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1 large water storage tanks applicable norms
For general industrial and civil construction, production and life of cold water in the water, such as fire water supply water storage. Applicable medium temperature is generally not more than 80 ℃, there are special requirements, can be made to the manufacturer.
2 large water storage tanks weld and its materials
2.1 water tanks and accessories materials using ordinary carbon steel and steel production, E43XX-type welding electrode, the quality should be consistent with the existing standards “carbon structural steel” and “carbon steel electrode” requirement.
2.2 box top, box wall, bottom of the steel plate splicing are used butt welding (roof for the I-type weld, floor and side wall with V-type weld), the other welding for the fillet weld, weld between the cross is not allowed Cross-phenomenon, and shall not coincide with the rib.
3 full water test
Large water storage tanks production is completed, the tank is completely filled with water, the 2-3 hours, with a weight of 0.5-1.5kg hammer along the weld on both sides of about 150mm place tapping, watertight as qualified. If found leaking place, need to re-welding, in the test.
5 water tank corrosion
??Full water test after passing, no outer surface by rust, in grinding the surface of the weld, sand blasting should be used to achieve Sa2 level, the use of artificial rust should reach St3 level. The inner surface of the spray glass corrosion. The outer surface brush Zhang Dan twice, brush oil to reconcile the paint twice.
4 Water tank accessories
??Water tank accessories: lock manhole, inside and outside the ladder, water level gauge, ventilation pipe, inlet pipe, outlet pipe, overflow pipe, drain pipe, can also be adjusted according to design needs.
5 water tank height greater than 1500mm, set inside and outside the ladder.
6 to consider the strength of the wall, the maximum opening shall not be greater than 200mm to take over, where the design calculation of diameter greater than 200mm should be designed two.
7 glass tube water level gauge, with more overlap with the erection, the erection of the length of 70-200mm.
8 water tank using the municipal pipe network water, inlet pipe valve set to export control, and when the diameter ≥ 50mm, should be set to two inlets.