STATS Completes North Sea Platform Platform

press release
Wednesday, January 04, 2012
North Everest Pipe Layout

Pipeline engineering experts, STATS Group, has completed an isolation project on behalf of AMEC to allow maintenance and replacement works on the North Everest platform in the central North Sea.

 

The workscope covered three maintenance valves and one ESD valve on a 20-inch gas import line onboard the BG-operated platform. After a detailed site survey and piggability study, STATS decided the best solution was to use a tethered Tecno Plug pushed by stem bar to location from a temporary launcher.  As the pipeline had no pigging history, this method was considered as the least risk laden option rather than pigging a remotely operated plug from the pig trap.

 

This alternative method was proposed based on detailed analysis during the Front End Engineering Design (FEED) process, including the piggability study which revealed potential issues for the route of the pigging run which could have prevented the Tecno Plug™ from reaching the desired set location. The FEED process included generation of a project design premise, pipe stress analysis, piggability study, FMECA, operational procedure and risk assessment. This package identifies and mitigates operational risk and reassures clients by providing detailed analysis of the internal conditions and geometry of the pipeline prior to carrying out the isolation.

 

Prior to carrying out the isolation the pipeline pressure was reduced to 6 barg, with the ESD closed and sealant injected, the maintenance valve was then closed to provided  temporary pipeline isolation. This allowed the temporary launcher to be installed inboard of the ESD valve and a team of STATS technicians to break out the piping.  A weld repair scope was also required and the STATS team removed the first 90o bend with clam shell cutting tools.

 

STATS also provided gas bags to act as a vapour barrier while a new 1500# flange was welded into the line. The new flange was then pressure tested using a STATS Flanged Weld Test Tool before reinstating the new bend and launcher valves. With the temporary launcher now in place and fully pressure tested, the valves were opened and the Tecno Plug™ was deployed into position outboard of the valves and hydraulically set to provide pipeline isolation.

 

Once set and monitored the stem bar was disconnected and the valves were replaced. As the pipeline pressure was only 6 barg, the Tecno Plug™ was installed in the reverse direction, providing full isolation while also providing a test boundary to pressure test the integrity of the reinstalled valves.

 

A full pressure test at 208 Barg was then conducted between the temporary launcher and the Tecno Plug™ before the plug was unset and recovered back into the launcher. The valves were then closed and temporary launcher removed allowing the pipeline to be reinstalled and returned to operation.
 

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

People & Company News

Marad Visits TX Maritime Technology & Training Center

United States Maritime Administration tours Maritime Technology and Training Center site.   Administrators from the United States Maritime Administration (MARAD),

ISS Announces CEO Transition

Captain Claus Hyldager yesterday decided to step down as the Chief Executive Officer of Inchcape Shipping Services (“ISS”).    The current Chief Financial Officer,

CME Lifts Force Majeure for all Illinois River Grain Terminals

CME Group has lifted its declaration of force majeure at all Illinois River terminals that are regular for Chicago Board of Trade corn and soybean futures delivery,

Technology

Marad Visits TX Maritime Technology & Training Center

United States Maritime Administration tours Maritime Technology and Training Center site.   Administrators from the United States Maritime Administration (MARAD),

Bergeron to be Keynote Speaker at SHIPPINGInsight

Scott Bergeron, CEO of the Liberian International Ship & Corporate Registry (LISCR), has agreed to serve as a keynote speaker at the SHIPPINGInsight 2015 Fleet Optimization Conference & Exhibition,

Tanker Retrofitted with Dual Fuel Engine

Caterpillar Marine informs it has begin a dual fuel engine retrofit conversion onboard the 472-foot Fure West tanker, owned by Furetank Rederi A/B. The MaK M 43

Offshore

CWind Joins National Workboat Association

Citing crew transfer services as an integral part of its offering, offshore wind industry service provider CWind announced it is now a member of the National Workboat Association (NWA) of the U.

BG Group Starts up Sixth FPSO in the Santos Basin

BG Group announced first oil from the Cidade de Itaguaí floating, production, storage and offloading (FPSO) vessel, the sixth unit to start production across the

BG Awards Fugro MBES, Seabed Coring Contract

Fugro has been awarded a contract by BG International Limited Sucursal Honduras to conduct an integrated multibeam echosounder (MBES) survey and seabed coring campaign

Energy

S.Africa Considering Ship-Based Power Generation

South Africa could deploy power barges using gas to generate electricity to help overcome chronic supply shortages, a senior government official said on Tuesday.

Asian Nations Call for Stop to South China Sea Land Work

Calls grow for China to halt land reclamation. Southeast Asian countries on Tuesday backed a U.S. call to halt land reclamation in the South China Sea, underlining

Koole Expands Rotterdam Operations

Koole Terminals has begun operations at the storage facility for petrol and diesel in Pernis that it recently acquired from BP.   The companies have a long-standing relationship.

 
 
Maritime Contracts Naval Architecture Navigation Pipelines Port Authority Salvage Ship Electronics Ship Repair Ship Simulators Shipbuilding / Vessel Construction
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: 0.1892 sec (5 req/sec)