ASME B16.26-2006 pdf free download.Cast Copper Alloy Fittings for Flared Copper Tubes.
1.2 References
Codes, standards, and specifications, containing provisions to the extent referenced herein, constitute requirements of this Standard. Thvse reference documents are listed in Mandatory Appendix IL
1.3 Convention
For the purpose of determining conformance with this Standard, the convention for fixing significant digits, where units or maximum or minimum values are sped- lied, shall be “rounding off” as defined in ASIM E 29, Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications. This requires that an ob5erved 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 nøt imply a particular method of measurement.
1.4 Relevant Units
This Standard states values in both metric and US. Customary units These systems of units are to be regarded separately as standard. Within the text, the US. Customary units are shown in parentheses or in separate tables. The ‘alues stated in each system are not exact equivalents 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,
1.5 Quality Systems
Requirements relating to the product manufacturer’squality system programs are described in Nonmanda-tory Appendix B.
1.6 Service Conditions
Criteria for selection of materials suitable for particu-lar fluid service are not within the scope of this Standard.
2PRESSURE RATING
The fittings covered by this Standard are designed fora maximum cold water service-pressure of 1 200 kPa(175 psig)-
3SIZE
The sizes of the fittings shown in Table 1 (Table 1-1)correspond to standard water tube size as defined inASTM B 88.
4MARKING
Each fitting shall be marked with the manufacturer’sname or trademark and other applicable markings asrequired by MSS SP-25,Standard Marking System forValves, Fittings. Flanges and Unions. Marking of fittingsless than nominal size h is optional.
5MATERIAL
Castings shall be copper alloy produced to meet thefollowing:
a) the requirements of ASTM B 62,Standard Specifi-cation for Composition Bronze or Ounce Metal Castings.UNS C83600;or
bythe chemical and tensile requirements of ASTMB 584,Standard Specification for Copper Alloy SandCastings for General Applications,UNs c83800 orC84400, and in all other respects shall comply with therequirement of ASTM B 62.
6DIMENSIONS
6.1 Fitting and Nut
The dimensions and tolerances of fittings and nutsshall be as shown in Table 1 (Table I-1). Design of the sealing surfaces of the fitting and nut shall be at thediscretion of the manufacturer.
6.2 Tube Flare
Dimensions relating to the flared end of the tube aredescribed in Nonmandatory _Appendix A. Sl units areshown in Table A-1 and u.s.Customary units are shownin Table A-2.
7THREADING
Straight threads shall conform to ASME B1.1 UnifiedInch Screw Threads (UN and UNR Thread Form) Class 2A external and Class 2B internal. The dimensions ofstraight threads are given in Tables 2 and 3 (Tables 1-2and I-3).
Taper pipe threads (NPT) shall conform toANsi/ AsME B1.20.1，Pipe Threads,General Purpose(Inch).
8HYDROSTATIC TEST
Hydrostatic testing is not required.