... Abstract To obtain heat affected zone (HAZ) hardness levels below maximums specified in the current (2015) edition of NACE (1) MR0175/ISO (2) 15156-3 for sour service use, welded super martensitic stainless steels (SMSS) need post weld heat treatment (PWHT). PWHT is mainly done by stress...

... fabricated using a submerged arc (SAW) welding procedure specification (WPS) previously demonstrated to be capable of BS 7608 Class C fatigue performance. Welds were post-weld heat treated (PWHT) at 621 °C (1150 °F) in accordance with the welding procedure to temper the 8630M heat-affected zone (HAZ...

... Corrosion Management amine Production Chemistry Upstream Oil & Gas weld mechanism materials and corrosion riser corrosion H2S management texas 77084 SCC Publication Division stress corrosion requirement hardness Thickness PWHT permission manuscript severity service steel Houston...

... Production Chemistry rd sp PWHT Workplace Hazard Upstream Oil & Gas mpa 2 Publication Division SSC texas 77084 Corrosion Inhibition H2S management oilfield chemistry Corrosion Management chemical composition permission manuscript resistance specimen st sp Houston steel...

...). Moreover, PWHT was required by the standard after retention of nominal wall thickness in order to relieve the residual stresses introduced to the melt after weld build-up in order to avoid any Stress Corrosion Cracking. However, heat treatment of this column was infeasible due to stability analysis results...

... residual stress pipeline corrosion well integrity thickness pwht deaerator eac boiler component Abstract This paper is inspired by a series of failures that occurred in steam drums and deareators in power generation and chemical/petrochemical plants. In each case the failure occurred in non...

... combined with optimized chemical composition and steel fabrication route. Production Chemistry pressure vessel steel Publication Division specimen Upstream Oil & Gas resistance steel permission South Creek Drive manuscript oilfield chemistry Corrosion Management PWHT Ssc Test...

... hardness texas 77084 alloy steel base metal PWHT permission toughness South Creek Drive Publication Division pipe manuscript Microstructure 9% Ni Alloy Steel for H2S Service Annelise Zeemann TECMETAL Estrada dos Bandeirantes 28000 Rio de Janeiro, RJ, CEP 22785-092 Brazil Guilherme Emygdio...

... TEM Investigations into the Effect of a PWHT on IGSCC Susceptibility of Weldable 13Cr Linepipe Marc E. Wilms Shell Global Solutions International. B.V. P.O. Box 38000 1030 BN Amsterdam The Netherlands Sytze Huizinga Shell Global Solutions US Inc. P.O.Box 4327 Houston, TX 77210 USA Jan. G. de Jong...

... INTRODUCTION ABSTRACT: Dissimilar metal welds (DMWs) in high strength steels with Ni-base filler metals are widely used in the oil and petrochemical industries. Welding followed by post weld heat treatment (PWHT) of such welds can result in the formation of extremely hard and brittle...

... the risk of cracking during fabrication. Key words: Alloy 800HT, Alloy 617, reheat cracking, ductility dip, PWHT, heavy-wall INTRODUCTION The capacities of petrochemical plants have increased considerably during the last decade. Large- scale plants often require significantly large, heavy-wall piping...

...2011 Ethanol SCC Research on PWHT Effects and Threshold Stress Determination Anand Venkatesh Brian Chambers Honeywell Corrosion Solutions Honeywell Corrosion Solutions 11201 Greens Crossing Blvd, Suite 700 11201 Greens Crossing Blvd, Suite 700 Houston, TX 77066 Houston, TX 77066 Russell D. Kane Jim...

... ABSTRACT: The effect of post weld heat treatment (PWHT) was studied on a variety of microstructures of the pressure vessel steel (ASTM A516) ranging from the ferrite/pearlite to the tempered bainite obtained by different cooling processes. The hydrogen trapping behavior in sour environment...

... of these steels weld joints in hot acid environments have been published. Electrochemical analysis of weld joints is expected to be effective in understanding the crack mechanism. In this paper, electrochemical behavior of low C - 13%Cr weld joints with and without PWHT was evaluated with the use of a solution...

.... The Crdepletion along grain boundary in the vicinity of the surface oxide layer on HAZ formed by welding was also reported and the initiation mechanism was discussed based on the Cr-depletion of the surface area. The improvement of SCC resistance by Post Weld Heat Treatment (PWHT) has been recognized. PWHT can...

... content and Post Weld Heat Treatment (PWHT) on intergranular SCC in HAZs were studied by means slow strain rate tensile (SSRT) tests. EXPERIMENTAL METHOD This study was conducted on a medium grade SMSS: the X80 12Cr4.5Ni1.5Mo alloy. Three welds were investigated. An internal girth weld made...

... ABSTRACT The effect of alloying elements such as titanium or phosphorus, and the effect of PWHT on SCC susceptibility of super martensitic stainless steel welded joints were examined. On the basis of the sensitization mechanism due to the formation of Cr-carbides, the effect of titanium...

... to determine whether IGSCC could be reliably avoided via control of the welding process or by brief PWHT. Existing data were reviewed and two series of welding trials and corrosion tests were undertaken. The review and first series of tests allowed a hypothesis of the mechanism of sensitisation in SMSS...

... & mining Production Chemistry riser corrosion Corrosion Inhibition materials and corrosion weld Corrosion Management Downstream Oil & Gas PWHT flowline corrosion oilfield chemistry H2S management heat input carbon steel DMW base metal steel dissimilar metal weld filler metal dilution...

.... Implications of chemistry on the postweld heat treatment (PWHT) and weld procedure controls are identified and suggestions made to consider for these HAZ hardness control options. INTRODUCTION Hydrogen Stress Cracking The workhorse plate steel used for petroleum refining and gas processing are P1 Group 1...