Is it necessary to inspect the gas storage tank with the volume of 1 m3 for Class I and Class D pressure vessels?

Simple pressure vessels that meet the following conditions do not need to be inspected, but the production enterprises need to have production qualifications.

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This procedure is applicable to simple pressure vessels that meet the following conditions:

(1) The container consists of a cylinder, a flat head, a convex head (excluding the spherical cap) or two convex heads;

(2) The materials of main pressure components such as cylinder, head and nozzle are carbon steel and austenitic stainless steel;

(3) The design pressure is less than or equal to 65438 0.6 MPa; ; (4) The volume is less than or equal to 1 000 L；;

(5) The product of working pressure and volume is greater than or equal to 2.5MPa? L, and less than or equal to 1000MPa? l；

(6) The medium is air, nitrogen and water vapor evaporated from medical distilled water;

(seven) the design temperature is greater than or equal to -20℃, and the maximum working temperature is less than or equal to150℃;

(8) Welding containers with indirect flame.