Fifteen basic technical requirements for stainless steel water tanks

1 The water tank shall comply with the requirements of this standard and be manufactured in accordance with the specified drawings and dimensions.

2 After the water tank is welded, the solid parts shall not be loose, and the connecting parts shall not have leakage welding or leakage.

3 The weld of the water tank should be full. The welding surface of the outer layer of the water tank should be smooth, beautiful, no slag inclusion, no welding, no porosity, no cracks. The welded joint should not be cracked or separated, and there must be no cutting hands. The tank welds in the tank are polished. At the same time, the welding requirements specified in Table 2 below should be met.

4 The flat bottom plate of the water tank should be kept flat and the deformation degree meets the requirements of Table 3.

5 The top of the tank and the manhole must be fully welded, and the quality requirements are the same as 4.3.

6 The connection ports of the water tank must be welded well and kept as vertical as possible, at least not more than 1°.

7 The insulation layer is firmly combined with the outer surface of the water tank and has a flat appearance. The insulation layer is made of polyurethane foam plastic or better insulation material; the outer decoration shell is made of stainless steel or other suitable materials, and the surface shall not be uneven, scratched or rusted, which meets the requirements of Table 2.

8 The tolerances for the external dimensions shall meet the requirements of Table 3 below.

9 The water tank is filled with water, and there shall be no seepage or water leakage. There shall be no obvious deformation phenomenon. It shall be carried out in accordance with the provisions of the steel welded atmospheric pressure vessel. (GB50242-2002 Construction Water Supply and Drainage and Heating Engineering Construction Quality Acceptance Specification)

10 The water tank should be vertical when it is erected, and the verticality should meet the requirements of Table 3.

11 The actual water volume of the water tank should not be less than the nominal volume.

12 The stainless steel plate used in the water tank should meet the requirements of GB/T3280. The plates used in the water tank must be made of 304 stainless steel. The inner and outer panel thickness tolerances are less than 10%.

13 The carbon steel used in the water tank shall comply with the provisions of GB/T 700. All iron parts of the water tank must be treated with anti-corrosion treatment. Anti-rust paint should be used for anti-rust treatment twice. For the exposed part, it is necessary to brush the silver paint twice.

14 The protruding parts inside and outside the manhole of the water tank should be treated with flanging or other protective treatment to avoid cutting people.

15 After cleaning, the water tank is filled with water in accordance with GB5749 and allowed to stand for 1h. The water at the outlet of the water tank should meet the requirements of GB5749.