ASME B16.18:2021 pdf free download

ASME B16.18:2021 pdf free download.Cast Copper Alloy Solder Joint Pressure Fittings.
5 MARKING
Each fitting shall be permanently marked with the manufacturer’s name or trademark and other applicable markings as required by MSS SP-25. Marking of fittings less than Standard Water Tube Size or on any fitting where It damages soldering surfaces Is not required.
Fittings manufactured from cast copper alloys containing silicon shall be permanently marked with the designation Si.
Fittings manufactured from cast copper alloys containing bismuth shall be permanently marked with the designation 13 or Hi.
6 MATERIAL
(a) Castings intended for use in applications up to 44)0°F (204°C) shall be of a copper alloy produced to meet
(1) the requirement of ASTM B62 Alloy C83600
(2) the tensile requirements of ASTM 13584 Alloy C83800 or C84400 and, In all other respects, shall comply with the requirements of ASTM 1362
(b) Castings Intended for use In potable water applications up to 200°F (93°C) shall be low lead (0.25% or less) and shall be
(1) of a copper alloy produced to meet the requirements of ASTM B584 Alloy C87850 or C89833, or
(2) of other cast copper alloys, provided the fittings produced meet mechanical and corrosion-resistant properties needed for potable water application
7 METAL THICKNESS
Dimensional variatiuns ULLur in the casting prOcess. Pattern equipment shall be designed to produce the metal thickness given for fittings in Table 8.2-2. The minimum wall thickness shall be not less than 90% of the body and joint wall thickness as shown in Table 82-2.
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.
8.3 Ovatity
Miximum ovality shall not exceed 1% of the maximum diameters shown in Table 8.2-2. The average ol the maximum and minimum diameters must be within the dimensions shown in the table.
8.4 Gaging of Solder Joint Ends
8.4.1 Standard Gaging Method. The standard method of gaging the diameter tolerances for male and Female ends shall be by the use of plain plug and ring gages designed to hold the product within the limits established In Table 8.2.2.