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Within the Wastewater Treatment process the growth of soft fouling materials (algae) create problems such as Total Suspended Solids issues, false BOD readings, clogged pumps, and reduced flow rates through the weirs of clarifiers. Furthermore, dead or dying algae can cause additional odor concerns. This phenomenon has cost municipalities and taxpayer’s untold amounts of money due to the required maintenance dollars spent to correct this problem.
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This guide discusses the rationale and method for improving the statistical quality of coating dry film thickness (DFT) data on ferrous and non-ferrous metal substrates by collecting a larger, more representative data set on various geometries of coated metal surfaces. The data points are collected using traditional Type 2 (electronic) coating thickness gages programmed with continuous read/scanning capability and specialty probes or probe covers, if required by the instrument manufacturer. The guide provides supplementary information to the procedure for obtaining measurements contained in Appendix 10 of the 2022 revision of SSPC-PA 2, “Procedure for Determining Conformance to Dry Coating Thickness Requirements.”
This AMPP standard provides a series of effective and economical test methods to evaluate the performance of candidate offshore platform new construction and maintenance coatings. The testing protocol is established to simulate the offshore environment and based on the major failure modes observed on offshore platforms. The test results will rank the candidate coating systems for end-users to select and coating manufacturers to develop reliable coating systems.
This AMPP standard is specifically targeted for use by tank car owners, operators, and repairers who are seeking guidanceincomplyingwithfederalregulationsregardinginteriorcoating/liningconditiondatacollectionandanalysis.It should be noted that issues similar to those discussed here may arise with other bulk liquid transportation containers, and this document may find applicability in those areas as well.
This NACE International standard practice provides current technology and industry practices for the use of field-applied heat-shrinkable-sleeve coating systems. The standard is intended for use by corrosion control personnel, design engineers, project managers, purchasers, and construction engineers and managers. It is applicable to underground steel pipelines in the oil and gas gathering, distribution, and transmission industries.
The standard practice presents guidelines for establishing minimum requirements to ensure proper application and performance of field-applied, heat-shrinkable sleeves to the external surfaces of coated pipe. Included are methods for (1) qualifying and controlling the quality of a heat-shrinkable sleeve, (2) guidelines for proper application, and (3) inspection and repair techniques to ensure its long-term performance. The standard is applicable to coating systems used to prevent corrosion in conjunction with cathodic protection, and heat-shrinkable wraparound- or tubular-type sleeve coating systems on underground steel pipelines.
Time is money and the ability to speed up the process of taking and analyzing coating thickness readings will always pay dividends in reducing inspection costs. Scanning an area of painted steel will always be quicker than taking individual readings but there was always the danger of wearing the probe and reducing its life.
Aerospace Coatings is rapidly becoming more complex as a technical discipline. Professional certification of Aerospace Coatings Technicians, to an industry standard, is now possible and going forward, should not be regarded as optional for Aerospace Coatings operations.
This updated NACE International standard test method specifies test methods to evaluate the performance of liquid coating systems for seawater immersion services. This test method is intended for use by facility owners and coating manufacturers.The test method covers liquid exterior protective coating systems for offshore platform steel structures, piers, docks, pilings, subsea valves, and wellheads at normal seawater temperature.
Included are four test methods—including cathodic disbondment, seawater immersion resistance, aging stability, and edge coverage—used to evaluate coating systems. The test method also includes two tables; Table 1 details fingerprinting of coating materials, and Table 2 details the test panel geometry, size, substrate material, and minimum quantity.