Explosion proof performance: This product is intrinsically safe explosion-proof highest level (IA), available in various inflammable and explosive places (including 0 districts) work completely.

防爆性能：本产品具有本安型最高防爆等级(ia)，可在各种易燃易爆场所(含0区)内完全工作。

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Heating cable cross: must be used in explosive situations linear supporting proof junction box, the general situation can also be used splice or welding.

伴热电缆的交叉：在易燃易爆场合必须采用配套的防爆直线型接线盒，一般场合也可以采用绞接或焊接。

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Detail description about the design and the products'choice of the explosure-proof fire alarm system in combustible and explosive area in petrochemical plant are presented.

对石化行业易燃易爆场所的火灾自动报警防爆型系统的设计及选型做了较详细的描述。

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