چکیده مقاله
The National Iranian South Oil Company NISOC and TWI Persia Company carry out a pipeline integrity Direct Assessment D A mythology The assessment covers approximately 7 700 km of gas line as named E Branch in Ahwaz region with 16 pipe diameter, pipe material 5L X65, pipe wall thickness 19 05 mm, design pressure 250 BAR and Design temperature 60°C The pipeline was constructed and commissioned in 1978 and was externally coated with PVC cold wrapping The pipeline is not piggable, and located downstream of compressor station In this study it was supposed that for thick coatings, disbondment is in conjunction with coating defect 6 So, coating defects, that detectable with DCVG, wassupposed to primary factor in determining the SCC susceptible sites Approximately, in 80% of locations with coating defects of category 1, SCC has been found Same percentage of SCC was found for locations with category 2 Excavations and inspections for coating defects with category 3 weren’t adequate to extend the results So, when the main problem of the pipeline is SCC, all categories of the coating defects can be considerable
کلیدواژهها
نویسندگان
H. Gholami
Department of Manufacturing, Dezful Branch, Islamic Azad university, Dezful, Iran
M Jalali Azizpour
Department of Manufacturing, Dezful Branch, Islamic Azad university, Dezful, Iran
شیوه ارجاع
Gholami, H. and Jalali Azizpour, M,1393,SCC Direct Assessment on 16 gas line in Ahwaz region and considering the coa ng def ect as pr i ma r y factor to det er mi ne SCC,The 15th National Conference on Welding and Inspection and the Fourth National Conference on Non-Destructive Testing,Ahvaz
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مجموعه مقالات پانزدهمین کنفرانس ملی جوش و بازرسی و چهارمین کنفرانس ملی آزمایشهای غیرمخرب9 دی 1393 · اهواز