Past Webinars

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2021-10-07 Webinar

Pipe rehabilitation with stainless steel sleeve


Presenter: Christopher Rings and Mark André Haebler
Date: 7 October 2021
Organization: Uhrig Kanaltechnik GmbH

Pipe rehabilitation and repair with stainless steel sleeve is a purely mechanically installation system made of stainless steel and an EPDM compression seal for all common sewer, well, drinking water, and industrial pipes. The stainless-steel sleeve can be used for many different applications. Besides normal cracks, fragmented pipes, or in- & exfiltration you can also use it for root penetration or leaking joints. If the damage is longer than the sealing area of a single sleeve, it can be installed in serial as well.

How does it work?
The system seals and stabilizes the damage completely by mechanical, that means without any chemicals. Furthermore, the system is suitable for all common pipe materials (concrete, plastic and so on). The locking system – which is placed in the inside of the stainless-steel sleeve – ensures that the sleeve stays permanently in position. To expand the sleeve a special packer or special assembly tools are necessary. After the rehabilitation, the sleeve has its own static capability and absorbs the natural tectonic movements of the pipe.
And the WHY, we will explain during the presentation. This will not be a commercial webinar; we also reflect to the IKT report of partial repair and the DWA and EN standards.


◆About Christopher Rings

Mr. Christopher Rings is with Uhrig Kanaltechnik GmbH since October 2020. In his position, he is responsible for sales/support in the European market. Before he came to Uhrig, he worked 10 years for Vetter, a German manufacturer of Pipe Plugs where he gain valuable experience in the European trenchless technology market.

◆About Mark André Haebler (only for Q&A)

Mr.Mark André Haebler, MBA is with Uhrig Kanaltechnik GmbH since November 2017. In his position as Head of International Sales & Development, he is responsible for the world-wide sales, partner support and his team. Prior to his current position, he was part of the management team of Hermes Technologie GmbH, a German leader in trenchless support of manhole rehabilitation based on mortars and gouts. He is also vice president of the Austrian Association of Trenchless Technology and a member of the Board of Directors of the ISTT.



2021-08-05 Webinar

Cured in Place materials and system quality assurance based around a performance specification and site evaluation


Presenter: Ian Ramsay
Date: 5 August 2021
Organization: UKSTT - ViceChair

Cured in Place Pipelining (CIPP) has been around for circa. 50 years. Many thousands of kilometers have been installed successfully around the world since then. Standards such as ASTM and EN/DN have been developed to cover the quality, performance, and strength of the final product. CIPP is not suitable in every case for rehabilitation but is a valuable tool in the box of trenchless techniques.

Various different materials used in CIPP are available from a standard coated felt construction to reinforced layers. Resin technology has developed with various hybrid resins now available in addition to the standard polyester resins, whilst curing methods from ambient to hot water, steam, and UV/LED have also developed over the years.

Identifying the right system or choosing the right materials and processes can be very confusing when looking at a project. 

In this webinar, we will explore the factors around the selection and specification of a CIPP solution which is fit for purpose. It will cover:

  • Who can specify a CIPP solution
  • How a performance specification is developed and executed. 
  • The key factors in the selection process of the materials and curing system. 

We will also look at the project execution itself and QA/QC regarding the setup, time constraints, and various key factors to determine a successful installation and client handover.


◆ About Ian Ramsay

Ian has been involved in the trenchless market for over 25 years. Primarily around CIPP, both large and small diameter, he has worked throughout the world involved in project planning, specifications and material selection & supply. Ian is past chair of the UKSTT and is currently serving another term as vice-chair as well as being a board member of the ISTT.




2021-06-23 Webinar

Repair of lateral sewers and lateral connections - comparison of techniques and quality assurance


Presenter: Dr. Iain Naismith and Dipl.-Ing. Serdar Ulutaş
Date: 23 June 2021
Organization: IKT – Institute for Underground Infrastructure

This webinar highlights the lessons learned from 1:1 scale evaluation of the performance of technologies available for the repair of lateral sewers, particularly the use of patch repairs, and repair of lateral connections.
Smaller diameter lateral sewers which connect properties to main sewers are often in private ownership for at least part of their length, but sewer network owners may own all or part of them and/or be responsible for providing advice to property owners concerning their repair. Poor connections to main sewers are often a cause of groundwater ingress into sewer networks.
This webinar considers the findings from several large scale 1:1 comparative evaluations of the performance of different technologies for the repair of lateral sewers and lateral connections undertaken at IKT on behalf of German sewer network owners. These had a particular focus on the ability of products to stop groundwater infiltration and identifying quality assurance measures to be considered to ensure that installed solution will work effectively.
It will cover:
• Background to the issues
• Comparative evaluation of lateral connection repair technologies
• Repair of lateral sewers, particularly the use of patch repair


◆About: Dr. Iain Naismith
Dr Iain Naismith is a Senior Research Fellow at IKT with 35 years of experience in environmental, water and sewerage-related research. Based in the UK, he has a particular focus on international projects and knowledge sharing for this not-for-profit engineering research institute. He has been involved in the evaluation of performance of sewerage repair and rehabilitation products and products in contact with drinking water for some 20 years.

