The F-Line system has been designed for the realization of networks for compressed air, vacuum, neutral gases (argon and nitrogen) and for the construction of industrial plants (edges lines and servo machines). Thanks to the high technology used in the fittings design. The F-Line is a quick assembly system with a perfect pneumatic seal and a remarkable mechanical endurance. Moreover the special aluminum alloy of the pipes, coated by hot electrostatic paint, and the special tecnopolymer coating used for fittings don't give any problem to the contact with compressor lubricating oils and minimize the corrosion to the internal and external surfaces always guaranteeing a clean air and a long life in normal working conditions.

The easy assembly, thanks to the light pipe and to the fitting connection without any welding or glue, the possibility to reuse and dismountfittings together with a quick installation, are important advantages to be analysed when you choose an industrial plant for fluids distribution.

The threaded fittings and the brass ball valves make the F-Line system extremely flexible and easily integrable with any other kind of system existing in the market, improving the performance of air delivery and consequently the energy consumption thanks to the low friction factor, to the large inside pipe section and to the total absence of constrictions and internal restrictions of the pipe-fitting system.


  • Plant Design

    Here below we show you tables, graphics and technical details to design a line. We suggest you to realize lines through a closed ring because it guarantees a more equilibrate flow and it allows also to use the ring as an airstorage, helping to keep the pressure value constant, especially for a sudden air request; moreover, using the closed ring, it’s possible to cut parts of the plant in order to set it, to modify it, to enlarge it without any complete stop of the air production in the firm. We remember you that F-Line has to be installed after the tank and in any case after the air drier. We also recommend you to use a soft pipe for connecting to the network in order to prevent eventual shocks and vibrations; all maintenances and changes have to be done when the system is totally drainaged. The designer must fix the minimum needed pressure for each use considering that far from the compressor the available pressure will decrease because of frictions by the flow speed or because of the pipe section changes, direction changes or for any withdrawal of air from other users.





    According to the distance from the compressor to the most distant user and to the required flow, this table let you calculate the best F-Line diameter for your network, taking in consideration that the values refer to a closed ring at a pressure of 8 bar with a maximum pressure loss of 5.




    This table is an another useful help in order to get a right plant dimensioning. Each fitting determines a loss of charge and the table indicates the correspondence to pipe meters for every assembled fitting; the equivalent length obtained from all fittings will be added to the average length of the installed pipe.

  • Quick Derivations

    The F-Line quick branches have been designed to allow the final user to get a quick branch without cutting the main pipeline. Moreover, thanks to its special design, the air intake of the descent is positioned above the level where the condensation collects in order to grant an excellent air quality.


    From the picture you can see that the air intake is positioned above the lowered level of the condensation


    Position the branch according to the applicative requirement

    Mark the chosen position near the reference notches


    Rotate the branch by 180° and position it near the reference marks previously layed out

    Hole the pipe by a bimetallic hollow mill inside the template

    Remove the branch and clean the hole with the help of the special deburring tool


    Fix the branch and aligne the reference notches again to the marks you layed out

  • Termal Expansions

    Most materials change their dimensions according to temperature variations. Metal materials are more liable to lower variations than plastic ones. Usually they expand when the temperature rises and contract when the temperature drops. Here below some examples with the most common materials.

    It's important to check the dimensional changes due to temperature variations in order to avoid that the expansion/contraction effects may cause heavy damages to the plant; for that reason it’s necessary to sustain and bracket the plant in order to let the pipeline free slide between two fixed points or otherwise to insert a compensator between two fixed points if they are positioned at a distance which may cause sensible contractions/expansions. 

    For the system F-Line with aluminum tube this coefficient C is equal to 0,023 mm/m/°C.


