Current Status of Sewer Network Renovation in Europe and the Activities of CEN

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1 Global Standardization - How will it Contribute to Sewage Works in Japan? Current Status of Sewer Network Renovation in Europe and the Activities of CEN Dr John Gumbel Convenor ISO TC138 WG12

2 Global Standardization - How will it Contribute to Sewage Works in Japan? Or How the Activities of CEN have Influenced Development of Sewer Network Renovation in Europe

3 Overview of Presentation Aspects of sewer network renovation covered by European Standards, but not (yet) by ISO History of development of European Standards and their regional impact How adoption of International Standards and engagement in their further development could benefit Japanese Sewerage Industry

4 What is CEN? Independent of EU 31 National Members National Standards Bodies of EU (27) and EFTA (3) member countries, plus Croatia NSB examples: UK - BSI, Germany - DIN, etc.

5 European Union Population 500 million Leading countries in sewer network renovation: Germany UK France Scandinavia Netherlands

6 Relevant CEN Technical Committees TC 155 Plastics piping systems and ducting systems Equivalent of ISO TC138 Product and test method standards Scope of WG17 Renovation same as ISO/TC138/WG12

7 Relevant CEN Technical Committees TC 165 Wastewater engineering No equivalent in ISO! Led by users, not manufacturers Functional and performance standards for networks and treatment plants Product standards for pipes and system components of materials other than plastics

8 CEN TC 165 Wastewater engineering Relevant Working Groups WG22 Drainage outside buildings WG1 General requirements for pipes WG13 Renovation and repair of drains and sewers WG12 Structural design of buried pipelines

9 CEN TC Key new standards EN 752:2008 Drain and sewer systems outside buildings Framework for planning, design, construction, rehabilitation, operation and maintenance Final Draft FprEN 15885:2010 Classification and characteristics of techniques for renovation and repair of sewers and drains Extends scope of EN ISO to include repairs as well as renovation, using all materials (not just plastics), for sewer applications only

10 Terminology and classification Rehabilitation Maintenance & Repair Renovation Replacement Cleaning Coating Open cut Local repair Lining Trenchless Injection sealing Mechanical devices CIP components Families using plastics Close-fit pipes Cured-in-place pipes Sprayed concrete.. Micro tunnelling Pipe bursting Pipe reaming etc

11 High Level Standard puts rehabilitation in user context

12 EN Sewerage Standards Framework Objectives Functional Requirements Principles Detailed Standards Product Standards and Client Specifications

13 Objectives Objectives Functional Requirements Principles Public health and safety Occupational Detailed health Standards and safety Environmental protection Sustainability Product Standards and Client Specifications

14 Functional Requirements Objectives Functional Requirements Flood protection Maintainability River protection Groundwater protection Odours & gases Noise & vibration Principles Detailed Standards Use of materials Use of energy Structural integrity Maintaining flow Watertightness Adjacent structures Product Standards and Client Specifications Inputs quality

15 Performance requirements Functional Requirements Performance requirements Design standards

16 Principles Objectives Functional Requirements Principles Detailed Standards Principles of Planning Rehabilitation Design Operations Construction Maintenance Product Standards and Client Specifications

17 Integrated Sewer System Planning

18 The Plan Operations and Maintenance

19 Design Principles EN 752 covers: Types of Systems Layout and Profile Hydraulic Design Environmental Design Structural Design Operational Design but referenced structural design standard EN 1295 does not cover renovation liners

20 Sewerage Standards Framework Investigations EN13508 (condition assessment incl. visual coding) Objectives Relevant Related Standards Functional Requirements Design & Construction Principles EN Detailed ISO Standards & EN (renovation+repair) EN (new trenchless) EN 1610 (includes leaktightness test) Product Standards and Client Specifications Management & control EN (sewer cleaning & rehabilitation)

21 New standard complementing EN ISO Published today!

22 Scope of EN ISO (reminder) Covers water and gas applications as well as sewers and drains Limited to techniques where plastics liner pipe is main structural component, e.g. - lining with continuous (sliplined) pipes - lining with close-fit (deform/reform) pipes - lining with cured-in-place pipes

23 Scope of EN Renovation technique families added: Lining with formed-in-place pipes Lining with pipe segments Lining with sprayed or cast-in-place material all include RIGID cement grout or concrete as part of STRUCTURE

24 Lining with formed-in-place pipes Includes grouted spirally-wound pipe where plastics component has insufficient ring stiffness of its own New EN complementing ISO in preparation

25 Lining with spirally-wound pipes: 2 types Wound from manhole pipe with ring stiffness Wound inside pipe as permanent formwork for rigid structural grout

26 Lining with pipe segments

27 Lining with sprayed concrete etc.

28 EN Repair technique families Man-entry and robotic methods

29 EN In next revision, scope to be extended to include Replacement by Pipe Bursting No EN standards yet in preparation for PE pipes with special crack-resistant inner and/or outer layers now on market, but terminology defined by ISO/PDTR/27165 PE pipe engineered to resist abrasion damage and/or internal cracking due to external point loads

30 History of standards development in Europe CEN established to help remove the barriers to trade of different national standards Important difference from ISO: under EU Directives some EN standards called up in legislation Early standards developed mainly by manufacturers not all successful! Increasing motivation for users to participate in standards development

31 Good and bad product standards Some early standards for established products lowest common denominator Example of manhole covers to EN 124:1994 dimensional tolerances so large that they are generally not leaktight Renovation standards had advantage of no competing national interests: do it once, do it right, do it internationally

32 Leaking manhole cover to EN 124 Impact not all bad news - Massive user engagement to put right - Acceptance that cover shape not the issue

33 Renovation standards Requirements set at two product stages: - M -stage (as manufactured) - I -stage (as installed) Balance of requirements depends on degree of site processing for each technique family: continuous pipes discrete pipes M close-fit pipes cured-in-place pipes I

34 Product Quality Assurance Requirements (ISO and CEN) - What and How to test Assessment of Conformity (CEN only) - When and How frequently to test - Type testing (for certification) - Verification testing ( M or I stage) Amount of testing in practice a matter for individual client or country choice

35 Balancing user vs producer interests Experienced users/network operators concerned with whole life costs prefer tougher standards, more durable products Less developed countries more concerned with current cost Manufacturers interested in export sales Too much prescription stifles innovation, but need to meet key functional requirements Balance achieved by more user participation in standards development process

36 Reflecting regional differences Functional requirements can vary by region: example UK prescribes self-cleaning sewers, but Netherlands too flat for this! Less developed countries benefit most from high level standards such as EN 752 More developed countries benefit from information exchange

37 European Union Population 500 million Leading countries in sewer network renovation: Germany UK France Scandinavia Netherlands

38 European Union Experience and expenditure on sewer network renovation not uniform: Old northern states most active In southern states (Portugal, Spain, Italy and Greece) water supply networks given priority New member states to East are catching up Influence on standards and national impacts differ accordingly

39 Summary of European experience ISO standards like most ENs are voluntary and intended to promote trade, not impose regulation on domestic industries In new areas of technology they give confidence to buyers of both goods and services Not all current standards are perfect but are improving through increasing user participation in the democratic drafting and revision process Take-up rates vary, but countries that engage actively in standards development and adoption stand to gain most

40 Conclusion - Discussion Thank you for your attention Any recognizable lessons for Japan from European experience?