Strain-based design criteria of pipelines

Liu, Bing; Liu, X.J.; Zhang, Zeyu

doi:10.1016/j.jlp.2009.07.010

Cited by 63 publications

(20 citation statements)

References 10 publications

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“…The multi-phase X-100 base plate used in this work has excellent mechanical properties (see Table 3) including uniform elongation more than 7.5% and Y/S ratio lower than 0.8, meeting the requirement of the strain-based design [14]. Multi-phase microstructure of this base plate is shown in Fig.…”

Section: Mechanical Propertiesmentioning

confidence: 88%

Investigation on the microstructure and toughness of coarse grained heat affected zone in X-100 multi-phase pipeline steel with high Nb content

You

Chen

Wenjin

et al. 2012

Materials Science and Engineering: A

107

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Section: Mechanical Propertiesmentioning

confidence: 88%

Investigation on the microstructure and toughness of coarse grained heat affected zone in X-100 multi-phase pipeline steel with high Nb content

You

Chen

Wenjin

et al. 2012

Materials Science and Engineering: A

107

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“…To ensure pipeline integrity in environmentally sensitive areas and overall cost effectiveness, a strain-based design approach needs to be considered. Low fluctuations in strength, low yield ratios, and high uniform elongation are often used as new requirements for pipeline designs to meet a strain-based design [3].…”

Section: Introductionmentioning

confidence: 99%

Controlling Variability in Mechanical Properties of Plates by Reducing Centerline Segregation to Meet Strain-Based Design of Pipeline Steel

Guo

Liu

Wang

et al. 2019

Metals

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Low variability in mechanical properties is required for pipeline project designs to meet a strain-based design, which is used in regions of large ground movements. The objective of this study is to elucidate the influence of centerline segregation in continuously cast slab on variability in the mechanical property of pipeline steel, and controlling centerline segregation can meet the requirements of a strain-based design. Mannesmann rating method was used to evaluate the degree of segregation of two slabs and its effect on variability in mechanical properties of corresponding plates. Microstructural characterization indicated that bainite/martensite was formed in a segregated area where the content of C and Mn enriched. The mechanical property results indicated that controlling the degree of centerline segregation can reduce tensile strength variability and improve ductile-brittle transition temperature (DBTT).

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“…These increasing toughness requirements mainly result from an extrapolation of conventional design principles into the range of higher yield strength, so that it can be concluded that these rules demand for an over‐conservative design when modern HSLA steels shall be employed. As a consequence, efforts are recently undertaken in order to improve the European rules towards a strain‐based design, for example, for pipelines, pressure vessels or steel constructions in civil engineering . Most probably, the obstacles for the application of high strength steels can be significantly reduced once the strain‐based design approaches have been transferred into the relevant codes and standards.…”

Section: Introductionmentioning

confidence: 99%

Predicting lower bound damage curves for high‐strength low‐alloy steels

Münstermann

Schruff

Döbereiner

et al. 2013

Fatigue Fract Eng Mat Struct

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A B S T R A C T Hindered by the distinctive toughness requirements of the current European standards, the high-strength low-alloy (HSLA) steels are rarely applied to the pressure vessels industry. The reason is that the design rules specified by the standards define local plastic deformation as limit state. This results in an over-conservative application of materials. To achieve an effective, economical and energy-efficient use of HSLA steels, a strain-based criterion, the damage curve, which considers crack initiation instead of the beginning of plastic deformation as limit state, is proposed in this study for the improved design rules. In the view of the interaction of microstructure and mechanical properties of materials, the new design rule is derived on the basis of the correlation of microstructural features of HSLA steels with the micromechanical damage models. The experimental verification of the result is furthermore investigated with sufficient agreement so that the general applicability of the procedure can be expected. However, further studies for a reliable parameter calibration are necessary.A 5 ¼ total elongation A g ¼ uniform elongation c 1 , c 2 ¼ fit parameters for damage curve EDX ¼ energy-dispersive X-ray f c ¼ critical void volume fraction in GTN model f f ¼ void volume fraction at macroscopic failure in GTN model f N ¼ fraction of void nucleating particles in GTN model f* ¼ effective void volume fraction in GTN modelstrain controlled void nucleation in GTN model T 27J ¼ Charpy transition temperature TEM ¼ transmission electron microscopy e f ¼ equivalent plastic strain to ductile fracture e i ¼ equivalent plastic strain for crack initiation e N ¼ characteristic strain of void nucleation ep ¼ equivalent plastic strain to provoke ductile crack initiation under hydrostatic pressure

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Strain-based design criteria of pipelines

Cited by 63 publications

References 10 publications

Investigation on the microstructure and toughness of coarse grained heat affected zone in X-100 multi-phase pipeline steel with high Nb content

Investigation on the microstructure and toughness of coarse grained heat affected zone in X-100 multi-phase pipeline steel with high Nb content

Controlling Variability in Mechanical Properties of Plates by Reducing Centerline Segregation to Meet Strain-Based Design of Pipeline Steel

Predicting lower bound damage curves for high‐strength low‐alloy steels

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