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电缆桥架的防火等级及材质

2019-07-23

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 在工程规划文件中一般抽象地将电缆桥架称号为“桥架”,并未指出具体的结构特征,不同类型、不同制作资料的电缆桥架价格皇冠足彩相差较大,且结构类型的混乱会带来工作现场散热、机械防护方面的问题。

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电缆桥架的防火等级及材质

电缆桥架的原料是电缆桥架工程规划常见的另外一个问题。依照资料划分,电缆桥架主要有钢制、玻璃钢和铝合金几种。玻璃钢电缆桥架的特点是质量轻,比重仅为碳钢的1/4;耐水性和耐腐蚀性好,适合化工厂。不易焚烧,难燃型玻璃钢电缆桥架的氧指数≥32。使用寿数长,一般规划寿数为20年,但价格是钢制电缆桥架的3倍。施工的优越性在于切割方便、组装灵敏,装置无需动火,这对于爆破风险环境并且工程工期严重的化工厂工程含义特别严重,由于在爆破风险环境,工程动火装置时化工厂必须停产,经济效益必受影响。铝合金电缆桥架分量也很轻,由于铝、钢比重不同(Al=2.7,Fe=7.86),按分量核算,铝钢之比约为1:3。铝合金电缆桥架外形尺寸、荷载特性均与钢质桥架基本附近。就费用而言,铝合金桥架的造价比镀锌钢制电缆桥架要高20%,使用寿数是钢制电缆桥架的5倍以上。

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