0
Research Papers: Materials and Fabrication

A Lifetime Prediction Method of Pressured Gas Polyethylene Pipes by Thermal-Oxidative Aging Test and Tensile Test

[+] Author and Article Information
Yang Wang

Laboratory of Vehicle Advanced Manufacturing,
Measuring and Control Technology
(Ministry of Education),
Beijing Jiaotong University,
Beijing 100044, China
e-mail: 15116363@bjtu.edu.cn

Hui-qing Lan

Laboratory of Vehicle Advanced Manufacturing,
Measuring and Control Technology
(Ministry of Education),
Beijing Jiaotong University,
Beijing 100044, China
e-mail: hqlan@bjtu.edu.cn

Tao Meng

China Special Equipment Inspection
and Research Institute,
Beijing 100013, China
e-mail: 64087997@163.com

Shan Chen

China Special Equipment Inspection
and Research Institute,
Beijing 100013, China
e-mail: 471520537@qq.com

Jian-dong Zuo

CASCO Signal, Ltd.,
Beijing 100045, China
e-mail: brianzuo123@163.com

Nan Lin

China Special Equipment Inspection
and Research Institute,
Beijing 100013, China
e-mail: sy_linnan@hotmail.com

1Corresponding author.

Contributed by the Pressure Vessel and Piping Division of ASME for publication in the JOURNAL OF PRESSURE VESSEL TECHNOLOGY. Manuscript received July 24, 2017; final manuscript received November 9, 2017; published online December 5, 2017. Assoc. Editor: Oreste S. Bursi.

J. Pressure Vessel Technol 140(1), 011404 (Dec 05, 2017) (6 pages) Paper No: PVT-17-1131; doi: 10.1115/1.4038526 History: Received July 24, 2017; Revised November 09, 2017

Polyethylene (PE) pipes have the advantages of low weight, corrosion resistance, high impact resistance, and superior flexibility, and have been widely used for various urban gas engineering. With the increase of service life, the aging of PE pipes has become a safety issue that needs to be solved. So far, the aging performance of PE pipes are researched at home and abroad, but there are few reports on the aging performance of PE pipes under different pressures which are similar to actual urban gas working condition. Therefore, an accelerated aging test of gas PE pipes under different pressures was carried out by a thermal oxygen aging experimental setups. After that, mechanical properties of the aged PE pipes were tested by a tensile test. Then, based on the tensile test's results, empirical equations of pressured urban gas PE pipes were got by Arrhenius fit of the data, and finally, a life prediction model of pressured urban gas PE pipes was proposed. The results show that tensile strength (TS) of the aged gas PE pipes reduces with the increasing internal pressure. The lives of the PE gas pipes with internal pressure of 0.1 MPa, 0.2 MPa, 0.3 MPa, and 0.4 MPa are 10%, 22.4%, 34.7%, and 44% shorter than those without internal pressure, respectively. This life prediction method is not only suitable for pressured urban gas PE pipes, but also for other plastic pipes in similar environments.

Copyright © 2018 by ASME
Your Session has timed out. Please sign back in to continue.

