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NobelClad welded pipe obtains DNV qualification

Published by , Assistant Editor
World Pipelines,

NobelClad has received a key industry certification for its explosion welded metal plates for use in longitudinally welded clad pipe. The certification, which was awarded last month by DNV GL, qualifies NobelClad's explosion welded clad plates under all DNV-OS-F101 2013 requirements.

The qualification of NobelClad's plates allows offshore pipeline engineers to incorporate technology and materials superior to roll bond plates.

Markus Bockelmann, NobelClad's Business Development Manager for the pipe market, commented: “With the [DNV GL] certification of compliance, engineers are no longer tied to the limits set by other cladding technologies for clad pipe.

“Engineers who would have otherwise settled for roll bond no longer have to compromise on bond strength, mechanical properties or the hydrogen induced cracking (HIC) resistance of the backing steel,” Bockelmann added.

The high bond strength of explosion clad allows engineers to specify its use in the production of tees and manifolds, as well as tight bends, without concern of clad disbonding. The cold welding process employed by NobelClad maintains the thermo-mechanical controlled process microstructure of the backing plate that can be optimised for fracture arrest or any other desired property. By retaining the superior properties of the steel backing layer, no compromise is required to obtain low temperature drop weight tear testing values, which is unavailable from roll bonded clad. Plates for clad pipe can be made up to 4.6 m wide and 13 m long, with a thickness from 12.5 mm to well over 75 mm.

NobelClad's plates are used to manufacture a broad spectrum of industrial processing equipment, including longitudinally clad line pipe for the oil and gas production and processing industry. Clad pipe is used for flow lines, risers, jumpers, slug catchers and other applications between wells and production facilities. Hydrocarbons often contain highly corrosive constituents that necessitate alloy pipes for transfer and processing applications. Clad metal offers an economical solution to solid alloy. With the DNV GL certification, customers can be assured that NobelClad's plates will meet the highly demanding requirements for offshore pipeline systems.

NobelClad is now certified to the DNV GL offshore standard and is qualified to meet all of the requirements of API 5LM.

Bockelmann added: “By leveraging our global operations, NobelClad is the worldwide leader in providing cost-effective clad metals that meet the specifications and production challenges of our customers. Our focus is to continually work with clad pipe manufacturers, engineering firms and end users to inform and develop complex solutions for future projects."

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