According to the National Climate Center, the average temperature in February was -1.2 °C in China, which was 1.7 °C higher than normal. Except for the temperature in the southwestern part of Hainan, which is 1°C lower than normal, the temperature in most other parts of the country is close to normal or high in the middle of the year, including most of the northwestern region, the central and western Inner Mongolia, the southeastern part of Southeast China, the southwestern part of Jiangnan, and the northeastern part of Yunnan. The ground is 2 to 4 °C higher.
The average precipitation in February was 11.4 mm, which was 4.9 mm less than normal. Most of North China, Huanghuai, northern and western Xinjiang, parts of central and eastern parts of northwestern China, and southwestern Tibet are more than 30% to 1 times, most of which are more than 1 times; It is 3 to 80% less, and some areas in the western part of the northwestern part of Tibet, central and northern Tibet, most of Yunnan, and southern Sichuan are less than 80%.
In February, the daily minimum temperature of six meteorological observatories across the country reached the standard of extreme low temperature events, mainly distributed in Heilongjiang, Chongqing, Gansu, Sichuan and Hainan, including Yuci (-24°C) and Linshui (-16.5°C). Baoting (2.1 ° C) and Fengdu (-5.5 ° C) reached or broke the historical extreme. The total number of consecutive precipitation-free days in 116 meteorological observatories across the country reached the extreme event standard, mainly distributed in North China, Huanghuai and other places, of which 25 stations reached or broke the historical extreme. Under the active organization of relevant government departments, the current drought situation has basically been lifted.
China has increased grain production for seven consecutive years, and its total output has stabilized at more than one trillion jin for four consecutive years. Since last winter to this year's new year, some of the severe droughts that have occurred in the winter wheat region of northern China have caused people's worries about this year's grain output. In response, government officials said that the drought poses a great threat to summer grain production, especially winter wheat production. However, he said that in late February of this year, there was a large amount of precipitation in the winter wheat area, and the drought in the dry area was effectively alleviated. China's scientific measures to combat drought are vigorous, and drought has not seriously affected winter wheat production and summer grain production this year.
Lap Joint Flanges (LJ Flanges) are used on piping fitted with lapped pipe or with lap joint stub ends the combined initial cost of the two items being approximately one-third higher than that of comparable Welding Neck Flanges.
Lap joint flange is having two components, a stub end, and a loose backing flange. Stub end is butt welded to the pipe and Backing flange freely move over the pipe. The backing flange can be of different material than stub material and normally of the carbon steel to save the cost. Lap flange is used where frequent dismantling is required, and space is constrained.
Furthermore, a standard lap joint flange will typically have a longer hub length in comparison to a slip on flange, but this is often considered unnecessary for many applications.
The lap joint flange is practically identical to a slip-on flange except it has a radius at the intersection of the bore and flange face.
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