NDLI: Compressive and Tensile Strain Capacities of 48” X80 Line Pipes

Content Provider	The American Society of Mechanical Engineers (ASME) Digital Collection
Author	Tajika, Hisakazu Igi, Satoshi Sakimoto, Takahiro Endo, Shigeru Tsuyama, Seishi Muraoka, Ryuji Arakawa, Takekazu Suzuki, Nobuhisa
Copyright Year	2012
Abstract	This paper presents the results of experimental studies focused on the strain capacity of X80 linepipe. A full-scale bending tests of X80 grade, 48″ high-strain linepipes pressurized to 60% SMYS were conducted to investigate the compressive strain limit and tensile strain limit. The tensile properties Y/T ratios and uniform elongation of the pipes had variety. Three of four pipes are high strain pipes and these Y/T ratios are intentionally low with manufacturing method. One of these high-strain pipe was girth welded in its longitudinal center to investigate the effect of girth weld to strain capacity. The other was set as a conventional pipe that have higher Y/T ratio to make comparative study. The compressive strain limit focused on the critical strain at the formation of local buckling on the compression side of bending. After pipe reaches its endurable maximum moment, one large developed wrinkle and some small wrinkles on the pipe surface during bending deformation were captured relatively well from observation and strain distribution measurement. The tensile strain limit is discussed from the viewpoint of competition of two fracture phenomena: ductile crack initiation/propagation from an artificial notch at the HAZ of the girth weld, and strain concentration and rupture in the base material at the tension (opposite) side of the local buckling position.
Sponsorship	International Petroleum Technology Institute Pipeline Division
Starting Page	279
Ending Page	286
Page Count	8
File Format	PDF
ISBN	9780791845158
DOI	10.1115/IPC2012-90410
Volume Number	Volume 4: Pipelining in Northern and Offshore Environments; Strain-Based Design; Risk and Reliability; Standards and Regulations
Conference Proceedings	2012 9th International Pipeline Conference
Language	English
Publisher Date	2012-09-24
Publisher Place	Calgary, Alberta, Canada
Access Restriction	Subscribed
Subject Keyword	Fracture (process) Compression Deformation Rupture Ductile fracture Tension Fracture (materials) Manufacturing Pipes Buckling Elongation Tensile strength
Content Type	Text
Resource Type	Article

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