Bonatti chooses EFD Induction post-weld solution for record-breaking pipeline

Oil and gas contractor Bonatti has selected an EFD Induction post-weld heat treatment (PWHT) solution to help build the world’s longest 13% Cr onshore pipeline. The corrosionresistant pipeline is part of the In Salah Southern Fields project (ISSF) in the Algerian Sahara desert.

This in turn is phase two of the larger In Salah Gas (ISG) project, which first came on-stream in July 2004. ISG—a joint venture between Statoil, BP and Sonatrach—is Algeria’s third largest gas development, and currently has an annual production capacity of around 9 billion cubic meters.

 

A proven solution in a tough environment—an EFD Induction PWHT unit in use on advanced, corrosion-resistant alloy pipe in the Sahara desert. Daytime summer temperatures can reach 60°C, but plunge to below freezing at night. The dry gas harvested in the southern In Salah fields is unusually corrosive due to its high CO2 content, which can be as high as 10%.

   

“This is a significant project for several reasons,” says Stefano Migliavacca of EFD Induction in Italy. “To be selected by such a prestigious company as Bonatti confirms our ability to satisfy the most stringent criteria. The project also underscores the industry-wide acceptance of our PWHT solution for corrosion resistant alloys.”

The Bonatti order involves two complete PWHT systems for on-site operation in the Saharan desert. Each system is truck-mounted, and comprises an EFD Induction ‘Minac’ 70/110 power source, specially designed induction coils for 8”-12” and 16” pipe, and chiller and quench units.

 

The two PWHT systems will be used for butt-to-butt welding of 13% Cr and 13% Cr to duplex steel. “Welding these heterogeneous materials is a technically advanced task,” says Migliavacca. “But when used in conjunction with PWHT, such welding offers tremendous benefits. 13% Cr pipe, for example is extremely cost-effective because its strength means that lighter wall thicknesses can be used. Duplex on the other hand is extremely resistant to corrosion.”

PWHT of 13% CR and duplex flowlines is necessary in order to minimize the risk of hydrogen induced stress cracking (HISC). Such cracking is caused by the presence of hydrogen in the pipe’s heat affected zone.

Although precautions are taken during the fabrication and welding stages to minimize hydrogen content, PWHT is still deemed the best way to achieve
safe levels.

“A big factor behind Bonatti’s decision is our proven experience in this specialized PWHT area,” adds Migliavacca. “Our colleagues at EFD Induction in the UK, Jon Philpott in particular, had previously devised a PWHT solution for another In Salah contractor.

It involved the supply of three truck-mounted PWHT units, which have now been operating in the tough Algerian environment for months. Philpott’s expertise contributed greatly to the Bonatti solution, and helped convince them that EFD Induction was the right partner.”

The PWHT units built for Bonatti are currently undergoing final testing. “We hope to get the units into action as soon as possible,” says Migliavacca. “ISG is after all a critical project. Its seven fields not only supply key foreign and local markets with gas, it also involves the world’s first full-scale carbon dioxide capture undertaking at a gas field. It’s an honor to be part of such an exciting and meaningful initiative.”


About EFD Induction
EFD Induction has to date installed thousands of heating solutions for a wide range of industrial applications—bringing the benefits of induction technology to many of the world’s leading manufacturing and service companies.

EFD Induction has manufacturing plants, workshops and service centers in the Americas, Europe and Asia. Corporate headquarters are in Skien, Norway. www.efd-induction.com

About Bonatti
Bonatti is a major contractor that specializes in engineering, proceurement and construction projects for the oil, gas and power industries worldwide. www.bonatti.it

 

Associated companies:


Related news

Latest news

UiB and CMR in high-tech collaboration

Students from UiB last month joined an experiment with an ultra-high-speed camera. This was a part of the troubleshooting of the Field Kelvin Probe currently under development.

Hatteland Display at International Workboat Show 2016

Hatteland Display are highlighting its diverse portfolio of maritime displays and panel computers on its booth (#1658) at the International Workboat Show 2016 (IWBS 2016) this week.

Servogear Announces Upcoming Events

Servogear announces a busy end of November, beginning of December. They will be participating at important international exhibitions.

Teamtec and ANDRITZ Cooperation

ANDRITZ and TeamTec have signed a cooperation agreement for worldwide marketing of the SeaSOx exhaust gas cleaning system for the maritime industry. 

Export Credit Norway looking for Norway's Best Exporter

Export Credit Norway  has now opened the nomination process for the 2017 Export Award, searching the Norwegian exporter of the year. 

Global Economic Outlook

7 December, Oslo Chamber of Commerce invites to a session with insightful updates on the Norwegian and international economy.

Rebuilding for Hydrogen

M/Y “Che Guevara”, previously owned by Gaddafi, will be converted to run on hydrogen. Greenstat will lead the project and are seeking partners.

Scana training at Servogear

In week 43-45 Servogear  had the pleasure of having Mr. Sun Xiaojia and Mr. Tzuu Kin Tan from Scana staying in the Servogear hometown of Rubbestadneset.

Quality and Customer Satisfaction

Cost efficiency is important. But we can’t rely on cost-cutting alone. At Beerenberg we have asked ourselves the following question: What does it take for the market to continue to choose providers such as Beerenberg in th...