ALKA S.r.l.
Registered office: Via Teodoro Frizzoni 19 - 24121 Bergamo - Office: Via Molino Baertsch, 4 - 24124 Bergamo
Tel. +39 035 664881, Cell. +39 335 355569 - E-mail: info@alka-srl.com , PEC postmaster@pec.alka-srl.com
Bergamo Business Register, EORI, Tax Code and VAT No. IT02515810162 - Recipient code T04ZHR3
BG050196 mechanographic number, REA: BG 300962, Share capital €10,400.00 fully paid up.
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1- Cleaning of new pipeline for Liquid Oxygen (105m)
Example of cleaning a new line for the distribution of liquid oxygen. In this case, the projectiles were pushed by the pressure provided by a nitrogen cylinder. As you can see, welding residues and other dirt have been removed. Subsequently, projectiles soaked in degreasing liquid were fired, followed by dry projectiles to remove product residue. The nitrogen further helped to dry the inside of the piping.
2- Refurbishment of an old liquid oxygen pipeline
In the video you can observe the procedure carried out to clean and degrease the existing liquid oxygen line in order to make it usable again. The pipe showed clear signs of rust corrosion, the removal of which required shooting several dry projectiles of different diameters to gradually remove the coarser debris. After removing the rust deposits, a degreasing product was applied to the entire inner wall, soaking other projectiles with this product and passing them through several times to remove any excess degreasing liquid inside the pipe. To finish, a dry projectile was shot through for fine cleaning and removal of any trace of residue, both rust and degreasing liquid, thus leaving a clean and dry pipe ready for use.
This type of operation allowed the customer to save several thousand euros and a considerable amount of workdays that would have been necessary to replace the underground pipe, whereas in our case the cost was dozens of times lower and the time required for cleaning was less than two hours.
3- Cleaning copper heat exchanger coil for refrigerant gas
This video shows the cleaning operation of a copper coil for refrigerant gas, in order to remove various types of impurities such as: oils, welding residues, dust, and soot left over from the production of the copper tube itself or from subsequent processing; a fundamental operation to prevent mechanical failures caused by these impurities passing through components such as compressors and valves.
Firing a projectile inside each individual section of about 38m in length takes just 5 seconds. Repeating the operation a total of 3 times was sufficient to achieve the desired result.
4- Laser welding, cleaning and degreasing of flexible hoses for Nitrogen
This video shows the degreasing operation of flexible pipes, inside which nitrogen passes, before being mounted on a robot for laser welding.
The pipes, purchased from an external supplier who handles their assembly, showed traces of oil inside them resulting from the fitting process. The cleaning operation may require several steps until a satisfactory result is obtained, but only a few minutes are usually sufficient.
In this way, it is easy to check the quality of the incoming pipes and ensure that a simple production residue on such a simple component does not compromise the performance and reliability of a much more sophisticated system.
5- Cleaning of Oxygen and Nitrogen piping for laser cutting
In this cleaning operation of a plant for the transport of nitrogen and oxygen for laser cutting, it was necessary to remove any contamination and processing residue that could damage and clog the machines. Due to the configuration of the system, with progressively narrowing diameters, it was necessary to use the Food&Flex projectile, which is more adaptable in these situations. In fact, the line started with an internal diameter of 30mm, narrowing to 19, and ending at 15mm. In the video, you can also see a temporary solution adopted for the insertion of cleaning liquid inside the vertical drops, by connecting a U-fitting, into which the liquid is poured and then shooting the projectile, choosing to connect with direct air via a quick coupling, given the considerable length of the line (115m).
6- Cleaning and degreasing 154mm Pipes
This video shows the cleaning of a section of refrigerant gas piping used to supply the turbine of the air conditioning system, carried out by our partner System Fluid s.r.l.
The welded and flanged pipe, with an internal diameter of 154mm, is cleaned after its construction but before installation; this makes the cleaning operation more convenient. In this case, it was necessary not only to remove machining residues, but also to degrease the pipe itself, which is why the projectile was soaked with a degreasing product and then shot several times, and finally another dry projectile was shot to absorb any residue. The shooting operation was carried out, given the large diameter, without the aid of the gun, but by blowing nitrogen through a flange connected directly... at a pressure of about 8-10 bar.