How lengths of pipe and pipe fittings are actually connected together would seem, on the face of it, to be a relatively simple exercise but in fact it is a very complex issue.

It is possible to use pipe flanges, but this is an expensive option and is really only suitable for situations where the pipework has to be dismantled for maintenance, as all bolted flanges introduce a weakness.

It is possible to use a threaded connection where the end of one pipe is screwed into the end of another pipe. This method is commonly used for smaller pipe sizes. However the cutting of the thread reduces the thickness of the pipe material and so again introduces a weakness.

The preferred option for joining pipe lengths is a welded joint. But again there are different options depending upon the application. The most common type is the butt weld. This is a connection between two pipes of the same size. The end of each pipe is bevelled so that when the two ends are placed together a V is formed. The pipes are then welded around this V.

However in situations where there are high pressures and the flow characteristics are important, a socket weld can be used. Here one of the pipes has a larger collar which fits over the other pipe. The weld is then done on the outside. These are easy to use especially on small bore pipes.

Whatever type or pipe connection you propose to carry out, we at Chemipetro manufacture a wide range of pipe fittings and pipe flanges to meet all your requirements.