LNG Crane Pipe Features:
Due to extreme low temperatures, higher material selection and welding requirements are necessary.
Due to extreme low temperatures, the sealing performance of the sealing rings varies greatly.
Due to extreme low temperatures, the application of grease for general rotating joints is nearly impossible; therefore, a nitrogen lubrication system for rotating joints should be designed.
Serial Number Project Content Requirements Serial Number Project Content Requirements 1 Model AL 2543 19 Loading end connection DN50/HG20592-2009 PN25 RF 2 Processed Medium LNG 20 Gas phase connection DN50HG20592-2009 PN25 RF 3 Liquid Phase Diameter DN80-50 21 Emission interface connection Yes 4 Vapor Phase Diameter DN80-50 22 Nitrogen Blow-Out System 3/4 inch, 1 inch 5 Operating Pressure 0. 5Mpa 23 Low-temperature isolation valve 2 "One ball valve, one liquid phase arm, and one vapor phase arm" 6 Design Pressure Liquid：1.6MPa 24 Inner arm SS304L 7 Operating Temperature -196 - 65°C 25 Outer Arm SS304L 8 Design Temperature -196/65 degrees Celsius 26 Pole CS 9 Viscosity 0.1336CP 27 Connector/Swivel Connector SS304L 10 Density 447.8(liquid) Kg/m3 28 Balancing Unit CS 11 Traffic Loading: 80 (liquid) m³/h 29 O-ring PTFE 12 Earthquake load 0.2 G 30 Gasket Metallic Gasket / PTFE 13 Permit pressure drop 0.03MPa 31 Low Temperature Isolation Ball Valve Yes 14 Gas Recovery Yes 32 Emission Connection Yes 15 Operation Manual 33 Portable Elbow Fitting Yes 16 Inner Arm Measurement DN80 34 Nitrogen purge system yes 17 Outer Arm Size DN80-50 35 Basic Bolt Yes 18 Balancing Type Spring 36 Parking Locking Device Yes Main Process of LNG Crane Pipe (Illustrated with Photos)
Main Process of Swivel Fitting
Forged Parts - Solution Treatment - Blanking - Assembly of the inner and outer rings of the bore - Welding of the inner and outer rings - Deep cryogenic treatment in liquid nitrogen tank - Precision CNC machining - Precision lapping of the sealing surfaces - Assembly into the main body of the rotating joint
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