BS EN 12266-1:2012 pdf download – Industrial valves — Testing of metallic valves Part 1 : Pressure tests, test procedures and acceptance criteria — Mandatory requirements This European Standard specifies requirements for tests, test procedures and acceptance criteria for productiontesting of industrial valves made of metallic materials. The specified tests may also be used as type tests or acceptance tests. Safety devices are not covered by EN 12266-1. When specified as a normative reference in a valve product or performance standard, this European Standard is tobe considered in conjunction with given specific requirements of the valve product or performance standard.Whererequirements in a product or performance standard differ from those given in this European Standard,therequirements of the product or performance standard apply. NOTE For testing of industrial valves of thermoplastic materials, ISO 9393-1 and ISO 9393-2 apply. 2Normative references The following documents, in whole or in part,are normatively referenced in this document and are indispensablefor its application.For dated references, only the edition cited applies.For undated references, the latest edition ofthe referenced document (including any amendments) applies. EN 736-1:1995,Valves — Terminology — Part 1: Definition of types of valves EN 736-2:1997,Valves—Terminology— Part 2: Definition of components of valvesEN 736-3:2008,Valves – Terminology — Part 3: Definition of terms EN 1349,Industrial process control valves Terms and definitions For the purposes of this document,the terms and definitions given in EN 736-1:1995，EN 736-2:1997,EN 736-3:2008 and the following apply. 3.1 shell test test at a pressure in excess of the cold working pressure (3.7) rating of a valve for the purpose of validating thesoundness and strength of the valve pressure containing and retaining structures Note 1 to entry: These structures include valve-actuating mechanisms that have a direct connection to the valve internalssubject to fluid test pressure within the valve proper. 3.2 test pressure internal pressure (gauge), expressed in bar 1) to which the valve under testing is subjected Note 1 to entry: Unless otherwise noted, gauge pressure is used throughout this European Standard. 3.3 test fluid pressurized liquid or gas used to test a valve 3.4 test fluid temperature temperature of the test fluid, ≥ 5 C and ≤40°c 3.5 DN, NPS alphanumeric designation of size that is common for components used in a piping system, used for referencepurposes, comprising the letters “DN or NPS” followed or preceded by a dimensionless number indirectly related tothe physical size of the bore or outside diameter of the end connections...
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