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API STD 602:2010 pdf download

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.
5.2.3 The minimum cross-sectional area requirement for the full-bore flow passageway (except extended bodyvalves) applies for both the valve body ports and the seat opening in the absence of the valve disc.The minimum flowpassageway cross-sectional area shall not be less than that obtained using the diameters in Table 4.This standarddoes not provide for extended body valves (see Annex A) with full-bore openings.
5.3 Wall Thickness
5.3.1 Except as provided for in 5.3.2.and 5.3.3, the minimum wall thickness values for valve bodies, bonnets andcheck valve covers are given in Table 5.The manufacturer, taking into account such factors as bonnet bolting loads,rigidity needed for stem alignment, valve design details and the specified operating conditions, is responsible fordetermining if a larger wall thickness is required.
5.3.2 Valve body end connection minimum wall thickness shall be in accordance with 5.4.2,5.4.3,5.4.4, or 5.4.5 asapplicable.Valves identified as extended body valves shall have body extension minimum wall thickness inaccordance with A.3. Valves having bellows stem seals with a bellows enclosure shall have a bellows enclosureextension minimum wall thickness in accordance with B.4.
5.3.3 The bonnet minimum wall thickness for gate or globe valves, except for the neck extension that forms thepacking chamber entryway, shall be in accordance with Table 5. The packing chamber extension shall have a localminimum wall thickness as specified in Table 6, based on the local inside diameter of the packing and stem hole.
5.4Valve Body
Requirements for a basic valve body and associated end connections are given here.See Annex A for requirementsfor gate valve bodies having extended ends.
5.4.3Threaded Ends The threaded end thread axis shall coincide with the end entry axis. The minimum wall thickness at thethreaded end shall be in accordance with Table 4 of ASME B16.34.An approximate 45° lead-in chamfer, having anapproximate depth of one-half the thread pitch, shall be applied at each threaded end. The end threads shall be taper pipe threads meeting the requirements of ASME B1.20.1.When specified inthe purchase order, taper pipe threads in accordance with isO 7-1 may be substituted and must be noted on theidentification plate. Threads shall be gauged in accordance with ASME B1.20.1 or ISO 7-2,as applicable. End-to-end dimensions for threaded end valves shall be established by the manufacturer.5.4.4 Flanged Ends End flanges shall comply with the dimensional requirements of ASME B16.5.Unless otherwise specified,raised face end flanges shall be provided.This standard does not provide for flanged ends for Class 800 valves. flanges and bonnet flanges shall be cast or forged integral with, or inertial 5 welded to, the body, exceptthat cast or forged end flanges attached by full penetration butt-welding may be used when approved by thepurchaser. When a flange is attached by welding, the welding operator and welding procedure shall be qualified inaccordance with ASME BPvc Section lX or welders shall be qualified to lSO 9606-1, welding operators to lSO14732, and welding procedures prepared in accordance with ISo 15607 based on welding procedure qualificationtest in accordance with lSO 15614-1. The weld quality shall meet the examination acceptance standardsrequirements of ASME B31.3 or ISO 15649 as specified for normal fluid service.


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