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Introducing PreFiS®: An innovative steel tube connection by Tube-Mac®.
- Metal-to-metal sealed steel tube connection
- Suitable for welded and seamless carbon steel and stainless steel tube/pipe
- Fittings in carbon steel and stainless steel from 10.0 mm to 88.9 mm tube and ½” to 3″ pipe
- Customized PreFiS® tubes with reduced wall thickness on special request
- DNV, LR, and RINA approved for 140 bar water mist and wash water systems
- Easy and fast installation with a press tool and a hydraulic pump – both supplied by PreFiS®
- Press fitting installs in seconds
- No expenses for NDT, such as x-raying
- No threading or welding needed; ideal for use on board vessels or in confined areas
Fittings in nearly every form and size with customized solutions available
Turned parts
1. End plug
2. Straight nozzle connector
3. Straight coupling with or without stop
4. Female stud coupling
5. Male stud coupling
6. Reducing coupling
Forged parts
7. 90° nozzle adapter
8. Nozzle connector tee
9. Equal cross
10. Reduced cross
11. Equal tee
12. Reduced tee
13. 90° angle

Our press tools



Our hydraulic pumps


Contact us today for more information.
Success stories
MEYER WERFT
Successful customer relationship with MEYER
WERFT in Papenburg for more than 20 years.
PreFiS® Solution
- A broad variety of PreFiS® fittings in stainless and carbon steel
- Installation of fittings in every cruise liner manufactured at MEYER WERFT in Papenburg for high-pressure water mist, CO2 systems and high-pressure cleaning


NYT OUH Hospital
Supply of a high-pressure water mist system to
the biggest construction site in Odense, Denmark.
PreFiS® Solution
- Supply of a complete system of fittings,
tubes, and tools - More than 100,000 stainless steel PreFiS®
fittings ranging from 15.0 mm to 60.3 mm - Approx. 250 km of welded stainless-steel tubes
- Regular call-offs directly from Germany


Do's and Don'ts
Participation in a technical workshop is required for the use of PreFiS® tools and fittings. Participation is confirmed by a certificate. This workshop can only be conducted by PreFiS®. Changes to this rule must be recorded in writing. PreFiS® accepts no liability for damage caused by improper use of PreFiS® tools or fittings.
In the case of a defect in materials supplied by PreFiS®, this defect must be communicated immediately to the PreFiS® team at info@prefis-fittings.com.
In the case of a complaint, PreFiS® will provide a complaint report to be completed and returned to the PreFiS® team at info@prefis-fittings.com.
If you have any questions, please contact: info@prefis-fittings.com
DO
Installation of PreFiS® fittings and tubes
- by plumbers, sanitary fitters or similar AND
- only after participation on the PreFiS® technical workshop and attestation by certificate
DON'T
NO installation of PreFiS® fittings and tubes
- Without proper training, e.g. plumber, sanitary fitter, or similar AND
- without participation on the PreFiS® technical workshop; certificate not available
Testing the tubes before processing

An inspection must be carried out: The tube surface must not show any scores / scratches (> 0.1 mm) or dents on / at the tube. The tube surface must be clean. If necessary, the tube must be machined before processing.
An inspection must be carried out: The tube surface must not show any scores / scratches (> 0.1 mm) or dents on / at the tube. The tube surface must be clean. If necessary, the tube must be machined before processing.
Tube must fit into the fitting and may have a little slack.
Tube does not fit into the fitting.
Tube must be within dimensional specification.
Tube is not within specification e.g. out of round.
Check the outside diameter with calliper at least 2 points crosswise.
Tube diameter is too large or too small.
Measuring as follows:
Wall thickness

Outer diameter

DO
DON'T
Tube must not have rolled skin or rust.

Only process tubes without paint or coating.

Tube with rolled skin or grate must not be used.

Tube must not have paint / coating.

Preparing the tubes for the pressing process
Maximum permissible cutting angle is 5°. Only use Band Saw suitable for the material.

Tubes that have been cut with > 5° cutting angle must not be used.

Tube must be deburred inside and outside.

Tubes are not deburred.
The tube must be marked with a waterproof pen through the 3 slots in the marking tool before pressing.

Tubes are not marked.
Testing the fittings
Visual inspection of the fittings
Only undamaged or complete fittings may be used.

Damaged / incomplete fittings must be sorted out, e.g.:
- loose or missing rings
- fall from a great height
