{"id":385143,"date":"2024-10-20T03:29:18","date_gmt":"2024-10-20T03:29:18","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iso-218572021\/"},"modified":"2024-10-26T06:19:22","modified_gmt":"2024-10-26T06:19:22","slug":"bs-en-iso-218572021","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iso-218572021\/","title":{"rendered":"BS EN ISO 21857:2021"},"content":{"rendered":"

This 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.<\/p>\n

Other stray current effects such as overheating, and interference with welding operations are not covered in this document.<\/p>\n

A brief description of AC effects, general principles and some guidelines, are provided.<\/p>\n

\n
\n NOTE 1\n <\/div>\n

See ISO 18086<\/span><\/span> for the effects of alternating current on buried or immersed pipelines.<\/p>\n<\/div>\n

Systems that can also be affected by stray currents include buried or immersed metal structures such as the following:<\/p>\n

    \n
  1. \n

    pipeline systems;<\/p>\n<\/li>\n

  2. \n

    metal sheathed cables;<\/p>\n<\/li>\n

  3. \n

    tanks and vessels;<\/p>\n<\/li>\n

  4. \n

    earthing systems;<\/p>\n<\/li>\n

  5. \n

    steel reinforcement in concrete;<\/p>\n<\/li>\n

  6. \n

    sheet steel piling.<\/p>\n<\/li>\n<\/ol>\n

    This document gives guidelines for<\/p>\n

      \n
    • \n

      the design of cathodic protection systems that might produce stray currents,<\/p>\n<\/li>\n

    • \n

      the design of pipeline systems, or elements of pipeline systems, which are buried or immersed, and which can be subject to stray current corrosion, and<\/p>\n<\/li>\n

    • \n

      the selection of appropriate protection or mitigation measures.<\/p>\n<\/li>\n<\/ul>\n

      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.<\/p>\n

      \n
      \n NOTE 2\n <\/div>\n

      The impact of electromagnetic interference on above-ground appurtenances of pipeline systems is covered in EN 50443<\/span><\/span> , IEC 61140<\/span><\/span> , IEC 60364-4-41<\/span><\/span> , IEC 60479-1<\/span><\/span> , IEC 60364-5-52<\/span><\/span> , IEC\/TS 61201<\/span><\/span> and IEC\/TR 60479-5<\/span><\/span> .<\/p>\n<\/div>\n

      This document can also be used for pipeline systems outside of the petrochemical and natural gas industries and other buried or immersed structures.<\/p>\n

      \n
      \n NOTE 3\n <\/div>\n

      EN 50162<\/span><\/span> provides guidance for railway related structures.<\/p>\n<\/div>\n

      PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
      PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
      2<\/td>\nundefined <\/td>\n<\/tr>\n
      3<\/td>\n64_e_stf.pdf <\/td>\n<\/tr>\n
      5<\/td>\nEuropean foreword
      Endorsement notice <\/td>\n<\/tr>\n
      8<\/td>\nForeword <\/td>\n<\/tr>\n
      9<\/td>\nIntroduction <\/td>\n<\/tr>\n
      10<\/td>\n1 Scope
      2 Normative references <\/td>\n<\/tr>\n
      11<\/td>\n3 Terms and definitions <\/td>\n<\/tr>\n
      12<\/td>\n4 Abbreviations and symbols
      4.1 Abbreviations <\/td>\n<\/tr>\n
      13<\/td>\n4.2 Symbols <\/td>\n<\/tr>\n
      14<\/td>\n5 Information exchange and co-operation <\/td>\n<\/tr>\n
      15<\/td>\n6 Common sources of interference that can affect corrosion
      6.1 General <\/td>\n<\/tr>\n
      16<\/td>\n6.2 Direct current
      6.2.1 General
      6.2.2 Traction systems
      6.2.3 Industrial systems
      6.3 Alternating current
      6.3.1 General <\/td>\n<\/tr>\n
      17<\/td>\n6.3.2 Overhead and buried power lines
      6.4 High-voltage direct current transmission systems
      6.5 Natural interference
      6.5.1 General
      6.5.2 Geomagnetic (telluric) interference <\/td>\n<\/tr>\n
      18<\/td>\n6.5.3 Tidal interference effects
      7 Identification and measurement of stray current interference
      7.1 Principle <\/td>\n<\/tr>\n
      19<\/td>\n7.2 Stray Current interference
      7.2.1 Inductive and conductive coupling from remote sources
      7.2.2 Conductive coupling from nearby sources
      7.3 Measurement of electrical parameters
      7.3.1 Data acquisition systems <\/td>\n<\/tr>\n
      20<\/td>\n7.3.2 Possible errors in AC measurements
      7.3.3 Potential measurement
      7.3.4 Current measurement on probes
      7.3.5 IR-free potential measurement on coupons or probes
      7.3.6 Duration of the measurement <\/td>\n<\/tr>\n
      21<\/td>\n7.3.7 Specific requirements for coupons or probes
      7.4 Corrosion rate measurement
      8 Acceptance criteria for DC interference
      8.1 Overview of criteria <\/td>\n<\/tr>\n
      22<\/td>\n8.2 Corrosion rate <\/td>\n<\/tr>\n
      23<\/td>\n8.3 Criteria for steel and cast iron
      8.3.1 Time constant interference <\/td>\n<\/tr>\n
      24<\/td>\n8.3.2 Time variant interference <\/td>\n<\/tr>\n
      25<\/td>\n8.4 Criteria for steel pipes in concrete based on potential measurements without cathodic protection
      8.4.1 Time constant anodic interference
      8.4.2 Time variant interference
      9 Reduction of DC stray current interference
      9.1 General <\/td>\n<\/tr>\n
      26<\/td>\n9.2 Modifications to the source of interference
      9.2.1 Principles
      9.2.2 Direct current systems at industrial sites
      9.2.3 Direct current systems at ports
      9.2.4 Direct current traction systems <\/td>\n<\/tr>\n
      27<\/td>\n9.2.5 Cathodic protection systems <\/td>\n<\/tr>\n
      28<\/td>\n9.2.6 Telluric interference
      9.2.7 Direct current communication systems
      10 Modifications to the interfered structure
      10.1 General <\/td>\n<\/tr>\n
      29<\/td>\n10.2 Design prerequisites
      10.2.1 Coatings
      10.2.2 Isolation from other structures
      10.2.3 Distance to be maximized
      10.2.4 Installation of mitigation devices <\/td>\n<\/tr>\n
      30<\/td>\n10.2.5 Modifying the electrical continuity of the interfered structure <\/td>\n<\/tr>\n
      31<\/td>\n11 Inspection and maintenance <\/td>\n<\/tr>\n
      32<\/td>\nAnnex A (informative) Use of current probes to evaluate fluctuating stray current interference on cathodically protected structures <\/td>\n<\/tr>\n
      35<\/td>\nAnnex B (informative) Determining the relevant position for placing reference electrodes, coupons and probes in case of any conductive coupling caused by stray currents <\/td>\n<\/tr>\n
      42<\/td>\nAnnex C (informative) Operating principles of electrical resistance probes <\/td>\n<\/tr>\n
      43<\/td>\nAnnex D (informative) Geomagnetic interference <\/td>\n<\/tr>\n
      52<\/td>\nAnnex E (informative) High voltage direct current interference <\/td>\n<\/tr>\n
      54<\/td>\nAnnex F (informative) Alternating Current Interference <\/td>\n<\/tr>\n
      59<\/td>\nAnnex G (informative) Tidal Effects <\/td>\n<\/tr>\n
      60<\/td>\nAnnex H (informative) Photovoltaic interference <\/td>\n<\/tr>\n
      63<\/td>\nAnnex I (informative) Modelling the effects of stray current interference on cathodically protected pipelines <\/td>\n<\/tr>\n
      67<\/td>\nAnnex J (informative) Assessment of the corrosion risk for steel in concrete or for cathodically protected structures under time variant interference conditions <\/td>\n<\/tr>\n
      72<\/td>\nAnnex K (informative) Principles of anodic and cathodic interference <\/td>\n<\/tr>\n
      75<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

      Petroleum, petrochemical and natural gas industries. Prevention of corrosion on pipeline systems influenced by stray currents<\/b><\/p>\n\n\n\n\n
      Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
      BSI<\/b><\/a><\/td>\n2021<\/td>\n78<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":385152,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-385143","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/385143","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/385152"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=385143"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=385143"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=385143"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}