ISO 14935:2020 PDF

Petroleum and related products — Determination of wick flame persistence of fire-resistant fluids

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Title (English):

ISO 14935:2020

Petroleum and related products — Determination of wick flame persistence of fire-resistant fluids

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 8
Publication date:: April 16, 2020
Edition:: ISO IS 14935 edition 2 version 1
ICS:: 75.080

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Description (English):

This document specifies a method for the assessment of the persistence of a flame applied to the edge of a wick of non-flammable material immersed in fire-resistant fluid. This test does not determine the behaviour of a spray of fire-resistant fluid. NOTE Such test methods are specified in ISO 15029-1 and ISO 15029-2. This document specifies one of four basic tests for determining flammability. This document does not apply to certain liquids such as HFAE and HFAS liquids.

Technical details

Technical committee: ISO/TC 28 - Petroleum and related products, fuels and lubricants from natural or synthetic sources
SKU: ISO 14935:2020

Abstract

Overview

ISO 14935:2020 specifies a standardized laboratory method to assess the persistence of a flame applied to the edge of a non‑flammable wick (aluminosilicate plate) immersed in fire‑resistant fluids. It is one of four basic flammability tests used to characterise fire‑resistant hydraulic and related fluids. The test measures how long a small flame continues on the soaked wick after removal of an igniting flame, and is used to support product specifications, quality control and safety assessment. ISO 14935:2020 does not address spray behaviour and excludes certain liquids (e.g., HFAE and HFAS).

Key topics and technical requirements

Test principle: A non‑flammable aluminosilicate plate is soaked, clamped in a brass reservoir and ignited at the plate edge. After removal of the igniting flame the continued burning time is measured.
Test matrix: Five exposure times (2 s, 5 s, 10 s, 20 s, 30 s); six determinations per exposure time; calculate a mean for each exposure time; report the highest mean as the flame mean persistence.
Apparatus & dimensions (selected requirements from the standard):
- Reservoir: brass, ~200 mm × 25 mm × 20 mm, clamp span 180 mm ± 2 mm.
- Test plate: aluminosilicate, width 25 mm ± 1 mm, thickness 2 mm ± 0.2 mm, length 195 mm ± 5 mm.
- Burner nozzle: 0.6 mm diameter; ignition flame height 25 ± 1 mm; nozzle‑to‑plate distance 6.5 mm ± 0.5 mm.
- Propane fuel (commercial quality per ISO 9162) and a regulated supply.
Conditions & procedure: Tests at 18–22 °C in still air, soak plates ≥10 min, drip‑off time 300 ± 10 s before ignition, complete all five exposure series within 2 hours.
Result expression & pass criterion: Report the largest mean (to 0.1 s) as flame mean persistence. The test is used as a yes/no definition where an average burning time

Related standards

Mentioned in the description and other ISO standards

Overview

Key topics and technical requirements

Test principle: A non‑flammable aluminosilicate plate is soaked, clamped in a brass reservoir and ignited at the plate edge. After removal of the igniting flame the continued burning time is measured.
Test matrix: Five exposure times (2 s, 5 s, 10 s, 20 s, 30 s); six determinations per exposure time; calculate a mean for each exposure time; report the highest mean as the flame mean persistence.
Apparatus & dimensions (selected requirements from the standard):
- Reservoir: brass, ~200 mm × 25 mm × 20 mm, clamp span 180 mm ± 2 mm.
- Test plate: aluminosilicate, width 25 mm ± 1 mm, thickness 2 mm ± 0.2 mm, length 195 mm ± 5 mm.
- Burner nozzle: 0.6 mm diameter; ignition flame height 25 ± 1 mm; nozzle‑to‑plate distance 6.5 mm ± 0.5 mm.
- Propane fuel (commercial quality per ISO 9162) and a regulated supply.
Conditions & procedure: Tests at 18–22 °C in still air, soak plates ≥10 min, drip‑off time 300 ± 10 s before ignition, complete all five exposure series within 2 hours.
Result expression & pass criterion: Report the largest mean (to 0.1 s) as flame mean persistence. The test is used as a yes/no definition where an average burning time

ISO 14935:2020 PDF

Technical details

Abstract

Overview

Key topics and technical requirements

Related standards

Abstract

Overview

Key topics and technical requirements

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