STN EN ISO 21857
| Name: | STN EN ISO 21857 |
| Validity: | Withdrawn |
| Number of pages: | 80 |
| Language: |
EN
|
| Paper: | 28,80€ |
| Electronic version |
a) Only read (without ability to print and copy)
25,92€ b) Without ability to print, with ability to copy (printscreen) 28,80€ c) With ability to print and copy (printscreen) 37,44€ |
| Slovak title | Ropný, petrochemický a plynárenský priemysel. Ochranné opatrenia proti korózii na potrubných systémoch ovplyvnených bludnými prúdmi (ISO 21857: 2021) |
| English title | Petroleum, petrochemical and natural gas industries - Prevention of corrosion on pipeline systems influenced by stray currents (ISO 21857:2021) |
| Release Date: | 01. 01. 2022 |
| Date of withdrawal: | 01. 11. 2022 |
| ICS: | 75.200 |
| Sorting character/National clasification code | 03 8360 |
| Level of incorporation: | idt ISO 21857:2021, idt EN ISO 21857:2021 |
| Official Journal | 12/21 |
| Amendments | |
| Replaced by: | STN EN ISO 21857:2022-11 (03 8360) |
| Repleces: | |
| Note in Official Journal: | |
| Subject of the standard: | This document establishes the general principles to be adopted to minimize the effects of stray current corrosion caused by direct-current (d.c.) on buried or immersed pipeline systems. A brief description of alternating current (a.c.) effects is provided. The document is intended to offer guidance for: — the design of cathodic protection systems which may produce stray currents; — the design of pipeline systems, or elements of pipeline systems, which are to be buried or immersed and which may be subject to stray current corrosion; — the selection of appropriate protection or mitigation measures. The effects of a.c. induced voltages are not dealt with in detail in this document because they are covered in ISO 18086. General principles and guidelines are, however, provided. Stray current corrosion can also occur internally in systems containing a conducting electrolyte e.g. near insulating joints or high resistance pipe joints in pipelines transporting conductive fluids. |
| Preview: | Náhľad normy (PDF) |