ASME B1614 pdf free download

ASME B1614 pdf free download Ferrous Pipe Plugs, Bushings, and Locknuts With Pipe Threads
1 SCOPE
This Standard covers the following:
(a) pressure–temperature ratings
(b) size
(c) marking
(d) materials
(e) dimensions and tolerances
(f) threading
(g) pattern taper
2 GENERAL
2.1 References
Standards and specifications adopted by reference are shown in Mandatory Appendix II. It is not considered practical to identify the edition of each referenced stan- dard and specification in the text. Instead, the editions of the referenced standards and specifications are listed in Mandatory Appendix II.
2.2 Quality Systems Requirements relating to the product manufacturer’s quality system programs are described in Nonmandatory Appendix A.
2.3 Relevant Units This Standard states values both in metric units and U.S. Customary units. These systems of units are to be regarded separately. The U.S. Customary units are shown in parentheses or in separate tables. The values in these separate tables are not exact equivalents; there- fore, 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 particu- lar fluid service are notwithin the scope ofthis Standard.
2.5 Convention For determining conformance with this Standard, the convention for fixing significant digits where limits and maximum and minimum values are specified shall be rounded as defined in ASTM E 29. This requires that an observed or calculated value shall be rounded to the nearest unit in the last right-hand digit used for expressing the limit. Decimal values and tolerance do not imply a particular method of measurement.
2.6 Denotation
2.6.1 Pressure Rating Designation. Class followed by a dimensionless number is the designation for pressure–temperature ratings.
2.6.2 Size. Nominal pipe size (NPS) followed by a dimensionless number is the designation for nominal flange or flange fitting size. NPS is related to the refer- ence nominal diameter, DN, used in international stan- dards. The relationship is, typically, as follows:
3 PRESSURE–TEMPERATURE RATINGS (a) Pressure–temperature ratings for plugs and bush- ings shall be in accordance with ASME B16.4 if made of cast iron, or ASME B16.3 if made of malleable iron, ductile iron, or steel. Use of cored plugs or hexagon head bushings should be limited to Class 125 cast iron and Class 150 malleable iron threaded fittings. Solid plugs and face bushings are recommended for use with Class 250 cast iron fittings and Class 300 malleable iron fittings. (b) Locknuts are not pressure–temperature rated.
4 NOMINAL PIPE SIZE As applied in this Standard, the use of the phrase “nominal pipe size” or the designation NPS followed by a dimensionless number is for identifying the end connection of fittings. The number is not necessarily the same as the fitting inside diameter.
5 MARKING Each fitting shall be marked for identification with the manufacturer’s name or trademark, except where a marking is impractical.
6 MATERIALS (a) These fittings are furnished in gray iron, malleable iron, ductile iron, or steel as indicated in the individual tables. (b) The chemical and mechanical properties of cast material shall equal or exceed those properties listed in ASTM A 126, as applicable. Steel castings, forgings, or machined bar properties shall correspond to the compa- rable ASTM casting material specifications. The fittings manufacturer shall be prepared to certify conformance based on test data.
7 DIMENSIONS AND TOLERANCES (a) Dimensions in metric units are given in Tables 1 through 5 for various types of fittings. Corresponding U.S. Customary values are given in Tables I-1 through I-5 in Mandatory Appendix I. (b) At no point in the component wall shall the metal thickness be less than 90% of the values listed in the tables.
8 THREADS
8.1 Thread Form Threads shall be in accordance with ANSI/ASME B1.20.1. All internal taper pipe threads shall be countersunk a distance not less than one-half the pitch of the thread at an angle of approximately 45 deg with the axis of the thread. External taper pipe threads shall be chamfered at an angle between 30 deg and 45 deg with the axis. Countersinking and chamfering shall be concentric with the threads. (a) The length of threads specified in the tables shall include the countersink or chamfer.
(b) The maximum allowable variation in the align- ment of threads of all openings shall be 5.0 mm/m (0.06 in./ft).