A detachable threaded connection on fittings is always more optimal for performing maintenance or repairs, since it allows multiple disassembly of pipeline parts. Pipeline sections connected by soldering or welding, as well as press fittings, become a monolithic structure, which has a positive effect on operational reliability. Compression fittings are not recommended for use in a heating system. The popular question of buyers, how to choose fittings for metal-plastic, polypropylene, plastic, copper pipes, can be answered as follows. When choosing, be sure to consider the ratio of the thickness of the pipe walls to the fittings. Match fittings and pipes to the same size. When choosing steel flanges malaysia take into account their standard size. Try to find fittings made of the same material as the pipes.
Installation of pipes and fittings
We will give small recommendations regarding the installation of polymer and metal-plastic pipelines. Before starting the installation of the pipeline, it is necessary to prepare the pipes. Depending on the material of manufacture, pipes are sold in separate lengths or coiled into a coil. We advise you to pre-measure the required installation lengths directly on site. Measurements are made according to the piping scheme, between the planned connection nodes. After the measurement, the workpieces should be cut. The cut pieces are aligned along their entire length. Then you need to prepare the mounting joints. For this, the pipes are cut with specialized devices, after which the ends are additionally cleaned, the chamfer is removed. Bending of pipes is carried out taking into account the permissible bending radius. When installing fittings, try not to skew the device relative to the pipeline. Mounting fittings by soldering or welding requires the necessary set of equipment and tools, as well as the necessary skills.
General selection recommendations
You can choose fittings for metal, polypropylene, and other types of pipelines, following the following tips: be sure to take into account the ratio of the thickness of the pipe walls to the fittings; when choosing press fittings, take into account their standard size; choose devices made of the same material. Seek advice from experienced professionals.
The word “fitting” comes from the English language and means a device for connecting parts of a pipeline. By type of destination, devices are divided as follows:
- Couplings – connection of pipeline sections of the same direction, of the same or different diameters;
- Squares – connection with a change in the direction of the pipeline;
- Tees – the union of three sections of the pipeline of different diameters, at different angles;
- Cross Pieces – connection of four perpendicular sections of the pipeline;
- Plugs – sealing the ends of the pipeline.
Fittings are manufactured from various materials. The greatest use is found for fittings made of steel, brass, polypropylene. Metal fittings must be covered with anti-corrosion protection. Metal pipes for heating are connected with threaded or crimp fittings made of metal. We will separately list the types of fittings for installing copper heating pipes: threaded, compression, capillary, self-locking, and finally, press fittings. Polypropylene pipes intended for water supply or sewerage are connected using solder fittings. The use of combined fittings ensures a reliable connection of a section of a propylene pipeline with a metal pipeline. Polyethylene pipes are installed either by welding using polyethylene fittings, or by means of compression fittings. The connection of metal-plastic pipes with each other or with ball valves is carried out by using detachable fittings, compression fittings or press fittings. Typically, fittings made of brass are used.