ASME B16.10 pdf free download

ASME B16.10-2017 pdf free download.Face-to-Face and End-to-End Dimensions of 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 NPS of the port (seats, moving parts, etc.); e.g., NPS 6 x 4 designates a valve of end size NI’S 6 with a port to match NI’S 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 NI’S 6 X 4 valve shall have the face-to-face or end-to-end dimensions of a Ni’S 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 NI’S of the valve ends, thesecond beingtheNl’Softheport;e.g.,NPS6 X 4 X 6 designates a valve having ends matching Ni’S 6 with a port to match NPS 4. Likewise, NPS 6 x 4 x 4 would designate a valve having one end matching NI’S 6, the other matching NPS 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 NI’S 6 X 4 X 6 or a Ni’S 6 X 4 X 4 valve shall have the face-to-face or end-to-end dimensions of a NI’S 4 valve.
2.2 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:’ 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
(b) 2 mm (0.06 in.) raised
(c) 7 mm (0.25 in.) raised
(d) large or small male2
(e) large or small tongue2
2.3.2 Installed Face-to-Face. The installed face-to- face dimension of certain butterfly valves Isee Table 8 (Table 1-8), Note (6)1 may include allowances for gasket or resilient-facing compression. Refer to MSS SP-67 for definitive illustrations.
2.3.3 End-to-End. For those flanged valves where the gasket contact surfaces are not located at the extreme ends of the valve, the distance between the extreme ends is described as the end-to-end dimension and applies to flanged valves having the following nominal flange facing identifiers:
(a) ring joint
(b) large or small female
(c) large or small groove
2.4 Buttweldlng 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 Fig. 2).
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 AngIe Valves
For flanged angle type valves (those in which the ends are at an angle of 9() deg to each other), the center-to- 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 seating surface is not located at the extreme end and for angle type valves having huttwelding ends, the phrase center-to-end denotes the distance from the centerline of the port to the extreme end.
3 FACINGS OF FLANGED VALVES
Figure 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 laced.
3.1.2 2 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 2 mm (0.06 in.) raised laces, which are included in the face-to-face (or center- to-face) dimension. When Classes 150 and 300 valves are required with flat faces, either the full thickness 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 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.ASME B16.10 pdf download.