World's Longest Offshore LNG Pipe – Divers Ready

Stavanger Aftenblad
Friday, June 01, 2012
Skandi Arctic: Photo credit DOF Subsea

‘Skandi Arctic’ is preparing to weld together the largest export gas pipe on the seabed ever built

The gigantic Nord Stream pipe, with two same-sized parallel ones, runs from Vyborg in Russia through the Gulf of Finland and the Baltic Sea to Lumina in Germany.
It will be able to secure supplies of electricity and heat to 26 million households in Europe for 50 years to come. The 1,224 kilometre-long pipe (approximately 760 miles) is currently located on the bottom in three lengths. Norwegian subsea expertise will be called upon to weld together the lengths of pipe on the seabed.

The gas pipes’ diameters are 48 inches, thus making it larger than any other one placed on the seabed to date.

Lifting the gigantic pipe sections with precision, which will be precisely cut and welded together with only a few millimetres clearance for the welding skate, requires heavy special equipment, which is currently stored and maintained at Statoil’s Pipeline Repair System (PRS) base in Haugesund. From there, a considerable amount of equipment, some of it heavy, for the welding job at depths of 80 and 110 metres (about 260 and 360 feet), will be loaded onto the ‘Skandi Arctic’.

The divers, who will work from within different pressure chambers in three to four weeks at a time, will have to descend onto the seabed to prepare the equipment for the welding operation.
They will also be required to stay down there in the deep whilst the remote-controlled welding machine carries out its 360-degree job around the circumference of the pipe.

With almost 400 tons of equipment and 140 people on board, the ‘Skandi Arctic’ will set sail from Haugesund for the Baltic Sea. This is the first ship in a new generation of diving vessels where monitoring of all life support systems for divers in the chamber or in the deep is managed and monitored by computers.

On the seabed, a diver will be able to install a small workshop tightly connected to the welding skate between the lengths of pipes. Seawater will then be pressed out so that divers can work in ordinary working clothes without a diving suit. Welding will also take place on dry pipes.

The entire job is expected to last for almost two months.

 

Maritime Today


The Maritime Industry's original and most viewed E-News Service

Maritime Reporter July 2016 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Technology

Insights: Kunkel Weighs in on Propulsion Technology

LNG? Methanol as fuel? Hybrid systems? Tier 4? Reducing noise? Cutting emissions without crushing fuel economy? Marine News readers have questions and Bob Kunkel has answers.

A Sea Change in Waterjet Technology

Longtime waterjet propulsion equipment provider NAMJet introduces key advancements for the workboat sector. Back in 2011, when boat builder Birdon went looking

ATB Design Comes of Age

The emerging trend of marrying the design of an articulated tug and barge (ATB) to a particular propulsion system to maximize efficiencies of that system has, of late,

Offshore

Swiber Applies for Judicial Management Instead of Liquidation

Singapore oilfield services company Swiber Holdings Ltd said on Friday it has applied to place itself under judicial management instead of liquidation.   Swiber

US Oil Drillers Add Rigs for 5th Week in a Row

U.S. drillers this week added oil rigs for a fifth consecutive week, Baker Hughes Inc said on Friday, but the oilfield services provider and some analysts cast

Det Norske to Restore Production at Alvheim after Leak

Norwegian oil firm Det norske said it expected to reach full production at its Alvheim FPSO (floating storage, offloading and producing unit) overnight after a leak,

Energy

China Refineries Enters Global Oil Trade

During the last year, China’s “teapot” refiners are helping to boost China’s crude import demand and their influence is expanding, says Clarkson Research Services.

First US LNG Shipment Goes to China

The first liquefied natural gas vessel from the lower 48 U.S. states is on its way to China, according to a Reuters interactive map on Friday, the latest sign that

Swiber Applies for Judicial Management Instead of Liquidation

Singapore oilfield services company Swiber Holdings Ltd said on Friday it has applied to place itself under judicial management instead of liquidation.   Swiber

LNG

First US LNG Shipment Goes to China

The first liquefied natural gas vessel from the lower 48 U.S. states is on its way to China, according to a Reuters interactive map on Friday, the latest sign that

LNG Market Needs More Vessels than Currently on Order

Despite the current weakness in LNG shipping rates, Drewry maintains its bullish long-term outlook for LNG shipping and believes that the market will require more

Insights: Kunkel Weighs in on Propulsion Technology

LNG? Methanol as fuel? Hybrid systems? Tier 4? Reducing noise? Cutting emissions without crushing fuel economy? Marine News readers have questions and Bob Kunkel has answers.

Vessels

Horizon Delivers Towboat Marty Cullinan for FMT

In June 2016 Horizon Shipbuilding, Inc. of Bayou La Batre, Ala. delivered the M/V Marty Cullinan, a 120’ towboat with a retractable pilot house, to its home port of New Orleans, La.

New Dredger for North Carolina’s Coastal Waterways

The North Carolina Department of Transportation recently took delivery of a new, fully customized cutter suction dredge, which it christened the Dredge Manteo in a ceremony held April 28,

New 'Mega Passenger Ship' for Star Cruises

Elomatic Ltd and Deltamarin Ltd have signed a tri-party engineering contract with shipbuilder MV Werften for the design of Star Cruises’ new Global Class “mega passenger ship,

 
 
Maritime Standards Naval Architecture Navigation Offshore Oil Pipelines Pod Propulsion Port Authority Ship Repair Shipbuilding / Vessel Construction Sonar
rss | archive | history | articles | privacy | contributors | top maritime news | about us | copyright | maritime magazines
maritime security news | shipbuilding news | maritime industry | shipping news | maritime reporting | workboats news | ship design | maritime business

Time taken: 0.0974 sec (10 req/sec)