IEEE P2655 DRAFT
Atmospheric Above Grade Inspection and Assessment of Corrosion on Steel Electrical Transmission, Distribution, and Substation Structures
|Publication Date:||1 May 2018|
This standard provides requirements to: (1) help utilities identify structures that may be at a high risk for above-grade corrosion; (2) inspect the selected structures; (3) categorize the condition of structures based on corrosion degradation; (4) prioritize structures requiring additional inspection based on those findings; and (5) help identify next steps as required.
This NACE/IEEE joint standard is limited to the inspection and assessment of steel transmission towers, poles, distribution poles, and substation structures, to include galvanized, and painted mild steel structures, as well as other similar structures. Inspection of below grade and ground-line weathering steel structures will be covered by a standard now in committee at NACE/IEEE.1
This standard does not address the inspection of below grade corrosion of structure components or guy anchors, nor does it provide procedures regarding repair and/or replacement of these structures.
This standard does not provide specific pass/fail criteria. Pass/fail criteria are often determined by structural strength considerations, which are beyond the scope of a corrosion-related standard. Users of this standard are encouraged to develop their own specific set of pass/fail criteria based upon their particular design requirements.
This standard addresses general and localized corrosion.
For the purposes of this standard, the area of inspection is composed of the visible steel portions of the structure.
The definitions of many of the corrosion-related terms used in this standard can be found in NACE/ASTM(1) G193.2
1.1.7 Definitions of key specific terms in this standard are as follows:
(a) Inspection: visual observation of a structure for signs of damage or corrosion
(b) Assessment: the act of judging or deciding the amount, value, quality, or importance of damage and/or corrosion of structures to determine further action such as repair or replacement
(c) Qualified individual: a person who meets legitimate knowledge, skill and/or other requirements through documented or otherwise proven education, knowledge and/or experience.
Purpose-The purpose of this standard is to provide procedures for the use of common inspection practices and technology on structures above grade. The standard includes:
(a) Assessment of historical data to categorize inspection priority;
(b) Above-grade inspection and assessment to categorize structures by level of condition;
(c) Site-specific environmental factors and atmospheric conditions;
(d) Evaluation of existing modifications and repairs.
(1) ASTM International (ASTM), 100 Barr Harbor Dr., West Conshohocken, PA 19428-2959.