Volume-II of IV - GAIL

MECON LIMITED
Delhi
PROCESS & PIPING
DESIGN SECTION
TECHNICAL SPECIFICATION FOR
TEMPORARY CATHODIC
PROTECTION SYSTEM
TECHNICAL SPECIFICATION NO. : MEC/TS/05/62/016A REV-1 Page 1 of 19
1.0 SCOPE
1.1 This specification defines the requirements of design, engineering supply of materials,
installation, testing and commissioning of temporary cathodic protection system of
external surface of cross country underground pipeline/structure including
supplementing of corrosion survey, investigation for interference/ interaction problems
and mitigation of the same. Unless otherwise specified monitoring of the temporary
cathodic protection system till the commissioning of permanent C.P. System shall be
carried out by temporary C.P. contractor.
This specification defines the basic guidelines to develop a suitable temporary cathodic
protection system for the structure required to be protected. All data required in this
regard shall be taken into consideration to develop an acceptable design and for
proper engineering of the system.
1.2 Compliance with these specifications and/ or approval of any of the contractor's
documents shall in no case relieve the contractual obligations.
1.3 In case where temporary and permanent cathodic protection works are being
executed by the same agency, activities of permanent CP system which are common
to temporary CP system shall be completed as part of temporary CP system. In cases
where temporary and permanent cathodic protection works are being executed by
different agencies, the contractual scope of work shall be referred for further details.
1.4 All work to be performed and supplies to be effected as a part of contract shall require
specific approval of owner or his authorised representative. Major activities requiring
approval shall include but not be limited to the following :-
• Corrosion survey data interpretation report and design basis for CP system.
• CP system design package
• Purchase requisitions for major equipment and vendor approval
• Detailed engineering package
• Field testing and commissioning procedure
• Procedures for interference testing and mitigation
• CPL survey and system monitoring procedures
2.0 CODES AND STANDARDS
The system design, performance and materials to be supplied shall unless otherwise
specified, conform to the requirements of latest relevant applicable standards of :-
BIS specifications
BS specifications and codes of practice
ANSI specifications
NFPA publications
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