ASME B16.15-2013 pdf free

ASME B16.15-2013 pdf free.Cast Copper Alloy Threaded Fittings.
Use of cored plugs and hexagon or octagon head bushings should be limited to Class 125 pipe fittings. Solid plugs and face bushings are recommended for use with Class 250 pipe fittings.
4 SIZE
4.1 Nominal Pipe Size
The size of the pipe fittings scheduled in the following tables is identified by the corresponding nominal pipe size (NPS),’
4.2 Reducing Sizes
In the case of reducing tees, crosses, and V branches (laterals), the NPS of the largest run opening shall be given first, followed by the NI’S of the opening at the opposite end of the run. Where the pipe fitting is a tee or Y branch (lateral), the NI’S of the outlet is given last. Where the pipe fitting is a cross, the largest side-outlet opening is the third dimension given, followed by the opening opposite. The straight line sketches of Fig. 1 illustrate how the reducing pipe fittings are read.
5 MARKING
5.1 Class 125 FItting
Each Class 125 pipe fitting shall be marked for identification with the manufacturer’s name or trademark.
5.2 Class 250 FItting
Each Class 250 pipe lifting shall be marked for identification with the manufacturer’s name or trademark and the numerals “250.”
5.3 Exceptions
Omission of markings is permissible when fittings are too small to provide sufficient marking area.
6 MATERIAL
(a) Castings shall be produced to meet the requirements of ASTM 862, alloy UNS C83600, or the chemical and tensile requirements of ASTM 8584. alloys UNS C83800 or UNS 04400, and in all other respects shall conform to the requirements of ASTM 862.
8 RIBS
The addition of ribs or lugs is permitted on threaded pipe fittings. Where ribs are used, it is recommended that their thickness be the same as specified for the metal thickness of the pipe fitting.
(a) Right-hand couplings shall not have more than two ribs.
(b) Right- and left-hand couplings shall have four or more ribs unless the left-hand opening is clearly marked “L,” in which case the use of ribs is optional with the manufacturer.
(C) Wrought couplings do not require opening markings.
9 SURFACE FINISH
Cast pipe fittings shall be furnished with a rough exterior surface, free of sand inclusions, fins, and gate protrusions.
10 FITTING DIMENSIONS
(a) Tables of center-to-end dimensions are given for both straight and redudng pipe fittings. Dimensions and tolerances shown as whole or multiples of 0.5 mm may differ slightly in absolute value from the corresponding dimensions in Mandatory Appendix I. Any dimension that is within tolerance by either SI or Customary measurement is considered to be in conformance with this Standard.
(1) The dimensions shown in Tables 5 through 9 (Tables 1-5 through 1-9) for fittings are for use only when making patterns for the specific reducing pipe fitting in question and do not apply when a larger size pattern is bushed to make the reducing pipe fitting wanted. Reducing pipe fitting patterns shall be designed to produce wall thicknesses and detail and dimensions as required for the sizes involved.ASME B16.15 pdf free download.