ISO 12149 pdf download

ISO 12149 pdf download.Bolted bonnet steel globe valves for general-purpose applications 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of currently valid International Standards. ISO 7-1 :1 994, Pipe threads where pressure-tight joints are made on the threads — Part 1 : Dimensions, tolerances and designation. ISO 7-2:1 982, Pipe threads where pressure-tight joints are made on the threads — Part 2: Verification by means of limit gauges. ISO 261 :1 998, ISO general-purpose metric screw threads — General plan. ISO 263:1 973, ISO inch screw threads — General plan and selection for screws, bolts and nuts — Diameter range 0.06 to 6 in. ISO 4200, Plain end steel tubes, welded and seamless — General tables of dimensions and masses per unit length. ISO 5208, Industrial valves — Pressure testing for valves. ISO 5209, General purpose industrial valves — Marking. ISO 521 0, Industrial valves — Multi-turn valve actuator attachments. 3 Terms and definitions For the purposes of this International Standard, the definitions of nominal size (DN) and nominal pressure (PN) given in ISO 6708 and ISO 7268, respectively, apply. 4 Pressure/temperature ratings 4.1 The pressure/temperature ratings applicable to valves specified in this International Standard shall be in accordance with those specified in ISO 7005-1 for steel flanges of the applicable PN and material specification. Restrictions on temperature or pressure, for example those imposed by soft seals and special trim materials, shall be indicated on the valve identification plate (see 8.4.2). 4.2 The temperature shown in a particular pressure/temperature rating is the maximum temperature of the pressure-containing shell of the valve. In general, this temperature is the same as that of the fluid contained. Use of a pressure rating corresponding to a temperature other than that of the fluid contained is the responsibility of the user. 4.3 For temperatures below the lowest temperature shown in the pressure/temperature rating tables in ISO 7005-1 , the service pressure shall be no greater than the rating shown...