Unique Design Avoids Crevice Corrosion

Unique Design Avoids Crevice Corrosion

(Werdohl, January 2012)

Unique Design Avoids Crevice Corrosion

Process pipe work is extremely susceptible to crevice corrosion at pipe supports resulting in replacement of entire sections. Failures can potentially have catastrophic results.

The Stauff ACT Clamp is an innovatively designed solution for the installation of pipework where anti corrosion properties are paramount, e.g. in the field of offshore oil and gas exploration. Its design, based on the tried and tested Stauff Clamp according to DIN 3015, offers installation time reduction and long term cost savings due to extended service intervals.

The Stauff ACT clamp body design is currently available for sizes 1A, 2 and 3 of the Standard Series.

Throughout its development, Stauff ACT Clamps have been subject to stringent testing at the company’s in-house facilities in Werdohl, Germany. In order to ensure credibility of the product, the development process also involved independent testing. To achieve this, the services of Centre for Corrosion Technology of  Sheffield Hallam University, have been utilized. In a controlled laboratory environment, a salt spray test has been applied to various clamp configurations holding AISI 316 stainless steel tubing. Independent field test samples, based on a rig in the Dutch sector of the North Sea, have also been assessed at the Sheffield Hallam University facility. Both independent tests have recorded positive results in favour of the attributes of the new clamp.

Stauff ACT Clamps are made of flame-retardant plastic material (V0 listed in compliance with UL94) and have been designed in compliance with Norwegian offshore standard NORSOK Z-CR-010. They are available for the most common Metric and Imperial pipe diameters from 6 mm to 25,4 mm (1/4 inch to 1 inch).

The geometrically designed rubber strips are in direct contact with the pipe. They avoid crevice corrosion formed under the clamp body by formation of drainage channels to aid dispersal of water.

Stauff ACT Clamps can be used both in top-side and sub-sea environments.

Picture selection

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Picture 1:

Stauff ACT Clamp of the Standard Series according to German Industry Standard DIN 3015 (with highlighted rubber strips)

(Picture: Walter Stauffenberg GmbH & Co. KG, 201)

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 1200 employees (12/2011) in 16 companies generate an annual turnover of more than EUR 180 million (12/2011) worldwide. Additional distribution subsidiaries have recently been opened in Russia, Ireland and Malaysia. Besides the group headquarters in Werdohl Ehrenfeld, the company has production and logistics facilities in the German cities of Plettenberg-Ohle and Neuenrade-Küntrop.