ASME B16.10-2022 pdf download

ASME B16.10-2022 pdf download.Face-to-Face and End-to-End Dimensions of Valves.
2.4 Buttwelding End Valve Dimensions For buttwelding end valves, the end-to-end dimension is the distance between the extreme ends (root faces) of the welding bevels (see Figure 2.4-1). Also see section 4. 2.5 Grooved End Valve Dimensions The end-to-end dimension for grooved end valves is the distance between extreme ends. 2.6 Angle Valves For fanged angle type valves (those in which the ends are at an angle of90 deg to each other), the center-to-face dimension is the distance from the centerline of the port to the extreme end that is the gasket contact surfce. For flanged angle type valves in which the gasket seating surface is not located at the extreme end and for angle type valves having buttwelding ends, the phrase “center-to-end” denotes the distance fom the centerline of the port to the extreme end. 3 FACINGS OF FLANGED VALVES Figure 2.3.1-1 shows facings for flanged ends. 3.1 Facings Normally Furnished 3.1.1 Flat Face. Flanges for Classes 25 and 125 cast iron valves are flat faced. (22) 3.1.2 1.5 mm (0.06 in.) Raised Face. Flanges for Class 250 cast iron and for Classes 150 and 300 steel, alloy, and ductile iron valves have 1.5 mm (0.06 in.) raised faces, which are included in the face-to-face (or center-to­ fce) dimension. When Classes 150 and 300 valves are required with flat faces, either the full thickness of flange or the thickness with the 1.5 mm (0.06 in.) raised fce removed may be furnished, unless otherwise specified by the customer. Users are reminded that removing the 1.5 mm (0.06 in.) raised face will make the face-to-face dimension nonstandard. (22) 3.1.3 6.4 mm (0.25 in.) Raised Face. Flanges for Class 600 and higher steel and alloy valves have 6.4 mm (0.25 in.) raised faces, which are included in the face­ to-face (or center-to-face) dimensions.
3.3 Ring Joint Facings The X dimension given in Table 3.3-1, when added to the face-to-face dimension of a valve having raised face flanges in Tables 1.3-1 through 1.5-4, 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 Buttwelding End Valves Tables 1.3-1 through 1.5-4 include end-to-end dimen­ sions for valves having buttwelding ends. In many cases, the dimensions are different fom those of face-to-face dimensions of flanged valves, as evidenced by the differ­ ences 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 1.5-1 through 1.5-4. 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 fanged 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 1.5-1 through 1.5-4. 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 Certain butterfly valves are designated narrow, wide, or extra wide for the purpose of consolidating a diversity of manufcturer’s lengths into two or three sets of dimen­ sions for a given size. At the manufacturer’s option, any of the two or three dimensions listed for a size may be used.