Leakage Failure Analysis of Some Gas Transportation Pipeline Girth Weld
Girth weld 0 o''clock (weld) 20 1.7 3.3 16 7 0 0 20 6.7 Girth weld 0 o''clock (HAZ) 45 9 12 22 60 12 15 29 Girth weld 3 o''clock (weld) 11 16 18 15 20 30 26 25.3 Girth weld 3 o''clock (HAZ) 30 9.1 28 22.4 72 13 40 41.7 Fig. 8 Fracture morphology of 2# sample Fig. 9 Morphology of girth weld of 1# sample Fig. 10 Morphology of girth weld of 3
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Journal of Energy Storage
The proposed laser thermography system was designed for noncontact, nondestructive inspection of weld defects in cylindrical lithium-ion battery caps. This system aims to identify internal or
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Repurposing welding waste stubs and wires as substrate in
Welding stubs and wires are machined into small units and assembled together to form the deposition surface. They can be disintegrated easily to release the part, which makes the post-processing trouble-free. with minimal material leakage (390–730 μm depth) in voids and little dilution. proper storage/handling, improved welding
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Hydrogen Pipeline Safety and Challenges
"Expanding Hydrogen Storage to Porous Rock Formations: A Framework for Estimating Feasibility & Operational Considerations" Develop a framework to expand underground hydrogen storage beyond salt caverns to other formation types. Provide a set of operational considerations for selecting suitable porous rock formations.
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Stress Analysis of the Effect of Additional
Weld Conical Surface Length Effects. When analyzing the influence of weld cone length on variable wall thickness butt weld of the suspended pipeline, the operating
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Leakage failure analysis of a 60 m3 LNG storage tank
LNG storage tanks are an integral part of the global natural gas supply chain. Their safety has been a concern among researchers [9].Lee et al. [10] valuated the blast resistance performance of LNG storage tanks by conducting a blast simulation to investigate the safety of larger LNG storage tanks under an extreme loading scenario such as a bomb blast or
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A review of high energy density beam processes for welding
High-energy density beam processes for welding, including laser beam welding and electron beam welding, are essential processes in many industries and provide unique characteristics that are not available with other processes used for welding. More recently, these high-energy density beams have been used to great advantage for additive manufacturing. This review of the
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Influence of weld size on energy input and interfacial strength
This study explored the impact of weld area size on heat input and its subsequent effects on the microstructure, temperature, and strength at the stainless-steel–Ti interface during ultrasonic
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Post Weld Heat Treatment Effect on Welding Residual Stresses
In this report, detailed information on the effects of furnace and local post weld heat treatment on relief of welding residual stresses is provided by reviewing the major pressure vessel design and fabrication codes and defect assessment procedures. Member Report 1071/2016
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Repurposing welding waste stubs and wires as substrate in
This work aims to promote alternate substrate designs in directed energy deposition (DED) processes utilising waste welding stubs and wires obtained from shielded metal arc welding (SMAW) and other arc welding processes. This is required for ease of part removal by overcoming strong fusion between the conventional bulky substrate and deposited part.
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Laser wobble welding of fluid-based cooling channel joining for
Weld strength was optimised using a developed surrogate model and a maximum load of 646.89 N was achieved using 0.2 mm beam offset, 331.82 W laser power and 659.10 mm/min welding speed. Using this optimum combination, a leak-proof cooling channel and module manifold joint were produced for battery thermal management.
