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The storage and transportation of biofuels continue to be of interest. Material compatibility issues arise. For alcohol fuels, stress corrosion cracking of steels, and swelling and leaching of various polymeric materials. This paper will provide an overview of research that has been conducted in alcohol fuels.
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HISTORICAL DOCUMENT. Determining the appropriate assessment method for corrosion threats, as a part of a pipeline integrity process. Specifically intended for buried onshore pipelines constructed from ferrous materials.
This standard practice is intended to provide guidance to those designing, fabricating, and/or maintaining refinery equipment and piping that are exposed to caustic environments.
Caustic is used in many petroleum refinery applications in a wide range of concentrations and temperatures. Caustic stress corrosion cracking (SCC) of carbon steel (CS) equipment has been reported in industry since the 1930s, e.g., in riveted steam boilers. NACE has published guidance for handling sodium hydroxide (NaOH) in the form of a “Caustic Service Chart” since at least the mid-1960s.
New axially loaded full ring test method which was developed and demonstrated to combine the benefits of retaining a full as-welded pipe pup-piece, permitting single-sided exposure, with the advantage of tensile loading of the complete tubular specimen.
Pipeline Coatings provides the reader with a history of generic pipeline coating types, technical information about testing, application, and use. There is very practical information about selection and evaluation methods for each type of coating system to help those who design pipeline systems. There is also discussion of how coatings work with cathodic protection (CP), CP shielding by coatings, and other related issues with the various coating systems related to CP.
This is a print-on-demand (POD) book that will be produced just for you in 2-5 days after your order. It should arrive at your door in about one to two weeks. However, due to supply chain and logistic challenges currently affecting the industry, it may take longer. Allow three weeks for international orders.
2017 NACE, 7" x 9", soft cover, 264 pages
A database of SCC growth rates in commercial austenitic stainless steels exposed to pressurized water reactor (PWR) primary water environments was developed and analyzed from international data in high temperature water, with an emphasis on deaerated or hydrogenated water while also including water containing oxygen. Crack growth rate (CGR) disposition equations were derived to reflect the effects of stress intensity factor (K), temperature, Vickers hardness (HV, to represent retained deformation), with enhancement factors for oxygen-containing, high corrosion potential conditions. The tolerance to chloride and sulfate impurities in PWR primary water was also evaluated.
This paper presents an unusual case example of recovery boiler waterside tube deterioration by a combination of SAC and phosphate hideout corrosion mechanisms. The case shows boiler tubes that exhibited through-wall corrosion and cracking.
The use of Duplex Stainless Steels (DSS) in refinery sour environments is governed by ANSI/NACE MR0103/ISO 17945NACE “Metallic materials resistant to sulfide stress cracking in corrosive petroleum refining environments” which limits DSS base materials to be used in Hydrogen Sulfide (H2S) services to a maximum hardness of 28 HRC for materials with a PREN ≤ 40 and to a maximum hardness of 32 HRC for those materials with PREN > 40.1 These hardness values are in line with the hardness requirements of solution annealed as produced straight tubes, but when the heat exchanger design requires the use of integral finning or u-bend tubes, these are subject to significant work hardening that results in as bent and as finned heat exchanger tubes with hardness measurement as high as 418 HV0.5 or 35.6 HRC which clearly exceeds the allowable limits stated above.
Stress corrosion cracking (SCC) initiation and growth rate testing was performed using Alloy A-286, a high-strength iron-base alloy, to evaluate for possible differences in response in boric acid solutions containing KOH vs. LiOH. PWRs are considering a switch from LiOH to KOH because of the uncertain future availability and high cost of Li. To achieve the same pH at temperature (pHT) in typical PWR primary water, the same molar concentration of Li and K is needed. The atomic weight of K is 39.1, which is 5.63 higher than the atomic weight of Li at 6.94, so 1 ppm Li yields the same pHT as 5.63 ppm K. The conductivity differs somewhat because of difference in the mobility of Li+ and K+.