ANALYSIS OF TOWED SUBSEA PIPELINES IN RANDOM SEA

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Mohammadnia Saeid; akhshik Siamak

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Seminar Paper

Paper Information

Seminar: INTERNATIONAL CONFERENCE ON COASTS, PORTS AND MARINE STRUCTURES (ICOPMAS) PORTS & MARITIME ORGANIZATION
Year:2010 | Issue:9

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Title

ANALYSIS OF TOWED SUBSEA PIPELINES IN RANDOM SEA

Author(s)

Mohammadnia Saeid | akhshik Siamak | Issue Writer Certificate

Keywords

PIPE LAYING

SENSITIVITY ANALYSIS

FATIGUE

TOWING

JONSWAP

RANDOM WAVE

Abstract

INTRODUCTION: OFFSHORE PIPELINES ARE CONVENTIONALLY INSTALLED USING EITHER LAY BARGES OR REEL BARGES. IN THE FIRST CASE, PREFABRICATED PIPELINE SEGMENTS OF AROUND 12 M IN LENGTH ARE WELDED TOGETHER ON THE BARGE AS THE PIPELINE IS BEING LAID. IN THE SECOND CASE, UP TO 25 KM OF PREFABRICATED PIPELINE IS WOUND ON A LARGE DIAMETER REEL AND THE LAYING OPERATION CONSISTS OF UNWINDING THE REEL AND STRAIGHTENING THE `PIPE. THE REEL BARGE METHOD AVOIDS THE NEED FOR LARGE SCALE OFFSHORE WELDING OPERATIONS BUT HAS THE DISADVANTAGE OF BEING APPLICABLE ONLY TO RELATIVELY SMALL DIAMETER PIPELINES. A THIRD APPROACH, WHICH IS APPLICABLE TO PIPELINES OF ARBITRARY DIAMETER, IS TO FABRICATE THE PIPELINE ON SHORE AND THEN TOW THE RESULTING LINES TO THE OFFSHORE SITE.

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APA: Copy

Mohammadnia, Saeid, & akhshik, Siamak. (2010). ANALYSIS OF TOWED SUBSEA PIPELINES IN RANDOM SEA. INTERNATIONAL CONFERENCE ON COASTS, PORTS AND MARINE STRUCTURES (ICOPMAS). SID. https://sid.ir/paper/907112/en

Vancouver: Copy

Mohammadnia Saeid, akhshik Siamak. ANALYSIS OF TOWED SUBSEA PIPELINES IN RANDOM SEA. 2010. Available from: https://sid.ir/paper/907112/en

IEEE: Copy

Saeid Mohammadnia, and Siamak akhshik, “ANALYSIS OF TOWED SUBSEA PIPELINES IN RANDOM SEA,” presented at the INTERNATIONAL CONFERENCE ON COASTS, PORTS AND MARINE STRUCTURES (ICOPMAS). 2010, [Online]. Available: https://sid.ir/paper/907112/en

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