ISO 13909-8:2016 PDF

Name: ISO 13909-8:2016 — Hard coal and coke — Mechanical sampling — Part 8: Methods of testing for bias
SKU: ISO 13909-8:2016
Price: 25 EUR
Availability: InStock

Hard coal and coke — Mechanical sampling — Part 8: Methods of testing for bias

Название (английский):

ISO 13909-8:2016

Hard coal and coke — Mechanical sampling — Part 8: Methods of testing for bias

Статус документа:: Отменён
Формат:: Электронный (PDF)
Количество страниц:: 28
Дата публикации:: 23 июня 2016 г.
Издание:: ISO IS 13909 edition 2 version 1
ICS:: 73.040

Тип поставки:

Full version420 €Read online 24h10 €Read online 72h15 €

Язык документа:

ruen

Срок поставки:5 раб. дн. (перевод)

Цена:420 €

Описание (английский):

ISO 13909-8:2016 sets out principles and procedures for testing the bias of test samples of hard coals or cokes, taken in accordance with ISO 13909: 2016 (all parts). NOTE In the text, the term "fuel" is used where both coal and coke would be applicable in the context and either "coal" or "coke" where only one is applicable.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 13909-8:2016 - "Hard coal and coke - Mechanical sampling - Part 8: Methods of testing for bias" defines principles and procedures for testing sampling bias of test samples of hard coal or coke taken in accordance with the ISO 13909 series. The standard specifies how to plan, conduct and analyse bias tests so that mechanical sampling systems reliably represent the feedstock for key analytical parameters (notably moisture and ash on a dry basis).

Key topics and requirements

Scope and terminology: Applies to samples of hard coal and coke; the term fuel is used where appropriate to cover both.

Pre-test inspection: A thorough inspection of the sampling system (see ISO 21398) is required before bias testing to identify system deficiencies that could introduce bias.

Reference methods and paired design:

Bias testing compares system samples with reference samples taken from a stopped belt or other reference method.
Two common experimental designs: paired-increment (individual primary increments paired) and paired-batch (compounded increments paired). Paired-batch is preferred to minimize operational disruption.

Parameters to test: The standard recommends at minimum moisture and ash (dry basis); additional variables may be included but can reduce statistical sensitivity.

Sample size: Minimum 30 paired samples is recommended; fewer may be acceptable if bias is detected. Statistical confidence regions guide whether more samples are needed.

Sample handling and preparation: Detailed protocols for collection, weighing, preparation and transport are required to avoid introducing bias-special precautions for moisture samples to prevent moisture change.

Statistical analysis and reporting: Differences between paired results are subjected to statistical analysis; calculations, interpretation and a formal test report are required. The standard includes example calculations and documentation requirements.

Applications and users

ISO 13909-8:2016 is used to:

Validate and verify mechanical sampling systems in coal mines, coke plants, power stations and fuel terminals.

Diagnose and quantify sampling bias that affects contractual quality (ash, moisture) and laboratory results.

Support quality assurance, regulatory compliance and dispute resolution where representative sampling is critical.

Typical users:

Sampling engineers and laboratory managers

QA/QC professionals in coal/coke supply chains

Plant operators, power utilities and coke producers

Standards bodies and auditors

Related standards

ISO 13909-1, -2, -4, -5, -6, -7 (other parts of the mechanical sampling series)

ISO 21398:2007 (Guide to inspection of mechanical sampling systems)

Keywords: ISO 13909-8:2016, mechanical sampling, hard coal, coke, sampling bias, paired samples, reference method, moisture testing, ash content, statistical analysis.

ISO 13909-8:2016 PDF

Abstract

Похожие стандарты

Overview

Key topics and requirements

Applications and users

Related standards

Технические детали

ISO 21398:2007

Hard coal and coke — Guidance to the inspection of mechanical sampling systems

BS ISO 13909-2:2025

Coal and coke. Mechanical sampling. Sampling of coal from moving streams.

BS ISO 21398:2007

Hard coal and coke. Guidance to the inspection of mechanical sampling systems

ISO 13909-1:2001

Hard coal and coke — Mechanical sampling — Part 1: General introduction