NATIONAL TAPER PIPE THREAD ASE B1.20.1

NATIONAL TAPER PIPE THREAD ASE B1.20.1 BUTT-WELDING ENDS ASME B16.5
NATIONAL TAPER PIPE THREAD ASE B1.20.1

DN Threads
Per Inch		 Pith of thread Thread length DIA. At Reference  Surface Boot DIA, of the pipe thread Height
in mm n p L1 L2 d d1 d2 d T h1
3/8 10 18 1.411 10.5 6.096 17.055 15.926 14.797 14.416 1.129
1/2 15 14 1.814 13.5 8.128 21.223 19.772 18.321 17.813 1.451
3/4 20 14 1.814 14 8.611 26.568 25.117 23.666 23.128 1.485
1 25 11-1/2 2.209 17.5 10.160 33.228 31.461 29.694 29.059 1.767
1-1/4 32 11-1/2 2.209 18 10.668 41.985 40.218 38.451 37.784 1.767
1-1/2 40 11-1/2 2.209 18.5 10.668 48.054 46.287 44.520 43.853 1.767
2 50 11-1/2 2.209 19 11.074 60.092 58.325 56.558 55.866 1.767

NATIONAL TAPER PIPE THREAD ASE B1.20.1 BUTT-WELDING ENDS ASME B16.5
SOCKET WELDING ENDS ASME B 16.11

DN in 3/8 1/2 3/4 1 1-1/4 1-1/2 2
mm 10 15 20 25 32 40 50
D mm 17.53 21.72 27.05 33.78 42.54 48.64 61.11
P (min) mm 9.6 9.6 12.7 12.7 12.7 12.7 15.8

SERVICE CARD
The technical data subject to amend without notice