Cargo Handling Systems. for LPG, NH3 & Ethylene. Oil & Gas Systems

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1 Cargo Handling Systems for LPG, NH3 & Ethylene Oil & Gas Systems

2 Cargo handling systems for LPG, NH 3 & Ethylene Gas Carrier Technology Hamworthy s gas system know-how originates from its heritage with the Kværner group and Moss Shipyard, which pioneered LPG carrier shipbuilding in the early 1960 s. This vast experience in engineering cargo handling systems for LPG, NH 3, Ethylene and LNG is the foundation of our activities in this technology driven environment. Hamworthy s engineering team has gained important operational feedback from gas carrier operators and our engineering ideas have been continuously developed and applied. At sea there is no substitute for experience. gas, inert gas plants and nitrogen generator systems, deepwell and booster pumps. All equipment is designed and engineered in-house. We also complement packages with gas detection systems, valves, instrumentation and monitoring systems, and are pleased to offer support to shipbuilders and shipping companies worldwide. We can assist in almost any matter regarding gas carrier cargo handling, from feasibility studies through to complete design and fabrication, supervision of installation, commissioning and gas trials. Hamworthy is a leading supplier of not only gas carrier cargo handling technology but also design and manufacture of key cargo handling equipment. For LPG and Ethylene carriers we offer single source services including engineering of complete cargo handling systems, tank design and supply cargo handling equipment such as reliquefaction and cooling systems for liquid Hamworthy designs and supplies heaters and vaporisers for boil off gas, reliquefaction plants, inert gas generators and nitrogen generators for LNG carriers, as well as VOC recovery systems for shuttle tankers and terminals. 2

3 Reliquefaction plants Skid mounted units ready to be installed onboard The plants are delivered complete and tested, with all components; internal piping, valves, instrumentation and control devices. Plants can be operated locally or via a remote control by conventional instrumentation or through an integrated computer control system. A typical skid unit will include a section of the partition bulkhead between the compressor and the motor-room to simplify the installation and alignment. We supply reliquefaction plants based on direct condensation for LPG carriers and cascade systems for Ethylene carriers. The advantages achieved are lighter weight, better efficiency, expected lower life cycle cost and easy maintenance. The units are also equipped with pulsation dampers in the piping system to minimise vibration. The cascade systems for Ethylene and Ethane are designed for boiling point down to -104 C. Cargo compressors used are of the reciprocating oil-free type such as Burckhardt, suitable for various cargoes and pressures in multi-purpose gas carriers. The LPG systems are designed for cargoes with boiling point down to -50 C. Typical cargoes that can be handled are Propane, Propylene, Butane, Butadiene, Ammonia and VCM. With respect to cargo condensers, our standard of adopting plate type heat exchangers of fully welded plate type in Titanium is considered state-of-the-art for the industry. To meet the increasing environmental anti-pollution requirements, all plants are designed to prevent cargo vapour leakage. Cascade plants have screw compressors applied for the cooling circuit with application of non-cfc refrigerants. The experience of using Propane for this purpose is good and Hamworthy has converted many systems from R22 to Propane. Reliquefaction unit with plate type condenser in titanium and pulsation dampers 3

4 Cargo cooling plants for cooling of LPG, hydrocarbons or chemicals Cooling plants are designed and manufactured by Hamworthy to suit individual customer needs. For LPG we have references both for VCM cooling and for LPG FSOs and FPSOs for cooling of gas. The plants are delivered as skid mounted units either for installation and operation in deck housing or on open deck in EX-zone. Cooling plant onboard Sanha LPG FPSO Installing this type of plant on a gas carrier can improve the loading rate when loading hot cargoes. On FSOs and FPSOs the plant is cooling hot gas from the upstream process plant before it is expanded into the cargo tanks. Propane is the preferred refrigerant for the cooling plants. Compressors will typically be of the screw type. Cooling plant for the Escravos LPG FSO Loading of LPG on Escravos LPG FSO 4

5 Heat exchangers Heat exchangers are manufactured in accordance with Hamworthy s design and are applied to various duties including condensers, heaters, vaporisers and intermediate coolers. Shell and tube type heat exchangers for heating of LPG cargo are delivered with high Nickel alloy stainless steel or Titanium tube-stacks. For cargo heating applications seawater is typically circulated on the shell side to prevent freezing and tube cracking, avoiding cargo leakage. Combined LPG Cargo Heater and Vaporizer with Titanium tubes 5

6 Gas systems for LPG-FSOs / FPSOs and Offshore Applications Hamworthy has delivery references for purpose built LPG-FSOs and FPSOs where we have designed, manufactured and supplied LPG cooling plants, reliquefaction plants, inert gas generators, nitrogen generators and cargo pumps. Sanha LPG FPSO Both LPG-FSO and FPSO new-build barges and conversions of VLGCs have been equipped with cargo handling systems from Hamworthy. The systems have been designed according to the applicable rules for the actual project, ie from offshore rules to standard ship rules. Reliquefaction plant onboard Sanha LPG FPSO 6

7 Professional project management Assistance will be given to ensure complete project management of the installation from conception through to operation and through-life support. General arrangement Outline specification Tank design Systems engineering Arrangement drawings P & I diagrams Installation drawings Equipment supply Installation supervision Commissioning/IMO certification assistance Gas trial assistance Instruction manual Troubleshooting Spares & maintenance Complementary systems for gas carriers Hamworthy supply other systems for gas carriers including Moss nitrogen generators, Moss inert gas generators and Svanehøj deepwell cargo pumps. All these systems can be supplied as part of our total equipment package. For more information on these products please visit our website at: 7

8 Hamworthy Oil & Gas Systems AS PO Box 144 NO-1371, Asker Norway NORWEGIAN ACCREDITATION MSYS 002 ISO 9001/ISO 14001/OHSAS CERTIFIED COMPANY tel: fax: web: A subsidiary of Hamworthy plc The manufacturers reserve the right to alter the specification and data to incorporate improvements in design. Certified drawings will be issued on request. All details copyright Hamworthy plc. ref: HGS /4