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USDA-certified Biobased, Low VOC and Biodegradable Paint Stripper and Graffiti Remover

Picture for USDA-certified Biobased, Low VOC and Biodegradable Paint Stripper and Graffiti Remover
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For many decades, paint strippers have used hazardous solvents such as methylene chloride and N-Methyl-2-pyrrolidone (NMP) to effectively remove paints and coatings. But safety and environmental concerns have introduced an urgent need for environmentally-friendly alternatives. In March 2019, EPA banned the use methylene chloride in all paint removers for consumer use. However, its replacement, NMP, is now also deemed as a substance of very high concern (SVHC) and in jeopardy of being an option for paint stripping by regulatory forces. 

The newly developed green paint stripper discussed here is free from methylene chloride and NMP. It achieves an environmentally-friendly profile by utilizing agricultural base stocks and recycled industrial solvents. It meets USDA criteria for biobased paint strippers and graffiti removers, and it complies to the VOC requirements of the California Reduced Emission Regulation for Consumer Products. This low odor and biodegradable paint stripper/graffiti remover effectively removes acrylic, alkyd, and urethane-based coatings, as well as marker ink comparably to petrochemical-based and NMP-containing products. In addition, the product contains corrosion inhibitors to prevent discoloration and flash rust on ferrous metals, aluminium, copper, and brass during and after paint removal.  

Product Number: 51320-14503-SG
Author: Ming Shen, Sen Kang, and Casey Heurung
Publication Date: 2020
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$20.00
$20.00
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Picture for Review and Recommendations on PWHT Exemptions for 2014 Edition of ASME B31.3
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Review and Recommendations on PWHT Exemptions for 2014 Edition of ASME B31.3

Product Number: 51320-14543-SG
Author: Deepak Mankar
Publication Date: 2020
$20.00

A major significant change in fabrication/ welding of process piping was brought out by ASME B31.3 2014 addition Table 331.1.3 “Exemptions to Mandatory Postweld Heat Treatment” It now allowed for all carbon steel conforming to P- No1material group for all control Thickness and All weld type with exemption from Postweld heat treatment if a preheat of 95°C (200°F) is applied prior to welding on any nominal material thickness >25mm (1in). Similar exemptions are provided for P-No.3, P-No 4 group 1, and P-No. Group1. These exemptions required a closer scrutiny prior to adaptation. The review is an attempt to make end users aware of its significance.    
Picture for The Effect of Inductive Loading on Rectifier Interruption
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The Effect of Inductive Loading on Rectifier Interruption

Product Number: 51320-14621-SG
Author: Michael M. Dockery, Stephen B. Gibson
Publication Date: 2020
$20.00

Direct current (DC) sources are a critical component of many cathodic protection (CP) systems. In order to assess the performance of these CP systems, momentary interruption of the DC current output is often utilized to help obtain true polarized potentials of protected structures1. This is achieved with a relay that is either integral to the DC current source or installed externally. Traditionally, these relays use a mechanical or mercury contactor, but solid-state relays are becoming more popular for their increased performance and reduced environmental footprint. Recent experience has indicated that interruption of current with an inductive load can damage solid state relays by momentarily exceeding their voltage rating. This has been observed by some CP technicians when they return to site to check on a previously installed interrupter, only to find it overheated and not interrupting. This study will examine the various sources of inductance in impressed current CP systems and discuss methods for mitigating the inductive effects during interruption. To demonstrate the effectiveness of these methods, an electrical circuit was created to mimic a cathodic protection circuit, and the effectiveness during interruption was measured using an oscilloscope.  
Picture for The Sacrificial Anode Cathodic Protection of Prestressed Concrete Pipelines
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The Sacrificial Anode Cathodic Protection of Prestressed Concrete Pipelines

Product Number: 87318
Author: J.T. Gourley, F.E. Moresco
Publication Date: 1987
$20.00

The Use of sacrificial anode cathodic protection has successfully prevented the corrosion of both new and old corroding prestressed non-cylinder concrete pipelines. Field results from 5 new and 3 old lines, which have been cathodically protected for up to 18 years, are reported. In all cases the required potential difference criteria. have been achieved with current densities in the range 0.2 to 1.8 mA per square metre of steel surface area. 
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