API 599-2002 pdf free download

API 599-2002 pdf free download.Metal Plug Valves—Flanged, Threaded and Welding Ends.
1.1 SCOPE 1.1.1 This standard covers steel, nickel base and other alloy plug valves with ßanged or butt-welding ends and ductile iron plug valves with ßanged ends in sizes NPS 1 / 2 through NPS 24 and threaded or socket-welding ends for sizes NPS 1 / 2 through NPS 2. Valve bodies conforming to ASME B16.34 may have one ßange and one butt-welding end. 1.1.2 This standard covers additional requirements for plug valves that are otherwise in full conformance to the require- ments of ASME B16.34 for Standard Class 150 through 2500 or ASME B16.42 for Class 150 and 300. 1.1.3 This standard covers both lubricated and nonlubricated valves that have two-way coaxial ports; three-way and four- way plug valves are not discussed in this standard. This stan- dard includes requirements for valves Þtted with internal body, plug, or port linings or applied hard facings on the body, body ports, plug, or plug port. The extent of linings and the materials of which they are made are not covered in this standard. 1.1.4 Plug valves covered in this standard belong to one of four general design groups that in many cases have different face-to-face and end-to-end dimensions. Some types of plug valves are not made to all patterns. The four groups are described in 1.1.4.1 through 1.1.4.4. 1.1.4.1 The short-pattern design is found only in Class 150 and 300 where ßanged plug valves match the face-to-face dimensions of steel-ßanged gate valves in NPS 1 1 Ú 2 through NPS 12. 1.1.4.2 The regular pattern design has a plug port area that is greater than the venturi pattern. 1.1.4.3 Valves of the venturi pattern are designed for mini- mum pressure loss consistent with the reduced port area used in this type of valve. Venturi valves have a conÞguration of body and plug ports that approximates a venturi throat.
2.2.2 Face-to-face dimensions for raised-face and ring-joint ßanged-end valves and end-to-end dimensions for butt-weld- ing-end valves shall conform to ASME B16.10 or Table 3 as applicable. 2.2.3 End ßanges of steel valves shall be integrally cast or forged with the body; however, ßanges may be attached by full-penetration butt welding if this method is speciÞed in the purchase order. End ßanges attached by welding shall be cast or forged butt-welding ends. Welds shall conform to ASME B31.3, as shall qualiÞcations for the welding procedure and the welder or welding operator. The Þnished weld thickness shall not be less than the minimum body-wall thickness (see 2.2.1). No welding or brazing shall be permitted on ductile iron. 2.2.4 The dimensions and Þnish of steel end ßanges shall be as speciÞed in ASME B16.5 for the type of facing speci- Þed in the purchase order. Flat-face ßanges not covered by a lining material shall be Þnished as speciÞed in ASME B16.5 for raised-face ßanges. 2.2.5 The dimensions and Þnish of ductile iron-end ßanges shall be as speciÞed in ASME B16.42 for the type of facing speciÞed in the purchase order. 2.2.6 Socket-welding end preparation shall conform to ASME B16.11. The bottom of the socket shall be square and ßat with the thickness in accordance with Table 4 of ASME B16.34. 2.2.7 Steel butt-welding ends shall conform to ASME B16.25 for the bore speciÞed, for use without backing rings. 2.2.8 Threaded end valves shall be threaded as speciÞed in ASME B1.20.1. All internal threads shall be countersunk a distance of approximately one half the pitch of the thread at an angle of approximately 45 degrees with the axis of the thread. 2.2.9 When speciÞed, drain and bypass connections shall conform to ASME B16.34 and MSS SP-45, as applicable.
2.7 OPERATION 2.7.1 Plug valves shall be designed for operation by apply- ing a wrench (sometimes called a lever) or a handwheel to the stem either directly, or indirectly through the use of a gear mechanism or another mechanical device. The purchaser shall specify the type of operation required. Tables 2A and 2B show the standard method of operation for each valve class, pattern, and size. The length of the wrench or the gear ratio of the gear mechanism shall be designed such that the input force required to operate the valve does not exceed the opera- tor input force capability values given in MSS SP-91 using short-term force, a combined multiplier of 0.4 at the manu- facturerÕs maximum operating torque as deÞned in 2.4.3.