MARINE TERMINAL WITH CONVENTIONAL BUOY MOORING AND SUBSEA PIPELINES
PCI INGENIEROS CONSULTORES, S.A./ ALBANISA
MIRAMAR - NICARAGUA
The project comprised Conceptual, Basic and Detail Engineering for Miramar Fuel Distribution Plant offshore Miramar Spa, Nagarote Municipality, Leon Department, Republic of Nicaragua.
The defined Design Fleet included the maximum and minimum ship sizes to access the terminal: 73,700 DWT B/T Sandino tanker as the maximum and 10,000 DWT LPG tanker as the minimum.
The defined pipeline system comprised a set of five (5) subsea pipelines for LPG, Jet A-1, Gasoline, Diesel and Fuel Oil, with the assigned line sizes 8″, 12″, 16 “, 20″ and 26” respectively.
The developed Conventional Mooring Buoy System is based on appropriate ship orientation.
The Conceptual stage of the project covered the following activities:
Guidelines and parameters to proportion and locate all the marine facilities of the Plant.
Description of site conditions for the CBM berth; justification of the selected subsea pipeline route; assessment matrix analysis of CBM alternatives involving hose connections.
Definition of range, capacity and size of tankers capable of berthing and unloading required fuels, according to the terminal operating conditions; definition of the maximum and minimum tanker sizes to proportion and design the port facility.
Analysis for preliminary sizing of pipelines and hoses to receive and transfer products from the berth to the Plant.
Procedure for diver-assistant survey of the proposed subsea pipelines corridor.
The following activities were carried out at the Basic stage of the project:
Definition of the terminal’s Operation Philosophy.
Assessment of construction methods for the Marine Facilities.
Calculations for subsea pipeline installation, mooring buoys, anchors and anchor chains, environmental and mooring loads, hydraulics.
Description of the terminal’s Processes and Operation.
Assessment of Fuel Oil unloading: route for new pipelines, velocities and pressure drop of each product, confirmation of pipeline and hose sizes preselected at the conceptual stage; hydraulic analysis for the fuel oil transfer system from tankers to storage facilities.
Specifications of pipes, valves and fittings
The Detail Engineering stage of the project comprised the following activities:
Cathodic Protection System, designed for 15 year life.
Pipeline flexibility analysis, calculation of deformations and stresses in the subsea pipelines under the design conditions, fulfilling the ASME B31.4 and B31.8 guidelines and technical requirements.
Specifications of mooring buoys, anchor chains, hoses and beaconing.
Structural calculations for ground pipe supports and subsea PLEM framing.
Description of construction procedures for the subsea pipelines’ installation; list of main construction activities.
SCOPE OF WORK
Basic and Detail Engineering