SAE J513:2019 pdf free

SAE J513:2019 pdf free.Refrigeration Tube Fittings – General Specifications
Size Designations- Fitting sizes throughout the dimensional tables are designated by the corresponding outside diameter of the tubing for flared type or solder type tube ends and by the corresponding standard nominal pipe size for pipe thread ends.
Dimensions and Tolerances- Except for nominal sizes and thread specifications,dimensions and tolerances are given in both SI and U.S. customary units as designated. Tabulated dimensions shall apply to the finished parts, plated or otherwise processed, as specified by the purchasers. Unless otherwise specified,the maximum and minimum across flat dimensions shall be within the commercial tolerance of bar or extruded stock from which the fttings are produced. The minimum across corners dimensions of hexagons shall be 1.092 times the nominal width across flats, but shall not result in a size flat width less than 0.43 times the nominal width across flats.
Tolerance on all dimensions not otherwise limited shall be ±0.25 mm (+0.010 in). Fitting seats shall be concentric with the straight thread pitch diameters within 0.25 mm (0.010 in) full indicator reading (FIR).Angular tolerance on axis of ends on elbows, tees, and crosses shall be +2.50 degrees for sizes up to and including 3/8 in, and±1.50 degrees for sizes larger than 3/8 in.
Where so ilustrated and not otherwise specified, hexagon corners shall be chamfered 30 degrees±5 degrees, to a diameter equal to the nominal width across flats, with a tolerance of -0.41 mm (-0.016 in); or where design permits, corners may be chamfered to the diameter of the abutting surface provided the length of chamfer does not exceed that produced by the 30 degree chamfer previously described.
Passages- Where passages in straight fttings are machined from opposite ends, the offset at the meeting point shall not exceed 0.38 mm (0.015 in). The cross-sectional area at the junction of passages in angle fttings shall not be less than that of the smallest passage. Where the passage is specified as a maximum or as tap drill diameter or less, the minimum shall be no less than the minimum diameter of the smallest passage in the ftting.SAE J513 pdf free download.