The Behavior of Asbestos–Cement Pipe Under Various Water Quality Conditions: A Progress Report

Buelow, Ralph W.; Millette, James R.; McFarren, Earl F.; Symons, James M.

doi:10.1002/j.1551-8833.1980.tb04474.x

Cited by 16 publications

(14 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…• Fingernail scratch tests for evaluating the softening of the AC pipe interior consist simply of determining whether a pipe surface can be scratched with a fingernail (Buelow et al, 1980). Scratch tests can be used in the tentative identification of minerals in the field.…”

Section: Pipe Examination and Sample Testingmentioning

confidence: 99%

Condition Assessment Methods for AC Pipe and Current Practices

Hu¹,

Wang²,

Chowdhury³

2010

Pipelines 2010

View full text Add to dashboard Cite

The material in this document is covered by the provisions of the Copyright Act, by Canadian laws, policies, regulations and international agreements. Such provisions serve to identify the information source and, in specific instances, to prohibit reproduction of materials without written permission. For more information visit http://laws.justice.gc.ca/en/showtdm/cs/C-42Les renseignements dans ce document sont protégés par la Loi sur le droit d'auteur, par les lois, les politiques et les règlements du Canada et des accords internationaux. Ces dispositions permettent d'identifier la source de l'information et, dans certains cas, d'interdire la copie de documents sans permission écrite. Pour obtenir de plus amples renseignements : http://lois.justice.gc.ca/fr/showtdm/cs/C-42 Condition Assessment Methods for AC Pipe and Current Practices

show abstract

Section: Pipe Examination and Sample Testingmentioning

confidence: 99%

Condition Assessment Methods for AC Pipe and Current Practices

Hu¹,

Wang²,

Chowdhury³

2010

Pipelines 2010

View full text Add to dashboard Cite

show abstract

“…An EPA project to verify the results of the earlier pipe loop study was begun in 1974 (13). In 1974, a special report on this problem was published by the American Water Works Association (12).…”

Section: Control Of Asbestos From Ac Pipesmentioning

confidence: 99%

“…Iron coatings were reported by Buelow et al (13) to be protective in a water distribution system and in an experimental pipe loop, but use of iron might result in complaints from rusty or "red" water. Iron coatings were reported by Buelow et al (13) to be protective in a water distribution system and in an experimental pipe loop, but use of iron might result in complaints from rusty or "red" water.…”

Section: Control Of Asbestos From Ac Pipesmentioning

confidence: 99%

“…According to Buelow et al (13), when AC pipe under pressure is drilled and tapped, if the cuttings are not flushed out through the tapping machine, they can drop into the pipe and cause a major release of fibers. According to Buelow et al (13), when AC pipe under pressure is drilled and tapped, if the cuttings are not flushed out through the tapping machine, they can drop into the pipe and cause a major release of fibers.…”

Section: Control Of Asbestos From Ac Pipesmentioning

confidence: 99%

See 1 more Smart Citation

Engineering and Operating Approaches for Controlling Asbestos Fibers in Drinking Water

Logsdon¹

1983

Environmental Health Perspectives

View full text Add to dashboard Cite

JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. The National Institute of Environmental Health Sciences (NIEHS) and Brogan & Partners are collaborating with JSTOR to digitize, preserve and extend access to Environmental Health Perspectives.Techniques are available to minimize the concentration of asbestos fibers in drinking water. Filtration research conducted at locations on Lake Superior and in the Cascade Mountains in Washington has shown that amphibole and chrysotile fibers can be removed by granular media filtration. Removal percentages can exceed 99% when the raw water is coagulated properly and the filtered water turbidity is 0.10 ntu (nephelometric turbidity units) or lower. Filtered water fiber counts below detectable limits of 0.1 to 0.01 x 106 fibers/L can be attained. A study by the Metropolitan Water District of Southern California showed that when raw water chrysotile counts ranged from 200 x 106 fibers/L to 2000 x 106 fibers/L, filtered water fiber counts frequently exceeded 1 x 106 fibers/L. Even so, striving to attain a filtered water turbidity of 0.1 ntu resulted in improved fiber removal.Pilot scale and distribution system research projects have shown that asbestos cement (AC) pipes can be protected from dissolution and leaching effects that can result in release of asbestos fibers into drinking water. Suggested techniques include modifying low pH, low alkalinity waters so they are not aggressive; coating the pipe wall with a chemical precipitate; and applying a cement mortar lining to the pipe wall.Operation and maintenance practices related to the distribution system, when AC water mains are in service, can influence the fiber count in tapwater. Main flushing can stir up sediment that accumulates in low-flow and dead-end areas, raising the fiber count. If mains are tapped and the cuttings are not flushed away through the tapping machine, but are instead permitted to fall into the water main, the fiber count can be raised.

show abstract

“…Estimates of the solubility constants for reactions (2) and (3) were obtained by using an internally consistent set of Gibbs free energy of formation data22 at 25% and, at 101 kPa (1 atm) pressure, are 10-8,8 and 10-16, respectively.…”

Section: Mechanism Of A-c Pipe Dissolutionmentioning

confidence: 99%

The behavior of asbestos–cement pipe under various water quality conditions: Part 2, theoretical considerations

Schock¹,

Buelow²

1981

Journal AWWA

Self Cite

View full text Add to dashboard Cite

A water chemical model involving the complexation and solubility equilibria of calcium, magnesium, zinc, iron, manganese, silica, chloride, orthophosphate, and carbonate has been developed and applied to laboratory pipe‐loop‐coupon and field data on asbestos–cement pipe. Calculation of the saturation states of the relevant solids enables graphic guides to be prepared for the prediction of dosage levels for in‐situ pipe coating by zinc compounds as well as protection afforded by coatings formed by natural inhibitory constituents of the water.

show abstract

The Behavior of Asbestos–Cement Pipe Under Various Water Quality Conditions: A Progress Report

Cited by 16 publications

References 4 publications

Condition Assessment Methods for AC Pipe and Current Practices

Condition Assessment Methods for AC Pipe and Current Practices

Engineering and Operating Approaches for Controlling Asbestos Fibers in Drinking Water

The behavior of asbestos–cement pipe under various water quality conditions: Part 2, theoretical considerations

Contact Info

Product

Resources

About