Temperature transmitter measuring element installation shall meet the following requirements

1, measurement point should be located in sensitive and accurately reflect the position of medium temperature, should not be located in the medium flows not blind Angle. 2, when installed on the straight pipe, can be vertical or tilting (5 - Inserted into the pipe, elbow, or pour Yu Lin 5 & # 39; When installation, should reverse with the media. 3, the temperature of the thermometer should be all into the pipe. The thermometer insertion depth ( L) Press type calculation: L = L1 + & delta; + U type: L1 & ndash; — Instrument connection head length ( 毫米) : δ — — Wall thickness ( 毫米) ; U— — Immersion length ( 毫米) 。 When measuring liquid: UL = LS + 40 mm when measuring gas: UG = LS + 25 mm type: UL— — The liquid immersion length ( 毫米) ； UG - — The immersion length of the gas ( m m) ； LS— — The length of the sensitive period of thermometer ( 毫米) 。 Note: hot chariot accidentally sensitive length of about 22 mm, heat resistance and bimetallic thermometer is about 40 mm, pressure type thermometer song feeling length for wen packet length. 4, for small diameter pipeline, the thermometer can install in the elbow, or expanding diameter after installation. The thermocouple, heat resistance and bimetallic thermometer, pipe diameter should be expanded to 80 m m or 100 mm; Pressure type thermometer immersion length of expansion pipe diameter according to the calculated decision; The length of the expanding pipe diameter section is 250 ~ 300 mm. 5, measuring the temperature of thermocouple protection tube end more than the length of the furnace tube should be 50 ~ 100 mm; Horizontal installation of thermocouples inserted into the furnace of cantilever length shoulds not be more than 600 mm; Installed on the back to bend in the thermocouple junction box should be on the outside of the return bend box of insulation layer. 6, the installation of the furnace tube temperature measurement using surface thermocouple shall meet the following requirements: a) Between thermocouple and furnace flanged or threaded connections should be adopted; b） The length of the thermocouple furnace tube heat expansion factors should be considered; c) Thermocouple blade shape end should be tightly fixed on the furnace tube welding, blade length not less than 50 mm, near the blade will apply the appropriate metal clip thermocouple fixed on the furnace tube welding. 7, the installation of equipment on the thermocouple or heat resistance requirements: a) Different elevation of the thermocouple or heat resistance should be in the same direction installation; b） Equipment on the ontology of the thermocouple or heat resistance should be installed horizontally, can also be 45 & other; Installation, but should not collide with the equipment within the component or insert fluid corner: c) The length of the thermocouple or heat resistance in equipment shall not be less than 150 mm. d） Fractionation tower top temperature of the temperature measurement points should be located in the gas phase flow line; Other parts of the thermocouple or heat resistance, should be located in the liquid phase, the installation position or according to the requirement of process. 8, wear-resistant thermocouple protection tube end show set on the outer sleeve length should be 100 ~ 150 mm. 9, tanks on the inserting depth of the thermometer should not be less than 500 mm, the installation position should be higher than the tank heating coil 600 mm. Install the thermometer in the floating roof tank should not interfere with floating roof movement.