L.O.O.P and Raychem Shrink Sleeves
(this is taken from a Raychem WrapUp newsletter - and is a past Case Study of a project utilizing Raychem shrink sleeves)
The Louisiana Offshore Oil Port, known as the L.O.O.P, consists of a number of pipelines that will connect offshore loading facilities with onshore storage units. It will be the first facility in the United States built specifically for unloading ultra large crude carriers.
The LOOP is also a first for Raychem. It represents the first major installation of WPC in the US with a total of 15,000+ sleeves, in diameters ranging from two to fifty-six inches being used.
The LOOP will consist of three constructions. The offshore platform complex will consist of a control platform and a dumping platform. The lower deck of the pumping platform will house crude oil pumps that have a 45,000 to 100,000 barrel per hour pumping capacity. Raychem's WPC will protect the joints on the platforms riser pipe.
Each single point mooring station will be connected to the pumping platform by 56" diameter pipe lines, approximately 8,000 feet in length. A 48" line will extend twenty one miles from the pumping platform to the Flurchon booster station. The Flurchon station will be located about 2.5 miles inland on the south side of the Louisiana Highway 1, near Bayou Moreau.
Next, a 21 mile, 4" diameter line will be laid from the Flurchon station to the platform complex for transporting diesel fuel for the gas turbine generators installed on the platform.
Corrosion protection for all the large submarine lines will consist of an asphalt sand mixture (heavycoat) or a semi plasticized coal tar enamel with fiberglass reinforcing and felt wrap. The small diameter line will be coated with epoxy. All weld joints will be protected with Raychem WPC or TPS products. Raychem ALWS/WPC will be used to protect anode wire connections to the pipe. Also, the WPC product will be provided in special cut lengths to accommodate the cutback of cement coating on the offshore pipe.
Two methods will be used to install onshore pipe. At the push station sites, consisting of lay barges or prepared land sites, the push ditch method will be used. Here, the pipe will be welded, inspected, coated, floated and then pushed into the ditch. With the dry land method, standard ditching and backfilling will be used where the environment allows.
The buried lines will be yard coated with an asphalt sand mixture approximately 5/8 inch thick. In addition, the line will be concrete coated to provide a specific gravity of 1.04.
A 30" diameter, 29 mile long brine disposal line will be installed from the storage facility to the Gulf of Mexico. This line will extend 2 miles into the gulf to discharge brine from the cavity leaching.
All joints on the onshore portion will be protected with specially cut Raychem WPC to accommodate the cement coating cutbacks.
The L.O.O.P. is another challenge that Raychem is proud to be able to meet.