API STD 600:2001 pdf download

API STD 600:2001 pdf download.Bolted Bonnet Steel Gate Valves for Petroleum and Natural Gas lndustries.
5.9.4 A gland and a separate gland flange shall be provided for packing compression. The upper end of the gland shall have a lip whose outer diameter exceeds the diameter of the packing box bore so as to block entry into the bore. The gland ifange shall have two holes to receive the gland bolting. Gland flange bolt slots shall not be used.
5.9.5 The packing gland shall be flanged with two holes for the gland bolts (Slots for gland bolts shall not be used). The pland and gland flange shall be self aligning. The gland shall have a shoulder at its outer edge so as to prevent complete entry of the gland into the packing box.
5.9.6 A lantern ring shall be provided only if so specified by the purchaser. The lantern ring shall have two holes located 1800 apart on each end to facilitate its removal. These holes may be either through holes for use with a hook or threaded holes of the 1/2-course thread series (NO. 5-40 UNC) as specified in ASME Bi .1. When a lantern ring is installed, the packing box shall be tapped opposite the center of the installed lantern ring and shall be fitted with a threaded round or hexagon head plug greater than or equal to DN 8 (NPS 1/4) The plug shall be in accor• dance with ASME Bi 6.11. The packing box shall have a boss as specified in 5.12, proportioned for sizes not listed. In order to accommodate the lantern ring, the stuffing box depth shall be at least equivalent to that ot a minimum three uncompressed rings of packing above the lantern ring and three uncompressed rings of packing below the lantern ring plus the length of the lantern ring.
5.10 BoltIng
5.10.1 Bonnet-to-body joint bolting shall be continuously threaded stud bolts with heavy, semi-finished hexagon nuts that are in accordance in with ASME B18.2.2.
5.10.2 ‘Yblce-to-bonnel bolting shall be either continuously threaded stud bolts or headed bolts with hexagon nuts.
5.10.3 Gland bolts shall be hinged eyebolts, headed bolts, stud bolts or studs. Hexagon nuts shall be used.
5.10.4 Bolting 25 mm and smaller shall have coarse (UNC) threads or the most nearly corresponding metric threads. Bolting larger than 25 mm shall be 8 thread series (BUN) or the most nearly corresponding metric threads. Bolt threads shall be Class 2A and nut threads shall be Class 2B, in accordance with ASME 81.1. Studs used for gland bolting shall use a Class 5 interference fit conforming to ASME B1.12.
5.11 OperatIon
5.11.1 Unless otherwise specified by the purchaser, the valve shall be supplied with a direct operated handwheel that opens the valve when turned in a counter-clockwise direction.
5.11.2 The handwheel shall be a spoke-rim type with a maximum of six spokes and shall be free from burrs and sharp edges. Unless otherwise specified, the handwheel shall be a one piece casting or forging or a multi-piece carbon steel fabrication that Includes other carbon steel product forms. Fabncated handwheels shall have strength and toughness characteristics comparable to that of handwheels made as one piece castings or torgings.