Tiêu chuẩn quốc tế
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Số hiệu
Standard Number
ISO 4589-4:2021
Năm ban hành 2021
Publication date
Tình trạng
A - Còn hiệu lực
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Tên tiếng Anh
Title in English Plastics — Determination of burning behaviour by oxygen index — Part 4: High gas velocity test
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Chỉ số phân loại Quốc tế (ICS)
By field |
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Số trang
Page 36
Giá:
Price Liên hệ / Contact us
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Phạm vi áp dụng
Scope of standard This document specifies a test method for determining the minimum volume fraction of oxygen, in admixture with nitrogen, at ambient temperature, that supports combustion of small vertical sheet test specimen under a specified gas velocity that is higher than that specified in ISO 4589-2. NOTE The result is expressed as a high gas velocity oxygen index (HOI). In addition, this document specifies the testing apparatus for determining the HOI. The test method is applicable to materials in the form of sheets up to 2 mm thick. It is also applicable to flexible sheet materials that are supported vertically by a specified specimen holder. |