Plastic Sheet Material: an Excellent Protection of PVC Pipes Against UV-Degradation

5 minute posters # 2014 Chicago

More than 75,000 km of PVC pipes are currently in use for the distribution of natural gas in The Netherlands, which make up over 60% of the distribution grid. To gain insight in the factors that influence the quality of those pipes a so called Exit Assessment programme was started in 2004. Part of this programme investigates how the handling of these pipes is influencing their quality. It is shown that PVC pipes wrapped in plastic sheet material are efficiently protected against UV-degradation. 

In this research PVC (PVC-U, PVC-A and PVC-CPE) pipes have been exposed to direct sunlight with periods varying from 1 month to a year. Half of these pipes were wrapped in standard packaging sheets. Using a further improved test method [1] the ductility of these pipes was measured. Field failure studies have shown that the lack of ductile behaviour is the most important reason for incidents involving PVC gas pipes. With the further improved test method the ductility of the PVC pipes was determined at temperatures ranging from -25°C to +50°C. With this method it is possible to determine small changes in the ductile-brittle transition temperature of PVC. The influence of direct sunlight was shown by comparing the side of the pipe that was exposed to direct sunlight with the side that had been in the shadow. It also enabled us to measure the influence of using protective plastic sheet material.

Influence of direct sunlight on PVC without sheet material was measurable and visible after 3 months. The plastic sheet material proved to be an excellent protection against UV-degradation and preserved its function during the test period of one year. This also underlines the importance of using the plastic sheet material.

Related keywords : plastic, sheet, sun, brittle, fracture, specimens, exposure, programme, chemical, effect.
Please note that the whole article content is available on PPCA website onlySource : 2014 Chicago


Related papers

Biomimetic design concepts for the pipe architecture of tomorrow

Author(s) : Gerald Pinter, Florian Arbeiter, Johannes Wiener, Andreas Frank, Otmar Kolednik 2018 Las-Vegas

In order to further increase the fracture toughness of pipes, biomimetic layer design of the pipe wall can be used. Therein, soft polymer interlayers can act as crack-arresters in a matrix of stiffer and inherently more brittle polymers. The effectiveness of the crack arresting role of soft interlayers in a...

China plastic pipe industry - Technical progress and quality improvement

Author(s) : Wang Zhanjie 2018 Las-Vegas

As the largest production country, with numerous applications, China’s plastic pipe industry is developing steadily to meet the demand and needs. This paper analyzes the current situation and barriers, and proposes the breakthroughs to achieve a sustainable, stable and healthy development of China’s plastic pipe...

Development status and technical requirements of composite insulating plastic pipe

Author(s) : HU Fa, LI Yue, GAO Yuanjie, ZHE Dongmei, WEI Ruoqi 2018 Las-Vegas

This paper expounds the development status of composite insulating pipe in the heating and chemical fields from the aspects of materials, structure and application. Combined with the relevant standards and technical requirements, the performance advantages and the key evaluation methods such as axial shear strength,...

Effect of carbon black distribution on polyethylene pipes

Author(s) : Suleyman Deveci, Nisha Preschilla, Birkan Eryigit 2018 Las-Vegas

Pipes with inhomogeneous CB distribution showed 80% less elongation than pipes with homogenously distributed CB. Polymer domains with less or no CB (windows) showed delamination from the polymer matrix as the material elongated, finally leading to fracture much earlier than expected. In this study, we investigated the...

Effect of eccentricity on the measurement of hydrostatic pressure resistance of plastic pipes

Author(s) : Suleyman Deveci, Birkan Eryigit, Senthil K. Kaliappan 2018 Las-Vegas

The effect of eccentricity on the failure time of pipes under hydrostatic pressure test has a significant magnitude that it can easily mislead the evaluation of pipes according to requirement of ISO 4427-2. Therefore, authors propose a maximum relative eccentricity limit of 0.015, even lower, for pipes being tested...

Evaluation and comparison of standard and accelerated slow crack growth determination methodologies: effect of the comonomer type influence

Author(s) : Carlos Domínguez, Álvaro Pérez, Nuria Robledo, Cristina González, Beatriz Paredes, Rafael A. García-Muñoz 2018 Las-Vegas

Last methodologies for fast evaluation of the SCG resistance on polyethylene pipe materials are analyzed in this work and compared with traditional PENT and FNCT tests. Strain Hardening (SH), Crack Round Bar (CRB) and Accelerated Creep Test (ACT) will be good alternatives for evaluating PE100RC resins. Moreover, SH...

Innovative millimeter waves technology for measuring diameter, ovality, wall thickness, and sagging of large plastic pipes

Author(s) : Christian Schalich 2018 Las-Vegas

This paper introduces a new technology based on millimeter waves. It provides a noncontact, non-destructive, online measurement of inner and outer diameter, ovality, wall thicknesses, and sagging (sagging of the melt during solidification at a too high viscosity) of large plastic pipes during the extrusion...

Investigation of the creep failure behavior of polyamide pipes

Author(s) : Hiroto Taguchi, Kaori Numata 2018 Las-Vegas

We elucidated the creep failure behavior of polyamide pipes. We conducted the hydrostatic test and Notched Pipe Test (NPT) at 80 and 90 °C for up to 10000 h for PA pipes whose creep failure behavior has not been fully elucidated yet. In the tests, the change in the failure mode from ductile failure to brittle...

