ASME B16.26-2018 pdf – Cast Copper Alloy Fittings for Flared Copper Tubes.
ASME B16.26 establishes specifications for cast copper alloy fittings and nuts used with flared seamless copper tube conforming to ASTM B88 (water and general plumbing systems). Included are requirements for the following:
(a) pressure ratings
(b) site
(ç) marking
(d) material
(e dimensions
(f) threading
(g) hydrostatic testing
2.1 References
Codes, standards, and specifications containing provisions to the extent referenced herein constitute requiremenic of this Standard. These reference documents are listed in Mandatory Appendix I.
2.2 Convention
For deternhining 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 orcalculated 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 Unfts
This Stand.41d 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. The values 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.
2.4 QuaLity Systems
Requirements relating to the product manufacturer’s quality system program are described in Nonmandatory Appendix l.
2.5 Service Conditions
Criteria for selection of materials suitable for particular fluid service are not within the scope of this Standard.
The fittings covered by this Standard are designed for a maximum cold-water service pressure ol 1 200 kPa (175 psig).
The sizes at the fittings shown in Table 7.1-i correspond to standard water tube size a.s defined in ASTM 988.
Each titting shall be marked with the manufacturer’s name or trademark and other applicable markings as requIred by MSS SP-25. Marking of fittings less than nominal size 1/i is optional.
Fittings manufactured from cast copper alloys containing silicon shall he permanently marked with the designation Si.
Fittings manufactured from cast copper alloys containing bismuth shall be permanently marked with the designation B or Bi.
(cx) Castings intended for use in applications up to 204°C (400°F) shall be ola copper alloy produced to meet
(1) the requirements of ASTM B62 for copper alloy (INS No. C133600, or
(2) the chemical and tensile requirements of ASTM 9584 for copper alloy (iNS No.033800 or C84400 and in all other respects comply with the requirements of ASTM 962
(4) Castings intended for use In potable water applications up to 93°C (200°F) shall be low lead (0.25% or less) and shall be
(1) of a copper alloy produced to meet the require. ments of ASTM 9584 for copper alloy UNS No. C87950 or C89833, or
(2) of other cast copper alloys, provided the fittings produced meet mechanical and corrosion-resistant prop- cities needed or potable water application.