Designing against ductile fracture propagation in very high strength steel gas pipelines: A review

2000 ◽  
pp. 235-252 ◽  
Author(s):  
G. Buzzichelli
Keyword(s):  
Ductile Fracture ◽  
High Strength Steel ◽  
Fracture Propagation ◽  
High Strength ◽  
Gas Pipelines ◽  
Very High

Ductile Fracture Control for High Strength Steel Pipelines

2006 ◽  
Author(s):  
Andrea Fonzo ◽  
Andrea Meleddu ◽  
Giuseppe Demofonti ◽  
Michele Tavassi ◽  
Brian Rothwell
Keyword(s):  
Ductile Fracture ◽  
High Strength Steel ◽  
Driving Force ◽  
Empirical Relationship ◽  
Fracture Propagation ◽  
High Strength ◽  
Operating Conditions ◽  
Resistance Force ◽  
Fracture Control ◽  
Material Fracture

The determination of the toughness values required for arresting ductile fracture propagation has been historically based on the use of models whose resulting predictions can be very unreliable when applied to new high strength linepipe materials (≥X100) and/or different operating conditions. In addition, for the modern high strength steels a methodology for determining the material fracture resistance for arresting running shear fracture starting from laboratory data is still lacking. The work here presented (developed within a PRCI sponsored project) deals with the use of CSM’s proprietary PICPRO® Finite Element code to develop methodologies for ductile fracture propagation control in high grade steel pipes. The relationships providing the maximum crack driving force which can be experienced in a pipe operated at known conditions have been determined, for different types of gas. On the other side, an empirical relationship has been found to correlate the critical Crack Tip Opening Angle (CTOA) determined by laboratory testing, to the critical CTOA on pipe (which represents the material fracture propagation resistance) with the aid of devoted simulations of past full-scale burst tests. By comparing Driving Force and Resistance Force, ductile fracture control for high strength steel pipelines can be achieved.

Fracture propagation control in very high strength gas pipelines

2000 ◽  
Vol 97 (11) ◽  
pp. 1409-1416 ◽  
Author(s):  
G. Buzzichelli ◽  
L. Scopesi
Keyword(s):  
Fracture Propagation ◽  
High Strength ◽  
Gas Pipelines ◽  
Very High

DOCOL 100W

Alloy Digest ◽  
2003 ◽  
Vol 52 (7) ◽  
Keyword(s):  
Physical Properties ◽  
Tensile Properties ◽  
High Strength Steel ◽  
High Strength ◽  
Bend Strength ◽  
Very High

Abstract Docol 100W is a very-high-strength steel that is used for transportation products. This datasheet provides information on composition, physical properties, tensile properties, and bend strength. It also includes information on joining. Filing Code: SA-516. Producer or source: SSAB Swedish Steel Inc.

DOMEX 110XF

Alloy Digest ◽  
2003 ◽  
Vol 52 (5) ◽  
Keyword(s):  
Fracture Toughness ◽  
Physical Properties ◽  
Tensile Properties ◽  
High Strength Steel ◽  
Civil Engineering ◽  
High Strength ◽  
Heat Treating ◽  
Bend Strength ◽  
Structural Components ◽  
Very High

Abstract Domex 110XF is a very-high-strength steel that is used for automotive and civil engineering structural components. This datasheet provides information on composition, physical properties, hardness, tensile properties, and bend strength as well as fracture toughness. It also includes information on heat treating and joining. Filing Code: SA-512. Producer or source: SSAB Swedish Steel Inc.

TAP Project

2004 ◽  
Author(s):  
Carlo Maria Spinelli ◽  
Furio Marchersani
Keyword(s):  
High Pressure ◽  
High Strength Steel ◽  
High Strength ◽  
Innovation Activity ◽  
Long Distance ◽  
Gas Network ◽  
Research And Innovation ◽  
Gas Market ◽  
High Pressure Pipeline ◽  
Very High

International gas market development is towards very long transportation distances (3000–6000 km); the only suitable onshore technology to conjugate economics, large amount of gas conveyed and possibility to exploit remote gas fields appears to be the Very High Pressure (P > 14 MPa), Very High Strength Steel (Steel grade X100 API 5L [1] equivalent) option. Eni Group is going to sponsor a 3 years long project, called TAP (Trasporto gas Alta Pressione) [High Pressure gas Transportation] aimed to demonstrate: • economic evaluation; • technology reliability; • real possibility to build Very High Pressure Pipeline. The project itself is framed into five logical areas: • Evaluation of the applicability of alternative technological solution in extreme enterprise; • Technological innovation, mainly within Eni Group; • FEED (Front End Engineering Development) for strategic route gas pipeline and comparison with LNG option; • Demonstrative construction of a High Strength Steel (X80) pipeline section on Snam Rete Gas Network in Italy; • Demonstrative construction of a Very High Strength Steel (X100 API equivalent) provisioning pilot section pipeline. To achieve this object Eni has involved: • Eni Gas & Power Division as Business Developer; • Snamprogetti as Technology Developer; • Aquater, Enidata, Enitecnologie, Saipem, Snam Rete Gas as specific item expertises; • CSM and Universita` di Bergamo as high qualified partners for lab and full scale testing; • Pipe steel makers and coating producers as fundamental partners to develop new solutions. TAP, within Eni Group, is the final step of a long development research and innovation activity started 8 years ago with two explorative “Long distance pipeline High Grade Steel” projects on Very High Strength Steel performances (strength, toughness, weldability) carried out mainly with the support of Snam, Snamprogetti and Saipem. TAP final goal is to collect, transfer, develop all the possible technological solutions to be ready for building “The pipeline network for Very High Pressure Transportation”.

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