Our site uses cookies necessary for its proper functioning. To improve your experience, other cookies may be used: you can choose to disable them. This can be changed at any time via the Cookies link at the bottom of the page.


Gas permeation in multi-layered composite pipe for high pressure pipelines

 

Papers

Plastic Pipes Conference Association # 2010 Vancouver

Mel Kanninen, Kyle Bethel and Aron Ekelund

It is well known that gas permeation in thermoplastic pipe is proportional to pressure. Accordingly, quantitative consideration must be given to this phenomenon to properly design and operate reinforced thermoplastic composite pipe (RTCP) in high pressure applications. In this paper a permeation predictive model based on classical diffusion theory has been developed for multilayer RTCP carrying greenhouse gases. The methodology uniquely includes the potential for both an internal pressure build-up that has the potential to burst the outer layer of the composite, and for the back pressure from permeation build-up in the annulus between the inner surface of a rigid steel host pipe and the outer surface of the composite pipe to collapse the inner layer. The focus of this paper is on the prototypical RTCP known as the Smart PipeĀ® although other types of RTCP are also analyzed along with conventional low pressure plastic pipe. The analysis work presented herein is a first step towards a complete and validated approach for coping with gas permeation. While not yet supported by experimentation, this work shows that all types of RTCP must be vented during high pressure service, albeit for different reasons, and there is a sound basis for determining the rate and mode of permeation that must be vented.

Please note that the whole article content is available on PPCA website only :

Related papers

1995 Edinburgh : A Methodology for the Prevention of Rapid Check Propagation in PE Gas Pipelines

Author(s) : Grigory, Kim, Kanninen, O'Donoghue, Mamo

The perceived need to ensure that polyethylene gas distribution pipes are safe from the possibility of long running catastrophic cracks has prompted a significant level of research recently. This paper brings to a completion an ongoing effort by the authors and their colleagues over the last few years. The...

1992 Eindhoven : A Theoretical and Experimental Evaluation

Author(s) : Kanninen, Buczala, Kuhlman, Green, Grigory, O'Donoghue, McCarth

Most current procedures for the design, installation and qualification of electrofused jointsin polyethylene gas piping systems are empirical in nature. To improve this situation, the Gas Research Institute initiated an integrated experimental and analysis research program at the Southwest Research Institute. The...

1992 Eindhoven : Forecasting the Long-Time Service Performance of PE Gas Distribution Pipes

Author(s) : Kuhlmann, Kanninen, Tweedy

Accelerated slow crack growth testing procedures that are coupled with newly developed bi-directional time-temperature shifting functions can provide reliable fracture mechanics based forecasts of long-term service performance of polyethylene gas distribution pipes. This methodology is first reviewed, then used in...

1992 Eindhoven : Procedures to Prevent Rapid Crack Propagation in PE Gas Pipes

Author(s) : Kanninen, Leung, O'Donoghue

This paper outlines a theoretical approach developed to quantify the conditions for a long-running crack in PE gas distribution pipes. Comparisons with a full-scale experiment on a 250 mm diameter SDR 17.6 MDPE pipe are made to demonstrate the validity of the model. The present status of a user-oriented procedure to...

Members of the Association

BOREALISBOROUGEFormosa Plastics CorporationHanwha TotalEnergiesINEOS O&PIRPCKorea Petrochemical IND. Co., LTD (KPIC)LyondellBasellORLEN UnipetrolPetroChina Dushanzi Petrochemical CompanyPRIME POLYMERSABICSCG Chemicals & Thai PolyethyleneSinopecTASNEE