You might think that joining two pieces of copper pipe together is a simple process, but there are actually several different methods that you need to choose between. Which option is most appropriate will depend on a range of factors including the conditions where the pipe will be situated and the substances it will be used to transport.
Soldering
Soldering is generally used for sanitation and drainage pipes, or for water lines. First flux is used to clean the surfaces, then the pipes are heated with an open flame. Finally, a melted filler material, known as solder, is used to join the pipes together. Temperatures can be anywhere from 175°C to 450°C. Electrical resistance can be used to create soldered joints with heat but no flame. Soldered joints have capillary fittings
Brazing
Brazing is similar to soldering, with capillary fittings and a melted filler metal inserted between the copper pipes. The main difference is that in this method temperatures are higher (between 600°C and 800°C), making stronger and closer-fitting joints. Brazing is used for pipes in refrigeration, air-conditioning and situations where the temperature can increase to 175°C.
No Flame
Sometimes, conditions and materials mean that flames and high heat are inappropriate or unsafe methods for joining pipes. In these cases, no flame joints may be the best option. They are often used in underground settings, or for pipes that may need regular disconnection and reconnection. There are different subtypes of no flame joint, including flared, roll groove, press-connect and push-connect. Modern copper pipe connectors such as press systems are available from many suppliers, including watkinspowis.co.uk.
The choice of creating a soldered, brazed or no-flame joint is an important one that will have significant implications for the safety and effectiveness of your pipes. You need to carefully consider which you will use.