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GB4820-2013
Sawn timber for shaft lifting guide
罐道木
GB 4820-2013 — действующий обязательный национальный стандарт Китая: Sawn timber for shaft lifting guide. Отрасль: Машины. Тема: Безопасность продукции. Дата вступления в силу: 11 сент. 2014 г..
Применимость зависит от продукции, схемы сертификации, уведомлений компетентных органов и переходных правил. Закажите перевод или проверьте источник, прежде чем использовать эту запись в решениях по соответствию.
Обзор требований
Этот обзор пока доступен только на английском языке.
Область применения
This standard applies to sawn timber for shaft lifting guides (罐道木) specifically used in mine shafts. It is not applicable to general construction timber or other industrial wood products. It is essential for manufacturers and suppliers providing wood materials for mining operations in China.
Технические требования
This standard specifies the technical requirements for sawn timber for shaft lifting guides (罐道木), including tree species, dimensions, tolerances, and defect limits. Clause 3.4 regarding defect limits is mandatory, while other clauses are recommended. The standard specifies seven tree species, including Abies spp., Picea spp., and Pinus koraiensis, with Latin names provided for clarity. Dimensional requirements include lengths of 6m or 8m, and minimum widths and thicknesses of 210mm, with specific tolerances for length and cross-section. The standard also defines strict defect limits for knots, decay, insect holes, bending, cracks, and blunt edges. Compared to the previous version, the standard expands the applicable tree species and tightens the allowable limits for knots and insect holes.
Методы испытаний
The standard outlines testing and evaluation procedures, including sampling methods, dimensional measurement, and material quality assessment. Sampling is conducted according to GB/T 17659.2, while dimensional inspection and material quality evaluation follow GB/T 4822. Volume calculation is performed according to GB/T 449. These procedures ensure consistent quality control and compliance verification for the sawn timber.
Частые вопросы
What products are regulated under GB 4820-2013?
GB 4820-2013 applies to sawn timber for shaft lifting guides (罐道木), which is specifically used in mine shafts.
Are there any updates from the previous version of GB 4820-2013?
Yes, compared to GB 4820-1995, the updated standard expands the applicable tree species from 6 to 7, adds Latin names, tightens the allowable limits for knots and insect holes, and includes new sampling methods.
Is GB 4820-2013 mandatory?
Clause 3.4 regarding defect limits is mandatory, while the remaining clauses are recommended.
The summary above provides a high-level overview of GB 4820-2013. To ensure complete compliance for your products entering the Chinese market, a precise and professional translation of the full technical specifications is essential. Purchase our high-quality English translation of GB 4820-2013 today to access all detailed parameters, tables, and testing procedures.
Подсказки по применимости
- Тип
- Продукция
- CCS
- B68
- ICS
- 79.040
- Компетентное ведомство
- National Forestry and Grassland Administration
- Технический комитет
- National Technical Committee on Timber of Standardization Administration of China
Связи
Заменяет:GB 4820-1995