ASME B16.3-2016 pdf download
ASME B16.3-2016 pdf download.Malleable Iron Threaded Fittings Classes 150 and 300.
2.1 References
Standards and specifications adopted by reference in this Standard are shown in Mandatory Appendix II. It is not considered practical to identify the specific edition of each referenced standard and specification in the text. Instead, the specific editions of the referenced standards and specifications are listed in Mandatory Appendix II.
2.2 Quality Systems
Requirements relating to the product manufacturers’ quality system programs are described in Nonmandatory Appendix A.
2.3 Relevant Units
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 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.
2.4 Service Conditions
Criteria for selection of materials suitable for particular fluid service are not within the scope of this Standard.
7 DIMENSIONS AND TOLERANCES
7.1 General
The tolerances in Tables 2 and 1-2 are for center-to-end dimensions of the fittings. Center-to-end dimensions in millimeters are given for both straight and reducing fittings in Tables 3 through 18 (Tables 1-3 through 1-18 are in U.S. Customary units). The sketches of fittings shown in this Standard are representative and for the purpose of illustration.
7.2 Reducing Fittings
7.2.1 The dimensions of reducing fittings shown in Tables 4, 5, 8, 12, 13, and 15 (Tables 1-4, 1-5, 1-8, 1-12, 1-13, and 1-15) are for use only when making patterns for the specific reducing fitting in question and do not apply when a larger size pattern is reduced (i.e., “bushed”) to make the reduction or reductions in the fitting. Reducing pipe fitting patterns shall be designed to produce wall thicknesses, detail, and dimensions as required for the sizes involved.
