ISO 10397:1993 PDF

Name: ISO 10397:1993 — Stationary source emissions — Determination of asbestos plant emissions — Method by fibre count measurement
SKU: ISO 10397:1993
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Stationary source emissions — Determination of asbestos plant emissions — Method by fibre count measurement

Название (английский):

ISO 10397:1993

Stationary source emissions — Determination of asbestos plant emissions — Method by fibre count measurement

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 19
Дата публикации:: 22 июля 1993 г.
Издание:: ISO IS 10397 edition 1 version 1
ICS:: 13.040.40

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Описание (английский):

The principle of the method specified is isokinetically withdrawing a known volume from a moving gas stream, passing the sampled gas through a filter medium to remove particulate matter (including fibres), treating the filter to make it transparent when viewed under a microscope and counting the number of fibres in a precise number of fields viewed using a phase-contrast optical microscope. The method may be used to determine fibre concentrations in flowing gas streams in ducts, chimneys, or flues from a wide range of industrial processes.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 10397:1993 specifies a standardized fibre count method for assessing asbestos emissions from stationary sources (ducts, chimneys, flues). The method uses isokinetic sampling to withdraw a known volume of gas through a filter, makes the filter transparent, and counts fibres by phase-contrast optical microscopy. It is intended to quantify fibre concentrations and to evaluate the effectiveness of dust- and fibre-collection equipment at asbestos works or other processes handling fibrous materials.

Key topics and technical requirements

Isokinetic sampling: withdraw gas at a rate matching the duct gas velocity so sampled particles represent the flow. The standard covers nozzle size, sampling rate, and validation of isokinetic conditions.

Sampling train and apparatus: probe with nozzle and fibre collector, pump (fan/vacuum), flow and temperature measurement (Pitot-static tube referenced), and filters with known effective filtering area.

Filter treatment and analysis: procedures to clear the membrane filter and view it under a phase-contrast optical microscope for fibre counting; analytical technique follows ISO 8672.

Definition of fibres: the standard defines “regulated” fibres by size and aspect ratio (see clause 3.9) to be included in counts.

Calculation and presentation: formulas for gas velocity, sampled air volume, validation of isokinetic sampling, and fibre concentration calculations; guidance on presenting and interpreting results.

Accuracy and limitations: notes that analytical (counting) accuracy strongly affects overall method accuracy; small sampling durations can be sensitive to process fluctuations.

Health & safety: requirements to assess hazards (asbestos exposure, working at heights, hot/pressurized gases) and to follow site safety procedures.

Practical applications

Compliance monitoring: measuring asbestos fibre concentrations in emissions to verify regulatory limits or permit conditions.

Performance testing: assessing efficiency of baghouses, filters, precipitators, and other dust/fibre arrestment systems at asbestos-processing plants.

Process control and troubleshooting: identifying emission spikes and locating ineffective capture points.

Environmental and occupational hygiene investigations: provides quantitative data for exposure assessments at plant exhaust points (not for workplace personal sampling).

Related standards

ISO 8672 - fibre counting by phase-contrast optical microscopy

ISO 10312 - fibre identification (electron microscopy) when identification of asbestos vs. non‑asbestos fibres is required

ISO 3966, ISO 9096 - flow measurement and mass-concentration methods referenced for duct velocity and mass flow calculations

Keywords: ISO 10397, asbestos emissions, fibre count measurement, isokinetic sampling, phase-contrast optical microscope, stationary source emissions, duct sampling, air quality.

ISO 10397:1993 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Practical applications

Who uses this standard

Related standards

Технические детали

SIST ISO 8672:2015

Air quality - Determination of the number concentration of airborne inorganic fibres by phase contrast optica…

BS ISO 10312:2019

Ambient air. Determination of asbestos fibres. Direct transfer transmission electron microscopy method.

ISO 3966:1977

Measurement of fluid flow in closed conduits — Velocity area method using Pitot static tubes

SIST ISO 9096:2018

Stationary source emissions - Manual determination of mass concentration of particulate matter

SIST ISO 10397:1996

Stationary source emissions -- Determination of asbestos plant emissions -- Method by fibre count measurement