The influence of working fluid physical properties on weld qualification for in-service pipelines

被引:1
|
作者
Belanger, RJ [1 ]
Patchett, BM
机构
[1] Ludwig & Associates, Edmonton, AB, Canada
[2] Univ Alberta, Edmonton, AB, Canada
关键词
pipe welding; in-service welding; hot tap; sour service; low-hydrogen SMAW; autogenous GTAW; hydrogen cracking; HAZ; cooling rates;
D O I
暂无
中图分类号
TF [冶金工业];
学科分类号
0806 ;
摘要
Welding on in-service pipelines (hot tapping) has been practiced for many years on pipes containing both liquids and gases. The increasing frequency of sour conditions within gas and oil pipelines increases the risks involved in welding on pressure-containing lines and imposes additional restraints in the form of maximum tolerable hardness, especially in the heat-affected zone (HAZ). While there are existing procedures to deal with the cooling rate effects of the liquid or gas contained within a pipeline, little is known of the effects of the physical properties of the liquid or gas on the cooling rates to be expected. Most experimental work on procedure verification has been done on still or circulating water as the working fluid. In this study, a pressurized test coupon of X-52-type pipe was filled with liquids of differing physical properties - water, ethylene glycol, methanol, water-glycol mixtures and water-methanol mixtures. Thermocouples monitored inside wall-temperature changes caused by mechanized GTAW autogenous fusion runs on the pipe surface, and optical pyrometer measurements were used to assess outside wall temperature cycles. The results show both the working fluid physical properties and the pipe pressure conditions affect the weld zone cooling rate to a significant degree. it is possible to control cooling rates on the inside and outside walls of the pipe by adjusting working fluid properties and internal pressure conditions. Low-hydrogen SMAW deposits were compared to the autogenous GTAW runs for limited but practical repair procedural conditions. This showed the expected heat input increase due to more efficient SMAW are conditions is about 25%,This difference is somewhat lower than the usual GTAW/SMAW are efficiency comparisons in the literature. It indicates the necessity for more trials incorporating the range of welding process parameters to be considered in evaluating the working fluid cooling characteristics. Once the heat input relationships for various processes are established, the cooling rate control possible with various working fluid compositions can be utilized to assess procedure qualification in a controlled engineering environment. A procedure qualification involving the modified water-ethylene glycol working fluid has been used to make a nozzle to pipe weld on an active sour gas pipeline during the Canadian winter.
引用
收藏
页码:209S / 214S
页数:6
相关论文
共 50 条
  • [41] Effects of working temperature and fluid physical properties on heat transfer enhancement in conduction pumping: An experimental study
    Jafari, Moharram
    Farrokhi, Navid
    Esmaeilzadeh, Esmaeil
    INTERNATIONAL JOURNAL OF THERMAL SCIENCES, 2020, 156
  • [42] Influence of system size on the properties of a fluid adsorbed in a nanopore: Physical manifestations and methodological consequences
    Puibasset, Joel
    Kierlik, Edouard
    Tarjus, Gilles
    JOURNAL OF CHEMICAL PHYSICS, 2014, 141 (04):
  • [43] Influence of the base fluid on the thermo-physical properties of PV/T nanofluids with surfactant
    Al-Waeli, Ali H. A.
    Chaichan, Miqdam T.
    Sopian, K.
    Kazem, Hussein A.
    CASE STUDIES IN THERMAL ENGINEERING, 2019, 13
  • [44] Influence of nanomaterial morphology of guar-gum fracturing fluid, physical and mechanical properties
    Liu, Jiawen
    Wang, Shibin
    Wang, Chuan
    Zhao, Feng
    Lei, Shi
    Yi, Huiyong
    Guo, Jianchun
    CARBOHYDRATE POLYMERS, 2020, 234
  • [45] Thermodynamic Investigation of Effect of Variation in Thermo-Physical Properties of Gas Turbine Working Fluid on Cycle Performance
    Akram, Wasim
    Sanjay, Sanjay
    Hassan, M.A.
    Rathore, Souvik Singh
    Lecture Notes in Mechanical Engineering, 2022, : 209 - 228
  • [46] Thermodynamic Investigation of Effect of Variation in Thermo-Physical Properties of Gas Turbine Working Fluid on Cycle Performance
    Akram, Wasim
    Sanjay, Sanjay
    Hassan, M. A.
    Rathore, Souvik Singh
    RECENT TRENDS IN THERMAL ENGINEERING, ICCEMME 2021, 2022, : 209 - 228
  • [47] Influence of reservoir physical properties on guar gum fracturing fluid damage in unconventional tight reservoirs
    Chen, Luojun
    Gong, Runpu
    Wang, Jie
    Xu, Hualei
    Zhang, Liangjun
    PHYSICS OF FLUIDS, 2024, 36 (04)
  • [48] Study on the productivity and mechanism of physical field evolution of enhanced geothermal systems under different working fluid types and properties
    Cui, Hanbo
    Jiang, Xintong
    Mo, Zongyun
    Guo, Fei
    Guo, Shenghao
    Zhuang, Weitan
    Huang, Xiaojun
    AIP ADVANCES, 2024, 14 (05)
  • [49] Influence of emulsifiable concentrate formulation on the physical properties of the fluid, spray characteristics, and insecticide deposits on stored grains
    Vasquez-Castro, Javier A.
    de Baptista, Gilberto C.
    Gadanha, Casimiro D., Jr.
    Trevizan, Luiz R. P.
    JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY, 2007, 55 (09) : 3529 - 3534
  • [50] Influence of Hot Working Conditions on Mechanical Properties and Microstructures at Weld Zone of The Ti3Al/TC4 Dual Alloy
    Yao, Zekun
    Qin, Chun
    Guo, Hongzhen
    Cao, Jingxia
    MANUFACTURING SCIENCE AND ENGINEERING, PTS 1-5, 2010, 97-101 : 140 - +