Shear strength distribution of district heating pipe under accelerated aging condition with respect to PU foam density
The European standard EN253 for bonded pipe systems for District Heating(DH) using polyurethane foam thermal insulation applied to bond to a steel service pipe and a polyethylene casing has been proposed to validate the residual life and soundness of an aged DH pipe by simultaneously presenting a sh...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-06-01
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| Series: | Polymer Testing |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S0142941822000927 |
| _version_ | 1818274714344226816 |
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| author | Hyung-gyu Kim Jooyong Kim Hae-Yong Lee Jonghun Yoon |
| author_facet | Hyung-gyu Kim Jooyong Kim Hae-Yong Lee Jonghun Yoon |
| author_sort | Hyung-gyu Kim |
| collection | DOAJ |
| description | The European standard EN253 for bonded pipe systems for District Heating(DH) using polyurethane foam thermal insulation applied to bond to a steel service pipe and a polyethylene casing has been proposed to validate the residual life and soundness of an aged DH pipe by simultaneously presenting a shear strength ratio greater than 45% relative to the initial shear strength and the absolute values of the shear strength larger than 0.12 MPa. However, it is difficult to represent a reliable distribution of the shear strength ratio owing to the non-uniformity of the PU foam density along the length of the pipe. A representing method is proposed for the distribution of the shear strength ratio of the aged DH pipe by correlating the distribution of the shear strength with the PU foam density. Besides demonstrating reliability in the distribution of the shear strength ratio with small variation, the proposed method provides excellent prediction in the shear strength ratio when the initial shear strength has not been maintained since it was buried long ago by extrapolating degrading characteristics of the aged DH pipe. |
| first_indexed | 2024-12-12T22:18:15Z |
| format | Article |
| id | doaj.art-8cb20eaddc014f5dbc3a93fa1a43c16d |
| institution | Directory Open Access Journal |
| issn | 0142-9418 |
| language | English |
| last_indexed | 2024-12-12T22:18:15Z |
| publishDate | 2022-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Polymer Testing |
| spelling | doaj.art-8cb20eaddc014f5dbc3a93fa1a43c16d2022-12-22T00:10:00ZengElsevierPolymer Testing0142-94182022-06-01110107567Shear strength distribution of district heating pipe under accelerated aging condition with respect to PU foam densityHyung-gyu Kim0Jooyong Kim1Hae-Yong Lee2Jonghun Yoon3Department of Mechanical Design Engineering, Hanyang University, 222, Wangsimni-ro, Seongdonggu, Seoul, 04763, Republic of KoreaFrontier Research & Training Institute, Korea District Heating Corporation (KDHC), 92, Gigok-ro, Giheung-gu, Yongin-si, Gyeonggi-do, 17099, Republic of KoreaFrontier Research & Training Institute, Korea District Heating Corporation (KDHC), 92, Gigok-ro, Giheung-gu, Yongin-si, Gyeonggi-do, 17099, Republic of KoreaDepartment of Mechanical Engineering, BK21 FOUR ERICA-ACE Center, Hanyang University, 55, Hanyangdaehak-ro, Sangnok-gu, Ansan-si, Gyeonggi-do, 15588, Republic of Korea; Corresponding author.The European standard EN253 for bonded pipe systems for District Heating(DH) using polyurethane foam thermal insulation applied to bond to a steel service pipe and a polyethylene casing has been proposed to validate the residual life and soundness of an aged DH pipe by simultaneously presenting a shear strength ratio greater than 45% relative to the initial shear strength and the absolute values of the shear strength larger than 0.12 MPa. However, it is difficult to represent a reliable distribution of the shear strength ratio owing to the non-uniformity of the PU foam density along the length of the pipe. A representing method is proposed for the distribution of the shear strength ratio of the aged DH pipe by correlating the distribution of the shear strength with the PU foam density. Besides demonstrating reliability in the distribution of the shear strength ratio with small variation, the proposed method provides excellent prediction in the shear strength ratio when the initial shear strength has not been maintained since it was buried long ago by extrapolating degrading characteristics of the aged DH pipe.http://www.sciencedirect.com/science/article/pii/S0142941822000927District heatingPolyurethane foam densityChemical degradationAccelerated aging testEN253 |
| spellingShingle | Hyung-gyu Kim Jooyong Kim Hae-Yong Lee Jonghun Yoon Shear strength distribution of district heating pipe under accelerated aging condition with respect to PU foam density Polymer Testing District heating Polyurethane foam density Chemical degradation Accelerated aging test EN253 |
| title | Shear strength distribution of district heating pipe under accelerated aging condition with respect to PU foam density |
| title_full | Shear strength distribution of district heating pipe under accelerated aging condition with respect to PU foam density |
| title_fullStr | Shear strength distribution of district heating pipe under accelerated aging condition with respect to PU foam density |
| title_full_unstemmed | Shear strength distribution of district heating pipe under accelerated aging condition with respect to PU foam density |
| title_short | Shear strength distribution of district heating pipe under accelerated aging condition with respect to PU foam density |
| title_sort | shear strength distribution of district heating pipe under accelerated aging condition with respect to pu foam density |
| topic | District heating Polyurethane foam density Chemical degradation Accelerated aging test EN253 |
| url | http://www.sciencedirect.com/science/article/pii/S0142941822000927 |
| work_keys_str_mv | AT hyunggyukim shearstrengthdistributionofdistrictheatingpipeunderacceleratedagingconditionwithrespecttopufoamdensity AT jooyongkim shearstrengthdistributionofdistrictheatingpipeunderacceleratedagingconditionwithrespecttopufoamdensity AT haeyonglee shearstrengthdistributionofdistrictheatingpipeunderacceleratedagingconditionwithrespecttopufoamdensity AT jonghunyoon shearstrengthdistributionofdistrictheatingpipeunderacceleratedagingconditionwithrespecttopufoamdensity |