Cured-In-Place Pipe (Cipp) Rehabilitation of Pressurized Potable Water Pipelines, 4 In. (100 mm) and Larger

This standard covers the rehabilitation of existing water mains 4 in. (100 mm) in diameter and larger by installing and curing a resin-impregnated textile tube. It is cured by circulating hot water, introducing controlled steam, or photoinitiated reaction (light). The finished product is a continuous, tight-fitting CIPP.

Format: Paperback / softback
Length: 255 pages
Publication date: 30 September 2022
Publisher: American Water Works Association,US

This standard provides materials and procedures for the rehabilitation of existing water mains 4 in. (100 mm) in diameter and larger by installing and curing a resin-impregnated textile tube. The tube can be inverted into the main using hydrostatic head or air pressure, or pulled into the main and inflated with potable water or air. The CIPP is cured by circulating hot water, introducing controlled steam, or using photoinitiated reaction (light) within the resin-impregnated textile tube. Once cured, the finished product is a continuous, tight-fitting cured-in-place pipe (CIPP).

The CIPP process involves several steps. First, the existing water main is cleaned and prepared to ensure a proper bond between the new pipe and the existing infrastructure. The resin-impregnated textile tube is then cut to the appropriate length and installed into the main using specialized equipment. The tube is either inverted or pulled into the main, depending on the specific application. Once in place, the tube is inflated with hot water or air, depending on the curing method selected. The inflation process helps to expand the tube and press it against the walls of the existing pipe, creating a tight seal.

The CIPP process offers several advantages over traditional pipe repair methods. It is faster and less disruptive, as it can be completed in a matter of hours or days, rather than weeks or months. Additionally, the CIPP process is less expensive than traditional pipe replacement, as it requires less labor and materials. Moreover, the CIPP process is environmentally friendly, as it does not require the excavation of the existing pipe, which can disrupt the surrounding environment.

However, there are also some limitations to the CIPP process. For example, the tube must be installed by trained professionals, as improper installation can result in leaks or failure of the system. Additionally, the CIPP process is not suitable for all types of pipe materials, such as concrete or steel, as it may not provide a tight seal.

In conclusion, the CIPP process is a reliable and cost-effective method for the rehabilitation of existing water mains 4 in. (100 mm) in diameter and larger. It offers several advantages over traditional pipe repair methods, such as faster installation, less disruption, and lower cost. However, it is important to ensure that the CIPP process is installed by trained professionals and is suitable for the specific type of pipe material being repaired.

ISBN-13: 9781647170851