埋地钢质管道三层聚乙烯防腐层各国标准对比

Comparison of Standards for 3-Layer PE Anticorrosive Coatings for Buried Steel Pipeline

为了满足涉外工程的需要,对国内外关于三层聚乙烯(3LPE)防腐层的6个标准进行了对比,包括GB/T 23257—2009、ISO 21809-1∶2011、DIN 30670∶2012-04、NF A 49-710∶1988、ΓOCT P51164-98及CSA Z245.21-06;分析了标准规定的范围、防腐层的工作温度、防腐层等级划分、防腐层厚度以及各层的性能指标等,简述了各国标准的特点。分析认为,GB/T 23257—2009对防腐层各方面的性能要求较其他标准更加详细、严格,有利于涂层的质量控制。对于涉外项目,要求执行国外标准时,应特别注意国外标准与GB/T 23257—2009的差异性。

In order to meet the needs of foreign projects, this article compares the 6 do- mestic and/or foreign standards for 3LPE coatings, including GB/T 23257--2009, ISO 21809 -1：2011, DIN 30670：2012-04, NF A 49-710：1988, FOCT P 51164-98 and CSA Z245.21 -06. the scope of the standard, the working temperature, classification, coating thickness and the performance index of anticorrosive coating are analyzed in detail. The characteristics of these standards are described. In general, the GB/T 23257--2009 describes the more stringent and detailed demands on comprehensive performance of anticorrosive coatings, con- ducive for quality control of coatings. As for foreign projects, the differences between foreign standards and GB/T 23257--2009 should be underlined in particular if the implementation of foreign standards is required.