Pipes are used everywhere and the way they are connected is very important because poor joints can cause leaks and damage. Different connection methods are used for different jobs and they depend on pressure, pipe size and cost.
Flange Connection
A flange connection joins two pipe ends with bolts and a sealing gasket and it is used in large industrial systems because it can handle high pressure. These joints are also easy to open for repairs but they can be expensive to install.
Threaded Connection
Threaded connections use screw threads to join pipes together and they are common in small plumbing systems and gas pipes. This method is quick and simple but the joints may weaken under strong pressure or vibration.
Butt Welding
Butt welding joins two pipes by heating and melting the ends together and this makes a very strong connection with little chance of leakage. It is used in oil and gas pipelines. The UK Health and Safety Executive says that badly maintained pipelines can create serious safety risks in industrial systems.
Grooved Connection
Grooved connections use clamps and rubber seals to join pipes. Many copper pipe connectors, such as the examples here: watkinspowis.co.uk/products/copper-pipe-fittings-and-press-systems, use quick-fit connection methods to save time during installation.
Socket Connection
A socket connection works by pushing one pipe end into another wider end with a rubber seal. It is often used in underground drainage and water systems.
Socket Welding
Socket welding is like socket connection but the joint is also welded for extra strength. It is often used in smaller high-pressure systems.