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Description of BS EN ISO 21857:2021 2021This document establishes the general principles for the evaluation and minimization of the effects of stray current corrosion on external surfaces of buried or immersed pipeline systems caused by AC and DC electrical interference. Other stray current effects such as overheating, and interference with welding operations are not covered in this document. A brief description of AC effects, general principles and some guidelines, are provided. NOTE 1 See ISOÂ 18086 for the effects of alternating current on buried or immersed pipelines. Systems that can also be affected by stray currents include buried or immersed metal structures such as the following:
This document gives guidelines for
Internal corrosion risks from stray currents are not dealt with in detail in this document but principles and measures described here can be applicable for minimizing the interference effects. NOTE 2 The impact of electromagnetic interference on above-ground appurtenances of pipeline systems is covered in EN 50443 , IEC 61140 , IEC 60364-4-41 , IEC 60479-1 , IEC 60364-5-52 , IEC/TSÂ 61201 and IEC/TRÂ 60479-5 . This document can also be used for pipeline systems outside of the petrochemical and natural gas industries and other buried or immersed structures. NOTE 3 EN 50162 provides guidance for railway related structures.
About BSIBSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses. |
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