References

Bullions, T. A. , Mcgrath, J. E. , and Loos, A. C. , 2003, “ Thermal-Oxidative Aging Effects on the Properties of a Carbon Fiber-Reinforced Phenylethynyl-Terminated Poly(Etherimide),” Compos. Sci. Technol., 63(12), pp. 1737–1748. [CrossRef]
ISO, 2014, “Plastics Piping Systems for the Supply of Gaseous Fuels—Polyethylene (PE),” British Standards Institution, London, Standard No. ISO 4437-2:2014. https://www.iso.org/standard/59129.html
Brown, N. , 2007, “ Intrinsic Lifetime of Polyethylene Pipelines,” Polym. Eng. Sci., 47(4), pp. 477–480. [CrossRef]
Ifwarson, M. O. , 1989, “ Life-Time of Polyethylene Pipes Under Pressure and Exposure to High Temperatures,” Kunstst. Ger. Plast., 79(6), pp. 20–22.
Schulte, U., 2006, “50 Years of Continuous Testing of Pipes Made From Hostalen HDPE Grades Completed,” Basell Polyolefins Press Release, Frankfurt, Germany, accessed Dec. 6, 2006, http://lyondellbasell.mediaroom.com/index.php?s=43&item=509
Frank, A. , Pinter, G. , and Lang, R. W. , 2009, “ Prediction of the Remaining Lifetime of Polyethylene Pipes After Up to 30 Years in Use,” Polym. Test., 28(7), pp. 737–745. [CrossRef]
Ulmanu, V. , Drăghici, G. , and Aluchi, V. , 2012, “Lifetime Estimation of High Density Polyethylene Pipelines Based on Fracture Mechanics Principles,” Petroleum–Gas University of Ploiesti Bulletin, Technical Series, 64(4), pp. 39–44.
Tonkovic, Z. , Somolanji, M. , and Stojšić, J. , 2009, “ Life Prediction of Damaged PE 80 Gas Pipes,” Teh. Vjesn., 16(3), pp. 33–37. https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&cad=rja&uact=8&ved=0ahUKEwjlkI_E9uPXAhVBLyYKHb9qCUcQFggmMAA&url=https%3A%2F%2Fhrcak.srce.hr%2Ffile%2F64195&usg=AOvVaw2vfesfptgPO-xs7RrjvB-B
Colin, X. , Audouin, L. , and Verdu, J. , 2009, “ Towards a Non Empirical Kinetic Model for the Lifetime Prediction of Polyethylene Pipes Transporting Drinking Water,” Macromol. Symp., 286(1), pp. 81–88. [CrossRef]
Zheng, J. , Shi, J. , and Guo, W. , 2012, “ Development of Nondestructive Test and Safety Assessment of Electrofusion Joints for Connecting Polyethylene Pipes,” ASME J. Pressure Vessel Technol., 134(2), p. 021406. [CrossRef]
Raos, P. , Tonković, Z. , and Sercer, M. , 2011, “ Analysis and Prediction of Remaining Life Time of Damaged Polyethylene Gas Pipes,” Kautsch. Gummi Kunstst., 64(6), pp. 33–39. http://repozitorij.fsb.hr/id/eprint/6810
Westra, L. , Breaux, M. W. , Richard, R. , and Wilson, C. D. , 2014, “Hydrostatic Pressure Testing System and Method,” Greene's Energy Group, LLC, Houston, TX, U.S. Patent No. US8731849 B2. https://www.google.com/patents/US8731849
Hoàng, E. M. , and Lowe, D. , 2008, “ Lifetime Prediction of a Blue PE100 Water Pipe,” Polym. Degrad. Stab., 93(8), pp. 1496–1503. [CrossRef]
Lan, H. , Sha, D. , and Zuo, J. , 2015, “The Method of Life Prediction for Polyethylene Gas Pipeline in Use By Using Accelerating Thermal Aging Test, Unit: China, 20140548625.1.”
Lan, H. , Sha, D. , Meng, T. , Fang, X. , Zuo, J. , and Li, X. , 2016, “ Thermal Oxidative Aging Laws of PE Gas Pressure Pipes,” Nat. Gas Ind., 36(4), pp. 78–83.
ISO, 2014, “Rubber, Vulcanized or Thermoplastic—Estimation of Life-Time and Maximum Temperature of Use,” British Standards Institution, London, Standard No. ISO 11346:2014. https://www.iso.org/standard/63438.html
Langlois, V. , Audoin, L. , Verdu, J. , and Courtois, P. , 1993, “ Thermo-Oxidative Aging of Cross-Linked Linear Polyethylene: Stabilizer Consumption and Lifetime Prediction,” Polym. Degrad. Stab., 40(3), pp. 399–409. [CrossRef]
Vogt, H. , Enderle, H.-F. , Schulte, U. , and Hessel, J. , 2009, “ Thermal Ageing of PE 100 Pipes for Accelerated Lifetime Prediction Under Service Conditions,” International Plastic Pipe Exchange Conference, Beijing, China, Nov. 3–5, pp. 33–41. http://www.hessel-ingtech.de/pdf/budapest_2008_vogt.pdf
Peacock, A. J. , and Calhoun, A. , 2006, Polymer Degradation and Stability, Carl Hanser Verlag GmbH & Co. KG, Munich, Germany, pp. 171–181.
Anna, P. , Bertalan, G. , Marosi, G. , Ravadits, I. , and Maatoug, M. A. , 2001, “ Effect of Interface Modification on the Photo-Stability of Pimenented Polyethylene Films,” Polym. Degrad. Stab., 73(3), pp. 463–466. [CrossRef]
Adams, T. M. , Hall, S. , Scavuzzo, R. J. , Munson, D. , Andrasik, J. W. , and Findlan, S. , 2008, “Tensile Testing and Material Property Development of High Density Polyethylene Pipe Materials,” ASME Paper No. PVP2008-61906.
ISO/TR, 2005, “Rubber and Rubber Products—Determination of Precision for Test Method Standards,” Swedish Standards Institute, Stockholm, Sweden, Standard No. ISO/TR 9272:2005. https://www.iso.org/standard/36984.html
Celina, M. , Gillen, K. T. , and Assink, R. A. , 2005, “ Accelerated Aging and Lifetime Prediction: Review of Non-Arrhenius Behaviours Due to Two Competing Processes,” Polym. Degrad. Stab., 90(3), pp. 395–404. [CrossRef]
Sato, K. , and Sprengel, W. , 2012, “ Element-Specific Study of Local Segmental Dynamics of Polyethylene Terephthalate upon Physical Aging,” J. Chem. Phys., 137(10), p. 104906. [CrossRef] [PubMed]

