Research and Development > Technical Report > No.12 Special Issue on “Steel Pipes and Tubes” and “Stainless Steel” > Strain Capacity of High-Strength Line Pipes

No.12 Special Issue on “Steel Pipes and Tubes” and “Stainless Steel”

Strain Capacity of High-Strength Line Pipes

SUZUKI Nobuhisa     KONDO Joe     SHIMAMURA Junji

Abstract

Two compression and two bending tests using X80 high-strain line pipes with 30 inches (762 mm) in outside diameter were conducted to investigate its compression capacity and bending capacity. The compression test revealed that the pipes had the critical compressive strain of 0.90 and 0.78% and the bending test clarified that the 2OD (two times outside diameter) average critical compressive strains were 2.40 and 2.15% and the 1OD average were 2.67 and 2.28%, respectively. The test results proved that X80 high-strain linepipes satisfy requirements from pipeline projects and ensure pipeline integrity in seismic and permafrost areas.

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