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ASME B16.11 A182 F304 SW/Threaded Union
Threaded union joints probably represent the oldest method of joining piping systems. Like Socket Weld fittings, threaded fittings are mainly used for small pipe diameters (Small Bore Piping); generally for piping whose nominal diameter is NPS 2 or smaller.
The dimensional standards for taper pipe threads are given in ASME B1.20.1. That document gives all required dimensions including number of threads per inch, pitch diameter, and normal engagement lengths for all pipe diameters.
Standard | ASTM A182/ ASME SA182 |
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Dimension | 1/8" NB To 4" NB (Threaded) |
Dimension standard | ASME 16.11, MSS SP-79, 83, 95, 97, BS 3799 |
Type | Threaded Fittings |
Pressure Rating | Threaded End-2000lb/ 3000lb/ 6000lbs |
Type of threaded end | NPT, BSPT, BSPP |
Certificate | EN 10204/3.1B |
Nominal Diameter | Outside Diameter |
Wall Thickness |
Socket Bore |
Water way Bore |
Depth of Socket |
Length Assem Nominal |
|||
Dmin | Cmin | d1 | d2 | Jmin | L | ||||
DN | NPS |
Socket |
Threaded | Socket | Threaded | Socket | Socket & Threaded |
Socket | Socket & Threaded |
6 | 1/8 | 21.8 | 14.7 | 3.2 | 2.5 | 10.65 | 6.43 | 10 | 41.4 |
8 | 1/4 | 21.8 | 19.0 | 3.3 | 3.1 | 14.10 | 9.45 | 10 | 41.4 |
10 | 3/8 | 25.9 | 22.9 | 3.5 | 3.2 | 17.55 | 13.51 | 10 | 46.0 |
15 | 1/2 | 31.2 | 27.7 | 4.1 | 3.8 | 21.70 | 17.07 | 10 | 49.0 |
20 | 3/4 | 37.1 | 33.5 | 4.3 | 4.0 | 27.05 | 21.39 | 13 | 56.9 |
25 | 1 | 45.5 | 41.4 | 5.0 | 4.6 | 33.80 | 27.74 | 13 | 62.0 |
32 | 11/4 | 54.9 | 50.5 | 5.3 | 4.9 | 42.55 | 35.36 | 13 | 71.1 |
40 | 11/2 | 61.5 | 57.2 | 5.6 | 5.1 | 48.65 | 41.20 | 13 | 76.5 |
50 | 2 | 75.2 | 70.1 | 6.1 | 5.6 | 61.10 | 52.12 | 16 | 86.1 |
65 | 21/2 | 91.7 | 85.3 | 7.7 | 7.1 | 73.80 | 64.31 | 16 | 102.4 |
80 | 3 | 109.2 | 102.4 | 8.4 | 7.7 | 89.80 | 77.27 | 16 | 109.0 |