ASME B18.31.2-2014 pdf download

ASME B18.31.2-2014 pdf download.Continuous Thread Stud, Double-End Stud, and Flange Bolting Stud (Stud Bolt) (Inch Series).
1 INTRODUCTION 1.1 Scope 1.1.1 This Standard covers the complete dimen- sional and general data for the following types of studs in inch dimensions: (a) continuous thread studs (b) double-end studs (c) flange bolting studs (stud bolts) These studs are recognized as American National Standard. The following configurations are covered: continuous thread stud: a stud that is threaded over its complete length. double-end (clamping type — identical ends) stud: a stud with screw threads of the same length and configuration on each end. This type of stud serves the function of clamping two bodies together with a nut on each end. double-end (tap-end type) stud: a stud designed to be installed in a tapped hole and usually with different threaded lengths on each end. For the tap end of the studs, both regular unified threads and interference-fit threads are covered. Double-end studs of the following body diameters are covered: (a) reduced-diameter body (see para. 6.1 for dimensions) (b) full body (see para. 6.2 for dimensions) flange bolting stud (stud bolt): a threaded stud used pri- marily in applications with flanges covered by ASME B16.5, and made using ASTM A01 bolting materials. 1.1.2 The inclusion of dimensional data in this Standard is not intended to imply that all products describedarestockproductionitems. Consumers should consult with suppliers concerning availability of products. 2 COMPARISON WITH ISO DOCUMENTS There is no comparable ISO standard. 3 REFERENCED STANDARDS The following is a list of publications referenced in this Standard. Unless otherwise specified, the reference shall be to the most recent issue at the time of order placement. ASME B1.1, Unified Inch Screw Threads (UN and UNR Thread Form) 1 ASME B1.3, Screw Thread Gaging Systems for Acceptability — Inch and Metric Screw Threads (UN, UNR, UNJ, M, and MJ) ASME B1.12, Class 5 Interference-Fit Thread ASME B16.5, Pipe and Flange Fittings ASME B18.2.8, Clearance Holes for Bolts, Screws, and Studs ASME B18.2.9, Straightness Gage and Gaging for Bolts and Screws ASME B18.12, Glossary of Terms for Mechanical Fasteners ASME B18.18, Quality Assurance for Fasteners ASME Y14.5, Dimensioning and Tolerancing Publisher: The American Society of Mechanical Engineers (ASME), Two Park Avenue, New York, NY 10016-5990; Order Department: 22 Law Drive, P.O. Box 2900, Fairfield, NJ 07007-2900 (www.asme.org) ASTM A193/A193M, Alloy-Steel and Stainless Steel Bolting Materials for High-Temperature Service ASTM A320/A320M, Alloy Steel Bolting Materials for Low-Temperature Service ASTM A354, Quenched and Tempered Alloy Steel Bolts, Studs, and Other Externally Threaded Fasteners ASTM A380, Standard Practice for Cleaning, Descaling, and Passivation of Stainless Steel Parts, Equipment, and Systems ASTM A437/A437M, Alloy-Steel Turbine-Type Bolting Material Specially Heat Treated for High-Temperature Service ASTM A449, Quenched and Tempered Steel Bolts and Studs ASTM A453/A453M, High-Temperature Bolting Materials With Expansion Coefficients Comparable to Austenitic Stainless Steels ASTM A540/A540M, Alloy-Steel Bolting Materials for Special Applications ASTM A1014/A1014M, Precipitation-Hardening Bolting Material (UNS N07718) for High Temperature Service ASTM F468, Nonferrous Bolts, Hex Cap Screws, and Studs for General Use ASTM F593, Stainless Steel Bolts, Hex Cap Screws, and Studs ASTM F788/F788M, Surface Discontinuities of Bolts, Screws, and Studs, Inch and Metric Series
6.1 Reduced Diameter Body The maximum body diameter is the minimum major diameter of the thread as defined in ASME B1.1. The minimumbodydiameteris the minimumpitchdiameter of the thread as defined in ASME B1.1. Dimensions are provided in Table 4. 6.2 Full Body The maximum body diameter is the same as the nomi- nal diameter of the fastener. The minimum body diame- ter is the minimum major diameter for the applicable threads as shown in ASME B1.1, Table 3A. These dimen- sions are provided in Table 4. NOTE: If the two ends of a stud have different threads, the mini- mum body diameter will be based on the thread with smaller minimum major diameter. 7 STUD LENGTH The difference between “continuous thread stud” and “flange bolting stud (stud bolt)” is that the length of continuous thread stud is defined by the overall length from end to end while the flange bolting stud length is defined from the first full thread on one end to the first full thread on the other end. 7.1 Overall Length of Continuous and Double-End Studs The overall length, L T , of the continuous and double- end type studs is the distance, parallel to the axis of the stud from one end to the other end, measured to the extreme condition on each end. The length tolerances in Table 5 are applied to this dimension.