ASME B16.10-2009 pdf download

ASME B16.10-2009 pdf download.Face-to-Face and End-to-End Dimensionsof Valves.
2.1.3 Reduced Port Valves
(a) Reduced port, gate, and ball valves conforming to API 6D are designated for size by two numbers, the first being the NPS on the valve ends, the second being the NJ’S of the port (seats, moving parts, etc.); e.g., NPS 6 x 4 designates a valve of end size NPS 6 with a port to match NPS 4. These valves shall have face-to-face or end-to-end dimensions corresponding to valves having the same size end connections; i.e., a NPS 6 x 4 valve shall have the face-to-face or end-to-end dimensions of a NPS 6 valve.
(b) Reduced port, pressure seal bonnet, gate, globe, and check valves are designated for size by three numbers, the first and last being the NJ’S of the valve ends, the second being the NPS of theport; e.g., NPS6 x 4 x 6 designates a valve having ends matching NPS 6 with a port to match NPS 4. likewise, NPS 6 x 4 X 4 would designate a valve having one end matching NPS 6, the other matching NJ’S 4, and the port matching NI’S 4. These valves shall have face-to-face or end-to-end dimensions corresponding to valves having the same port size; i.e., either a NPS 6 x 4 X 6 or a NPS 6 x 4 x 4 valve shall have the face-to-face or end-to-end dimensions of a NJ’S 4 valve.
22 Pressure Rating Designations
Class, followed by a dimensionless number, is the standardized designation for pressure temperature- ratings used for valves. The numerical designations In use are as follows:
(a) for cast iron: 25, 125, 250
(b) for ductile iron: 150, 300
(c) for steel:2 150, 300, 600, 900, 1500, 2500
2.3 Flanged Valve Dimensions
2.3.1 Face-to-Face. The face-to-face dimension for flanged valves is the distance between the extreme ends which are the gasket contact surfaces (see FIg. 1). Face- to-face applies to flanged valves having the following nominal flange facing identifiers:
(a) flat
3.1.3 7 mm (0.25 In.) Raised Face. Flanges for Class 600 and higher steel and alloy valves have 7 mm (0.25 in.) raised faces, which are included in the face- to-face (or center-to-face) dimensions.
3.2 Other Standard Facings
Table 9 (Table 1-9) summarizes data on all flange facings and can be used with Tables I through 6 (Tables 1-1 through 1-6) in calculating face-to-face and end-to-end dimensions of flanged valves having standard facings other than those described in para. 3.1.
3,3 RIng Joint Facings
The X dimension given in Table 10 (Table 1-10), when added to the face-to-face dimension of a valve having raised face flanges in Tables I through 6 (Tables 1-1 through 1-6), establishes the end-to-end dimension for the valve having flanges with ring joint facings.
4 VARIATIONS OF LENGTh WITHIN A CLASS OF VALVES
4.1 Buttweldlng End Valves
Tables 1 through 6 (Tables 1-I through 1-6) include end-to-end dimensions for valves having buttwelding ends. In many cases, the dimensions are different from those of face-to-face dimensions of flanged valves, as evidenced by the differences between dimensions A and B of the tables.
Also see para 2.4.
4.1.1 Short Pattern. For pressure seal or flangeless bonnet valves having buttwelding ends in Class 600 and higher, the regular end-to-end dimensions shall be equal to the short pattern dimensions shown in Tables 3 through 6 (Tables 1-3 through 1-6). At the manufacturer’s option, the end-to-end dimensions of these valves may be the same as the face-to-face dimensions of raised face flanged valves.
4.1.2 Long Pattern. For flanged bonnet valves having buttwelding ends in Class 600 and higher, the regular end-to-end dimensions shall be equal to the face-to-face dimensions of raised face flanged valves shown in Tables 3 through 6 (Tables 1-3 through 1-6). At the manufacturer’s option, the end-to-end dimensions may be the same as the short pattern end-to-end dimensions.
4.2 Narrow, Wide, and Extra Wide Designations。