods, materials and environmental/operating categories.

Q: What are the key keywords?

A: Viscometer, viscosimeter, conditional viscosity, relative viscosity, efflux time, calibration constant, metrology, GOST 1532-81.