Figures

Grahic Jump Location
Fig. 1

Thermal oxidative aging experimental setups of pressured PE pipes: 1—air pump, 2—valve, 3—pressure gage, 4—valve, 5—relief valve, 6—pressure gage, 7—gasket ring, 8—sealing clamp, 9—PE pipe, and 10—aging oven

Grahic Jump Location
Fig. 2

Pictures of actual experimental setups of the thermal oxidative aging test of pressured PE pipes: (a) overall picture of experimental setups and (b) PE pipe in the thermal oxidative aging test

Grahic Jump Location
Fig. 3

Schematic diagram of the experimental procedure and setup for sample preparation and characterization (standard test pieces (dumb-bells) were stretched in a tensile-testing machine at a constant rate of traverse of the driven grip or pulley. Readings of force and elongation were taken as required during the uninterrupted stretching of the test piece and when it broke).

Grahic Jump Location
Fig. 4

Relationship between TS and pressure. TS data under different times of 72 h (a), 156 h (b), 356 h (c), 456 h (d), and 504 h (e), different temperatures of 353 K (), 363 K (), 373 K (), and 383 K (▪).

Grahic Jump Location
Fig. 5

Logarithmic plot of TS data of PE pipes at all test temperatures at 0 MPa. Linear regression equations and regression coefficients were obtained: 353 K () (y = 6.6929030 –0.000001321x; R2 = 0.9930), 363 K  ()   (y = 6.6754841 –0.000001261x; R2 = 0.9929), 373 K  ()   (y = 6.6703419– 0.000001264x; R2 = 0.9917), and 383 K  (▪) (y = 6.6513336– 0.000001453x; R2 = 0.9912).

Grahic Jump Location
Fig. 6

Logarithmic plot of TS data of PE pipes at all test temperatures at 0.1 MPa. Linear regression equations and regression coefficients were obtained: 353 K () (y = 6.5988653–0.000001832x; R2 = 0.9983), 363 K () (y = 6.5953172 –0.000001838x; R2 = 0.9943), 373 K () (y = 6.5717514– 0.0000001943x; R2 = 0.9957), and 383 K (▪) (y = 6.5565885– 0.000001988x; R2 = 0.9972).

Grahic Jump Location
Fig. 7

Logarithmic plot of TS data of PE pipes at all test temperatures at 0.2 MPa. Linear regression equations andregression coefficients were obtained: 353 K  () (y = 6.5408522–0.000002034x; R2 = 0.9951), 363 K  () (y = 6.5252276–0.000002157x; R2 = 0.9953), 373 K  () (y = 6.5145320–0.000002123x; R2 = 0.9971), and 383 K  (▪) (y = 6.5015178 –0.000002236x; R2 = 0.9968).

Grahic Jump Location
Fig. 8

Logarithmic plot of TS data of PE pipes at all test temperatures at 0.3 MPa. Linear regression equations andregression coefficients were obtained: 353 K  () (y = 6.4777746–0.000002411x; R2 = 0.9959), 363 K  () (y = 6.4690048–0.000002361x; R2 = 0.9944), 373 K  () (y = 6.4478975–0.000002445x; R2 = 0.9941), and 383 K  (▪) (y = 6.4289241 –0.000002597x; R2 = 0.9945).

Grahic Jump Location
Fig. 9

Logarithmic plot of TS data of PE pipes at all test temperatures at 0.4 MPa. Linear regression equations and regression coefficients were obtained: 353 K () (y = 6.4172341 –0.000002636x; R2 = 0.9968), 363 K () (y = 6.4004890 –0.000002646x; R2 = 0.9971), 373 K () (y = 6.3794248 –0.000002789x; R2 = 0.9931), and 383 K (▪) (y = 6.3625406 –0.000002934x; R2 = 0.9916).

Grahic Jump Location
Fig. 10

Arrhenius plot for TS data of PE pipes under different pressures: 0 MPa (▪), 0.1 MPa (), 0.2 MPa (), 0.3 MPa (), and 0.4 MPa (). Linear regression equations and regression coefficients were obtained: 0 MPa (y1 = 1323.2271 –481,521.2470x1; R2 = 0.7941), 0.1 MPa (y1 = 509.8451–182,606.2399x1; R2 = 0.8893), 0.2 MPa (y1 = 471.1972–168,440.1871x1; R2 = 0.7769), 0.3 MPa (y1 = 515.7409–184,867.6834x1; R2 = 0.6424), and 0.4 MPa (y1 = 722.9258–279,466.3970x1; R2 = 0.8994).

Grahic Jump Location
Fig. 11

Life prediction curve of gas PE pipes under pressures by trinomial fitting

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In