ASME B16.11 threaded fittings
Publish Time: 2016-03-25 Origin: www.kaysensteel.com
ASME B16.11 threaded fittings
• THREADED FITTINGS GENERAL
Socket weld fittings, threaded fittings are mainly used for small pipe diameters; generally for piping whose nominal diameter is NPS 4 or smaller.
The dimensional standards for taper pipe threads are given in ASME B1.20.1.
This document gives all required dimensions including number of threads per inch, pitch diameter, and normal engagement lengths for all pipe diameters.
1. Threaded piping is commonly used in low-cost, noncritical applications such as domestic water, fire protection, and industrial cooling water systems.
2. Threaded fittings are normally made of cast gray or malleable iron, cast brass or bronze, or forged alloy and carbon steel, standless steel.
3. They are available in three pressure ratings: 2000lbs, 3000lbs and 6000lbs.
• NPT THREAD
All fittings on this page are described, are provided with NPT thread, according to ASME B1.20.1.
The American National Pipe Thread Tapered, is the best known and most widely used connection where the pipe thread provides both the mechanical joint and the hydraulic seal.
NPT has a tapered male and female thread which seals with Teflon tape or jointing compound.
DIMENSIONS OF AMERICAN TAPER PIPE THREAD, WITH SEALANT COMPOUND
Dia Nominal NPT | Major Diameter mm | Tapping Drill Size mm | TPI | Pitch mm |
1/16" | 7.895 | 6.00 | 27 | 0.941 |
1/8" | 10.242 | 8.25 | 27 | 0.941 |
1/4" | 13.616 | 10.70 | 18 | 1.411 |
3/8" | 17.055 | 14.10 | 18 | 1.411 |
1/2" | 21.223 | 17.40 | 14 | 1.814 |
3/4" | 26.568 | 22.60 | 14 | 1.814 |
1" | 33.228 | 28.50 | 11.5 | 2.209 |
1 1/4" | 41.985 | 37.00 | 11.5 | 2.209 |
1 1/2" | 48.054 | 43.50 | 11.5 | 2.209 |
2" | 60.092 | 55.00 | 11.5 | 2.209 |
2 1/2" | 72.699 | 65.50 | 8 | 3.175 |
3" | 88.608 | 81.50 | 8 | 3.175 |
3 1/2" | 101.316 | 94.30 | 8 | 3.175 |
4" | 113.973 | 107.00 | 8 | 3.175 |
5" | 141.300 | 134.384 | 8 | 3.175 |
6" | 168.275 | 161.191 | 8 | 3.175 |
8" | 219.075 | 211.673 | 8 | 3.175 |
10" | 273.050 | 265.311 | 8 | 3.175 |
12" | 323.850 | 315.793 | 8 | 3.175 |
Description | Class Designation | ||
2000 | 3000 | 6000 | |
Elbows 45 and 90 degrees Tees, Crosses, CouplingHalf-Coupling, Cap | 1/2 - 4 | 1/2 - 2 | 1/2 - 2 |
1/2 - 4 | 1/2 - 2 | 1/2 - 2 | |
1/2 - 4 | 1/2 - 2 | 1/2 - 2 | |
Pipe Wall | SCH 80 and XS | SCH 160 | XXS |
Clik here to know more about pipe fittings:
1. Elbow:
45Degree CS butt weld elbow 90Degree CS butt weld elbow 180Degree CS butt weld elbow street elbow
1. Elbow:
45Degree CS butt weld elbow 90Degree CS butt weld elbow 180Degree CS butt weld elbow street elbow
45Degree SS butt weld elbow 90Degree SS butt weld elbow
45Degree socket weld elbow 90Degree socket weld elbow 180Degree SS butt weld elbow
45Degree socket weld elbow 90Degree socket weld elbow 180Degree SS butt weld elbow
2. Tee:
CS butt weld straight tee CS butt weld reducing tee socket weld tee
SS butt weld straight tee SS butt weld reducing tee threaded tee
Lateral tee:
Butt weld lateral tee High Pressure lateral tee
3. Cross:
SS butt weld straight cross SS butt weld reducing cross Socket weld cross Threaded cross
4. Reducer:
SS concentric reducer SS eccentric reducer
CS concentric reducer CS eccentric reducer
5. Cap:
SS butt weld cap socket weld cap threaded cap
6. Stub end:
CS stub end SS stub end
7. Coupling:
socket weld full coupling socket weld half coupling threaded full coupling threaded half coupling
8. Union:
socket weld union threaded union
9. Socket insert
10. Plug:
hex head plug square head plug round head plug
11. Bushing:
hex head bushing
12. Nipple:
TBE PBE TOE&POE Hex Nipple
13. Swaged nipple:
concentric swage nipple eccentric swage nipple
14. Flange:
Orifice flange lap joint flange threaded flange socket weld flange weld neck flange blind flange slip on flange
long weld neck flange plate flange spectacle blind
15. Outolet:
weldolet socketolet laterolet nipoflange nipolet
CS butt weld straight tee CS butt weld reducing tee socket weld tee
SS butt weld straight tee SS butt weld reducing tee threaded tee
Lateral tee:
Butt weld lateral tee High Pressure lateral tee
3. Cross:
SS butt weld straight cross SS butt weld reducing cross Socket weld cross Threaded cross
4. Reducer:
SS concentric reducer SS eccentric reducer
CS concentric reducer CS eccentric reducer
5. Cap:
SS butt weld cap socket weld cap threaded cap
6. Stub end:
CS stub end SS stub end
7. Coupling:
socket weld full coupling socket weld half coupling threaded full coupling threaded half coupling
8. Union:
socket weld union threaded union
9. Socket insert
10. Plug:
hex head plug square head plug round head plug
11. Bushing:
hex head bushing
12. Nipple:
TBE PBE TOE&POE Hex Nipple
13. Swaged nipple:
concentric swage nipple eccentric swage nipple
14. Flange:
Orifice flange lap joint flange threaded flange socket weld flange weld neck flange blind flange slip on flange
long weld neck flange plate flange spectacle blind
15. Outolet:
weldolet socketolet laterolet nipoflange nipolet