ISTT Educational Webinar Series

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

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

Speaker: Tiia Lampola, Head of the Network Unit, Riihimäen Vesi (Riihimäki Water, Riihimäki, Finland)
Overview: Water and sewer networks are inspected annually only a few percent of the total length.
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.
The presented inspection methods and stages of 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
With the results from the prescreening phase, it is reasonably easy to choose the right Condition Assessment and Sewer Inspection (CASI) tool for a certain pipeline or area of pipe network. Several of the CASI tools require pre-phase work, such as precleaning or -washing. This phase is often more expensive and more time-consuming than the actual CASI tool.

About Ms.Tiia Lampola

Tiia Lampola has more than 20 years of experience in water, sewer and stormwater management and networks. She has been working on planning and supervising networks from pre-plans to construction plans. She has experience with condition assessment and pipe inspection methods. She has published a guide book (Condition Assessment and Sewer Inspection (CASI) Methods: A Guide Book) in September 2019 as well as many peer-reviewed articles and conference papers. Lampola has supervised several theses and has worked as a teacher in the university of applied sciences.