ASME B16.26-2011 pdf – Cast Copper Alloy Fittings for Flared Copper Tubes.
ASME B16.26 establishes spctificatiorui for cast copper alloy fittings and nuts used with flared seamless copper tube conforming to ASTM B88 (water .ind general plumbing systems). Included are requirements for the following:
(a) pressure rating
(b) size
(c) marking
(U) material
() dimensions
(f) threading
(g) hydrostatic testing
2.1 References
Codes, standards, and specifications containing provisions to the extent referenced herein constitute requirements of this Standard. These reference documents are listed in Mandatory Appendix II.
2.2 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 F.29. 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.
2.3 Relevant 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 1. The values stated in each system are not exact equivalents; therefore, it is required that each system of tmits be used independently of the other, Combining values from the two systems constitutes nonconformance with the Standard.
2.4 Quality Systems
Requirements relating to the product manufacturer’s quality system programs arc described in Nonmandatory Appendix B.
2.5 Service Conditions
Criteria for selection of matenals suitable for particular fluid service are not within the scope of this 9andard,
The lilt ings covered by this Standard are designed for a maximum cold-water service pressure of 1 200 kPa (175 psig).
The sizes of the fittings shown in Table I (Table I-I) correspond to standard water tube size as defined in ASTM l3S8.
Each fitting shall be markil with the nunut.s.turers name or trademark and other applicable markings as required by MS SP-25. Marking of fittings less than nominal size 14 is optional.
Castings shall be copper alloy produced to meet the follow ing
(a) the requirements of ASTM 1362 UNS alloy CH3iO0 or
(b) the chemical and tensile requirements of ASTM 135K4 UNS alloy C3800 or CK4400 and in all other respects shall comply with the requirement of ASTM B62
7.1 FItting and Nut
The dinwnsions and tolerances of linings and nuts shall be as shown in Table I (Table I-I). Design of the sealing surfaces oE the fitting and nut shall be at the discretion of the manufacturer,
7.2 Tube Flare
Dimensions relating to the flared end of the tube are described in Nnnmandatorv Appendix A. SI units are shown in Table A-I, and U.S. Customaiy units are shown In Table A-2.