Air defense fiberglass tanks Test Method 1, touch, visual welding air defense finished fiberglass tanks shall comply with the provisions of 4.2. 2, air defense fiberglass water tank test: close the drain valve and the valve, water to the required level, the 2h ~ 3h, air defense fiberglass tanks each part may not have significant deformation and leakage phenomenon. 3, test water quality indicators in GB / T 5750 regulations. 4, visual inspection: in normal light with visual inspection. 5, verticality air defense fiberglass tanks with gauges measuring, shall comply with 4.10. 6. The method of connecting flange connection GB T 9119-2000 specified / test; connecting pipe thread according to GB / T 7360.2-2000 prescribed method of test. 7, air defense fiberglass tanks used in stainless steel and carbon steel check their eligibility to purchase proved controversial press GB / T 3280 and GB method / T 700 provisions for testing. 8, insulation checked visually.