ASME B16.10-2000 pdf free download.FACE-TO-FACE AND END-TO-END DIMENSIONS OF VALVES
2.3 Flanged Valve Dimensions
2.3.1 Face-to-Face.The face-to-face dimension forflanged valves is the distance between the extremeEanu-which are the gasket contact surfaces (see Fig. 1). Faceto-face applies to flangea vafves:vnominal flange facing identifiers:
(a) flat
(b) 2 mm (0.06 in.) raised
(c) 7 mm (0.25 in.) raised
(d) large or small male*
(e) large or small tongue+
2.3.2 Installed Face-to-Face.The installed face-to-face dimension of certain butterfly valves [see Table8 (A8)，Note (1)] may include allowances for gasketor resilient-facing compression. Refer to Mss SP-67for definitive illustrations.
2.3.3 End-to-End. For those flanged valves wherethe gasket contact surfaces are not located at the extremeends of the valve,the distance between the extremeends is described as the end-to-end dimension and applies to flanged valves having the following nominalflange facing identifiers:
(a) ring joint
(b) large or small female(c) large or small groove
2.4Buttwelding End Valve Dimensions (Also see Section 4)
For buttwelding end valves, the end-to-end dimensionis 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 valvesis the distance between extreme ends.
2.6 Angle Valves
For flanged angle type valves (those in which theends are at an angle of 90 deg to each other), the center-to-face dimension is the distance from the centerline ofthe port to the extreme end which is the gasket contactsurface. For flanged angle type valves in which thegasket seating surface is not located at the extremeend and for angle type valves having buttwelding ends,the phrase center-to-end denotes the distance from thecenterline of the port to the extreme end.
FACINGs OF FLANGED VALVESFigure 1 shows facings for flanged ends.3.1 Facings Normally Furnished
3.1.1 Flat Face. Flanges for Classes 25 and 125cast iron valves are flat faced.
3.1.2 2 mm (0.06 in.) Raised Face. Flanges forClass 250 cast iron and for Classes 150 and 300 steel,alloy，and ductile iron valves have 2 mm (0.06in.)raised faces,which are included in the face-to-face (orcenter-to-face) dimension. When Classes 150 and 30ovalves are required with flat faces，either the fullthickness of flange or the thickness with the 2 mm(0.06 in.) raised face removed may be furnished, unlessotherwise specified by the customer. Users are remindedthat removing the 2 mm (o.06 in.) raised face willmake the face-to-face dimension nonstandard.
3.1.3 7 mm (0.25 in.) Raised Face. Flanges forClass 600 and higher steel and alloy valves have 7mm (0.25 in.) raised faces，which are included in theface-to-face (or center-to-face) dimensions.
3.2 Other Standard Facings
Table 9 (A9) summarizes data on all flange facingsand can be used with Tables 1 to 6 (Al to A6) incalculating face-to-face and end-to-end dimensions of flanged valves having standard facings other than thosedescribed in para.3.1.
3.3 Ring Joint Facings
The X dimension given in Table 10 (A10)，whenadded to the face-to-face dimension of a valve havingraised face flanges in Tables 1 to 6 (A1 to A6),establishes the end-to-end dimension for the valvehaving flanges with ring joint facings.
4 VARIATIONs OF LENGTH WITHIN A CLAss OF VALVES
4.1 Buttwelding End Valves (Also see Para.2.4)
Tables 1 to 6 (A1 to A6) include end-to-end dimen-sions for valves having buttwelding ends. In manycases, the dimensions are different from those of face-to-face dimensions of flanged valves,as evidenced bythe differences between dimensions A and B of thetables.
4.1.1 Short Pattern.For pressure seal or flangelessbonnet valves having buttwelding ends in Class 600and higher, the regular end-to-end dimensions shall beequal to the short pattern dimensions shown in Tables3 to 6 (A3 to A6). At the manufacturer’s option,theend-to-end dimensions of these valves may be the sameas the face-to-face dimensions of raised face flangedvalves.
4.1.2 Long Pattern. For flanged bonnet valveshaving buttwelding ends in Class 600 and higher，theregular end-to-end dimensions shall be equal to the face-to-face dimensions of raised face flanged valvesshown in Tables 3 to 6(A3 to A6).At the manufacturer’soption, the end-to-end dimensions may be the same asthe 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 diversityof manufacturer’s lengths into two or three sets ofdimensions for a given size. At the manufacturer’soption，any of the two or three dimensions listed fora size may be used.ASME B16.10 pdf download.ASME B16.10-2000 pdf free download