Large diameter spiral wound pressure pipes

Author(s) : Bülent Kuzkaya 2018 Las-Vegas

Spiral wound pipes are becoming more and more important in larger diameter HDPE pipe production technology. The spiral wound structured wall pipes with profiles are already well known and used for several low or non-pressure pipe applications. This paper shows that spiral wound pressure pipes can fulfill the...

Molecularly oriented awwa C909 pipe for seismic applications

Author(s) : Richard St-Aubin, Dr. Thomas O’Rourke, Dr. Brad Wham, Blake Berger 2018 Las-Vegas

Molecularly oriented polyvinyl chloride (PVC-O) pipe has been found to withstand large ground deformation during seismic events without damage. The properties of PVC-O pipe that support this performance have been investigated in a multi-year testing program undertaken at the Geotechnical Lifelines Large Scale Testing...

Study on the resistance to external pressure test methods of plastic inspection chambers

Author(s) : Zhang Wei, Wei Ruoqi, Zhou Minghong, Zhou Mingwei, 2018 Las-Vegas

This article gives a brief introduction of plastic inspection chambers in China. It focuses on the formulation of China's national standard for plastic inspection chambers and conducts the theoretical analysis and data validation of the key technical metrics in the standard for the following three tests: the...

With PE-RT (polyethylene of raised temperature resistance) new applications in demanding oil & gas applications can be realized

Author(s) : Alex Stolarz 2018 Las-Vegas

THE PE-RT TECHNOLOGY HAS EVOLVED SINCE IT HAS BEEN FIRST INVENTED AND INTRODUCED TO THE MARKET IN 1982. AN ESTABLISHED TECHNOLOGY FOR HOT AND COLD WATER PIPES USED IN DOMESTIC APPLICATIONS HAS POSITIONED ITSELF WELL WITHIN OTHER MATERIALS DUE TO THE COST EFFICIENT PROCESSING, HANDLING AND PRODUCTION OF PIPES. RECENT...

Advancing of Plastic Corrugated Pipe Systems in India in Last Two Decades

Author(s) : C.B. Dandekar 2016 Berlin

Plastic Corrugated Piping System (PCPS) was introduced in India in 2001, much later than the western world started using it for various applications. It received a mixed response from the Govt. Agencies, but was well accepted by the market, actual users and standardizing institutions. PCPS finds applications in...

Comparative Life Cycle Assessment of a PVC-U rain gutter system versus a system made from galvanized steel

Author(s) : Carolin Spirinckx, Peter Sejersen, Zoran Davidovski, Karolien Peeters 2016 Berlin

For the European Plastic Pipes and Fittings Association (TEPPFA) it is important to have an insight into the environmental aspects during the life-span of plastic pipe systems all the way from the cradle to the grave. The result of the studies allows TEPPFA and its member companies to distinct (for the pipe systems...

Locatable pipe technology through global collaboration

Author(s) : Allison Crabtree, Yogesh Kumar, Jessie Allen 2016 Berlin

This paper presents a technology for locating plastic pipe buried underground. The technology was developed for the water market in India and, through intra-company collaboration, has been introduced to the water and gas markets in the United States. Information regarding product technology and end-use considerations...

Main drivers and barriers for plastic pipes in Europe

Author(s) : Davidovski Zoran, 2016 Berlin

The European Plastics Pipes and Fittings Association (TEPPFA) and it Application Group Civils working group initiated a new project at the beginning of 2015, to find a way of improving the communication and promotion of TEPPFA and its projects to the industry. This project was divided into the two phases with the...

Polypropylene multi-layer-pipes - 100 year lifetime assessment using linear elastic fracture mechanics

Author(s) : Univ.-Prof. DI Dr. mont. Gerald PINTER, DI Florian ARBEITER 2016 Berlin

Applying scientifically well established and investigated linear fracture mechanic methods (LEFM) the kinetics of the slow crack growth (SCG) on polypropylene layers and coextruded interfaces on multi-layer-pipes could be investigated. Taking effects of ageing and stress relaxation during the service lifetime into...

Quality control testing of joints in gravity flow plastic pipes

Author(s) : David Becerril García, Jacinto Cortés-Pérez, Ian D. Moore 2016 Berlin

Joint performance of joints in gravity flow buried pipelines is very important since joint failure could produce structural or service limits to the system. Standards have been developed to evaluate that joints have the necessary structural and leakage capacities which specify test methods that are not clear and do...

Reducing operational risk in vintage plastic distribution systems

Author(s) : Ernest Lever, Yongming Liu, Yiming Deng 2016 Berlin

This collaborative program will provide an integrated set of quantitative tools that will provide a structured approach to reducing operational risk in vintage plastic distribution systems susceptible to Slow Crack Growth failures. A novel endoscopic structured light scanning tool will be developed and prototyped for...

Sodium hypochlorite dosing for zebra mussel abatement using double contained advanced PE

Author(s) : Kim Endsley, Joseph Poniatowski 2016 Berlin

In order to free itself from the rising costs of water supplied by the Detroit Water and Sewerage Department, the Karegnondi Water Authority proposed a new water intake and delivery system from Lake Huron to Flint, Michigan. Because of the recent introduction of the zebra mussel into North America’s Great Lakes, a...

Members of the Association

BOREALISBOROUGEFormosa Plastics CorporationINEOS O&PIRPCKazanorgsintez PJSCKorea Petrochemical IND. Co., LTD (KPIC)LyondellBasellPetroChina Dushanzi Petrochemical CompanyPRIME POLYMERSABICSCG Chemicals & Thai PolyethyleneSinopecTASNEE
TOP