Effect of hygrothermal conditioning on the mechanical and thermal properties of epoxy grouts for offshore pipeline rehabilitation

Shamsuddoha, Md.; Islam, Mainul; Aravinthan, Thiru; Ferdous, Wahid; Djukic, Luke P.

doi:10.3934/matersci.2016.3.832

Cited by 10 publications

(7 citation statements)

References 20 publications

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“…Therefore, high performance of grout in terms of tensile strength is indispensable to provide the additional load bearing capacity and thus a better load-sharing mechanism in pipeline repair [28]. According to Mendis [29], Lim et al [30] and Shamsuddoha et al [31], the tensile strength within the range of 19 to 48 MPa has the potential to be used in structural rehabilitation and it has been employed as a benchmark to assess the suitability of epoxy grout for pipeline repair. Hence, the tensile strength of the modified epoxy grout is sufficient for structural repair with a value of 32 MPa.…”

Section: Tensile Propertiesmentioning

confidence: 99%

“…This behaviour implies that the bonding between the matrix and the steel coupon is much stronger than the strength of the matrix itself [33]. Failure pattern of shear test The issue related to the bonding strength in the composite pipeline repair have been studied by several researchers and they have emphasized that one of the important factors affecting the performance of composite repair system is the bonding strength of damaged pipeline with infill material or composite wrap [30,31]. As stated in ISO/TS 24817 [36] and ASME-PCC2 [37], the requirement for shear strength of the adhesive composite bond to the substrate should at least 4 MPa and 5 MPa.…”

Section: Tensile Propertiesmentioning

confidence: 99%

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Mechanical Properties of Graphene-Modified Epoxy Grout for Pipeline Composite Repair

Zainal

Arifin

Zardasti

et al. 2018

IJIE

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Section: Tensile Propertiesmentioning

confidence: 99%

Section: Tensile Propertiesmentioning

confidence: 99%

Mechanical Properties of Graphene-Modified Epoxy Grout for Pipeline Composite Repair

Zainal

Arifin

Zardasti

et al. 2018

IJIE

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“…Considering the above reasons, polymer-based materials for repairs of underground pressurized structures have become the subject of many publications. Regarding the development and qualification of selection of composite materials for pipeline renovations, such studies as [ 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ] were analyzed. The research focuses on improving the existing methodologies or developing new ones, such as, but not limited to [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ].…”

Section: Introductionmentioning

confidence: 99%

Analytical Model and Numerical Analysis of Composite Wrap System Applied to Steel Pipeline

et al. 2021

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Composite overwraps are a cost-effective repair technology, appropriate for corrosion defects, dents, and gouges for both onshore and offshore steel pipelines. The main benefit of polymer-based sleeves is safe installation without taking the pipeline out of service. This paper presents a new calculation procedure proposed in the form of an algorithm for the sizing of composite repairs of corroded pipelines when the sleeve is applied at zero internal pressure. The main objective of the presented methodology is determination of the effective thickness of the composite repair without its overestimation or underestimation. The authors used a non-linear finite element method with constitutive models allowing analysis of the steel, putty, and composite structures. The validation of the results of numerical computations compared to the experimental ones showed an appropriate agreement. The numerical calculations were applied to compare the analytical results in relation to those obtained by the standards ASME PCC-2 or ISO/TS 24817. The comparison showed that the proposed solution confirmed its effectiveness in reducing the thickness of the sleeve significantly, thus, showing that the current industrial standards provide a considerably excessive composite wrap around the steel pipe corroded area, which leads to an unnecessary increase in the repair costs.

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“…Figure 1 shows a typical composite repair system for pipeline rehabilitation. Previously, most of the researchers assume that the function of infill material is to fill the damaged area and creating a smooth surface rather than sharing the load [15][16][17][18]. This has led to the negligence of the contribution of putty and performance of wrapper became the main focus in the past research works.…”

Section: Introductionmentioning

confidence: 99%

Modelling failure pressure of pipeline composite repair design using finite element analysis incorporating putty’s contribution

et al. 2019

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A composite repair system which consists of Fibre Reinforced Polymer (FRP) and putty as infill material has been proven effective in repairing pipeline system as it can structurally reinforce the damaged steel pipes and potentially prevent external corrosion. However, previous studies including the design codes are neglecting the contribution of putty as they assume putty is only functioned to fill the corroded section. A recent study has pointed out that putty is not only limited to transfer the load, but it can serve as a load bearing component. Thus, the purpose of this research is to model the contribution of putty in terms of load bearing capacity through finite element analysis (FEA) and mathematical modelling. Two finite elements models were utilized to study the performance of two different material properties of putties used to repair externally corroded pipeline followed by regression analysis. It was found that by incorporating the strength contribution of putty, there are potential to increase the burst pressure by about 5%. The finding of this research is significant as it can serve as a stepping stone towards design optimization of pipeline rehabilitation.

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Effect of hygrothermal conditioning on the mechanical and thermal properties of epoxy grouts for offshore pipeline rehabilitation

Cited by 10 publications

References 20 publications

Mechanical Properties of Graphene-Modified Epoxy Grout for Pipeline Composite Repair

Mechanical Properties of Graphene-Modified Epoxy Grout for Pipeline Composite Repair

Analytical Model and Numerical Analysis of Composite Wrap System Applied to Steel Pipeline

Modelling failure pressure of pipeline composite repair design using finite element analysis incorporating putty’s contribution

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