ISO 6964:2019 PDF

Name: ISO 6964:2019 — Polyolefin pipes and fittings — Determination of carbon black content by calcination and pyrolysis — Test method
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Polyolefin pipes and fittings — Determination of carbon black content by calcination and pyrolysis — Test method

Название (английский):

ISO 6964:2019

Polyolefin pipes and fittings — Determination of carbon black content by calcination and pyrolysis — Test method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 13
Дата публикации:: 27 февраля 2019 г.
Издание:: ISO IS 6964 edition 2 version 1
ICS:: 23.040.20

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Описание (английский):

This document specifies test methods for the determination of the carbon black content of polyolefin compositions used in particular for the manufacture of pipes and fittings, and provides a basic specification for polyethylene pipes and fittings. This document applies equally to the material for manufacture and to any material taken from a pipe or fitting.

Abstract

Похожие стандарты

Упомянутые в описании и другие стандарты ISO

Overview

ISO 6964:2019 specifies standardized test methods for determining carbon black content in polyolefin compositions used for pipes and fittings, and provides a basic specification framework for polyethylene pipes and fittings. The standard applies both to raw material intended for manufacture and to samples taken from finished pipes or fittings. Carbon black content is measured by a combination of pyrolysis and calcination and reported as a percentage by mass.

Key topics and technical requirements

Test principles: Carbon black content is calculated from the difference in mass before and after pyrolysis (inert atmosphere) and calcination (oxidizing atmosphere).

Three validated methods:

Method A - Electrical tube furnace: Pyrolysis at (550 ± 50) °C in nitrogen for 45 min followed by calcination at (900 ± 25) °C.
Method B - Muffle furnace:
- B1 (conventional): Pyrolysis ramp from (325 ± 25) °C to (550 ± 25) °C at 15 °C/min, hold at 550 °C for (10 ± 0,5) min, then calcination at 900 °C.
- B2 (microwave): Pyrolysis at (520 ± 25) °C for (10 ± 0,5) min, then calcination at 900 °C.
Method C - Thermogravimetric analyzer (TGA): Controlled-rate pyrolysis under inert gas up to 800 °C followed by oxidation at 900 °C.

Sampling and repeatability: Three test portions are taken, and the arithmetic mean is reported rounded to two significant figures.

Important notes:

Carbon black decomposes in air/oxygen from about 500 °C - loss between 500 °C and 700 °C corresponds to carbon black decomposition.
Presence of inorganic additives (e.g., calcium carbonate) can increase ash and lead to overestimation of carbon black; ash yields >1% may require further investigation.

Reference standard: ISO 11358-1 (Thermogravimetry of polymers) is cited for TGA principles.

Applications

Quality control and incoming material inspection for polyolefin and polyethylene pipe manufacturers.

Product specification and certification to demonstrate compliance with material composition requirements.

Failure analysis and forensic testing where carbon black content affects UV protection, thermal properties, or mechanical performance.

R&D and formulation control for compounding and additive optimization in pipe grades.

ISO 6964:2019 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications

Who uses this standard

Related standards

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