کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9707571 1466158 2005 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Experimental validation of the influence of lamination defects in electrical resistance seam welded pipelines
موضوعات مرتبط
مهندسی و علوم پایه سایر رشته های مهندسی مهندسی مکانیک
پیش نمایش صفحه اول مقاله
Experimental validation of the influence of lamination defects in electrical resistance seam welded pipelines
چکیده انگلیسی
Experimental results from seven strain gaged instrumented hydrostatic tests on ex-service tubes from a 350 mm diameter, 6.3 mm thickness electrical resistance seam welded oil pipeline are presented. Lamination defects had been detected in these sectors by means of transversal magnetic flow in-line inspection and the FAST ultrasonic technique. Five tubes failed in the weld, these yielded the lowest burst pressures. The largest laminations found in the base material reduced the burst pressure by less than 25%. Defects propagated in the weld reduced the burst strength by up to 50%. Fracture mechanics modelling of the most representative defect shows that an inclined lamination defect with a through-thickness depth of up to 3 mm is not critical; test results show that this prediction is conservative. These results show that the location of the defect is more important than its size, the main reason being the low toughness of the weld. The results of this study confirm the validity of the restrictions of Section 8 of API RP 579.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Pressure Vessels and Piping - Volume 82, Issue 12, December 2005, Pages 896-904
نویسندگان
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