ASME B16.10:2017 pdf download

ASME B16.10:2017 pdf download.Face-to-Face and End-to-End Dimensions of Valves
1 SCOPE
1.1 General 1.1.1 Application. 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 ensure installation interchange- ability for valves of a given material, type, size, rating class, and end connection. Face-to-face and center-to- face dimensionsapplyto flangedendvalves withfacings 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 applyto buttweld- ing end and to flanged end valves with facings defined in para. 2.3.3. 1.1.2 Data Source Reference. Throughout this Standard, data references are cited, e.g., “extracted from” and “compatible with.” These data are relevant to the reference standard in place at the date shown in the Foreword for American National Standards Institute approval of this Standard. 1.2 Standard Units This Standard states values in both SI (Metric) and U.S. Customary units. These systems of units are to be regarded separately as standard. Within the text, the U.S. Customary units are shown in parentheses or in separate tables that appear in Mandatory Appendix I. The values stated in each system are not exact equiva- lents; therefore, it is required that each system of units be used independently of the other. Combining values from the two systems constitutes nonconformance with the Standard. 1.3 Cast Iron Valves Only flanged end valves (and others intended for assembly between flanges) are covered by this Standard. Mating dimensions and facings offlanged ends conform to those in ASME B16.1. Dimensional tables for various types and sizes of valves are specified in paras. 1.3.1 through 1.3.4.1.6 Convention For determining conformance with this Standard, the convention for fixing significant digits where limits (maximum and minimum values) are specified shall be as defined in ASTM E29. This requires that an observed or calculated value be rounded off to the nearest unit in the last right-hand digit used for expressing the limit. Decimal values and tolerances do not imply a particular method of measurement.
2 DEFINITIONS
2.1 Valve Size Designation 2.1.1 Nominal Diameter (DN). The size of a valve is designated by the nominal size of its end connections. This is denoted by (DN), a dimensionless number indi- rectly related to the physical size of the connecting pipe [See Tables 1 through 10 (Tables I-1 through I-10)]. The valve size is notnecessarilythe same as the inside diame- ter or port diameter. 2.1.2 Valve Size Designation. NPS, followed by a dimensionless number, is the designation for nominal valve size. NPS is related to the reference nominal diame- ters, DN, used in international standards.
4 VARIATIONS OF LENGTH WITHIN A CLASS OF VALVES
4.1 Buttwelding End Valves Tables 1 through 6 (Tables I-1 through I-6) include end-to-end dimensions for valves having buttwelding ends. In many cases, the dimensions are different from those of face-to-face dimensions of flanged valves, as evidenced by the differences 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 3 through 6 (Tables I-3 through I-6). 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 flanged bonnet valves hav- ingbuttweldingends inClass 600 andhigher, the regular end-to-end dimensions shall be equal to the face-to-face dimensions of raised face flanged valves shown in Tables 3 through 6 (Tables I-3 through I-6). At the manu- facturer’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, orextra wide for the purpose ofconsolidatinga diversity of manufacturer’s lengths into two or three sets of dimensions for a given size. At the manufacturer’s option, any of the two or three dimensions listed for a size may be used.