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Production method of Lng vaporization dexterity heat transfer tube and lng vaporization dexterity heat transfer tube
Production method of Lng vaporization dexterity heat transfer tube and lng vaporization dexterity heat transfer tube
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机译:Lng汽化灵巧传热管的生产方法及Lng汽化灵巧传热管
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摘要
PROBLEM TO BE SOLVED: To provide a process of manufacture of heat exchanger tube for LNG vaporizer and a heat exchanger tube for LNG vaporizer superior in peeling resistance in a sacrificial anode coating layer even in the case that a flow speed of dropped sea water is increased and a continuous long hour operation is carried out.SOLUTION: This invention relates to a process of manufacture of an open-rack type heat exchanger tube for LNG vaporizer with surface roughness of an interface between a base material 2 and a sacrificial anode coating layer 3 of Al alloy heat exchanger tube 1 being an average roughness Ra: 5 to 50 μm, maximum valley depth Rv: 30 to 400 μm characterized in that at least one grain size of grain size Nos.14 to 24 is selected, blast powder further adjusted to cause a configuration rate more than 1000 μm of grain diameter in the selected grain size to be 80% or higher is applied to cause the outer surface of the base material 2 of the heat exchanger tube 1 to be blasted.
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