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Mechanism of Wellbore Leakage and Sealing Evaluation in Gas Storage
8.1.1 Leakage Accidents and Their Causes in Gas Storage Salt Caverns. Rock salt has good sealing properties, but leakage has occurred in the wellbore or interlayer. Table 8.1 gives the analysis results of salt cavern storage leakage accidents that have occurred domestically and abroad. More than 50% of salt cavern leakage accidents are caused by
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Numerical analysis and experimental research on detection of welding
The welding seam coverage width on both sides of the groove is 1.5 mm, the width of the girth weld is 10.8 mm, and the reinforcement of the girth weld is 1.5 mm. Experimental studies have shown that, the MFL signal at high magnetic field levels is mainly influenced by changes in tube wall geometry, and the effect of weld material on the leakage
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Residual Swin transformer-based weld crack leakage monitoring of
The method based on image coding and residual Swin transformer can effectively identify the abnormal state of the pipeline during operation and distinguish between
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Residual Swin transformer-based weld crack leakage
of sealing at the weld, and eventually leakage [3, 4]. Pressure pipeline leakage will not only cause environmental pollu-tion and energy waste but also may lead to serious safety accidents [5]. Therefore, how to detect the leakage of pres-sure pipeline timely and accurately has become an urgent problem for the industry.
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Effect of high energy density welding processes on inclusion and
arc all weld metal test specimens that had been produced and characterised previously.19 The overall submerged arc weld composition was Fe–0·1C–0·81Si–1·61Mn–0·015Al– 0·018Ti–0·084O (all compositions are in wt-%). This sub-merged arc weld will be referred as SW1A throughout the present paper. A typical inclusion and
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Water leakage due to the welding defect and improvement to
The welding process started at a 3-mm-thickness region with 760 kJ/m of applied energy. This energy increased to 2300 kJ/m when the welding torch arrived at the 8-mm-thickness region.
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Welding process optimization for the inner tank of the electric
During service, leakage often occurs at the welds of the inner tank due to stress concentration. Reducing the welding residual stress and deformation is crucial to improve its
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Cryogenic heat exchangers for process cooling and renewable energy
Cryogenic technologies are commonly used for industrial processes, such as air separation and natural gas liquefaction. Another recently proposed and tested cryogenic application is Liquid Air Energy Storage (LAES). This technology allows for large-scale long-duration storage of renewable energy in the power grid.
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In-depth evaluation of laser welding of thick busbar to 21700 Li
The focus of the present work was to join Ni-plated Al busbars to the 7 of 21700 cylindrical cell can terminals. Fig. 2 a–c shows the laser welding setup with the 21700 cells can and busbar used in this study. Trials were conducted to determine the optimum values of the welding parameters (e.g. laser power, welding speed, wobble amplitude and wobble
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Role of welding residual stress in stainless steel piping with
The predicted leakage rate of piping circumferential through-wall cracks (CTWC) under various loading levels is a critical factor for the application of leak-before-break (LBB) technology. In current engineering approaches, the effect of welding residual stress has not
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Journal of Energy Storage
Journal of Energy Storage. Volume 109, 15 February 2025, 115106. Research papers. Consequently, we minimized the effect of the welding surface pattern and obtained thermal images that reflected only the thermal responses induced by the laser. This result is shown in Fig. 6, where the frames demonstrate the algorithm''s ability to extract
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Full article: Water leakage due to the welding defect and
Furthermore, to clarify the cause of water leakage and improve the design of the target vessel, we must carry out the cause analyses relating to the water leakage that focuses
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Application of laser welding in energy storage battery and PACK
From the manufacture of energy storage battery cells to the assembly of battery packs, welding is a very important manufacturing process. The conductivity, strength, air tightness, metal fatigue
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Laser welding of plastics for energy storage system
National Power''s novel energy storage system required high integrity joints. TWI developed laser welding procedures that were key to the success of the system Subscribe to our newsletter to receive the latest news and events from TWI:
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Development of a flywheel energy storage-based welding system
In modern resistance spot welding applications dynamic current control is essential, but at the same time, the current drawn from the mains should be as low and
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Leakage Failure Analysis of Some Gas Transportation Pipeline
The leak causes of girth weld of a L415M gas pipeline were analyzed by means of macroscopic morphology observation, non-destructive testing, chemical composition
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Metallography of Battery Resistance Spot Welds
to any exterior surface. Pore and voids contained within the weld zone but not open to an exterior surface, and are not determined to have sharp notch like characteristics, shall be acceptable [1]. Depending on requirements, some battery cells are constructed of aluminum canisters while others are constructed of steel.
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