... 轧制线位置过低故障钢塑复合管是随着镀锌管的一度被禁止而随之出现的，钢塑复合管顾名思义就是钢管与塑料的结合，同时，钢塑复合管按照成型又可以分为两类：涂塑复合钢管和衬塑复合钢管 。PE防腐一般由层结构组成:一层环氧粉末(FBE>um)二层胶粘剂(AD)~um三层聚乙烯(PE).~.
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单层熔结环氧粉末防腐 FBE
所述聚烯烃基材层涂覆在粉末环氧管道上。
The polyolefin substrate layer is coated on a powder epoxy pipeline.
其表现为：1、熔结环氧粉末（FBE）层偏薄，不能完全覆盖管道金属表面。
The non-conformities are as follows: 1, the thickness of FBElayer is thin, the FBE coating material can not cover the steel surface entirely.
四种防护层噪声电阻大小顺序为三层PE>熔结环氧粉末>煤焦油沥青>沥青玻璃布；
The capacitance of FBE coating is the largest, three layer PE , Coal tar, Oil bitumen were similar, but the capacitance of three layer PE is the smallest both in soil and NaCl solution.
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