◆About: Dipl.-Ing. Serdar Ulutaş
MBA is a senior research fellow and head of the IKT Compare testing
programme for the comparative evaluation of technologies. In this role he is responsible for
recruiting sewer network operators for participation in comparative technology/product tests,
development of test concepts, construction of rigs and conducting evaluations.


2021-05-20 Webinar

Sewer Manhole Rehabilitation – quality assurance and comparison of techniques


Presenter: Dr. Iain Naismith and Dipl.-Ing. Markus Gillar
Date: 20 May 2021
Organization: Senior Research Fellows at IKT – Institute for Underground Infrastructure (Germany)

This webinar highlights the lessons learned from 1:1 scale evaluation of the performance of technologies available for the rehabilitated of manholes, with a particular focus on sealing against ground water infiltration.
The surcharging of sewer systems by groundwater impacts both their operation and that of the wastewater treatment works they connect to. Relining sewer pipes is part of the answer, but manhole shafts are also a significant pathway for infiltration.

This webinar explains the approach taken, at the request of German sewer network owners, to provide them with knowledge about performance and limits of manhole rehabilitation technologies and what quality assurance issues they need to be aware of. It will also signpost attendees to where this information is publicly available.

It will cover:
• Sewer manhole functions and the issues associated with them
• How IKT went about examining rehabilitation, defining damage patterns and reviewing the market
• What was discovered about the performance of rehabilitation techniques
• Key issues for applying QA to installations


2021-04-23 Webinar

Pipeline inspections and accurate information for no-dig process, Case in Finland

Pipe inspection

Presenter: Tiia Lampola
Date: 23 April 2021
Organization: Riihimäki Water, Finland

The commonly used CCTV method is quite slow, e.g., due to the requirement of pre-cleaning (or -washing) of the pipelines. The process of choosing the parts of the water supply or sewer network for the inspection process is often also very vague and is made with too little information of the network. Pre-screening and analysis are often neglected or done only partly, which gives too little data for the proper and accurate process of pipeline inspections. See the full report from here.

The presented inspection methods and stages of the inspection process include:
· pre-screening methods
· requirements for the pre-cleaning (or -washing)
· CCTV and digital CCTV methods
· acoustic methods
· electrical and magnetic methods
· inspection methods for tunnels
· inspection methods for manholes


2021-03-25 Webinar

Considerations of Design and Construction for Horizontal Directional Drilling


Presenter: Dr. Samuel Ariaratnam
Date: 25 March 2021
Organization: Arizona State University

This presentation explores considerations of design and construction for HDD and offers insights into ways to increase project success. Technological advancements, design ingenuity, and construction innovations are all key elements that have led to increased adoption of this trenchless method.


2021-01-29 Webinar

Estimating the Jacking Forces for Pipejacking

Microtunneling and Pipe Jacking

Presenter: Prof. Keh-Jian (Albert) Shou
Date: 29 January 2021
Organization: ISTT vice-chair / National Chung-Hsing University, Taiwan

Among the others, pipejacking could be the most popular new installation trenchless methods. Jacking force is critical for a successful pipejacking, in which the control factors include overburden depth, frictional coefficient of soil-pipe interface, overcut, alignment, etc. Empirical formulas of jacking forces were reviewed. Comparisons on jacking forces with case studies were illustrated and discussed. New estimation method was also established and discussed.


2020-12-17 Webinar

A review of developments in UV Cured CIPP lining from its introduction in 1985

Cured in Place Pipeliners

Presenter: Dr. Dec Downey
Date: 17 December 2020
Organization: Trenchless Opportunities Ltd

UV Curing for Cured in place pipelining was developed and launched in the UK and Sweden by Insituform Group and INPipe AB in the mid1980s. It took some time to establish but over the past twenty years has made a major contribution to the growth of CIPP worldwide. It offers certain advantages over more traditional curing methods but requires investment in technology, quality management, and skilled operators to take full advantage of its potential. This presentation will provide an appraisal of the technology and a glimpse at what the future may hold. (This webinar is available to ISTT members only.)


2020-11-18 Webinar

Environmental Impact Assessment of Steam-Cured Cured-in-Place Pipe (CIPP)

Cured in Place Pipeliners

Presenter: Dr. John C. Matthews
Date: 18 November 2020
Organization: Trenchless Technology Center (TTC) Director, Louisiana Tech University, Ruston, LA, USA

This presentation will discuss the findings from a recent study of the potential environmental impacts of steam-cured cured-in-place pipe (CIPP) installations. This comprehensive study collected real data from multiple projects using various sampling methods to determine the extent of any impacts. The objectives of the study were to both evaluate air emissions from steam-cured CIPP and determine potential impacts on workers. This was accomplished by directly measuring worker exposure to emissions for locations onsite or offsite. The installation sites represented a range of scenarios typical of CIPP installations. Dispersion of the emissions were modelled to estimate compound concentrations for a large set of scenarios and weather conditions. The potential health risks were evaluated based on appropriate health-based action levels using the measured and modeled data.