API STD 602 2010 pdf download.Steel Gate, Globe, and Check Valves for Sizes NPS 4 (DN 100) and Smaller for the Petroleum and Natural Gas Industries.
1 Scope This international standard specifies the requirements for a series of compact steel gate, globe and check valves for petroleum and natural gas industry applications. It is applicable to valves of: — nominal pipe sizes NPS 1 / 4 , NPS 3 / 8 , NPS 1 / 2 , NPS 3 / 4 , NPS 1, NPS 1 1 / 4 , NPS 1 1 / 2 , NPS 2, NPS 2 1 / 2 , NPS 3, and NPS 4; — corresponding to nominal sizes DN 8, DN 10, DN 15, DN 20, DN 25, DN 32, DN 40, DN 50, DN 65, DN 80, and DN 100. It is also applicable to pressure designations of Class 150, Class 300, Class 600, Class 800 and Class 1500. Class 800 is not a listed class designation, but is an intermediate class number widely used for socket welding and threaded end compact valves. It includes provisions for the following valve characteristics. — Outside screw with rising stems (OS & Y), in sizes 1 / 4 ≤ NPS ≤ 4 (8 ≤ DN ≤ 100) and pressure designations including Class 800. — Inside screw with rising stems (ISRS), in sizes 1 / 4 ≤ NPS ≤ 2 1 / 2 (8 ≤ DN ≤ 65) and pressure designations of classes ≤ 800. — Socket welding or threaded ends, in sizes 1 / 4 ≤ NPS ≤ 2 1 / 2 (8 ≤ DN ≤ 65) and pressure designations of Class 800 and Class 1500. — Flanged or butt-welding ends, in sizes 1 / 2 ≤ NPS ≤ 4 (15 ≤ DN ≤ 100) and pressure designations of Class 150 through Class 1500, excluding flanged end Class 800. — Bonnet Joint Construction—Bolted, welded and threaded with seal weld for classes ≤ 1500 and union nut for classes ≤ 800. — Standard and full-bore body seat openings. — Materials, as specified. — Testing and inspection. This publication is applicable to valve end flanges in accordance with ASME B16.5, valve body ends having tapered pipe threads to ASME B1.20.1 or ISO 7-1, valve body ends having socket weld ends to ASME B16.11 and butt-weld connections per the requirements described within this standard.
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) ASME B1.5, Acme Screw Threads ASME B1.8, Stub Acme Screw Threads ASME B1.13M, Metric Screw Threads: M Profile ASME B1.20.1, Pipe Threads, General Purpose (Inch) ASME B16.5, Pipe Flanges and Flanged Fittings ASME B16.10, Face-to-Face and End-to-End Dimensions of Valves ASME B16.11, Forged Fittings, Socket-welding and Threaded ASME B16.34, Valves—Flanged, Threaded, and Welding End ASME B31.3, Process Piping ASME Boiler and Pressure Vessel Code (BPVC), Section IX: Welding and Brazing Qualifications ASTM A193 2 , Standard Specification for Alloy-steel and Stainless Steel Bolting Materials for High-temperature Service ASTM A194, Standard Specification for Carbon and Alloy Steel Nuts for Bolts for High Pressure and High- Temperature Service, or Both ASTM A307, Standard Specification for Carbon Steel Bolts and Studs, 60 000 PSI Tensile Strength EN 10269 3 , Steels and nickel alloys for fasteners with specified elevated and/or low temperature properties ISO 7-1 4 , Pipe threads where pressure-tight joints are made on the threads—Part 1: Dimensions, tolerances and designation ISO 7-2, Pipe threads where pressure-tight joints are made on the threads—Part 2: Verification by means of limit gauges ISO 2902, ISO metric trapezoidal screw threads—General plan
3 Terms and Definitions For the purposes of this document, the following definitions apply. 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 the letters “Class” followed by a dimensionless whole number. The number following the letters “Class” do not represent a measurable value and are not used for calculation purposes except where specified in this 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. Prefix “Class” usage is applicable to steel valves bearing NPS nominal size designations. 3.2 diameter nominal DN An alphanumeric 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 in this standard. Prefix “DN” usage is applicable to steel valves bearing PN designations. 3.3 nominal pipe size NPS An alphanumeric 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. Prefix “NPS” usage is applicable to steel flanges bearing class designations.