... Abstract Due to their low ratio of cost versus performances, quenched and tempered (Q&T) high strength low alloyed steels are widely used as tubular goods. For several decades, steel suppliers and academics are investigating the mechanisms of sour corrosion of these materials. Several...

... which forms due to transformation during the first stress relief cycle is tempered by the second stress relief cycle. Overall, design of PWHT can be challenging to ensure not only meeting maximum hardness requirements but also ensuring meeting minimum design yield strength. This study investigates...

... ABSTRACT Microstructure and strength affect hydrogen embrittlement (HE) susceptibility of martensitic steels. In order to understand their respective roles, two martensitic steels with the same chemical composition, but different strength (and or hardness) levels were selected. Incremental step load (ISL...

... Abstract UNS N08935 is a new versatile austenitic alloy with the composition 35Ni-30Fe-27Cr-6.5Mo-0.28N and a PREN of 52. It has an extreme pitting resistance which makes the grade a good candidate for O&G applications. The alloy is available in several strength levels with good ductility...

... current must be able to protect the entire surface area of the pipe diameter. Any rock shield material must also meet or exceed certain impact and tear strength testing, but also pass adequate cathodic protection currents to protect possible defects in the pipe coating. After struggling with a tedious...

.../ISO15156 condition analyzed. For an oilfield user perspective (especially for service equipment), AM 718 questionably requires all its properties to match that of API6CRA bar stocks; however, both yield strength and impact toughness values of AM 718 products should closely match the minimum values...

... to hydrogen embrittlement is observed by both test methods in all three heats of different yield strength (120, 140 and 150 ksi). However, the degree of susceptibility between the three heats can only be differentiated in the rising displacement test. Despite the highest actual yield strength (161 ksi...

... stipulate increased FBE thickness (as much as 1 mm). This thickness increase improves both damage resistance as well as high temperature cathodic disbondment. Pipeline Corrosion Midstream Oil & Gas Publication Division materials and corrosion strength FBE coating specimen flowline corrosion...

... ABSTRACT Precipitation hardenable nickel alloys are commonly used in oil and gas subsea structures where require outstanding mechanical strength and corrosion resistance. In seawater, galvanic coupling to steel or cathodic protection promotes the formation of atomic hydrogen on the surface...

... standards. pipe specimen specimen Houston defect offshore pipeline testing program permission repair system Midstream Oil & Gas Publication Division composite repair system manuscript load transfer material strength texas 77084 coupon-level testing full-scale testing architecture...

... has been lack of mechanical strength and copper-nickel-chromium (CuNi30Cr2) is a unique alloy developed to overcome this. It does not rely on a precipitation hardening mechanism for increasing the mechanical properties but “spinodal” decomposition which is a chemical strengthening mechanism...

... ABSTRACT The high strength and corrosion resistance of nickel-chromium-iron alloys, such as UNS N07718 (Alloy 718), UNS N09945 (Alloy 945) and UNS N09946 (Alloy 945X) make them particularly good candidates for use in demanding environments in the upstream oil and gas industry. These materials...

... ABSTRACT Hydrogen embrittlement occurs when a material’s mechanical strength is weakened by the penetration of atomic hydrogen inside the material, the hydrogen sources are diverse and they all intervene in this phenomenon. Plating processes and cathodic protection induce the production...

... repair. Three composite repair systems were designed to address the primary causes for composite failure: damage resistance, adhesion strength, resistance to cathodic disbondment, and proper installation. The three composite repair systems successfully completed a 14-month field trial in a coastal...

... and gouging resistance are the preferable characteristics to possess in a suitable coating. Pipeline Corrosion Production Chemistry well integrity Corrosion Inhibition rail transportation Subsurface Corrosion flowline corrosion oilfield chemistry riser corrosion H2S management strength texas...

... Corrosion riser corrosion flowline corrosion Production Chemistry materials and corrosion Upstream Oil & Gas Corrosion Management coating material assessment coating system FBE coating coating Corrosion Inhibition oilfield chemistry H2S management strength texas 77084 test result...

... steel permission manuscript boron borocarbide strength transition temperature texas 77084 requirement impact toughness impact property Factors Affecting Impact Toughness in Carbon Steels Sangeetha Cathapuram, Vishal Lagad Lloyd's Register Energy Americas, Inc. 1330 Enclave Parkway, Suite...

... of the mechanism, indicating that the conditions for susceptibility are very specific to the combination of variables stated above. Pipeline Corrosion riser corrosion liquified natural gas Subsurface Corrosion weld strength metals & mining LNG gas monetization Publication Division lme...

... and the performance of the coating was evaluated using pull-off adhesion strength, cathodic disbondment and Atlas cell wet thermal gradient tests. The strength of correlations among the roughness parameters and the FBE coating performance results were compared. Tortuosity, measured with a stylus profilometer...

... 121,000mg/l maximum (simulating formation water fluid); pH=6.0; pH 2 S=5kPa Corrosion Inhibition Upstream Oil & Gas strength steel Production Chemistry specification Publication Division laboratory Sulfide stress metals & mining H2S management SMSS texas 77084 specimen...