UNITED STATES STANDARD SIZES OF WROUGHT IRON WELDED PIPE.
| Inside diam- eter nom. | Actual outside Diam- eter. | Thick- ness. | Actual Inside Diam- eter. | External circum- ference. | Internal circum- ference. | Length of pipe per square foot of outside surface. | Length of pipe per square foot of inside surface. | External area. | Actual internal area. | Length of pipe con- taining one cubic foot. | Weight per foot of length. | No. of threads per Inch of screw. | Length perfect screw. | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1⁄8 | .405 | .068 | 0 | .269 | 1 | .272 | 0 | .848 | 9 | .440 | 14 | .15 | .129 | .0572 | 2500 | . | .243 | 27 | 0.19 | ||||||
| 1⁄4 | .54 | .088 | 0 | .364 | 1 | .696 | 1 | .144 | 7 | .075 | 10 | .50 | .229 | .1041 | 1385 | . | .422 | 18 | 0.29 | ||||||
| 3⁄8 | .675 | .091 | 0 | .493 | 2 | .121 | 1 | .552 | 5 | .657 | 7 | .67 | .358 | .1916 | 751 | .5 | .561 | 18 | 0.30 | ||||||
| 1⁄2 | .840 | .109 | 0 | .622 | 2 | .652 | 1 | .957 | 4 | .502 | 6 | .13 | .554 | .3048 | 472 | .4 | .845 | 14 | 0.39 | ||||||
| 3⁄4 | 1 | .050 | .113 | 0 | .824 | 3 | .299 | 2 | .589 | 3 | .637 | 4 | .635 | .866 | .5333 | 270 | .0 | 1 | .126 | 14 | 0.40 | ||||
| 1 | 1 | .315 | .134 | 1 | .047 | 4 | .134 | 3 | .292 | 2 | .903 | 3 | .679 | 1 | .357 | .8627 | 166 | .9 | 1 | .670 | 11 | 1⁄2 | 0.51 | ||
| 1 | 1⁄4 | 1 | .660 | .140 | 1 | .38 | 5 | .215 | 4 | .335 | 2 | .301 | 2 | .768 | 2 | .164 | 1 | .496 | 96 | .25 | 2 | .258 | 11 | 1⁄2 | 0.54 |
| 1 | 1⁄2 | 1 | .90 | .145 | 1 | .61 | 5 | .969 | 5 | .061 | 2 | .010 | 2 | .371 | 2 | .835 | 2 | .038 | 70 | .65 | 2 | .694 | 11 | 1⁄2 | 0.55 |
| 2 | 2 | .375 | .154 | 2 | .067 | 7 | .461 | 6 | .494 | 1 | .611 | 1 | .848 | 4 | .430 | 3 | .355 | 42 | .36 | 3 | .667 | 11 | 1⁄2 | 0.58 | |
| 2 | 1⁄2 | 2 | .875 | .204 | 2 | .467 | 9 | .032 | 7 | .754 | 1 | .328 | 1 | .547 | 6 | .491 | 4 | .783 | 30 | .11 | 5 | .773 | 8 | 0.89 | |
| 3 | 3 | .50 | .217 | 3 | .066 | 10 | .996 | 9 | .636 | 1 | .091 | 1 | .245 | 9 | .621 | 7 | .388 | 19 | .40 | 7 | .547 | 8 | 0.95 | ||
| 3 | 1⁄2 | 4 | .0 | .226 | 3 | .548 | 12 | .566 | 11 | .146 | .955 | 1 | .077 | 12 | .566 | 9 | .837 | 14 | .56 | 9 | .055 | 8 | 1.00 | ||
| 4 | 4 | .50 | .237 | 4 | .026 | 14 | .137 | 12 | .648 | .849 | 0 | .949 | 15 | .901 | 12 | .730 | 11 | .31 | 10 | .728 | 8 | 1.05 | |||
| 4 | 1⁄2 | 5 | .0 | .247 | 4 | .506 | 15 | .708 | 14 | .153 | .765 | 0 | .848 | 19 | .635 | 15 | .939 | 9 | .03 | 12 | .492 | 8 | 1.10 | ||
| 5 | 5 | .563 | .259 | 5 | .045 | 17 | .475 | 15 | .849 | .629 | 0 | .757 | 24 | .299 | 19 | .990 | 7 | .20 | 14 | .564 | 8 | 1.16 | |||
| 6 | 6 | .625 | .280 | 5 | .065 | 20 | .813 | 19 | .054 | .577 | 0 | .630 | 34 | .471 | 28 | .889 | 4 | .98 | 18 | .767 | 8 | 1.26 | |||
| 7 | 7 | .625 | .301 | 7 | .023 | 23 | .954 | 22 | .063 | .505 | 0 | .544 | 45 | .663 | 38 | .737 | 3 | .72 | 23 | .410 | 8 | 1.36 | |||
| 8 | 8 | .625 | .322 | 7 | .981 | 27 | .096 | 25 | .076 | .444 | 0 | .478 | 58 | .426 | 50 | .039 | 2 | .88 | 28 | .348 | 8 | 1.46 | |||
| 9 | 9 | .688 | .344 | 9 | .00 | 30 | .433 | 28 | .277 | .394 | 0 | .425 | 73 | .715 | 63 | .633 | 2 | .26 | 34 | .677 | 8 | 1.57 | |||
| 10 | 10 | .750 | .366 | 10 | .018 | 33 | .772 | 31 | .475 | .355 | 0 | .381 | 90 | .762 | 78 | .838 | 1 | .80 | 40 | .641 | 8 | 1.68 | |||
Thread taper three-fourths inch to one foot.
