GB2702-1990

Safety boxes for explosives

爆炸品保险箱

GB 2702-1990 é uma norma nacional chinesa obrigatória vigente: Safety boxes for explosives. Setor: Máquinas. Foco: Segurança de produtos. Entrada em vigor: 1 de out. de 1991.

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 specifies the technical conditions, testing items, and inspection rules for safety boxes for explosives. It applies to the design and validation of these boxes, which are permitted for railway freight transport as less-than-carload shipments. Manufacturers producing explosive transport containers for the Chinese railway network must adhere to these guidelines. It covers specific size categories (Type A and Type B) used for securing explosive materials during transit.

Requisitos técnicos

The standard outlines stringent physical and structural requirements for the containers. Structurally, the boxes must consist of three layers: an outer steel layer, a middle layer made of aluminum silicate refractory fiber felt, and an inner wooden layer. The boxes must demonstrate high resistance to fire, pressure, and impact to protect internal contents. Regarding performance, the standard defines critical thresholds for fire resistance and thermal insulation. The container must prevent the internal temperature from exceeding specified limits when exposed to a fire environment over a 20-minute duration. Additionally, it sets requirements for structural load-bearing capacity and drop resistance to ensure the box does not deform, crack, or separate during transport accidents. The standard also mandates specific marking and color requirements. Containers must be painted in a designated color and feature hazard labels referencing GB 190 and GB 191, including markings for "explosives," "fragile," "upward," and "keep dry." Proper labeling and structural integrity are mandatory for transport approval.

Métodos de ensaio

GB 2702-90 specifies three primary validation tests: the Thermal Insulation and Fire Resistance Test, which evaluates the box's ability to protect contents from high temperatures; the Free Drop Test, assessing structural and seal strength via a 1.5m drop onto a rigid surface; and the Compression Test, verifying load-bearing capacity for stacking during transit. These tests reference methods outlined in GB 4857.3, GB 4857.5, GB 4857.16, and GB 7633.

Perguntas frequentes

What products are regulated under GB 2702-90?

It applies to safety boxes designed for the transport of explosives, specifically those approved for railway freight transport as less-than-carload lot shipments.

What are the specific structural requirements for the safety boxes under GB 2702-90?

It mandates a three-layer structure: an outer steel layer, a middle layer of aluminum silicate refractory fiber felt, and an inner wooden layer, ensuring both fire resistance and structural integrity.

How does GB 2702-90 differ from general packaging standards?

The standard references several GB 4857 series standards for transport packaging tests, such as GB 4857.3 and GB 4857.5, and GB 7633 for fire resistance test methods, ensuring alignment with domestic transport packaging protocols.

The summary above provides a high-level overview of GB 2702-90. 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 2702-90 today to access all detailed parameters, tables, and testing procedures.

Indicações de aplicabilidade

Tipo: Produto
CCS: A82
Órgão competente: National Railway Administration
Comitê técnico: National Railway Administration

Relações

Substitui:GB 2702-1981