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The focus herein is on comparing integrity probabilistic analysis approaches with a brief discussion on the existing deterministic approaches. The comparison study utilizes real life application of In-Line-Inspection (ILI) and field measurements of corroded onshore pipelines.
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This AMPP technical report is intended for use by North America-based rail car manufacturers, owners, operators, and repairers who are seeking guidance concerning DFT measurement of coatings applied to rail cars.
The tensile pull-off test, as in ASTM 4541, in which a round metal ‘dolly’ is glued to a coating then pulled off is a very common method for measuring adhesion of a coating to its substrate. This technique is very well known to produce joint failures that are not at the intended coating steel interface but may initiate within the coating, within the glue or at the glue-coating interface.
Recently new instruments have been introduced into the market for measuring the profile/roughness of blasted surfaces. One of the major developments is the ability to use scanning technology to rapidly assess a surface and provide profile measurement. This paper looks at the new instruments and the potential impact they can have on the measurement of profile and the benefits to the inspector in terms of the improved efficiency available in completing an inspection.
Real energy savings data for residential buildings is scarce and difficult to find. To address this concern, two identical houses were built in the outskirts of Monterrey, Mexico, where summer temperatures are usually very high (˜113°F). Energy consumptions using different waterproof coatings with different values of solar reflectance were evaluated.
Many coating product data sheets call for surface profiles of 3-4 mils. Others call for 1.5-2 miles surface profile for a very similar coating type – why should this be? To start to understand this we need to first of all look at why we measure the surface profile on steel surfaces. It pretty much comes down to two main things.
This standard practice provides a standardized method of measuring hull roughness to enable reproducible and comparable readings from similar gauges regardless of geographical location.
One of the factors affecting a ship's performance and fuel consumption is the roughness of its foul-free underwater hull. the Condition and type of paint system used may have a major influence on hull roughness and ship performance. Hull roughness has a major impact on vessel fuel efficiency and exhaust emissions. This standard focuses on the mechanical roughness of the hull.
HISTORICAL DOCUMENT. For corrosion control personnel: Determination of the general condition of a pipeline dielectric coating by measurement of conductance (1/R) on sections of underground pipelines.
This test method provides descriptions of the measurement techniques and cautionary measures most commonly used on underground and submerged piping other than offshore piping to determine whether one or more selected criterion has been met at a representative test site(s) with consideration for special conditions. These methods are also applicable to many other underground or submerged metallic structures.
This workshop will review historical methods of data collection and the latest, ever evolving technology to provide rapid, accurate inspection results.
This paper will evaluate methods used to measure surface profiles created by power tools, namely air needle scalers, bristle cleaners, and roto peen scalers. Particular focus will be placed on the use of replica tape and its ability to characterize profiles of various surfaces using a digital replica tape reader with 3D imaging capability. More specifically, this paper will determine if the measurement methods described in ASTM D44171are appropriate for the measurement of profiles produced by power tools.
Steel surfaces are frequently cleaned by abrasive impact prior to the application of protective coatings. The resultant surface profile must be accurately assessed to ensure compliance with job or contract specifications. But is profile height alone (the most commonly measured parameter) a good indicator of long-term coating performance?