(1) The provisional tax rate for curved pipe cutters is 4%, which is 50% lower than the original 8% MFN rate;
(2) In offset presses with a print speed of 14,000 pairs/hour or more for the four-color sheetfed offset press with the heading number 84443313; the double sided printing speed for folio-fronted sheets is greater than or equal to 13,000 sheets/hour;
(3) In the above article number, the one-sided or super full-page paper printing speed is greater than or equal to 7% of the provisional tax rate of 13,000 sheet-fed offset presses, which is a reduction of 30% from the original tax rate of 10%;
(4) In the offset printing machine with the speed of the sheet-fed offset press with the color of more than or equal to 16000 pairs of open/hours in the tariff number 84443319, more than 13,000 sheets/hour of the double-sided printing speed of the sheet-split sheet is added;
(5) The provisional tax rate of 7% or more for single-sheet or full-page sheet-fed single-sheet printing is 7%, which is a reduction of 30% from the original 10%.
U tube heat exchanger is suitable for the large temperature difference between tube side and shell side. The shell side media is easy to scale and needs cleaning, while the tube side media is clean and not easy to scale. It is also suitable for high temperature, high pressure, fluid corrosive working conditions.
Each heat exchange tube is bent into U-shape, the two ends are fixed in the upper and lower areas of the same Tube Sheet, and divided into two chambers of inlet and outlet with the partition in the tube box. This kind of heat exchanger completely eliminates the thermal stress, the structure is simpler than the floating type, but the tube side is not easy to clean.
The number of tubes is small, the utilization of the tube sheet is not frequent, and the shell side fluid is easy to short circuiting, which is unfavorable to heat transfer. If there is a leak or damage in the tube, the external U-tube can be replaced, while the broken inner tube can not be replaced, only plugged, and one broken U-tube means two broken, so the U-tube easily scrapped.
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Guangdong Jiema Energy Saving Technology Co.,Ltd , https://www.jiemaheatexchanger.com