API STD 603-2013 pdf free download

API STD 603-2013 pdf free download.Corrosion-resistant, Bolted Bonnet Gate Valves—Flanged and Butt-welding Ends.
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 “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 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. 3.4 shell Comprised of the body, bonnet, and body-bonnet bolting which constitute the pressure boundary of an API 603 valve.
6.2 Trim 6.2.1 The trim is comprised of the following: a) stem; b) body seating surface; c) gate seating surface; d) small internal parts that normally contact the service fluid (i.e. stem connections, internal pins or screws, and spreading mechanism of a double-disc valve). 6.2.2 The standard valve trim parts shall be made of a material with the same nominal chemical composition as the valve body and bonnet. Alternate trims and overlays (including those referenced in API 602 Table 12 and AWS A5.13 ECoCr-E and AWS A5.21 ECoCr-E hardfacing) can be supplied by agreement between Purchaser and manufacturer. 7 Testing, Inspection, and Examination 7.1 Inspection and Examination 7.1.1 The valve manufacturer shall examine each valve to assure compliance to this standard. 7.1.2 If inspection by the Purchaser is specified in the purchase order, inspection shall be in accordance with API 598. Examination by the manufacturer shall be as specified in API 598. 7.1.3 Cast surfaces of pressure boundary parts shall be visually inspected in accordance with MSS SP-55. 7.2 Pressure Tests Each valve shall be pressure tested as specified in API 598. 7.3 Repairs of Defects Defects in the shell of a cast or forged, carbon or alloy steel valve that are revealed by inspection or testing may be repaired as permitted by the most nearly applicable ASTM cast or forged material specification listed in ASME B16.34. 7.4 Supplementary Requirements Supplementary examination and testing (such as alloy verification [PMI], corrosion testing, NDE requirements, or other types) are required when specified in the purchase order. 8 Marking 8.1 General Valves shall be marked in accordance with the requirements of ASME B16.34, except that the nameplate shall include the designation “API 603” in addition to the designation ASME B16.34.
9 Preparation for Shipment 9.1 Coatings 9.1.1 Except for the handwheel or non-corrosion resistant material parts, valve parts shall not be painted. 9.2 Openings 9.2.1 Valve end flanges and welding ends shall be blanked to protect the gasket surfaces or welding ends and the valve internals during shipment and storage. The protective covers shall be made of wood, wood fiber, plastic, or metal and shall be securely attached to the valve ends by bolts, steel straps, steel clips, or suitable friction-locking devices. Covers shall be designed so that the valve cannot be installed without removal of protective cover. 9.2.2 Tapped connections shall be fitted with fully tightened and threaded solid plugs. 9.3 Gate Position The valve shall be shipped with the gate closed and with the stem threads lubricated. 9.4 Stem Packing The valve shall be shipped with the lantern ring, if specified, and the packing installed (see 5.9.2). Unless specified otherwise by the Purchaser, the packing gland bolts shall be tightened for shipment. 9.5 Packaging 9.5.1 Unless export packaging is specified in the purchase order, valves may be shipped loose, palletized, or packed in a box or crate. 9.5.2 When export packaging is specified in the purchase order, valves shall be shipped individually or collectively in wooden boxes or crates in a manner that will prevent shifting within the package.