Key applications for LNG cryogenic valves

( 1) Land-based LNG Marine platform, LNG floating platform, LNG plant, LNG receiving station

LNG cryogenic Industrial Valves is mainly used in - 162 ℃ LNG liquefaction system, mainly including LNG Marine platform, LNG floating platform ( FLNG） , land-based LNG liquefaction plant, all kinds of LNG receiving station or LNG vaporizing station, etc. Large LNG receiving station is shown in figure 1 2.

figure 1 - 2 large LNG receiving station

( 2) LNG liquefaction process system

MCHE mixed refrigerant LNG liquefaction system, for example, As shown in figure 1 3) , LNG liquefaction unit including LNG cryogenic flow spiral wound tube heat exchanger, NG multistage compressor, level 4 throttle, gas-liquid separator, etc. Mixed refrigerants including methane, ethane, propane, butane, isobutane, nitrogen, etc. , through the throttling refrigeration, step by step grading after cooling, heat will be NG liquefaction for LNG. LNG cryogenic valve is mainly used in unit, LNG receiving unit and LNG transport waybill yuan, etc. Cryogenic throttle valve is mainly used in throttling refrigeration process of mixed refrigerants. In between - throttling refrigeration temperature 40 ~ - Between 164 ℃.

figure 1 - Type 3 MCHE LNG liquefaction process system

( 3) The difference between traditional LNG cryogenic valves and special valves

LNG cryogenic valve is mainly used in - Field of 162 ℃, the main control of flammable and explosive type LNG fluid. Because of LNG in transport process in a saturated state, generally stored in LNG storage tank opening type, has been in a state of evaporation, so in the transport process is always in a state of gas liquid two phase flow. In a closed system easy to critical, cause safety accidents. LNG cryogenic valves with the traditional valve used in structure, material, design theory, method of manufacture and testing, etc, have bigger difference. LNG valve and the main difference between the traditional high temperature valve as shown in figure 1 4.

figure 1 - 4 LNG valve and traditional high temperature valve is the main difference between

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