EFFECT OF PUTTY PROPERTIES IN REPAIRING CORRODED PIPELINE: A FINITE ELEMENT ANALYSIS
DOI:
https://doi.org/10.11113/mjce.v28.15997Keywords:
Composite repair, geometrical defect, infill properties, pipeline.Abstract
Underground pipelines are the most preferable way to transport oil and gas over a long distance. These steel pipelines often suffered from several deteriorations including corrosion. Corrosion causes the outer lining of a pipeline to thin and subsequently reducing pipeline strength. In order to prevent this loss of strength, repair is required. Composite wrap repair is a technique that can be used to repair damage pipeline. Composite wrap repair consist of Fibre Reinforced Polymer (FRP) composite wrap and putty as infill material to restore the strength of a damaged steel pipe. Recently, there is tendency in reducing the usage of composite wrapping layer due to several reasons. Ultimately, it is hoped that one day the repair can be done without composite wrapping. Thus, the purpose of this research is to explore the potential of using putty alone as a repair material in repairing corroded pipeline without composite wrap via finite element analysis. Difference geometrical defects that simulating external corrosion were investigated to study the influence of defect sizes towards the burst pressure of corroded pipeline. Two infill materials which both have difference mechanical properties are used in this research to investigate their influence towards the performance of the repaired pipes. Finite element analysis has been conducted to determine the behaviour of the defected pipeline with a patch of the infill covered the defected area. The analysis was conducted for three defect sizes: 100mm x 100mm, 75mm x 150mm, and 25mm x 150mm for both putties. It was found that the narrow defect of the pipeline causing the pipe to burst at lower pressure as compared to defect that have the same dimension area for both of the infill material. This may due to high stress concentration at small area of the defect. Furthermore, it was also revealed that infill with higher ultimate tensile strength able to withstand higher pressure. The finding of the research shows that by using appropriate infill, there are potential to increase the burst pressure by about 5%. The findings of this research can serve as stepping stone to study the feasibility of repairing damaged pipeline using putty alone.References
Alexander, C. (2014). The Role of Composite Repair Technology in Rehabilitating Piping and
Pipelines. Proceedings of the ASME 2014 Pressure Vessels & Piping Conference (PVP
. 20-24 July 2014. Anaheim, California, USA. Paper No.: PVP2014-28257.
Ariff, T.F., Azmi, M.A., and Bahar, R. (2014). Economic Analysis of Using E-Glass Composite
Wrap Repair System for Pipelines. Australian Journal of Basic and Applied Sciences. 8(15),
–245.
Azraai, S.N.A., Lim, K.S., Yahaya, N., and Noor, N.M. (2015). Infill Materials of Epoxy Grout
For Pipeline Rehabilitation and Repair. Malaysian Journal of Civil Engineering. 27(1), 162-
Chan, P.H., Tshai, K.Y., Johnson, M., Choo, H.L., Li, S., and Zakaria, K. (2015). Burst Strength
of Carbon Fibre Reinforced Polyethylene Strip Pipeline Repair System – A Numerical and
Experimental Approach. Journal of Composite Materials, 49(6), 749-756.
Duell, J.M., Wilson, J.M., and Kessler, M.R. (2008). Analysis of a Carbon Composite Overwrap
Pipeline Repair System. International Journal of Pressure Vessels and Piping. 85, 782-788.
Ling, X., Ni, H.F., and Ma, G. (2008). Investigation of the Influence of Shot Peening on Stress
Corrosion Cracking of Stainless Steel Welded Joints. Materials Science Forum. 575-578,
-677. doi:10.4028/www.scientific.net/MSF.575-578.672
Koch, G.H., Brongers, M.P., Tompson, N.G., Virmani, Y.P., and Payer, J.H. (2001). Corrosion
Cost and Preventative Strategies in the United States. Federal Highway Administration,
Office of Infrastructure Research and Development. pp. 260-311.
Ma, W.F., Luo, J.H., and Cai, K. (2011). Discussion about Application of Composite Repair
Technique in Pipeline Engineering. Advanced Materials Research. 311-313, 185-188.
Norhazilan, N.M.; Yahaya, N. & Othman, S.R. (2008). The effect of extreme corrosion defect on
pipeline remaining life-time. Malaysian Journal of Civil Engineering. 20(1), 47-57.
Osella, A., Favetto, A., and López, E. (1998). Currents Induced By Geomagnetic Storms on
Buried Pipelines as a Cause of Corrosion. Journal of Applied Geophysics, 38(3), 219-233.
doi:10.1016/S0926-9851(97)00019-0
Saeed, N., Ronagh, H., and Virk, A. (2014). Composite Repair of Pipelines, Considering the
Effect of Live Pressure - Analytical and Numerical Models With Respect to ISO/TS 24817
and ASME PCC-2. Composites: Part B, 58, 605-610.
Shamsuddoha, M., Islam, M.M., Aravinthan, T., Manalo, A., and Djukic, P. (2016). Effect of
Hygrothermal Conditioning on the Mechanical and Thermal Properties of Epoxy Grouts for
Pipeline Rehabilitation. AIMS Materials Sciences, 3(3), 823-850.
Shouman, A., and Taheri, F. (2011). Compressive Strain Limits of Composite Repaired Pipelines
Under Combined Loading States. Composite Structures. 93, 1538-1548.
Tahir, S.N.F.M.M., Yahaya, N., Noor, N.M., Lim, K.S., and Rahman, A.A. (2015). Underground
Corrosion Model of Steel Pipelines Using In Situ Parameters of Soil. Journal of Pressure
Vessel Technology, 137(5), 051701.
Trifonov, O.V., and Cherniy, V.P. (2014). Analysis of Stress-Strain State in a Steel Pipe
Strengthened With a Composite Wrap. Journal of Pressure Vessel Technology, 136,
(October), 051202. doi:10.1115/1.4027229
Yahaya, N.; Norhazilan N.M.; Din M.M. & Nor S.H.M. (2009). Prediction of CO2 corrosion
growth in submarine pipelines. Malaysian Journal of Civil Engineering. 21(1), 69-81.
