... Abstract In 2023 the 4 th Edition of API Recommended Practice 582, “Welding Guidelines for the Chemical, Oil, and Gas Industries” will be issued. The document has undergone a significant revision, including major restructuring, and inclusion of new consensus industry recommendations...

... on similar alloys. Specific challenges for future widespread use of these alloys are defined. age-hardened nickel alloys mechanical properties manufacturing welding strain-age cracking Proceedings of the ASME 2023 Pressure Vessels & Piping Conference PVP2023 July 16-21, 2023, Atlanta, Georgia...

... Abstract Low alloy steels containing chromium and molybdenum (CrMo steels) are widely used in pressure equipment in the petrochemical industry. However, if their manufacturing and production welding are not properly controlled, or if they are operating beyond their design conditions...

..., cracks, bulging and local wall-thinning are frequently occurred at the root of the top-nozzles, shell and along the bead direction of the fillet weld in skirt-to-conical head joints. A typical case is given in this paper on the inspection process of a newly improved coke drum, and 18 longitudinal cracks...

... Abstract In arc welding processes, heat input is a measure of the energy that is supplied to the workpiece to produce the molten weld puddle. Heat input is generally calculated by taking the arc energy (volts × amperage) divided by the electrode linear travel speed. The units are typically (kJ...

... of the welds and to balance toughness, tensile and hardness properties required by the severe service condition. This paper aims at summarizing some technical data on high strength carbon steel SA-537 class 2 and low-alloy steel SA-533 type C class 2. A case study will illustrate the weight savings that can...

... Abstract Artificial Intelligence (AI) has been applied to accelerate the analysis of outputs from the phased-array ultrasonic (PAUT) non-destructive testing (NDT). The aim of this work is the development and analysis of AI tools for the output processing of PAUT applied to welding defects...

...Proceedings of the ASME 2022 Pressure Vessels & Piping Conference PVP2022 July 17-22, 2022, Las Vegas, Nevada, USA PVP2022-84456 DESIGN OF AN INTELLIGENT BUTT-FUSING WELDING MACHINE FOR HDPE PIPES Zhenchao Wang1,2, Lu Xu2, Qijiang You2, Yijuan Peng1, Qiuju Zhang1 1. School of Mechanical Engineering...

... has complex microstructure and requires careful control of welding parameters to assure crack free welds that provide adequate creep ductility and retain creep strength at high temperatures. The current guidelines documented in API 582 and Technical Report 938 provide limited insights on success...

... material. The butt joint had been operating for the same period of 200,000 hours, same temperature of 528°C at almost a half pressure (0.46 Kg/mm 2 vs. 1.06 Kg/mm 2 ). X-ray diffraction (XRD) technique applied close to the weld highlighted anomalously high stress-level on the outer surface for all four...

... input welding operation like submerged arc welding (SAW) is the crucial area for failure during the application of welded structure. Large detrimental changes occur in mechanical behavior and microstructural characteristics of HAZ due to thermal cycles of the welding operation. In this study, CGHAZ...

... Abstract Liquid penetrant testing (PT), magnetic particle testing (MT) and ultrasonic testing (UT) have been used as nondestructive testing methods for the welded tubular joints of reactor cooling systems. The PT and the MT that are applied to the surface test of the specimen have been...

... Abstract Residual stresses resulting from welds are a key consideration in the design and assessment of piping and pressure vessels. As welding is a variable process, the resulting variability in weld residual stress should be accounted for in design and assessment. This paper investigates...

... Abstract Previous study carried out residual stress characterization for the welds of the high-temperature-section (superheater / reheater) lower headers of the bottom-supported heat-recovery steam generator (HRSG). Modeling the gas-tungsten arc, manual welding process considered only weld-lay...

... Finite Element Welding Simulation Welding Nickel based alloy Stress corrosion cracking Residual stresses PWR Simplified method The integrity of structures in nuclear power plants has to be assessed to meet given safety criteria. For a better understanding of the in-service loads...

... Storage tanks, silos and other welded cylindrical shell structures are usually constructed of rolled panels which are joined by patterned circumferential and longitudinal welds. Cold-formed residual stresses are produced during the cold bending process of steel panels, and obvious deformations...

... The implementation of a semi-empirical solid-state phase transformation subroutine in the ABAQUS finite element package is presented to predict the influence of transformation strain on the post-weld residual stress field in ferritic steels. The phase transformation subroutine has been outlined...

... The numerical application of solid-state phase transformation kinetics relating to conventional welding of ferritic steels is presented. The inclusion of such kinetics in weld models is shown to be necessary for capturing the post-weld residual stress field. To this end, a comparison of two...

... indicated that the exposure to H 2 significantly reduces the fracture toughness of 4340 high strength steels by up to 50 percent. Furthermore, SNTT tests conducted in air demonstrated a significant fracture toughness reduction in samples subject to simulated welding heat treatment using a Gleeble machine...

... 14 01 2011 Large welded steel tanks for oil storage (oil tank for short in following text) are usually constructed by welding together several varying thickness cylindrical shells. The generated welding residual stress and deformation may affect the buckling behavior of oil tanks...