GB4820-2013

Sawn timber for shaft lifting guide

罐道木

GB 4820-2013 é uma norma nacional chinesa obrigatória vigente: Sawn timber for shaft lifting guide. Setor: Máquinas. Foco: Segurança de produtos. Entrada em vigor: 11 de set. de 2014.

A aplicabilidade depende do escopo do produto, da via de certificação, dos avisos da autoridade competente e das regras de transição. Solicite uma tradução ou verifique a fonte antes de usar este registro em uma decisão de conformidade.

Visão geral de conformidade

Esta visão geral está disponível por enquanto apenas em inglês.

Escopo e aplicabilidade

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.

Requisitos técnicos

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.

Métodos de ensaio

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.

Perguntas frequentes

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.

Indicações de aplicabilidade

Tipo: Produto
CCS: B68
ICS: 79.040
Órgão competente: National Forestry and Grassland Administration
Comitê técnico: National Technical Committee on Timber of Standardization Administration of China

Relações

Substitui:GB 4820-1995