Liner Testing in Europe-Methods,Standardization and Experience
The article is essentially dealing with new a system of quality control applied in an increasing number on German relining job sites.The system was worked out since 2004/2005 by a round table group of recognized experts initiated and organized by eight southern German cities.This group agreed on the most proven and scientifically sound,most reliable and most evident testing methods based on existing DIN EN ISO standards.The results are compiled in the two brochures DWA 143-3 and DWA 144-3 (DWA: German association of water industry,wastewater and waste).Additional Technical Terms of Contractwere introduced in order to make the new system and its rules legally binding for CIPP jobs.The new system covers a number of quality related measures on the job site including sample preparation and it defines a two-step lab investigation of the sample.If the sample passes step 1 the liners′ material properties are accepted.If the sample does not pass it is investigated more in detail in step 2 to make clear what the problems are and how to overcome them.Additionally,the new system is providing a standard static liner design that makes individual static calculations for usual relining job sites (significantly damaged but stable sewer,no peculiarities) superfluous.
CIPP Needle Felt Liner Glass Fiber Reinforced Liner Additional Technical Terms of Contract 2-Step Quality Control of Liner Samples Technical Methods of Lab Control Composite Thickness and Total Liner Thickness Standard Static Liner Design a Modern Approac
Jürgen Alexander Reinhard Lorenz
Professor, Managing Director, SAERTEX multiCom GmbH, Germany, 48369 Saerbeck, Brochterbecker Damm 52 Professor, University of Applied Science Muenster, IKFM, FB 01, Laboratory for Polymer Chemistry and
国际会议
北京
英文
1151-1157
2012-10-14（万方平台首次上网日期，不代表论文的发表时间）