ASME B16.18-2012 pdf free
ASME B16.18-2012 pdf free.Cast Copper Alloy Solder Joint Pressure Fittings.
ASME B16.18 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 SI units are shown in parentheses or in separate tables that appear in Mandatory Appendix I. 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.
2.2 References
Standards and specifications adopted by reference in this Standard are shown in Mandatory Appendix II, which is part of this Standard. It is not considered practical to identify the specific edition of each standard and specification in the individual references. Instead, the specific edition reference is identified in Mandatory Appendix II.
2.3 QuaLity System
Requirements relating to the product manufacturer’s quality system programs are described in Nonmandatory Appendix C.
3 PRESSURE—TEMPERATURE RATINGS
3.1 Rating of Fitting and of Joint
The internal pressure—temperature ratings of the fittings are shown in Table 1.
The internI pressure—temperature rating for a solder joint fitting is dependent not only on fitting and tube Fittings manufactured from cast copper alloys containing bismuth shall 1w permanently marked with the designation B or 81.
6 MATERIAL
(a) Castings intended for use in applications up to 400°F (204°C) shall be of a copper alloy produced to meet
(1) the requirement of ASTM 862 Alloy C83600
(2) the tensile requirements of ASTM 5S4 Alloy C83800 or C84400 and in all other respects comply with the requirements of ASM B62
(1’) Castings intended for use in potable water applications, up to 200°F (93°C), shall be either
(1) of a copper alloy produced to meet the requirements of ASTM 54 Alloy C87850 or C89833, or
(2) of other cast copper alloys, provided the fillings produced meet mechanical and corrosion-resistant properties needed for potable water application
7 METAL THICKNESS
Dimensional variations occur in the casting process. Pattern equipment shall be designed to produce the metal thickness given for fittings in Table 3 or Table 1-3. The minimum wall-thickness shall not be less than 90% of the body and joint wall-thickness as shown in Table 3 or Table 1-3.
8 INSPECTION TOLERANCE
8.1 Convention
For determining conformance with this Standard, the convention for fixing significant digits where limits (maximum or 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.ASME B16.18 pdf download.
