ASME B16.12-2019 pdf free

ASME B16.12-2019 pdf free.Cast lron Threaded Drainage Fittings.
3 MARKING
Each fitting shall be marked with the manufacturer’s name or trademark in accordance with the requirements of MSS Standard Practice No. SP-25.
4 MATERIALS
4.1. Castings
The dimensions prescribed in this Standard (Tables 4.1-1 through 4.1-11) are based on gray iron castings of high quality produced under regular control of chemical and physical properties by a recognized process. The manufacturer shall be prepared to certify that the product has been so produced and that its chemical and physical properties, as proved by test specimens, are equal to the requirements specified in ASTM A126.
4.2 OptionaL MateriaL
Drainage fittings are regularly made of cast iron. At the option of the manufacturer, drainage fittings may be furnished of malleable iron complying with the minimum physical requirements of ASTM A197.
5 DIMENSIONS AND TOLERANCES
5.1 Dimensions
This Standard 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 Some dimensions of steel pipe from ASME B36.IOM are listed for convenience in Nonmandatory Appendix B in inches only. Tolerances applicable to dimensions of fittings are specified in paras. 5.2 through 5.6.
5.2 MetaL Thickness
At no point In the castings shall the metal thickness be less than 90% of the values listed in Table 4.1.1.
5.3 Thread Chamber
The length of thread and total length of thread chamber to shoulder shall not vary from the dimensions shown in the tables by more than plus or minus the equivalent of the pitch of one thread.
5.4 Outside Diameter and Width of Band
Tile minus tolerances given in Table 2.1-1 are permitted on inspection to apply to the diameter of the band and the width of the band.
5.5 Inside Diameter of Fitting
The inside diameter shall not vary from dimensions shown by more than the following:
(a) ±0.8 mm (0.03 in.) for NPS 1 /2 to 4. inclusive
(b) ±1.6 mm (0.06 in.) for NPS 5 to 8. inclusive
5.6 Center-to-End
The center-to-end dimensions shall not vary from the given dimensions by more than the values given in Table 2.1-2.
5.7 ShouLder
These fittings are provided with shoulders so that when used with Standard Wall Pipe (ASM E B36, 1OM). the end of the pipe practically meets the shoulder as the point Is made up, thereby forming a smooth passageway.ASME B16.12 pdf download.