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ASME B16.14-2018 pdf download

ASME B16.14-2018 pdf download.Ferrous Pipe Plugs, Bushings, and Locknuts With Pipe Threads.
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 A126, as applicable. Steel castings, forgings, or machined bar properties shall correspond to the comparable ASTM casting material specifications. The fittings manufacturer shall be prepared to certify confor- mance based on test data. 7 DIMENSIONS AND TOLERANCES (a) Dimensions in metric units are given in Tables 7-1 through 7-5 for various types of fittings. (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 All threads shall be in accordance with ASME B1.20.1. 8.1.1 Countersinks and Chamfers. All internal taper pipethreadsshallbecountersunkorchamferedadistance ofnotless than one-halfthe pitch ofthe thread atan 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, for easier entrance in making a joint and protection of the thread. Countersinking and chamfering shall be concentric with the threads. The length of threads speci- fied in all tables shall be measured to include the counter- sink or chamfer. 8.1.2 Alignment. The maximum allowable variation in thealignmentofthreadsofallopeningsshallbe5.0 mm/m (0.06 in./ft). 8.1.3 Internal Threading. All fittings with internal threads, except locknuts, shall be threaded with ASME B1.20.1 NPT threads. The reference point for gaging is the starting end of the fitting, provided the chamfer does not exceed the major diameter of the internal thread. When a chamfer on the internal thread exceeds this limit, the reference point becomes the last thread scratch on the chamfer cone. 8.1.4 External Threading. All externally threaded fittings shall be threaded with ASME B1.20.1 NPT threads. The reference point for gaging is the end of the thread, provided the chamfer is not smaller than the minor diameter of the external thread. When a chamfer on the external thread exceeds this limit, the reference point becomes the last thread scratch on the chamfer cone. 8.1.5 Locknuts. Locknuts shall be threaded with ASME B1.20.1 NPSL threads. 8.2 Gaging Tolerances For taper pipe threads, the variation in threading shall be limited to one turn large orsmall from the gagingnotch on the plug or the gaging face of the ring when using working gages. 9 PATTERN TAPER Plug squares or hexagons, raised or countersunk, may have opposite sides tapered a maximum of 4 deg total.
The following is a list ofpublications referenced in this Standard. Unless otherwise specified, the latest edition of ASME publications shall apply. Materials manufactured to other editions ofthe referenced ASTM standards shall be permitted to be used to manufacture fittings meeting the requirements of this Standard as long as the fitting man- ufacturer verifies the material meets the requirements of the referenced edition. ANSI/ASME B1.20.1, Pipe Threads, General Purpose (Inch) ASME B16.3, Malleable Iron Threaded Fittings: Classes 150 and 300 ASME B16.4, GrayIronThreaded Fittings: Classes 125 and 250 ASME B18.2.1, Square, Hex, Heavy Hex, and Askew Head Bolts and Hex, Heavy Hex, Hex Flange, Lobed Head, and Lag Screws (Inch Series) Publisher: The American Society ofMechanical Engineers (ASME), Two Park Avenue, New York, NY 10016-5990 (www.asme.org) ASTM A126-04 (2014), Standard Specification for Gray Iron Castings for Valves, Flanges, and Pipe Fittings ASTM E29-13, Standard Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications Publisher: American Society for Testing and Materials (ASTM International), 100 Barr Harbor Drive, P.O. Box C700, West Conshohocken, PA 19428-2959 (www.astm.org) ISO 9000:2015, Quality management systems — Fundamentals and vocabulary 1 ISO 9001:2015, Quality management systems — Requirements 1 ISO 9004:2009, Managing for the sustained success ofan organization — A quality management approach 1 Publisher: International Organization for Standardization (ISO) Central Secretariat, ChemindeBlandonnet8, Case Postale 401, 1214 Vernier, Geneva, Switzerland (www.iso.org)

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