technical
Technical Documents (Click to View)
- Brief Overview (mostly images)
- Press Fit CuNi 90/10 Piping (Tubing) - Technical Brochure
- Pipe Size & Working Pressure
- Class Approvals
- Shock test to international Military Specification
- Vibration test to international Military Spec
- Fire test to 850°C
- Straub Couplings – Removable & Repair Clamps
- More technical information available on request
Material
Tube:
All Tube is precision cold-drawn in 90/10 Copper Nickel alloy according to UNS C 70600 USA standard. All Copper Nickel tube is supplied in 6 meter lengths.
The CHIBRO Press Fitting System requires a particular Tube which is not replaceable with any other Copper Nickel Tube. The Tubes mechanical characteristics make it easy to work and safe and enduring in operation.
All Tubes are marked with indelible inks that provide details of the producer, item number, material, dimensions and batch along the whole length.
The range of Tube dimensions available is as follows:
| OD mm | 15 |
18 |
22 |
28 |
35 |
42 |
54 |
76.1 |
88.9 |
108 |
| W/T mm | 1 |
1 |
1 |
1.5 |
1.5 |
1.5 |
1.5 |
2 |
2 |
2.5 |
Fittings:
Fittings are made from 90/10 Copper Nickel alloy according to UNS C 70600 USA.
Welding, where necessary, is carried out with automatic welding machines by certified personnel.
This is followed by the insertion of the o-ring and marking with a laser system to identify the item number, the manufacturer, the date of manufacture and the O.D. of the Tube to be inserted.
Each Fitting has a toroidal groove with an “O” Ring installed.
Pressing Tool
The Tooling is a simple Battery/Electric product that is used in conjunction with a set of interchangeable jaws according to the diameter of pipe to be coupled.
When the tool is in operation the jaws generate an automatic controlled deformation of the fitting and pipe to form a permanent watertight joint.
The technical data of tools and their operating instructions are provided in the relevant catalogue on request.
How it works
Tube is simply cut to the length required, de-burred and the Fitting of choice is simply slipped onto the tube until it reaches the stop. The Fitting is then pressed onto Tube via the use of the Pressing Tool with the correct “Jaw” attached. This creates a water and gas tight seal in a few seconds. The water tightness is produced by the compression of the “O” Ring within the Fitting with mechanical strength being achieved via the slight deformation of the Fitting and Tube.
Please read Manufacturer catalogue and brochure for more detail.
Why use Copper Nickel?
Copper Nickel (CuNi) is widely used in marine applications as it is highly resistant to Sea Water Corrosion. The longer that Copper Nickel is exposed to Salt Water the slower its rate of corrosion becomes. Copper Nickel also has very high antifouling characteristics. A thin, adherent and protective oxide film gradually forms on Copper Nickel when it is exposed to clean salt water, this makes it very difficult for marine growth to colonise, thus flow rates are maintained. Copper Nickel alloys have provided reliable service for several decades whilst offering effective solutions to technological challenges.
90/10 Copper Nickel hull with no anti fouling after 4 years at sea.
See the following link for more detailed information in relation to Copper Nickel alloys. http://www.copper.org/applications/cuni/default.html