ISO 4263-1:2003 PDF

Petroleum and related products — Determination of the ageing behaviour of inhibited oils and fluids — TOST test — Part 1: Procedure for mineral oils

Название (английский):

ISO 4263-1:2003

Petroleum and related products — Determination of the ageing behaviour of inhibited oils and fluids — TOST test — Part 1: Procedure for mineral oils

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 17
Дата публикации:: 1 апреля 2003 г.
Издание:: ISO IS 4263 edition 1 version 1
ICS:: 75.100

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Описание (английский):

ISO 4263-1:2003 specifies a method for the determination of the ageing behaviour of rust- and oxidation- inhibited mineral oils having a density less than that of water, used as turbine oils (categories TSA, TGA, TSE, TGE of ISO 6743-5, hydraulic oils (categories HL, HM, HR, HV, HG of ISO 6743-4), and circulating oils (category CKB of ISO 6743-6). Oils containing synthetic components can be tested by this procedure, but no precision statement is available yet for such fluids. This test method is widely used in specifications and is considered of value in comparing the oxidation stability of oils that are prone to contamination with water. However, because of the large number of individual field service applications, the correlation between the results of this test and actual service performance can vary markedly, and is best judged on experience.

Технические детали

Технический комитет: ISO/TC 28 - Petroleum and related products, fuels and lubricants from natural or synthetic sources
SKU: ISO 4263-1:2003

Abstract

Overview

ISO 4263-1:2003 specifies the TOST test (Turbine Oil Stability Test) procedure for mineral oils to determine the ageing behaviour of rust- and oxidation‑inhibited oils and fluids. The standard is aimed at mineral‑based turbine oils, hydraulic oils and circulating oils (categories defined by ISO 6743 series). The method evaluates oxidation stability by ageing a test portion at elevated temperature with oxygen, water and a steel/copper catalyst coil and monitoring the increase in acid number until a defined endpoint (oxidation life) is reached.

Key topics and technical requirements

Test principle: Age the oil sample at 95 °C in the dark with a controlled oxygen flow, water and a steel/copper catalyst coil; remove aliquots at intervals and measure acid number.
Oxidation life endpoint: Test continues until acid number reaches 2.0 mg KOH/g; hours elapsed are reported as oxidation life.
Apparatus & materials: Borosilicate oxidation cell, thermostatically controlled heating bath (95 °C ± 0.2 °C), oxygen supply (≥99.5 %), flowmeter, catalyst coils manufactured from specified steel and copper wire diameters, sampling syringes and dark aliquot vials.
Catalyst coil preparation & storage: Clean, abrade and wind specified lengths of steel and copper wire into a double spiral; store coils in a dry inert atmosphere per Annex B.
Analytical methods: Acid number measurement per referenced ISO titration methods; water quality and solvent purity requirements referenced (e.g., ISO 3696 for water).
Precision & limitations: Precision was established for inhibited turbine oils (oxidation lives 700–3 900 h). Oils with synthetic components can be tested but no precision statement is available yet. The test is valuable for oils prone to water contamination but correlation with field performance varies by application.
Safety considerations: Use of oxygen, acids and cleaning agents can be hazardous; appropriate safety and disposal procedures are required.

Applications and users

Quality control laboratories in lubricant manufacturing for batch acceptance and shelf-life comparison.
Specification writers and procurement teams who need comparative oxidation-stability data for turbine, hydraulic and circulating mineral oils.
R&D and formulation teams evaluating antioxidant packages and water-sensitive oxidation performance.
Maintenance and reliability engineers / OEMs using oxidation-life data to inform oil change intervals-while recognizing field correlation depends on service conditions.

Related standards

ISO 6743‑4, ISO 6743‑5, ISO 6743‑6 (lubricant category definitions)
ISO 3170 (sampling), ISO 3696 (laboratory water), ISO 6618 / 6619 / 7537 (acid number / neutralization titration methods)

Keywords: ISO 4263-1:2003, TOST test, oxidation stability, inhibited mineral oils, turbine oils, hydraulic oils, acid number, catalyst coil, lubrication testing.

Overview

Key topics and technical requirements

Test principle: Age the oil sample at 95 °C in the dark with a controlled oxygen flow, water and a steel/copper catalyst coil; remove aliquots at intervals and measure acid number.
Oxidation life endpoint: Test continues until acid number reaches 2.0 mg KOH/g; hours elapsed are reported as oxidation life.
Apparatus & materials: Borosilicate oxidation cell, thermostatically controlled heating bath (95 °C ± 0.2 °C), oxygen supply (≥99.5 %), flowmeter, catalyst coils manufactured from specified steel and copper wire diameters, sampling syringes and dark aliquot vials.
Catalyst coil preparation & storage: Clean, abrade and wind specified lengths of steel and copper wire into a double spiral; store coils in a dry inert atmosphere per Annex B.
Analytical methods: Acid number measurement per referenced ISO titration methods; water quality and solvent purity requirements referenced (e.g., ISO 3696 for water).
Precision & limitations: Precision was established for inhibited turbine oils (oxidation lives 700–3 900 h). Oils with synthetic components can be tested but no precision statement is available yet. The test is valuable for oils prone to water contamination but correlation with field performance varies by application.
Safety considerations: Use of oxygen, acids and cleaning agents can be hazardous; appropriate safety and disposal procedures are required.

Applications and users

Quality control laboratories in lubricant manufacturing for batch acceptance and shelf-life comparison.
Specification writers and procurement teams who need comparative oxidation-stability data for turbine, hydraulic and circulating mineral oils.
R&D and formulation teams evaluating antioxidant packages and water-sensitive oxidation performance.
Maintenance and reliability engineers / OEMs using oxidation-life data to inform oil change intervals-while recognizing field correlation depends on service conditions.

Related standards

ISO 6743‑4, ISO 6743‑5, ISO 6743‑6 (lubricant category definitions)
ISO 3170 (sampling), ISO 3696 (laboratory water), ISO 6618 / 6619 / 7537 (acid number / neutralization titration methods)

Keywords: ISO 4263-1:2003, TOST test, oxidation stability, inhibited mineral oils, turbine oils, hydraulic oils, acid number, catalyst coil, lubrication testing.

ISO 4263-1:2003 PDF

Технические детали

Abstract

Overview

Key topics and technical requirements

Applications and users

Related standards

Похожие стандарты

Abstract

Overview

Key topics and technical requirements

Applications and users

Related standards

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