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 Reporter March 2015 Digital Edition
FREE Maritime Reporter Subscription
Latest Maritime News    rss feeds

Technology

Austal Graduates 48 4-Yr Apprentices

Austal USA combined two classes to graduate a total of 48 members of Austal’s cutting-edge four-year apprenticeship program yesterday at a formal ceremony held at the Arthur R.

SimCity

Building Capacity, as Deadline for Trained Crews Nears   “You see that ship. That’s our ship,” says Karsten Saevik, as he directs our attention to the virtual

Maritime Training Five Years from Now: A Look Ahead

For anyone involved in maritime training, now is an incredibly exciting time full of opportunity. More than ever before, there are new advanced techniques and technologies

Offshore

JV Wins $2bln Freeport LNG Contract in US

A joint venture (JV) between CB&I, Chiyoda International and Zachry Industrial has won a contract worth over $2bn from FLNG Liquefaction 3 for a liquefied natural

Feds Delay LNG’s Port Ambrose Application

The US Coast Guard and the US Maritime Administration (MARAD) have temporarily suspended their review of the proposed Port Ambrose deep-water LNG import terminal.

Nations Convene for Arctic Maritime Discussion

Citing an increasing need to ensure safety, security and stewardship of Arctic waters, member countries of the Arctic Council gathered at U.S. Coast Guard Headquarters

Energy

Feds Delay LNG’s Port Ambrose Application

The US Coast Guard and the US Maritime Administration (MARAD) have temporarily suspended their review of the proposed Port Ambrose deep-water LNG import terminal.

Austal Graduates 48 4-Yr Apprentices

Austal USA combined two classes to graduate a total of 48 members of Austal’s cutting-edge four-year apprenticeship program yesterday at a formal ceremony held at the Arthur R.

Mexico Unveils National Strategy ahead of Paris Climate Talks

Mexico on Friday said it will cap its greenhouse gas emissions by 2026, becoming one of the first countries to formally submit its national climate plan the

LNG

JV Wins $2bln Freeport LNG Contract in US

A joint venture (JV) between CB&I, Chiyoda International and Zachry Industrial has won a contract worth over $2bn from FLNG Liquefaction 3 for a liquefied natural

Feds Delay LNG’s Port Ambrose Application

The US Coast Guard and the US Maritime Administration (MARAD) have temporarily suspended their review of the proposed Port Ambrose deep-water LNG import terminal.

GAIL Seeks 7 LNG Cargoes

GAIL (India) will buy seven liquefied natural gas (LNG) cargoes for delivery from October 2015 until December 2016, according to the tender document obtained by Reuters.

Vessels

Carnival Sails to Profit

The world's largest cruise company Miami-based Carnival Corp reported a net profit of $49 million, or 6 cents per share in the first quarter ended Feb. 28.   That

Smoke: Cruise Ship Evacuates Passengers

A number of passengers and crew members were evacuated after smoke was spotted billowing from the front section of Carnival Liberty cruise ship docked in the Dutch Caribbean nation of St Maarten.

First Supramax Vessel for Japan-Italy Venture

'DACC Tirreno' was delivered at the Oshima shipyard in Japan yesterday, the first of four Supramax bulk carriers for the dACC Maritime Limited fleet, the joint

 
 
Maritime Careers / Shipboard Positions Maritime Contracts Maritime Security Naval Architecture Navigation Offshore Oil Pod Propulsion Port Authority Ship Repair Shipbuilding / Vessel Construction
rss | archive | history | articles | privacy | terms and conditions | 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: 0.2213 sec (5 req/sec)