Defence and naval
On board, two sets of rules apply at once: those of the classification society and the customer’s specification. We supply piping material and components to drawing – with certification, traceability and acceptance notified in advance.
Why two sets of rules apply side by side on board
A naval vessel is built to the rules of a classification society – DNV, Lloyd’s Register, Bureau Veritas – and to the customer’s specification on top. Both apply side by side, and the stricter requirement wins. In practice: acceptance has to be notified before production, every item carries its heat number, and the records have to be filed so that in thirty years they still match the part installed. That is what separates a naval project from a merchant ship – not the material, but the chain of evidence.
What we supply for it
Every part to your drawing, with material certificate and documentation.
Prefabricated piping sections to your drawing or isometric
Headers bring steam, water or gas together and distribute it again. We…
The plate in which the boiler tubes end
Bent tube runs that take up or give off heat
Boiler tubes rarely arrive on site in mill lengths. We supply them…
Special flanges, collars and pipe fittings to drawing and works…
Seamless and welded, seawater to steam, from stock or on call-off
Typical materials
The grade follows medium, temperature and pressure. A data sheet exists for every grade.
Standards and codes
| Area | Code |
|---|---|
| Classification | DNV, Lloyd’s Register, Bureau Veritas, RINA, ABS or ClassNK – depending on the build specification |
| Flanges | DIN 86029 and DIN 86030 slip-on, DIN 86041 welding neck |
| Seawater | CuNi 90/10 (2.0872) to EN 12449 and DIN 86019 |
| Stainless | EN 10216-5: 1.4404, duplex 1.4462, super duplex 1.4410, 1.4547 |
| Welding | EN ISO 3834-2, procedure qualification to EN ISO 15614-1 |
| Acceptance | EN 10204 3.2 with survey – to be notified before production starts |
| Export | Classification under the EU dual-use regulation and Austrian foreign trade law, clarified per enquiry |
Typical tasks
Seawater systems
Cooling, ballast and fire mains run in CuNi 90/10 or high alloy. Which grade holds up depends on chloride content, temperature and flow velocity – not on the pressure rating.
Engine room and propulsion systems
Exhaust headers, cooler bundles, fuel and lube oil lines: headers, coils and closing pieces to drawing, matched to the engine installed.
Components to drawing
Spools, headers, closing pieces and special flanges supplied ready to install, packed in erection sequence. In block assembly every weld not made on board is an hour gained.
Chain of evidence
Heat number, mill certificate and test report per item, tied to the order. The records travel with the goods, not weeks later.
Confidentiality and export
Drawings stay inside the project and go no further than procurement requires. Export classification is settled before we quote, not before we ship.
Defence and naval – frequently asked questions
Have you supplied naval projects before?
Not so far – we would rather say that up front than afterwards. What we can supply are the grades, standards and acceptance levels naval shipbuilding calls for; whether a specific item runs through us is something we check per enquiry against material, standard, acceptance and date.
What acceptance is usual in naval shipbuilding?
As a rule inspection certificate 3.2 to EN 10204, that is with survey and countersignature by a surveyor of the classification society. Note: acceptance must be notified before production – a certificate with a surveyor cannot be produced after the fact.
Why do shore flanges not fit on board?
Because shipbuilding has its own flange standards. DIN 86029 and DIN 86030 are slip-on flanges pushed over the pipe and welded, DIN 86041 is the welding neck flange for higher duty. Form and mating dimensions differ from EN 1092-1 – order the shore standard and you get parts that do not fit.
How long must the documentation stay available?
For the life of the ship, and for naval units that is regularly over thirty years. So it is filed per item: heat number, mill, certificate and test report, tied to the order. A blanket confirmation covering one delivery helps nobody twenty years later.
How do you handle confidentiality and export control?
Drawings and specifications are treated as confidential and passed on no further than procurement requires; we sign a non-disclosure agreement before the enquiry. Classification under the EU dual-use regulation and Austrian foreign trade law is settled before we quote.
Defence and naval supply
Tell us what it is about – plant, medium, temperature. We come back with a proposal, a price and a date.