ASME B16.10:2000 pdf download

ASME B16.10:2000 pdf download.FACE-TO-FACE AND END-TO-END DIMENSIONS OF VALVES
1 SCOPE
1.1 General This Standard covers face-to-face and end-to-end dimensions of straightway valves, and center-to-face and center-to-end dimensions of angle valves. Its purpose is to assure installation interchangeability for valves of a given material, type, size, rating class, and end connec- tion. Face-to-face and center-to-face dimensions apply to flanged end valves with facings defined in para. 2.3.1 and to other valves intended for assembly between flat face or raised face flanges. End-to-end dimensions apply to grooved end, buttwelding end, and flanged end valves with facings defined in para. 2.3.3. Center- to-end dimensions apply to buttwelding end and to flanged end valves with facings defined in para. 2.3.3. In Tables 1 to 6 (Tables A1 to A6),AorDin a column head denotes valves having flanged ends as illustrated; B or E denotes valves having buttwelding ends. 1.2 Standard Units The values stated in either millimeter units (Tables 1 to 10) or inch units’ (Tables A1 to Al0) are to be regarded separately as standard. Within the text, the inch units are shown in parentheses. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.6 Convention For the purpose of determining conformance with this Standard, the convention for fixing significant digits where limits, maximum or minimum values, are speci- fied shall be“rounding off’ as defined in ASTM Practice E29. This requires that an observed or calcu- lated value shall be rounded off to the nearest unit in the last right-hand digit used for expressing the limit. Decimal values and tolerance do not imply a particular method of measurement.
2 DEFINITIONS
2.1 Valve Size Designation 2.1.1 (DN) (Nominal Diameter). The size of a valve is designated by the nominal size of its end connections. This is denoted by (DN), a dimensionless number indirectly related to the physical size of the connecting pipe (See Tables 1 through 10). The valve size is not necessarily the same as the inside diameter or port diameter. 2.1.2 NPS (Nominal Pipe Size). The size of a valve is designated by the nominal size of its end connections. This is denoted by NPS, a dimensionless number indirectly related to the physical size of the connecting pipe (See Tables A1 through A10). The valve size is not necessarily the same as the inside diameter or port diameter. 2.1.3 Reduced port, gate, and ball valves conforming to API 6D are designated for size by two numbers, the first being the NPS (DN) on the valve ends, the second being the NPS (DN) of the port (seats, moving parts, etc.); e.g.,NPS6X 4(DN 150 X 100) designates a valve of end size NPS 6 (DN 150) with a port to match NPS 4 (DN 100). These valves. shall have face-to-face or end-to-end dimensions corTesponding to valves having the same size end connections; i.e., a NPS 6 X 4 (DN 150 X 100) valve shall have the face-to-face or end-to- end dimensions of a NPS 6 (DN 150) valve. 2.1.4 Reduced port, pressure seal bonnet, gate, globe, and check valves are designated for size by three numbers, the first and last being the NPS (DN) of the valve ends, the second being the NPS (DN) of the port;e.g.,NPS6X4X6(DN150X100X150) designates a valve having ends matching NPS 6 (DN 150) with a port to match NPS 4 (DN 100).2.6 Angle Valves For fanged angle type valves (those in which the ends are at an angle of 90 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 buttwelding ends, the phrase center-to-end denotes the distance from the centerline of the port to the extreme end.