ASME B16.36-2020 pdf free.Orifice Flanges.
2 GENERAL 2.1 References Codes, standards, and specifications containing provi- sions to the extent referenced herein constitute require- ments of this Standard. These reference documents are listed in Mandatory Appendix II. 2.2 Quality Systems Nonmandatory requirements relating to the product manufacturer’s Quality System Program are described in Nonmandatory Appendix A. 2.3 ð20Þ Relevant Units This Standard states values in both SI (Metric) and U.S. Customary units. As an exception, diameter of bolts and flange bolt holes are expressed in inch units only. These systemsofunitsaretoberegardedseparatelyasstandard. Within the text, the U.S. Customary units are shown in parentheses. 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. Except for diameter of bolts and flange bolt holes, combining values from the two systems constitutes nonconformance with the Standard. The main text of this Standard does not contain requirements expressed in SI units for Class 400 flanges; however, Mandatory Appendix I does contain requirements for this class, expressed in U.S. Customary units only.
10 JACK SCREW PROVISION 10.1 Location Each flange shall have a machine boltmounted in a hole drilled on the flange bolt circle centerline at 90 deg from thepressuretaps,foruseasajackscrew. Themachinebolt shall be regularwith one heavyhexnut. See Figure 10.1-1. 10.2 Slot for Nut A slot shall be provided in the flange 2 mm (0.06 in.) wider than the width across flats ofthe nut. The depth of the slotshall admitthe nutso thatthere is no interference with the joining of the flanges when bolted together without orifice plate. 10.3 Tapped Hole As an alternative to para. 10.2, a tapped hole may be provided and the hex nut omitted when agreed on between the purchaser and the manufacturer.
11 ð20Þ FLANGE DIMENSIONS Dimensions are listed in Tables 5-1 through 5-5. For flanges that have a ring-type joint facing, the flange thickness from back of the flange to the bottom of a ring joint groove shall be at least equal to the minimum flange thickness, t f . This requirement is illustrated in Tables 5-2 through 5-5 and Table I-1.
12 FLANGE THREADS Threaded flanges shall have anAmericanNational Stan- dard taper pipe thread conforming to ASME B1.20.1. (a) The thread shall be concentric with the axis of the flange. Variations in alignment shall not exceed 5 mm/m (0.06 in./ft). (b) The flanges are made withcounterbores atthe back of the flange and the threads shall be chamfered to the diameter ofthe counterbore at an angle ofapproximately 45 degwiththeaxisofthethreadtoaffordeasyentrancein making a joint. The counterbore and chamfer shall be concentric with the thread. (c) In order to permit the pipe to be inserted into the face of the flange, the threads should have full root diameters through to the face of the flange, or shall have a counterbore at the face of the flange. (d) The gaging notch of the working gage shall come flush with the bottom of the chamfer in all threaded flanges and shall be considered as being the intersection ofthe chamfer cone and the pitch cone ofthe thread. This depth of chamfer is approximately equal to one-half the pitch of the thread. (e) The maximum allowable thread variation is one turn large or small from the gaging notch.ASME B16.36 pdf download.