Performace Comparison of High Desity Polyethylene Pipe (HDPE) in Municipal Water Applications PDF Download
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Author: Chandan Venkatesh
Publisher:
ISBN:
Category :
Languages : en
Pages : 99
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Book Description
The current and forecasted major challenge faced by water utilities is delivering potable water efficiently with minimum loss to end users. Water pipe failure has negative impact not only local communities but also on the nation's economy. The American Water Works Association (AWWA) has estimated that it will cost over $250 billion to replace and renew the nation's water pipes over the next 20 years. According to the 2009 American Society of Civil Engineers (ASCE) Report Card, seven billion gallons of water are lost in this country every day! Every pipe has unique properties with advantages and limitations. During a pipe's life cycle, failures occur due to numerous factors such as age, loading conditions, environmental conditions, installation quality, manufacturing procedures, operation and maintenance strategies and so on. The very limited information on High Density Polyethylene (HDPE) pipes created the need for this research. This thesis is a preliminary step towards understanding the HDPE pipe performance for lower and larger pipe size diameters. To achieve the objectives of this research, a nationwide survey was carried out. For the respondent utilities, the average annual failure rate for the smaller diameter pipe is 0.5 per 100 miles. Most frequent causes of failures occurring in small diameter pipes were due to joint failure. Due to lack of enough large diameter HDPE pipe respondents, the results were not conclusive.
Author: Chandan Venkatesh
Publisher:
ISBN:
Category :
Languages : en
Pages : 99
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Book Description
The current and forecasted major challenge faced by water utilities is delivering potable water efficiently with minimum loss to end users. Water pipe failure has negative impact not only local communities but also on the nation's economy. The American Water Works Association (AWWA) has estimated that it will cost over $250 billion to replace and renew the nation's water pipes over the next 20 years. According to the 2009 American Society of Civil Engineers (ASCE) Report Card, seven billion gallons of water are lost in this country every day! Every pipe has unique properties with advantages and limitations. During a pipe's life cycle, failures occur due to numerous factors such as age, loading conditions, environmental conditions, installation quality, manufacturing procedures, operation and maintenance strategies and so on. The very limited information on High Density Polyethylene (HDPE) pipes created the need for this research. This thesis is a preliminary step towards understanding the HDPE pipe performance for lower and larger pipe size diameters. To achieve the objectives of this research, a nationwide survey was carried out. For the respondent utilities, the average annual failure rate for the smaller diameter pipe is 0.5 per 100 miles. Most frequent causes of failures occurring in small diameter pipes were due to joint failure. Due to lack of enough large diameter HDPE pipe respondents, the results were not conclusive.
Author:
Publisher:
ISBN:
Category : Culverts
Languages : en
Pages : 198
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Book Description
In the past, culvert pipes were made only of corrugated metal or reinforced concrete. In recent years, several manufacturers have made pipe of lightweight plastic - for example, high density polyethylene (HDPE) - which is considered to be viscoelastic in its structural behavior. It appears that there are several highway applications in which HDPE pipe would be an economically favorable alternative. However, the newness of plastic pipe requires the evaluation of its performance, integrity, and durability; A review of the Iowa Department of Transportation Standard Specifications for Highway and Bridge Construction reveals limited information on the use of plastic pipe for state projects. The objective of this study was to review and evaluate the use of HDPE pipe in roadway applications. Structural performance, soil-structure interaction, and the sensitivity of the pipe to installation was investigated. Comprehensive computerized literature searches were undertaken to define the state of-the-art in the design and use of HDPE pipe in highway applications. A questionnaire was developed and sent to all Iowa county engineers to learn of their use of HDPE pipe. Responses indicated that the majority of county engineers were aware of the product but were not confident in its ability to perform as well as conventional materials. Counties currently using HDPE pipe in general only use it in driveway crossings. Originally, we intended to survey states as to their usage of HDPE pipe. However, a few weeks after initiation of the project, it was learned that the Tennessee DOT was in the process of making a similar survey of state DOT's. Results of the Tennessee survey of states have been obtained and included in this report. In an effort to develop more confidence in the pipe's performance parameters, this research included laboratory tests to determine the ring and flexural stiffness of HDPE pipe provided by various manufacturers. Parallel plate tests verified all specimens were in compliance with ASTM specifications. Flexural testing revealed that pipe profile had a significant effect on the longitudinal stiffness and that strength could not be accurately predicted on the basis of diameter alone. Realizing that the soil around a buried HDPE pipe contributes to the pipe stiffness, the research team completed a limited series of tests on buried 3 ft-diameter HDPE pipe. The tests simulated the effects of truck wheel loads above the pipe and were conducted with two feet of cover. These tests indicated that the type and quality of backfill significantly influences the performance of HDPE pipe. The tests revealed that the soil envelope does significantly affect the performance of HDPE pipe in situ, and after a certain point, no additional strength is realized by increasing the quality of the backfill.
