Effect of multiple repairs in girth welds of pipelines on the mechanical properties

Vega, O.; Hallen, J.M.; Villagomez, Agusti´n; Contreras, A.

doi:10.1016/j.matchar.2008.01.011

Cited by 51 publications

(38 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…A comparison of the individual results to the maximum and minimum shown in Table 5 demonstrates that all the data could be from the same population; no plate configuration is different from the group. The impact toughness of the weld repair mock-up HAZ shows the lowest value at 59, but still possesses reasonable toughness as shown by other researchers [1,2]. Vega et al [1] examined the mechanical properties of API 1104 and ASME Section IX as applicable to welded pipes, fabricated from seamless API X52 PSL2 metal.…”

Section: Charpy V-notch Testsmentioning

confidence: 91%

“…The impact toughness of the weld repair mock-up HAZ shows the lowest value at 59, but still possesses reasonable toughness as shown by other researchers [1,2]. Vega et al [1] examined the mechanical properties of API 1104 and ASME Section IX as applicable to welded pipes, fabricated from seamless API X52 PSL2 metal. Their study showed that after four (4) repair welds a slight degradation in mechanical properties was noted, but all results were still acceptable.…”

Section: Charpy V-notch Testsmentioning

confidence: 91%

See 1 more Smart Citation

Assessment of Weld Embrittlement in A516 Steel Due to Multiple Repair Welds

Reitz

2011

J Fail. Anal. and Preven.

View full text Add to dashboard Cite

A 3-million gallon petroleum storage tank was fabricated in the Midwest using A516 steel. The initial fabrication schedule had become compressed; welders worked hurriedly and did not produce good welds. Numerous welds had to be repaired via grinding and rewelding. The quality of the steel near the welds were questioned regarding their ductility; it was thought that the material had become embrittled and would fail prematurely in a catastrophic manner and be more susceptible to poor performance during the winters (À25°F) because of welds being repaired up to six (6) times. The contracting company requested that the repair welds be evaluated and compared to the base metal and the original welds. The repair welds could not be removed from the structure. Therefore, the welding vendor was requested to provide mock-up welds and mock-up repair welds that simulated the welding process used during fabrication. The welding vendor provided base metal, mock-up of in-service weld, and mock-up of in-service repair weld for metallographic evaluation and mechanical testing. The vendor also provided hardness data for in-service weld and in-service repair weld along with hardness data for mock-up of in-service weld and mock-up of in-service repair weld. The mock-up welds adequately represent the production welds (original welds and repaired welds). All the test results indicate that the repaired welds are of similar quality as the original weld.

show abstract

Section: Charpy V-notch Testsmentioning

confidence: 91%

Section: Charpy V-notch Testsmentioning

confidence: 91%

Assessment of Weld Embrittlement in A516 Steel Due to Multiple Repair Welds

Reitz

2011

J Fail. Anal. and Preven.

View full text Add to dashboard Cite

show abstract

“…Considering this assumption, this it is the reason for which the second welding repair presents the best mechanical behavior, for both, in air and in NACE solution. The microstructure as well as the mechanical properties obtained for the different weld repair conditions were shown elsewhere (Vega et al, 2008). Micrographs of the fracture surface specimens were shown elsewhere (Vega et al, 2009).…”

Section: 1 Slow Strain Rate Tests Carried Out In Nace Solutionmentioning

confidence: 99%

Assessment of Stress Corrosion Cracking on Pipeline Steels Weldments Used in the Petroleum Industry by Slow Strain Rate Tests

Contreras¹,

Salazar²,

Albiter³

et al. 2011

Arc Welding

Self Cite

View full text Add to dashboard Cite

“…Furthermore, weld repair can be used where anomalies are introduced through the service life of the component, thus helping to extend the operative life of components. As these are extensively adopted in the nuclear, petrochemical and power generation industries, the main volume of research in this area is related to either aged or deteriorated materials in the case of pipe geometries [1][2][3][4]. Although the understanding about repair processes is not extensive, the common approach consists of applying standard established procedures.…”

Section: Introductionmentioning

confidence: 99%

Residual stress analysis and finite element modelling of repair-welded titanium sheets

et al. 2017

View full text Add to dashboard Cite

An innovative finite element modelling approach has been tested to investigate the effects of weld repair of thin sheets of titanium alloy, taking into account a preexisting stress field in the components. In the case study analysed, the residual stress fields due to the original welds are introduced by means of a preliminary sequentiallycoupled thermo-mechanical analysis and considered as preexisting stress in the sheets for the subsequent repair weld simulation. Comparisons are presented between residual stress predictions and experimental measurements available from the literature, with the aim of validating the numerical procedure. As a destructive sectioning technique was used in the reference experimental measurements, an investigation is also presented on the use of the element deactivation strategy when adopted to simulate material removal. Although the numerical tool is an approximate approach to simulate the actual material removal, the strategy appears to predict a physical strain relaxation and stress redistribution in the remaining part of the component. The weld repair modelling strategy and the element deactivation tool adopted to simulate the residual stress measurement technique are shown to predict residual stress trends which are

show abstract

Effect of multiple repairs in girth welds of pipelines on the mechanical properties

Cited by 51 publications

References 11 publications

Assessment of Weld Embrittlement in A516 Steel Due to Multiple Repair Welds

Assessment of Weld Embrittlement in A516 Steel Due to Multiple Repair Welds

Assessment of Stress Corrosion Cracking on Pipeline Steels Weldments Used in the Petroleum Industry by Slow Strain Rate Tests

Residual stress analysis and finite element modelling of repair-welded titanium sheets

Contact Info

Product

Resources

About