ASME B16.10-2000 pdf – FACE-TO-FACED END-TO-ENDDIMENSIONS OF VALVES
ASME B16.10-2000 pdf – FACE-TO-FACED END-TO-ENDDIMENSIONS OF VALVES.
2.4 Building End Valve Dimensions (Also see Section 4)
For buttwelding end valves, the end-to-end dimension is the distance between the extreme ends (root faces) of the welding bevels (see Fig. 2).
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 flanged angle type valves (those in which the ends are at an angle of 90 deg to each other), the centerto face dimension is the distance from the centerline of the port to the extreme end which is the gasket contact surface. For flanged angle type valves in which the gasket scaling surface is not located at the extreme end and for angle type valves having butrwetding ends. the phrase center-to-end denotes the distance from the centerline of the port 10 the estrcme end,
3 FACINGS OF FLANGED VALVES
Figure I 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.
3.1.2 2 mm (0.06 in.) Raised Face. Flanges for Class 250 ca.-t iron and fur Classes 150 and 300 steel. alloy, and ductile iron valves have 2 mm (0.06 in.) raised faces, which are included in the (ace-to-face (or center-to-face) dimension. When Classes ISO and 300 valves are required with flat faces, either the full Lluckness of flange or the thickness with the 2 mm (0.06 in.) raised face removed may be furnished, unless otherwise specified by the customer. Users are reminded that removing the 2 mm (0.06 in.) raised face will make the face-to-face dimension nonstandard.
3.1.3 1 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 (A9) summarizes data on all flange facings and can be used with Tables I to 6 (Al to A6) in calculating face-to-face and end-to-end dimensions of
3.3 Ring Joint Facings
The X dimension given in Table 10 (A 10). when added to the face.to-facc dimension of a valve having raised face Ranges in Tabks I to 6 (Al to A6), establishes the end-to-end dimension for the valve having flanges with ring jctnt facings.
4 VARIATiONS OF LENGTH WITHIN A CLASS OF VALVES
4.1 Butiwelding End Valves lAlso see Para.
Tables I to 6 (Al so A6) include end-to-end dirnensions for valves having buttwclding ends, in many cases, the dimensions are different from those of (aceto-face dimensions of flanged valves, as evidenced by the differences between dunensions .4 and B of the tables.
4.1.1 Short Pattern. For pressure seal or flangelcss bonnet valves having buttweldint ends in Class 600 and higher, the regular end-to-end dimensions shall be equal to the short pattern dimensions shown in Tables 3 to 6 (A3 to A6). At the manufacturer’s opion, the end-to-end dimensions of these valves may be the same as the face-to-face dimensions of raised lace Ranged valves.
4.12 Long Pattern. For flanged bonnet valves having buuwclding ends in Class 600 and higher. the regular end-b-end dimensions shall be equal so the face-to-face dimensions of raised face ftangcd valves shown in Tables 3 to 6 (A3 to A6). At the manufacturer’s option, the cod-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 manufacturer’s lengths into two or three sets of diniensions for a given size. At the manufacturer’s option, any of the two or three dimensions listed for a size may be used.
5.1 Straightway Valves
A tolerance of ±2 nun (±0.06 in.) shall be allowed on face-to-face and end o-cnd dimensions of valves of NPS 10 (DN 250) and smaller, and a tolerance of mm (±0.12 in.) shall be allowed (or NPS 12 (DN 300) and larger. For exceptions a related to wafer type arid butterfly valves, see General Note (b) in Table
7 (A7) and Notes (4) and (5) in Table 8 (A8).
5.2 Angle Valves
The tolerances on center-to-face and center-to-end dimensions of angle type valves shall be one-half those listed in para. 5.1.