Author:
Publisher: Plastics Pipe Institute
ISBN: 9781952632006
Category :
Languages : en
Pages : 620
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Book Description
Published by the Plastics Pipe Institute (PPI), the Handbook describes how polyethylene piping systems continue to provide utilities with a cost-effective solution to rehabilitate the underground infrastructure. The book will assist in designing and installing PE piping systems that can protect utilities and other end users from corrosion, earthquake damage and water loss due to leaky and corroded pipes and joints.
Author: Divyashree
Publisher:
ISBN:
Category :
Languages : en
Pages : 113
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Book Description
The drinking water infrastructure in the North America requires a durable and reliable water transmission pipe material. Thus, it is important to study pipe performance, so that water utilities can benefit from cost-effective and efficient pipe installations and longer design life. All pipe materials deteriorate overtime and every pipe has unique properties with advantages and limitations. During a pipe's life cycle, failures occur due to numerous factors such as age, loading conditions, environmental conditions, installation quality, manufacturing procedures, operation and maintenance strategies and so on. This research focuses on reliability and durability of large diameter (16 in. and larger) high density polyethylene (HDPE) pipe and specifically its fatigue performance under cyclic loading, since limited information is available on resistance of this pipe under transient pressures. To conduct this research, in addition to a comprehensive literature search, a national survey of water utilities in the North America was performed. Additionally a testing concept was developed to determine the performance of a HDPE pipe sample with recurring surges for two million cycles. This specimen was subjected to a pressure of 1.5 times Pressure Class (PC) for a 16-in., 15-ft long, DR 17, 4710 HDPE pipe with a fused joint in the middle. The results of this investigation showed that at this time, few water utilities use large diameter HDPE pipe. Those that use large diameter HDPE, majority are satisfied with the pipe performance; however, they had some concerns regarding joints and fittings as described in this thesis. Also, some utilities did not differentiate between 4710 HDPE pipe tested in this research, and older products such as 3408 and 3608. The results of testing showed that the pipe sample described above was able to withstand the 2 M cyclic loadings between 125 psi and 188 psi (1.5 times its pressure class).
Author: Sarah L. Gassman
Publisher:
ISBN:
Category : Drainage pipes
Languages : en
Pages : 262
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Book Description
Author: Bashar K. Al-Tarawneh
Publisher:
ISBN:
Category : Pipe, Plastic
Languages : en
Pages : 0
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Book Description
Author: Michael Pluimer
Publisher:
ISBN: 9780309446778
Category : Drainage pipes
Languages : en
Pages : 82
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Book Description
TRB's National Cooperative Highway Research Program (NCHRP) Research Report 870: Field Performance of Corrugated Pipe Manufactured with Recycled Polyethylene Content explores the use of corrugated high density polyethylene (HDPE) pipe manufactured with recycled content and proposes guidelines for manufacturing these pipes to ensure they meet the service life requirements for the given application. This project expounded on the research published in NCHRP Report 696. The research consisted of manufacturing several large diameter corrugated HDPE pipes out of various blends of virgin and post-consumer recycled (PCR) materials commonly used in land drainage applications and evaluating these pipes in the field and laboratory to determine their service life in typical installed conditions. PCR materials were the focus of this project as they are more readily available and typically used in the corrugated HDPE pipe industry than post industrial recycled materials. However, the research is applicable to both types. -- cc. http://www.trb.org/main/blurbs/176741.aspx.
Author: American Water Works Association
Publisher: American Water Works Association
ISBN: 1583215492
Category : Science
Languages : en
Pages : 286
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Book Description
This comprehensive manual of water supply practices explains the design, selection, specification, installation, transportation, and pressure testing of concrete pressure pipes in potable water service.
Author: Kam Weng Ng
Publisher:
ISBN:
Category :
Languages : en
Pages : 280
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Book Description
The findings from the field tests in Phase I and this phase will provide data for improvement of Iowa DOT specifications for HDPE pipe and its backfill condition. Field studies of Phase I conducted on 36-in. (915-mm) diameter HDPE pipes from Manufacturer C with four backfills were used for an assessment of the influence of the soil envelope on pipes' performance in this thesis. Furthermore, full scale field tests were conducted in this phase on 36-in. (915-mm) pipe from Manufacturer A with four additional backfill materials. The testing program used in this phase is similar to Phase I.
Author: Mehdi Farshad
Publisher: Elsevier
ISBN: 0080463932
Category : Technology & Engineering
Languages : en
Pages : 218
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Book Description
Industrial and domestic piping is increasingly made from various plastics and composites, and these materials withstand heavy use over long periods. They are, however, affected by environmental and other factors over time and can degrade, causing major problems within piping systems. Farshad's book deals with why plastic pipes and systems fail, and with how to investigate and diagnose such failures. Pipes may buckle, fracture, change in dimensions and colour, blister and delaminate, corrode through stress, be abraded and obstructed: all these cause problems and lead to loss of efficient operation of a system. The author's experience is backed up by a large data-base of results Wide target audience Only book covering the entire subject Unique approach based on long experience