All pipe below 11⁄2 inches is butt-welded, and proved to 300 pounds per square inch; 11⁄2 inch and above is lap-welded and proved to 500 pounds per square inch.
STANDARDS FOR WIRE GAUGES IN USE IN THE UNITED STATES.
Dimensions of Sizes in Decimal Parts of an Inch.
| Number of Wire Gauge. | American or Brown & Sharpe. | Birming- ham, or Stubs’ Wire. | Washburn & Moen Mfg. Co., Worces- ter, Ms. | Impe- rial Wire Gauge. | Stubs’ Steel Wire. | U. S. Stand. for Plate. | Number of Wire Gauge. |
|---|---|---|---|---|---|---|---|
| 000000 | .... | .... | .... | .464 | .... | .46875 | 000000 |
| 00000 | .... | .... | .... | .432 | .... | .4375 | 00000 |
| 0000 | .46 | .454 | .3938 | .400 | .... | .40625 | 0000 |
| 000 | .40964 | .425 | .3625 | .372 | .... | .375 | 000 |
| 00 | .3648 | .38 | .3310 | .348 | .... | .34375 | 00 |
| 0 | .32486 | .34 | .3065 | .324 | .... | .3125 | 0 |
| 1 | .2893 | .3 | .2830 | .300 | .227 | .28125 | 1 |
| 2 | .25763 | .284 | .2625 | .276 | .219 | .265625 | 2 |
| 3 | .22942 | .259 | .2437 | .252 | .212 | .25 | 3 |
| 4 | .20431 | .238 | .2253 | .232 | .207 | .234375 | 4 |
| 5 | .18194 | .22 | .2070 | .212 | .204 | .21875 | 5 |
| 6 | .16202 | .203 | .1920 | .192 | .201 | .203125 | 6 |
| 7 | .14428 | .18 | .1770 | .176 | .199 | .1875 | 7 |
| 8 | .12849 | .165 | .1620 | .160 | .197 | .171875 | 8 |
| 9 | .11443 | .148 | .1483 | .144 | .194 | .15625 | 9 |
| 10 | .10189 | .134 | .1350 | .128 | .191 | .140625 | 10 |
| 11 | .090742 | .12 | .1205 | .116 | .188 | .125 | 11 |
| 12 | .080808 | .109 | .1055 | .104 | .185 | .109375 | 12 |
| 13 | .071961 | .095 | .0915 | .092 | .182 | .09375 | 13 |
| 14 | .064084 | .083 | .0800 | .080 | .180 | .078125 | 14 |
| 15 | .057068 | .072 | .0720 | .072 | .178 | .0703125 | 15 |
| 16 | .05082 | .065 | .0625 | .064 | .175 | .0625 | 16 |
| 17 | .045257 | .058 | .0540 | .056 | .172 | .05625 | 17 |
| 18 | .040303 | .049 | .0475 | .048 | .168 | .05 | 18 |
| 19 | .03589 | .042 | .0410 | .040 | .164 | .04375 | 19 |
| 20 | .031961 | .035 | .0348 | .036 | .161 | .0375 | 20 |
| 21 | .028462 | .032 | .03175 | .032 | .157 | .034375 | 21 |
| 22 | .025347 | .028 | .0286 | .028 | .155 | .03125 | 22 |
| 23 | .022571 | .025 | .0258 | .024 | .153 | .028125 | 23 |
| 24 | .0201 | .022 | .0230 | .022 | .151 | .025 | 24 |
| 25 | .0179 | .02 | .0204 | .020 | .148 | .021875 | 25 |
| 26 | .01594 | .018 | .0181 | .018 | .146 | .01875 | 26 |
| 27 | .014195 | .016 | .0173 | .0164 | .143 | .0171875 | 27 |
| 28 | .012641 | .014 | .0162 | .0149 | .139 | .015625 | 28 |
| 29 | .011257 | .013 | .0150 | .0136 | .134 | .0140625 | 29 |
| 30 | .010025 | .012 | .0140 | .0124 | .127 | .0125 | 30 |
| 31 | .008928 | .01 | .0132 | .0116 | .120 | .0109375 | 31 |
| 32 | .00795 | .009 | .0128 | .0108 | .115 | .01015625 | 32 |
| 33 | .00708 | .008 | .0118 | .0100 | .112 | .009375 | 33 |
| 34 | .006304 | .007 | .0104 | .0092 | .110 | .00859375 | 34 |
| 35 | .005614 | .005 | .0095 | .0084 | .108 | .0078125 | 35 |
| 36 | .005 | .004 | .0090 | .0076 | .106 | .00703125 | 36 |
| 37 | .004453 | .... | .... | .0068 | .103 | .006640625 | 37 |
| 38 | .003965 | .... | .... | .0060 | .101 | .00625 | 38 |
| 39 | .003531 | .... | .... | .0052 | .099 | .... | 39 |
| 40 | .003144 | .... | .... | .0048 | .097 | .... | 40 |