The test results of a particular valve may be used to extend the classification to other valves per the following guidelines:a)To valves with identical stem(s) and body seal(s) material, geometry, and loading characteristics, whenthe stem(s) and body seal(s) diameters are within ±25% of the tested diametersb)To valves otherwise identical, meeting the criteria of 1.4a, which are applied below the tested temperature, down to ambient temperaturec)To valves otherwise identical, meeting the criteria of 1.4.a, which are of a lower pressure rating