ASME B16.1:2020 pdf free download

ASME B16.1:2020 pdf free download
ASME B16.1:2020 pdf free download.Gray Iron Pipe Flanges and Flanged Fittings
7.9.1 Threaded Connections. Holes maybe drilled and tapped in the wall offittings ifthe metal thickness is suffi- cientto provide the effective length ofthread as shown in Figure 7.9.1-1 and as specified in Table 7.9.1-1. Where thread length is insufficient due to metal thickness or size of tapping is such that reinforcement of opening is necessary, an integral boss should be added. In no case shall the effective length of thread A be less than that shown in Table 7.9.1-1. These lengths are equal to the effective thread lengths as shown in ASME B1.20.1.
7.9.2 Location Designation. The method of desig- nating the locations of the tapped holes for drains is shown in Figure 7.9.2-1. Each location is designated by a letter so that desired locations for the various types of fittings may be definitely specified without the use offurther illustrations or description. For further tapping details, see MSS SP-45.
8.1 Bolting
(a) All bolting materials shall have square, heavy hex, or hex heads and square, heavy hex, or hex nuts with full flat bearing faces as specified in ASME B18.2.1 for bolts and ASME B18.2.2 for nuts. Threads shall be UNC or UN8 and have a thread fit class of2A for bolts and 2B for nuts. Washer faced bolts or washer faced nuts are prohibited.
(b) Carbon steel bolts 1 in. and smaller shall have square heads (ASME B18.2.1) or heavy hex heads (ASME B18.2.1) and shall have square or heavy hex nuts (ASME B18.2.2). (c) Carbon steel bolts 1 1 ∕ 8 in. and larger shall have square heads (ASME B18.2.1), hex heads (ASME B18.2.1), or heavy hex heads (ASME B18.2.1) and shall have hex nuts (ASME B18.2.2) or heavy hex nuts (ASME B18.2.2) or square nuts (ASME B18.2.2). For bolt sizes 1 1 ∕ 2 in. and larger, stud bolts with a nut on each end are recommended.