Study of wind-toughness of metal arc welding with reference to multi-pass weld metal quality

Suzuki, Reiichi; Sasakura, Shuji; Yokota, Yasuyuki; Sato, Toyoyuki; Shigemori, Yasunobu; Uenaka, Akio; Nishimura, Hitoshi; Kiso, Hiroyuki

doi:10.1080/09507116.2016.1223188

Cited by 4 publications

(3 citation statements)

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“…Another study examined the effects of air flow direction and velocity on steel weld quality, revealing that the best welds were achieved at an air flow velocity of 0.5 m/s [5]. The flow direction effect was not discussed in this paper due to welding room limitation of design.…”

Section: Literature Review and Problem Statementmentioning

confidence: 97%

“…The paper [5,13] have defined the negative effects of air flow velocity on GMAW. However, the welding room requiring an air ventilation system which generate air flow to maintain the good air quality.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

“…Ensuring high-quality weld joints involves meticulous attention to the performance of shielding gases during welding operations, as they play a crucial role in protecting the arc from atmospheric contaminants [1]. Among the various chal-lenges encountered, wind-induced disturbances stand out as a primary factor that can compromise the effectiveness of shielding gas, consequently increasing the risk of welding defects [5]. Porosity represents a significant concern within the realm of aluminum alloy welding, with profound implications for the mechanical integrity of weld joints.…”

Section: Introductionmentioning

confidence: 99%

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Welding room development for simultaneous improvement of welder health and weld quality of gas metals arc welded aluminum AA5083-H112

Triyono,

Harseno,

Muhayat

2024

EEJET

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This study investigated the weld joint mechanical properties and welding fume exposure associated with Gas Metal Arc Welding of aluminum AA5083-H112 in 27 different welding room environment conditions. These conditions consist of variation in temperature, as well as intake and exhaust wind velocities. The temperature varies as 19 °C, 27 °C and 35 °C. Both the intake and exhaust velocity vary as 0 m/s, 3.1 m/s and 5.5 m/s. The experimental findings underscore the pronounced influence of these factors on both weld quality and welder exposure to fumes. Notably, intake wind velocity emerges as the most critical factor, contributing significantly to 47.68 % in weld joint tensile strength. The temperature emerges as the least critical factor with 12.02 % of contribution. However, temperature became the most critical factor on weld joint impact energy with 54.89 % of contribution while exhaust wind velocity became the least with 3.89 %. Air quality monitoring highlights the importance of optimal intake and exhaust fan configuration to effectively reduce fume exposure. All examined welding room environment condition are deemed safe for the welder, as they do not exceed the Treshold Limit Value (TLV), except the condition where the welding room lacks of air circulation in intake and exhaust wind velocity of 0 m/s. The identified optimal welding room condition exerts a temperature of 27 °C, intake and exhaust wind velocity of 0 m/s and 3.1 m/s respectively. This condition not only achieves established weld quality standards but also ensures compliance with fume exposure regulation. This research provides valuable insights for optimizing welding room environment to simultaneously maintain weld quality and safeguard the well-being of welders

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Section: Literature Review and Problem Statementmentioning

confidence: 97%

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Welding room development for simultaneous improvement of welder health and weld quality of gas metals arc welded aluminum AA5083-H112

Triyono,

Harseno,

Muhayat

2024

EEJET

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Influence of Workplace Air Circulation System on Weld Porosity and Fume of Aluminum Welding Process

Harseno,

Muhayat,

Triyono

2024

Lecture Notes in Mechanical Engineering

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Requirements for the information on reference standards submitted in the dossier for biologicals

Volkova,

Fadeikina,

Ustinnikova

et al. 2024

Biological Products. Prevention, Diagnosis, Treatment

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SCIENTIFIC RELEVANCE. The use of appropriately certified reference standards (RSs) is a necessary element of analytical procedure standardisation that ensures comparability of results across different laboratories assessing the quality of medicines, which is important for the quality control of biologicals. Marketing authorisation involves providing information on RSs, but no specific requirements are given for the relevant section of the dossier. Therefore, it is necessary to develop the requirements for the appropriate guidelines.AIM. This study aimed to develop specific requirements for the materials that should be included in the Reference Standards section of the dossier for a biological product.DISCUSSION. The authors analysed national and international regulatory frameworks governing RSs for biologicals, including documents by the World Health Organisation (WHO), the Eurasian Economic Union, the International Organisation for Standardisation (ISO), and the Russian Federal Agency for Technical Regulation and Metrology. Additionally, the authors analysed the experience of RS certification and use at the Scientific Centre for Expert Evaluation of Medicinal Products. This article covers specific aspects of biological RS certification, considering the differences between measurement techniques and analytical procedures. The authors formulated the key requirements for the documents submitted in the dossier section on RSs for biologicals (biological reference materials). The methods (analytical procedures) used for RS certification should be described in accordance with the requirements for standard operating procedures. Adequate validation studies should establish the necessary validation characteristics of these analytical procedures. Additionally, this article presents the requirements developed to certify primary RSs for structure confirmation of proteins in novel biologicals. The values of certified characteristics and critical quality indicators should be established, and the RS production technology should be described and in compliance with WHO recommendations and/or Good Manufacturing Practice (GMP) standards. The basic certification stages are common to all types of RSs. The RS shelf life should be established in real-time stability studies, whereas accelerated stability testing may be useful for studying degradation mechanisms and the effects of short-term deviations from the specified storage conditions. In accordance with WHO recommendations, the Reference Standards section of the registration dossier should specify changes to the RS that require regulatory approval.CONCLUSIONS. The authors believe that the requirements for the materials in the Reference Standards section of the dossier for a biological product, as systematised in this study for inclusion in the relevant guidelines, will provide a unified approach to RS development, certification, and documentation for applicants, developers, and competent authority experts and will streamline RS consideration during marketing authorisation.

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Study of wind-toughness of metal arc welding with reference to multi-pass weld metal quality

Cited by 4 publications

References 1 publication

Welding room development for simultaneous improvement of welder health and weld quality of gas metals arc welded aluminum AA5083-H112

Welding room development for simultaneous improvement of welder health and weld quality of gas metals arc welded aluminum AA5083-H112

Influence of Workplace Air Circulation System on Weld Porosity and Fume of Aluminum Welding Process

Requirements for the information on reference standards submitted in the dossier for biologicals

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