API 600-2009 pdf free download

API 600-2009 pdf free download.Steel Gate Valves—Flanged and Butt-welding Ends, Bolted Bonnets.
1 Scope This International standard specifies the requirements for a heavy-duty series of bolted bonnet steel gate valves for petroleum refinery and related applications where corrosion, erosion and other service conditions would indicate a need for full port openings, heavy wall sections and large stem diameters. This International standard sets forth the requirements for the following gate valve features: — bolted bonnet, — outside screw and yoke, — rising stems, — non-rising handwheels, — single or double gate, — wedge or parallel seating, — metallic seating surfaces, — flanged or butt-welding ends. It covers valves of the nominal pipe sizes NPS: — 1; 1 1 / 4 ; 1 1 / 2 ; 2; 2 1 / 2 ; 3; 4; 6; 8; 10; 1 2; 14; 1 6; 18; 20; 24, corresponding to nominal pipe sizes DN: — 25; 32; 40; 50; 65; 80; 1 00; 1 50; 200; 250; 300; 350; 400; 450; 500; 600, applies for pressure class designations: — 150; 300; 600; 900; 1500; 2500. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. API Standard 598, Valve Inspection and Testing ASME B1 .1 1 , Unified Inch Screw Threads (UN and UNR Thread Form)
3 Definitions 3.1 Class An alphanumeric designation that is used for reference purposes relating to valve pressure/temperature capability, taking into account valve material mechanical properties and valve dimensional characteristics. It comprises “Class” followed by a dimensionless whole number. The number following “Class” does not represent a measurable value and is not used for calculation purposes except where specified in this International standard. The allowable pressure for a valve having a class number depends on the valve material and its application temperature and is to be found in tables of pressure/temperature ratings. 3.2 DN An alpha numeric designation of size that is common for components used in a piping system, used for reference purposes, comprising the letters “DN” followed by a dimensionless number indirectly related to the physical size of the bore or outside diameter of the end connection as appropriate. The dimensionless number following “DN” does not represent a measurable value and is not used for calculation purposes except where specified. 3.3 NPS An alpha numeric designation of size that is common for components used in a piping system, used for reference purposes, comprising the letters “NPS” followed by a dimensionless number indirectly related to the physical size of the bore or outside diameter of the end connection as appropriate. The dimensionless number may be used as a valve size identifier without the prefix “NPS.” The dimensionless size identification number does not represent a measurable value and is not used for calculation purposes.
4 Pressure/Temperature Ratings 4.1 Pressure/temperature ratings shall be in accordance with those specified in the tables of ASME B1 6.34 for standard class for the applicable material specification and the applicable class. 4.2 Restrictions of temperature and concurrent pressure, or pressure and concurrent temperature, (e.g. those imposed by special soft seals or special trim materials), shall be marked on the valve identification plate (see Section 8). 4.3 The temperature for a corresponding pressure rating is the maximum temperature of the pressure-containing shell of the valve. In general, this temperature is the same as that of the contained fluid. The use of a pressure rating corresponding to a temperature other than that of the contained fluid is the responsibility of the user. 4.4 For temperatures below the lowest temperature listed in the pressure/temperature tables the service pressure shall be no greater than the pressure for the lowest listed temperature. The use of valves at lower temperatures is the responsibility of the user. Consideration should be given to the loss of ductility and impact strength of many materials at low temperature.