Marine approvals for 24° tube connectors

(Werdohl, November 2015)

Marine approvals for 24° tube connectors 

Lloyds Register and Bureau Veritas certify Stauff connector systems

Shipbuilding and offshore engineering are particularly demanding areas of application for hydraulic systems, and certification by the relevant societies is essential when it comes to using components such as tube connectors.

For this reason, Stauff has had its range of 24° cutting ring, sealing cone and welding cone tube connectors from the Stauff Connect series tested by two more leading international classification societies. As a result, both societies – Lloyds Register and Bureau Veritas (BV) – have issued the appropriate certification.

In both cases, the certificates apply to the entire range of Extra Light (LL), Light (L) and Heavy (S) series, which are available for outer tube diameters of 4 to 42 mm and were developed for maximum pressures of 100 to 800 bar, depending on series and diameter. The temperature range that the connectors have been certified for depends on the seal material used. When using seals made from FPM/FKM (Viton), for example, media temperatures of up to +200° Celsius are permitted.

The certifications permit the use of 24° tube connectors in hydraulic systems in shipbuilding and offshore engineering. The great benefit of this: the high-quality zinc/nickel coating of these components offer standard steel corrosion protection that exceeds previous market standards. Over 1,200 hours resistance to red rust and base metal corrosion were achieved in the salt spray test in line with EN ISO 9227. This clearly exceeds the highest corrosion protection class K5 as defined by the VDMA in standards sheet 24576. For users in the shipping and offshore industry, this type of corrosion protection also offers the advantage of remaining effective even after possible mechanical damage to the fitting, which can never be excluded in the rough shipping and port environment. If the surface is damaged, only the top layers of sealing and passivation might be removed, but not the zinc/nickel layer underneath which guarantees the actual corrosion protection. The coating is also highly ductile which makes it less susceptible to damage. 

For users in other areas of application involving hydraulic systems, these approvals document the high quality and the high safety level of the connecting elements, even in adverse ambient conditions: extensive programmes of testing involving leak tests, burst pressure tests, alternating pressure tests and vibration tests are essential requirements for certification. 

The 24° tube connectors from Stauff, whose construction is defined in accordance with ISO 8434-1 and DIN 2353, are used worldwide. Numerous straight, angled, T-shaped and cross-shaped variants used as connectors or reducing fittings, with common screw-in/screw-on threads or with welded-on or pipe glands cover all conceivable requirements and allow easy designing of extensive and complex pipeline systems.


Image 1:

Marine certification times two: the Stauff Connect range has been approved by both Lloyds Register and Bureau Veritas for use in shipbuilding and offshore engineering (Courtesy of Walter Stauffenberg GmbH & Co. KG)

Download image (JPG, 900x806px)

Background Information

Walter Stauffenberg GmbH & Co. KG was founded in the 1950s in Werdohl, in the German province of North Rhine-Westphalia, and was initially a contract turning shop. Today the company operates under the trade name STAUFF, developing, producing and marketing fluid technology components for use in plant construction and mechanical engineering. In the fields of tube, pipe and hose clamps, measuring technology and hydraulic filtration, STAUFF is one of the world’s leading organisations in a growing industrial segment. 

Meanwhile, more than 1100 employees (12/2014) in 18 companies generate an annual turnover of more than EUR 200 million (12/2014) worldwide. Additional distribution subsidiaries have recently been opened in Malaysia, Vietnam and Thailand. Besides the group headquarters in Werdohl Ehrenfeld, the company has production and logistics facilities in the German cities of Plettenberg-Ohle and Neuenrade-Küntrop.

Press Contact

Mr Boris Mette
Head of Marketing Communications
Tel.: +49 (0) 2392 / 916-154
Fax: +49 (0) 2392 / 916-270154

(copy 2)

Back to overview