UNLIMITED FREE ACCESS TO THE WORLD'S BEST IDEAS

close

This is embarrasing..

An error occurred while processing the form. Please try again in a few minutes.

Customize Your Engineering360 Experience

close
Privacy Policy

This is embarrasing..

An error occurred while processing the form. Please try again in a few minutes.

DNVGL-RP-F103

Cathodic protection of submarine pipelines

active, Most Current
Buy Now
Organization: DNVGL
Publication Date: 1 September 2019
Status: active
Page Count: 70
scope:

Scope of this document

The CP calculation procedures in this RP generally comply with the requirements and recommendations in the applicable sections of ISO 15589-2, although the approach to the importance of pipeline coating systems' design and the quality control of their application, especially for FJC, differs from that of the ISO standard. The same applies to the relative importance of seawater ambient temperature and internal fluid temperature on design current densities.

DNVGL-RP-F103 is applicable to submarine pipeline systems as defined in DNVGL-ST-F101, except riser sections above mean water level for which cathodic protection is not practical. For any landfall sections to be protected by impressed current CP, reference is made to the latest revisions of ISO 15589-1 and EN 12954.

The present document covers the detailed design of CP for submarine pipeline systems using galvanic anodes, either Al or Zn based, and the manufacture and installation of such anodes. For CP of subsea manifold templates, riser bases and other subsea structures where components of a pipeline system are electrically connected to major surfaces of structural C-steel, use of DNVGL-RP-B401 is recommended for CP design. For conceptual CP design, Sec.6 is applicable to preliminary calculations of the anode net mass and anode distribution. For requirements to anode steel inserts and the inspection and testing during anode manufacture in Sec.7, reference is made to the applicable sections in ISO 15589-2.

By referring to requirements to the design and quality control of specific coating systems for linepipe, field joints and field repairs in DNVGL-RP-F102 and DNVGL-RP-F106, individual coating breakdown factors for linepipe and field joint coating, respectively are recommended in this RP (App.A). The primary purpose of this approach is to ensure that the CP design is adequate for the actual combination of coating systems to be applied and to enable a CP design without any arbitrary allowance for deficiencies associated with the design and quality control of such coatings. The RP emphasises the importance of documentation of quality control and gives comprehensive advice and guidance related to CP design, anode manufacture and installation. This guidance covers both purchaser's specification and contractor's execution of QA/QC.

Full conceptual design of CP, detailed design of impressed current CP systems, and the operation of pipeline CP systems are not addressed in this document. For these items, reference is made to the general guidelines in DNVGL-ST-F101 and the somewhat more detailed recommendations in ISO 15589-1, ISO 15589-2 and EN 12474. For electrochemical testing of galvanic anode materials for the purpose of either qualification or quality control, reference is also made to DNVGL-RP-B401 App.C and DNVGL-RP-B401 App.B, respectively.

Considerations related to safety and environmental hazards associated with galvanic anode manufacture and installation are beyond the scope of this document.

Document History

DNVGL-RP-F103
September 1, 2019
Cathodic protection of submarine pipelines
Scope of this document The CP calculation procedures in this RP generally comply with the requirements and recommendations in the applicable sections of ISO 15589-2, although the approach to the...
July 1, 2016
CATHODIC PROTECTION OF SUBMARINE PIPELINES BY GALVANIC ANODES
A description is not available for this item.
July 1, 2016
Cathodic protection of submarine pipelines
Scope of this document  The CP calculation procedures in this RP generally comply with the requirements and recommendations in the applicable sections of ISO 15589-2, although the approach to the...
October 1, 2010
CATHODIC PROTECTION OF SUBMARINE PIPELINES BY GALVANIC ANODES
This Recommended Practice (RP) has been prepared to facilitate the execution of detailed CP design and the specification of galvanic anode manufacturing and installation. While the requirements and...
October 1, 2003
CATHODIC PROTECTION OF SUBMARINE PIPELINES BY GALVANIC ANODES
This Recommended Practice (RP) has been prepared to facilitate the execution of detailed CP design and the specification of galvanic anode manufacturing and installation. While the requirements and...
October 1, 2003
CATHODIC PROTECTION OF SUBMARINE PIPELINES BY GALVANIC ANODES
A description is not available for this item.
October 1, 2003
CATHODIC PROTECTION OF SUBMARINE PIPELINES BY GALVANIC ANODES
This Recommended Practice (RP) has been prepared to facilitate the execution of detailed CP design and the specification of galvanic anode manufacturing and installation. While the requirements and...
October 1, 2003
CATHODIC PROTECTION OF SUBMARINE PIPELINES BY GALVANIC ANODES
A description is not available for this item.

References

Advertisement