NACE SP0200-2008
标准操作钢壳管道操作部件号21091已作废

Standard Practice Steel-Cased Pipeline Practices Item No. 21091

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标准号

NACE SP0200-2008

发布日期

2008年01月01日

实施日期

废止日期

无

发布单位

美国防腐工程师协会

适用范围

1.1 Steel casings are used to install and maintain pipeline crossings such as those at road and railroad rights of way. This standard details acceptable practices for the design, fabrication, installation, and maintenance of steel-cased pipelines. 1.2 Use of cased crossings should be avoided unless required by load considerations, unstable soil conditions, or when their use is dictated by sound engineering practices. 1.3 This standard does not imply that utilization of casings is mandatory or necessary. 1.4 This standard does not imply that cased crossings, whether electrically isolated or electrically shorted, contribute to corrosion of a carrier pipe within a cased crossing. However, cased crossings may adversely affect the integrity of the carrier pipe by shielding cathodic protection (CP) current to the pipe or reducing the CP effectiveness on the pipe in the vicinity of the casing. 1.5 The practices contained in this standard may or may not be applicable to casings installed prior to its issuance. It is presumed that all practices described in this standard are performed in a safe manner.

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