    Table of contraction - expansion depending on the length L of a straight stretch and the temperature difference ΔT

    The design and the construction of any plant will consider this phenomenon which is calculated with the following formula:

    ΔL = d x L x ΔT


    d = coefficient of lateral expansion

    L = length of piping

    ΔT = difference of temperature in °C

    ΔL = difference of length (expansion or contraction)


    For this reason we suggest you as compensation method the “LIRA” one, obtained with rigid pipes or direction changes with flexible pipes which are perfectly homogeneous with the plant and of easy and cheap installation. Moreover the soft pipe F-Line suits easily to the other fittings of the range thanks to aluminum end fittings which allow an immediate installation without any preparation or cut. Even though its strength keeps minimum bending radius, it shows a reduced block which avoids any mechanical constriction on the network, it also offers an excellent compatibility with lubricating oils for compressors.

    D = diameter   -   L = flexible tube length


    L= pipeline length at the installation   -   L1= length with minimum temperature   -   L2= length with maximum temperature   -   ΔL= length difference due to ΔT   -   B= length of the arms of the Lira or of the direction change
    A= sliding bracketing   -   C= fixed bracketing


    Avoid anchoring the expansion joint to two connections aligned to the same plan

    Always install the expansion joint facing upwards and not downwards in order to avoid a deposit of the condensation

    This is the correct application of the installation of expansion joint. It should be facing up and with two elbows aligned. You need also to insert two clips on the pipe aluminum fasteners close to the installation of an expansion joint


  • Bracketing Method

    For the F-Line pipes anchorage it's necessary to use the brackets of the catalogues. A special attention has to be paid in choosing the pipe brackets as they have to keep the pipeline perfectly straight and sustain the pipeline itself and the weight of all the sliding accessories as well as fix all the brackets well. For that reason the brackets are positioned in order to avoid any contact with fittings or other accessories liable to block the sliding of the pipe.

    D= Spancing in meters related to the maximum temperature difference

    The F-Line safety stop can be used both in horizontal or vertical position. Place the safety stop at the desired height and open the hook with a screwdriver


    All pipe brackets packagings contain an M8 hexagonal nut to be inserted in the foreseen site inside the bracket (by using a threaded bar). It's also possible to use self-tapping screws with a screw-anchor in case of installation on a wall or concrete


    You can secure the safety stop to any type of clamping system and then insert the tube into the safety stop and set the hook


    The range of fasteners should be supplemented by the modular spacers that act as compensation to put the base of the safety stop

  • Installation

    The F-Line system has been designed according to the installer's and the end user's needs. For that reason the flexible system allows to realize networks for compressed air easily, quickly and technologically advanced. However the installation has to be well done from qualified personal by following the indications supplied with the maximum precision, in order to obtain the requested safety, reliability and performance results. During the installation we suggest you to seal all threads accurately using suitable products in proper quantities and to foresee the possibility of segmenting parts of the pipeline which are liable to maintenance, not to be forced to stop the piping system totally.

    We also recommend that pipelines have to follow a light slope towards a condensation collection and a draining point. All maintenance operations must be done with the drainaged system and it's advisable not to lay the system underground in order to grant its constant maintenance or, if necessary, in case of canalization, provide the system with sump pits. In order to obtain an excellent quality of air, we suggest you a good filtration level before blocking the air inside the pipeline.


    Check the pipe surface condition and make a neat and straight cut at right angle at the desired size


    Chamfer the just made cut on the pipe external surface and remove any deburr and cut scraps which may be present inside the pneumatic equipments


    Fully tighten the fitting ring nut without excessively forcing


    Visualize on the pipe the depth to stop indicated by the socket depth meter, then unscrew the ring nut, previously completely screwed, having it make half a counterclock turn


    Lubricate the contact surface of the o'ring gasket with vaseline grease or other suitable sliding means and introduce the pipe into the fitting pushing it to stop


    Ø16 > 38 mm

    Ø20 > 48 mm

    Ø25 > 52 mm

    Ø32 > 62 mm

    Ø40 > 70 mm

    Ø50 > 79 mm

    Ø63 > 95 mm

    Ø80 > 114 mm



    Fully tighten the ring nut and then rotate up to 180° maximum using a pin wrench of suitable size


    If the fitting has been tightened correctly the ring nut base will stop in the middle of the tightening indicator. The ring nut brake will act as anti-screwing in case of excessive vibrations