Why independent conduit testing is needed
Performance requirements for coated conduit are crucial.
For years, all available brands of polyvinyl chloride (PVC)-coated galvanized conduit met the same UL 6 standards and carried an identical UL label relating to safety conformance. Yet, it was apparent in the marketplace that not all brands performed the same. With products like coated conduit, adhesion of the coating is crucial. If the coating bond is broken, a void is created and moisture penetrates to the metal substrate and corrosion is actually accelerated.
The lack of performance requirements for coated conduit has been recognized by many companies and is gaining recognition by users. This fact is confirmed by recent discussions with consulting, specifying, and maintenance engineers at paper plants, wastewater treatment facilities, and other locations.
To confirm the performance of the PVC coating, Intertek evaluated PVC-coated galvanized conduit brands solely for product performance and longevity as tested under conditions consistent with highly corrosive environments. Heat and humidity are recognized corrosion accelerators in corrosion engineering textbooks and technical documents from organizations such as the National Association of Corrosion Engineers (NACE).
The test results provided a quantitative method to compare the relative performance of coated conduit systems in conditions typical of the corrosive application environments. The results of both tests confirm significant differentiation in adhesion performance of the PVC coated conduit available in the market and why only certain brands carry Intertek’s ETL label.
Stephanie Ellis is director of Corrosion College. She holds a basic certification from the National Association of Corrosion Engineers and is a member of the International Association of Electrical Inspectors. Corrosion College is a hands-on course that explains the process of corrosion through intensive instruction by professionals in the field of corrosion protection.
Case Study Database
Get more exposure for your case study by uploading it to the Plant Engineering case study database, where end-users can identify relevant solutions and explore what the experts are doing to effectively implement a variety of technology and productivity related projects.
These case studies provide examples of how knowledgeable solution providers have used technology, processes and people to create effective and successful implementations in real-world situations. Case studies can be completed by filling out a simple online form where you can outline the project title, abstract, and full story in 1500 words or less; upload photos, videos and a logo.
Click here to visit the Case Study Database and upload your case study.
Annual Salary Survey
In a year when manufacturing continued to lead the economic rebound, it makes sense that plant manager bonuses rebounded. Plant Engineering’s annual Salary Survey shows both wages and bonuses rose in 2012 after a retreat the year before.
Average salary across all job titles for plant floor management rose 3.5% to $95,446, and bonus compensation jumped to $15,162, a 4.2% increase from the 2010 level and double the 2011 total, which showed a sharp drop in bonus.