Pipe seals are an essential component of pipelines that transport various liquids and gases, such as water, chemicals, oil, and gases. The selection of sealing materials is crucial and depends on the type of fluid or gas being transported. For instance, if the liquid is potable water, EPDM with specific standards must be used. On the other hand, non-potable water requires the use of EPDM or SBR seals/gaskets. For transporting oil, chemicals, and gases, NBR (Nitrile) seals/gaskets are used. Choosing the appropriate sealing material ensures the safe and efficient transportation of the fluid or gas, preventing leakage and damage to the pipeline.
One crucial step in the construction of pipelines is the proper installation of pipe sealing rings also called commonly as pipe seals or pipe gaskets, as it helps prevent leaks and water infiltration. In particular, installing EPDM sealing rings for pipe systems like GRP and concrete pipes can be difficult and failure in installing properly can even pose a risk to the safety of the public and the environment. Additionally, the installation process is often complicated by tight spaces, difficult angles, and other site-specific factors that can make it difficult to achieve a secure and reliable seal. In this blog post, we’ll discuss four common mistakes that contractors should avoid when installing EPDM sealing rings, and provide solutions to help ensure a successful installation.
Problems Faced by Pipe Sealing Contractors
EPDM sealing rings are commonly used in pipe systems like GRP and concrete pipes to ensure a reliable and long-lasting seal. However, installing these sealing rings can be challenging for pipe contractors. Some of the problems that they face include:
- Longevity of the seal– The seal is a critical part in the entire pipeline and it is very difficult to replace it often. The use of improper material can lead to leakages in pipes leading to heavy loss of material, damage surroundings, impact on environment and high cost of manpower.
- Compression Set: If the compression set is not accounted for, the sealing ring may fail to maintain its sealing force even with proper installation. Sealing force retention is a critical property for sealing rings used in pipe systems like GRP and concrete pipes. And if the sealing ring does not maintain its sealing force over time, it can lose its sealing properties, leading to leaks and potentially costly repairs or replacements.
- Tight spaces and difficult angles: The installation process is often complicated by tight spaces, difficult angles, and other site-specific factors that can make it difficult to achieve a secure and reliable seal.
- Compatibility issues: Using the wrong type of sealing ring for a specific pipe system can result in poor performance or even failure of the sealing ring.
- Elongation of gasket: Failing to properly prepare the pipe sealing rings, if the gasket has insufficient elongation properties, it may not be able to accommodate the expansion and contraction of the pipe due to temperature changes or ground movement, leading to the failure of the sealing ring and potential leaks.
Despite these challenges, there are several common mistakes that installers can avoid to ensure a successful installation. Here are four mistakes to watch out for:
Mistake 1: Using the Wrong Type of Sealing Ring
One of the most common mistakes that installers make is using the wrong type of sealing ring for the pipe system they are working with. For example, EPDM tear drop seals for concrete pipe are designed specifically for use with concrete pipes, and using them with other pipe materials can result in poor performance or even failure.
Mistake 2: Over-Tightening
Over-tightening the bolts can cause excessive compression and lead to deformation of the gasket. This can cause the gasket to lose its elasticity and lead to leaks. Contractors should carefully choose manufacturers who offer products that are designed to be easy to install and provide quality seals with the right compression set.
Mistake 3: Improper Alignment
Misaligned pipes can lead to misaligned gaskets, which can cause leaks. Contractors should ensure that the pipes are properly aligned before installing the gaskets. This can be achieved by using alignment tools and techniques such as string lines, lasers, and transit levels.
Mistake 4: Incorrect Gasket Size
Using the wrong size gasket can cause leaks, even if it is properly installed. Contractors should ensure that they select the correct size gasket for the pipe diameter and ensure that it fits snugly. This can be achieved by referring to the manufacturer’s specifications or consulting with a gasket supplier.
Solutions for Common Sealing Challenges
