According to the requirements for on-site inspection in Article 12.2.3 of GB50974 Technical Specifications for Fire Water Supply and Fire Hydrant Systems:

1 Outdoor fire hydrants should comply with the current national standard "General Technical Conditions for Outdoor Fire Hydrants" GB4452 Performance and quality requirements;

2 Indoor fire hydrants should comply with the performance and quality requirements of the current national standard "Indoor Fire Hydrants" GB3445; Performance requirements and test methods for lined fire hoses" Performance and quality requirements of GB6246;

4 Fire water nozzles should comply with the performance and quality requirements of the current national standard "Fire water nozzles" GB8181;

5. Fire hydrants, fire hoses, and fire water guns should have complete trademarks and manufacturer signs;

6. Technical parameters such as models and specifications of fire hydrants, fire hoses, and fire water guns should meet the design requirements;

7 The appearance of the fire hydrant should be free of processing defects and mechanical damage; the surface of the casting should be free of defects such as scars, burrs, cracks, and shrinkage holes; the exterior of the cast iron valve body should be painted with red paint, and the inner surface should be coated with anti-rust paint. Black paint should be applied; the external paint film should be smooth, flat, and consistent in color. There should be no defects such as bubbles, flow marks, wrinkles, etc., and there should be no obvious bumps, scratches, etc.

8 The threaded sealing surface of the fire hydrant should be free of scratches, burrs, missing or broken wires;

9 The threaded outlet and quick-connect buckle of the fire hydrant should be free of defects and mechanical damage. And should be able to meet the functional requirements;

10 The lifting or opening of the fire hydrant valve stem should be smooth and flexible, and there should be no jamming or looseness;

11 The interior of the rotary fire hydrant The structure should be reasonable, and the rotating parts should be copper or stainless steel, and the rotation should be guaranteed to be reliable without jamming or water leakage;

12 The pressure reducing and stabilizing fire hydrant should be reliable and free of clogging;

13 The movable parts should rotate flexibly, and the materials should be corrosion-resistant and should not get stuck or tripped;

14 The fixed interface of the fire hydrant should be tested for sealing performance, and should be qualified if there is no leakage or damage. . The number of tests should be randomly checked at 1 from each batch, but should not be less than 5. The pressure should be increased slowly and evenly by 1.6MPa, and the pressure should be maintained for 2 minutes. When two or more are unqualified, the batch of fire hydrants should not be used. When only 1 is unqualified, 2 more fire hydrants should be randomly inspected, but not less than 10, and the sealing performance test should be re-carried out; when there are still unqualified fire hydrants, this batch of fire hydrants should not be used;

15 The fabric layer of the fire hose should be woven evenly and the surface should be clean; there should be no double warp skipping, double warp breakage, weft skipping or scratches. The thickness of the lining (or covering layer) should be uniform, and the surface should be smooth and flat. No wrinkles or other defects;

16 The appearance quality of the fire water nozzle shall comply with the relevant provisions of paragraph 4 of this article, and the inlet and outlet calibers of the fire water nozzle shall meet the design requirements;

17 Fire hydrant box It should comply with the performance and quality requirements of the current national standard "Fire Hydrant Box" GB14561;

18 Fire hose reels should comply with the performance and quality requirements of the current national standard "Fire Hose Reel" GB15090.