Greenhouse is a building with lighting covering materials as all or partial envelope materials, and can be used for cultivated plants in winter or other seasons not suitable for exposed plants.
In northern China: it mainly plays the role of heat preservation and cultivation in early spring and autumn extension. When it can be 30 to 50 days early in spring, it can delay 20 to 25 days in autumn, and winter cultivation can not be carried out.
In southern China: in addition to the winter and spring for winter insulation of vegetables, flowers (leaf vegetables), can also be replaced with sunshade for shade cooling in summer and autumn, rain prevention, windproof, hail prevention and so on.
Therefore, materials as the source of greenhouse project projects, to close the quality of the project, first of all, from the selection of materials to the good close.For example, the hot galvanized pipe used in the greenhouse project, in the experienced galvanized plant hot plating, the quality inspection department to test, will be shipped to the construction site after passing the test.
Foshan Wanqing Materials Co., Ltd. spot wholesale hot galvanized plate, is a thin steel sheet immersed into the molten zinc tank, so that its surface adhesion to a layer of zinc thin steel plate.Mainly using the continuous galvanization process production, that is, the rolled steel plate is continuously immersed in the molten galvanized plating tank to make a galvanized steel plate.
Hot galvanization normal corrosion is not less than 30 years, cold plating corrosion a year or two on rust, the process is completely different, relatively speaking the price is relatively different.Galvanized steel pipe greenhouse is divided into hot galvanized and galvanized layers, thick, which has the advantages of uniform coating, strong adhesion and long service life.Electrogalvanized cost is low, the surface is not very smooth, and its own corrosion resistance is much different than that of hot galvanized tubes.
Hot galvanization can be divided into non-alloy galvanization and alloyed galvanization:
Non-alloy galvanizing includes general use, mechanical bite, deep flushing, ultra-deep flushing materials.When the galvanizing quantity is large, the corrosion resistance is superior, can be used as exposed parts, galvanized for hours, good processing performance.
Alloy galvanization includes stamping, structure, cold molding material, superior coating adhesion and welding performance of alloy thermal galvanization compared with pure galvanized layer, but it is easy to produce pulverized stripping during the process.
一般用：Q/BQB420 DC51D+Z DC51D+ZF
冲压用：DD51D+Z DC52D+Z DC52D+ZF
超深冲用：DD54D+Z DC56D+Z DC56D+ZF
Hot galvanized brand number:
General use: Q / BQB420 DC51D + Z DC51D + ZF
Stressing use: DD51D + Z DC52D + Z DC52D + ZF
Deep flushing use: DC53D + Z DC53D + ZF
Special deep flushing: DC54D + Z DC54D + ZF
Ultra-deep flush: DD54D + Z DC56D + Z DC56D + ZF
Such as the old house water pipe mostly is galvanized pipe, now gas, heating with the iron pipe is also galvanized pipe, galvanized pipe as water pipe, after a few years, the pipe produces a large amount of rust scale, out of yellow water not only pollution clean ware, and mixed with not smooth internal wall bacteria, corrosion caused water heavy metal content is too high, serious harm to human health.In the 1960s and 1970s, developed countries in the world began to develop new tubes, and successively banned galvanized tubes.The China Ministry of Construction and other four ministries and commissions have also issued a clear ban on galvanizing pipes from 2000, so cold water pipes in new communities have rarely use galvanizing pipes.
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