ASME B16.14-2010 pdf free download.Ferrous Pipe Plugs,Bushings, and Locknuts With Pipe Threads.
(10) 2 GENERAL
2.1 References
Standards and specifications adopted by reference an’ shown in Mandatory Appendix II. It is not considered practical to identify the edition of each referenced standard and specification in the text. Instead, the editions of the referenced standards and spedfications are listed in Mandatory Appendix II.
2.2 QuaLity Systems
Requirements relating to the product manufacturer’s quality system programs are described in Nonniandatory 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 US. Customary units are shown in parentheses or in separate tables. The values in these separate tables 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 Seivke Conditions
Criteria for selection of materials suitable for particuar fluid service are not within the scope of this 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 U 29. This requires that an observed or calculated value shall be rounded tothe nearest unit in the last right-hand digit used forexpressing the limit. Decimal values and tolerance donot imply a particular method of measurement.
2.6 Denotation
2.6.1 Pressure Rating Designation.Class followedby a dimensionless number is the designation forpressure-temperature ratings-
2.6.2Size. Nominal pipe size (NPS) followed by adimensionless number is the designation for nominalflange 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:
5 MARKING
Each fitting shall be marked for identification withthe manufacturer ‘s name or trademark, except where amarking is impractical.
6MATERIALS
(a)These fittings are furnished in gray iron, malleableiron, ductile iron, or steel as indicated in the individualtables.
(b)The chemical and mechanical properties of castmaterial shall equal or exceed those properties listed inASTM A 126, as applicable.Steel castings, forgings, ormachined bar properties shall correspond to the compa-rable ASTM casting material specifications.The fittingsmanufacturer shall be prepared to certify conformancebased on test data.
7DIMENSIONS AND TOLERANCES
a)Dimensions in metric units are given in Tables 1through 5 for various types of fittings. CorrespondingU.S.Customary values are given in Tables I-i throughI-5 in Mandatory Appendix L.
(b) At no point in the component wall shall the metalthickness be less than 90% of the values listed in thetables.
8THREADS8.1 Thread Form
Threads shall be in accordance with ANSI/ASMEB1.20.1.All internal taper pipe threads shall becountersunk a distance not less than one-half the pitchof the thread at an angle of approximately 45 deg withthe axis of the thread.External taper pipe threads shallbe chamfered at an angle between 30 deg and 45degwith the axis. Countersinking and chamfering shall beconcentric with the threads.
(a)The length of threads specified in the tables shallinclude 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).
8.2 Plugs
Plugs shall be threaded with ANSI/ ASME B1.20.1taper pipe threads. The variation in threading shall belimited to one turn large or one turn small from thegaging notch on the plug or the gaging face of the ringwhen using working gages.
8.3 Bushings
Bushings shall be threaded with American NationalStandard taper pipe threads. Gaging of all threads shallcomply with ANSI/ASME B1.20.1, except those sizes ofoutside hexagon bushings where the external threadlengths are shorter than those required by ANS1/ ASMEB1.20.1.These bushings should be threaded so that whenmaking up the joint, the shoulder of the head will notinterfere.To ensure this, the threads, when made to theminimum length, shall be gaged as listed below with atolerance of one turn large or one turn small.