Best environmental practice PVC pipes and fittings for the green building industry

Author(s) : Vivek Rohatg, Gregor Hiesgen, Mark J. Lamborn, Ashish M. Sukhadia, Douglas E. Simpson, David W. Borrego, Pamela L. Maeger

Maintaining dimensions within specifications is problematic for the extrusion of large diameter thick-wall polyethylene (PE) pipe (> 75 mm wall) due to sag caused by insufficient resin melt strength. However, sag can be controlled through careful resin selection and optimization of the pipe cooling process. This paper...

Author(s) : Jim Goddard, Issam Khoury, Mark Heinlein

The Atlanta Braves Major League Baseball team built a new stadium north of Atlanta, Georgia. The field drainage design required the removal of 75mm (3 inches) of rainfall an hour and a system for warming or cooling the field using air blown through the drainage system and field profile using heat from pipe buried...

Author(s) : Dongyu Fang, Mark Yu, Zhang Qingfu

In the present paper we introduced how high modulus polypropylene helps an innovative design of utility tunnel up to 4000mm in diameter. High modulus polypropylene shows high modulus but still maintain reasonable flexibility so that tunnel and surrounding soil could form an integrated system, which means no force is...

Author(s) : Mark Yu, Dongyu Fang, Peck Tze Kang, Amos Tay , Fan Liu

Large diameter pipe was introduced in refineries and petrochemical plant, desalination plant and power plant for water intake and sea out fall in the past decade. PE100-RC material was selectedfor its excellent balance of superior bi-modal stress crack resistance and consistent high stiffness modulus. Under the...

Author(s) : Jie Feng, Michael Petr, Jeff Wenzel, Mark Mirgon, Sam Crabtree, Alan Nakatani

Through tensile tests, simulated orientation, tribology, and finite element analysis, this study explored the effect of temperature, lubrication and applied hydraulic pressure in the PVC orientation process. It was demonstrated that tight control of these parameters is critical in a continuous PVC orientation process...

Author(s) : Nick Mark, Eric Bridgstock, David Carey

An insight into a unique approach to the management of electrofusion and butt fusion joint quality on polyethylene pipelines. The presentation will reference experience and learnings from a system that has already been used in the field to great effect (see Abstract) and a new approach to butt fusion (see enclosed...

Author(s) : Antti Tynys, Dongyu Fang, Prashant Nikhade, Mark Yu, Tomi Kangas

The need for larger diameter pipes and fittings for in-house heating, plumbing and domestic water systems is pushing the existing materials and processes to their limits. More often final products cannot be produced without penalties either in production rate or in final product quality. This paper discusses...

Author(s) : Edward Alan Ambler, John Matthews, Lawrence Pultz, Ryan Stowe

This paper summarizes the design and implementation of the largest asbestos cement pipe bursting project performed to date within the United States. The paper also presents regulatory information required to properly track and document an asbestos cement pipe bursting project while meeting the National Emissions...

Author(s) : Alan Whittle, Jim Campbell

The coal seam gas industry in Australia is currently undergoing a major expansion with over 50,000 km or 30,000 mile of PE100 pipes to be installed in diameters ranging from DN110 to DN710. The pipes are being used to carry produced water, gas and treated water. The considerable quantity of pipe to be installed in...

Author(s) : Nigel Jones

PVC is clearly widely known as a material highly suited for trenched or open-cut pipe installations for a variety of uses. Less widely discussed is the fact that PVC offers the widest range of options for trenchless installations. While open-cut installations continue to be the standard method of construction for new...

Author(s) : Ashish M. Sukhadia, Mark J. Lamborn, Pam L. Maeger

Over the past several years, we have conducted extensive investigations of the Rapid Crack Propagation (RCP) behavior of Polyethylene (PE) pipes. While the typical data of interest is the Critical Pressure (Pc) and/or Critical Temperature (Tc), we chose to take our investigations further by exploring and generating...

Author(s) : Mark J. Lamborn, Pam L. Maeger, Rick E. Kunc, Vivek Rohatgi, Paul J. DesLauriers, Ashish M. Sukhadia

Dual cooling is a post-extrusion cool down process employed for polyethylene (PE) pipe, whereby either water or ambient air is forced through the pipe bore following extrusion, in order to accelerate cooling. The primary benefits offered by the dual cooling process are increased production rates and reduced resin...

Author(s) : Heathcote Mark

Key Words : PE100, Coal Seam Gas, Water The coal seam gas projects in Australia are undergoing a massive expansion, with greatly increased gas production for both domestic and export markets. Total investment is expected to be in excess of AUD $30b. PE100 has been selected as the material of choice for the gas...

Author(s) : Alan Whittle, Nigel Jones and Mark Heathcote

PVC has been used successfully for sewer and sanitary drainage pipes in Australia for over 40 years. It is the predominant material for these applications. The reason for this success is the superior, all round performance of PVC piping systems compared to the various alternatives. Equally important has been the...

Author(s) : Camille George Rubeiz

In the U.S., 38 billion gallons of water are treated every day for domestic and public use, but 2.5 billion gallons of this treated water is lost because of leaks from corroded or damaged potable water piping system. According to the American Water Works Association, leaks in main water lines can reach up to 1,000...

Author(s) : Camille George Rubeiz

This paper summarizes the performance of water and gas piping systems during six earthquakes in the US, Japan, Thailand and Columbia. Also, the paper will present data from the UK and Sweden about the performance of pipes in non-earthquake environments. The paper will assist design engineers and owners in selecting...

Author(s) : Whittle, Pesudovs

The process of extracting scrap plastics pipes from the demolition and construction waste stream in a major city is described together with a quantification of the proportion of the most common plastics pipe materials in the waste. The condition of the pipes and the methods used to turn them into a re-usable form is...

Author(s) : Chapman, Macovaz

Material efficiency is a focal point for the thermoplastic pipe industry. With the high embodied energy content of the materials, the environmental and cost gains to be made through material savings are significant. Many techniques have been developed for the manufacture of both pressure and non-pressure pipe to...

Author(s) : Whittle, Tennakoon

Ipswich Water commenced reviewing the service lives of different pipe materials in its gravity sewer system. Unlike other pipe materials, PVC sewers did not have failure histories, or deterioration revealed in CCTV inspections, even after 25 years of service. Therefore establishing a realistic predicted life was not...

Author(s) : Whittle, Teo

PVC-U and PVC-M pipes may be used in applications where they are subjected to cyclic pressures generated by the operation of pumps and valves. It is therefore important that the pipe material’s response to cyclic loading is quantified and that pipelines are designed and operated within the material’s established...