) ‫ﭘﮋوﻫﺸﻲ‬ ‫ﻳﺎدداﺷﺖ‬ (‫روح‬ ‫ﺳﺒﻚ‬ ‫ﻣﺠﻴﺪ‬) 1 (‫ﻫﺎﺷﻤﻲ‬ ‫ﺣﺠﺖ‬ ‫ﺳﻴﺪ‬) 2 (‫ﻓﺮاﻫﺎﻧﻲ‬ ‫ﻣﺤﻤﺪرﺿﺎ‬) 3 (‫ﭼﻜﻴﺪه‬ ‫ﻟﻮﻟﻪ‬ ‫ﻗﻄﻌﻪ‬ ‫دو‬ ‫اﺑﺘﺪا‬ ‫ﺗﺤﻘﻴﻖ‬ ‫اﻳﻦ‬ ‫در‬ ‫ي‬ 56 ‫اﻳﻜﺲ‬ ‫ﮔﺮﻳﺪ‬ ‫ﺑﺎ‬ (‫ﻣﺎرﭘﻴﭻ‬ ‫ﺟﻮش‬ ‫درز‬ ‫ﻧﻮع‬ ‫)از‬ ‫ﻓﻮﻻدي‬ ‫اﻳﻨﭻ‬ 70 ‫ﺿﺨﺎﻣﺖ‬ ‫و‬ 780 / 0 ‫ﺑﺮ‬ ‫اﻳﻨﭻ‬ ‫وﻳﮋه‬ ‫دﺳﺘﻮراﻟﻌﻤﻞ‬ ‫اﺳﺎس‬ ‫ي‬ ‫آن‬ ‫از‬ ‫ﭘﺲ‬ .‫ﮔﺮدﻳﺪ‬ ‫ﺟﻮﺷﻜﺎري‬ ‫اﻳﺮان‬ ‫ﮔﺎز‬ ‫ﻣﻠﻲ‬ ‫ﺷﺮﻛﺖ‬ ، ‫آزﻣﻮن‬ ‫ﻛﺮﻧﺶ‬ ‫ﺳﻨﺠ‬ ‫داﺧﻠﻲ‬ ‫و‬ ‫ﺧﺎرﺟﻲ‬ ‫ﺳﻄﻮح‬ ‫روي‬ ‫در‬ ‫ﺳﻮراخ‬ ‫ﻲ‬ ‫اﺳﺘﺎﻧﺪارد‬ ‫اﺳﺎس‬ ‫ﺑﺮ‬ ‫ﻟﻮﻟﻪ‬ ASTM E 837 .‫ﮔﺮدﻳﺪ‬ ‫ﻣﺤﺎﺳﺒﻪ‬ ‫اﻃﻼﻋﺎت‬ ‫اﻳﻦ‬

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... ز‬ ‫اﺳﺘﻔﺎده‬ ‫ﺑﺎ‬ ‫ﭘﺴﻤﺎﻧﺪ‬ ‫ﺗﻨﺶ‬ ‫ﻣﻘﺎدﻳﺮ‬ ‫ﺳﭙﺲ‬ .‫ﺷﺪ‬ ‫اﻧﺠﺎم‬ ‫ﻧﺸﺎن‬ ‫ﺗﺠﺮﺑﻲ‬ ‫ﻧﺘﺎﻳﺞ‬ ‫ﻣﻲ‬) ‫ﻛﺸﺸﻲ‬ ‫ﭘﺴﻤﺎﻧﺪ‬ ‫ﺗﻨﺶ‬ ‫ﺣﺪاﻛﺜﺮ‬ ‫دﻫﺪ‬ 318 ‫ﻣﮕﺎﭘﺎ‬ ‫ﺑ‬ ‫ﻟﻮﻟﻪ‬ ‫ﺧﺎرﺟﻲ‬ ‫ﺳﻄﺢ‬ ‫ﻣﺤﻴﻄﻲ‬ ‫راﺳﺘﺎي‬ ‫در‬ ‫ﺟﻮش‬ ‫درز‬ ‫ﻣﺮﻛﺰ‬ ‫در‬ (‫ﺳﻜﺎل‬ ‫ﻪ‬ ‫ﻣﻲ‬ ‫وﺟﻮد‬ ‫ﻫﻢ‬ .‫آﻳﺪ‬ ‫ﭼﻨﻴﻦ‬) ‫ﻓﺸﺎري‬ ‫ﭘﺴﻤﺎﻧﺪ‬ ‫ﺗﻨﺶ‬ ‫ﺣﺪاﻛﺜﺮ‬ 137 ‫ﻓﺎﺻﻠﻪ‬ ‫در‬ ‫و‬ ‫ﻟﻮﻟﻪ‬ ‫داﺧﻠﻲ‬ ‫ﺳﻄﺢ‬ ‫ﻣﺤﻮري‬ ‫و‬ ‫ﻣﺤﻴﻄﻲ‬ ‫راﺳﺘﺎﻫﺎي‬ ‫در‬ (‫ﻣﮕﺎﭘﺎﺳﻜﺎل‬ ‫ي‬ 30 ‫ﻣﻴﻠﻲ‬ ‫ﺟﻮش‬ ‫ﻣﺮﻛﺰ‬ ‫از‬ ‫ﻣﺘﺮ‬ .‫دارد‬ ‫ﻗﺮار‬ ‫واژه‬ ‫ﻫﺎي‬ ‫ﻛﻠﻴﺪي‬ ‫ﭘﺎﺳﻪ‬ ‫ﭼﻨﺪ‬ ‫ﺟﻮش‬ ،‫ﭘﺴﻤﺎﻧﺪ‬ ‫ﺗﻨﺶ‬ ‫ي‬ ‫ﻟﻮﻟﻪ‬ ،‫ﻣﺤﻴﻄﻲ‬ ‫ي‬ ،‫ﮔﺎز‬ ‫اﻧﺘﻘﺎل‬ ‫ﻓﻮﻻدي‬ ‫ﻛﺮﻧﺶ‬ ‫ﺳﻨﺠ‬ ،‫ﺳﻮراخ‬ ‫ﻲ‬ API X70. Abstract In this paper, two API X70 steel pipes (with spiral seam weld) of 56 inch outside diameter and 0.780 inch wall thickness were girth welded first. Next, hole drilling tests were conducted for strain measurement on the surfaces of the pipes. The values of residual stresses on the internal and external surfaces of the pipe were determined, from strain data using ASTM 837 standard. The experimental data showed that the maximum tensile residual stress (318MPa) was located on the centre line of the weld gap on the pipe outer surface alongside with the pipe hoop direction. Moreover, the maximum compressive (hoop and axial) residual stresses (137MPa) occurred on the pipe inner surface at 30mm from the centre line of the weld gap.