Auspex Gas
Sizing Tables

The Auspex Gas pipe and fitting system is a revolutionary alternative for the professional plumber and gasfitter that makes any job quicker and easier.

Only available in Australia.

Pipe Sizing

The following example is for natural gas using:

  • Supply Pressure 2.75kPa
  • Pressure Drop 0.75kPa
Pipe Section A→D A→B B→C C→D C→E B→F*
Pipe
Length
20 5 5 10 4 4
Gas Flow
MJ/h
305 165
+ 85
+ 55
= 305
85
+ 55
= 140
55 85 165
Fitting
Correction
0.8
+ 1.7
+ 1.7
= 4m
Corrected
Index Run
24m 24m 24m 24m 24m 24m
Nominal
Pipe Size
Corrected
32mm 25mm 16mm 20mm 25mm
Nominal
Pipe Size
Uncorrected
25mm 25mm 16mm 20mm 25mm

* In keeping with gasfitting best practice, if any value is close to the limit, upsize.

Natural Gas

Pressure Drop 0.075 (Meter Pressure 1.1kPa)

Length of main run in metres

Nominal
Size
2 4 6 8 10 12 14 16 18 20 25 30 35 40 45 50 55 Correction
(+ mt for fitting)
16mm 81 55 44 36 33 29 26 25 23 1.2
20mm 130 86 69 59 52 47 42 39 37 35 31 27 25 23 21 20 19 1.1
25mm 309 207 165 141 123 110 101 94 88 83 74 66 60 55 52 49 46 0.6
32mm 593 405 323 271 235 214 195 181 170 159 142 126 115 107 99 95 90 0.5
Nominal
Size
60 65 70 75 80 85 90 95 100 120 140 160 180 200 250 300 Correction
(+ mt for fitting)
16mm 1.2
20mm 18 1.1
25mm 44 42 40 38 37 36 35 34 33 0.6
32mm 85 81 77 75 72 69 67 65 63 61 53 48 45 43 38 34 0.5
Pressure Drop 0.75 (Meter Pressure 2.75kPa)

Length of main run in metres

Nominal
Size
2 4 6 8 10 12 14 16 18 20 25 30 35 40 45 50 55 Correction
(+ mt for fitting)
16mm 313 208 166 143 122 109 102 93 89 83 74 65 60 56 52 49 46 1.7
20mm 495 340 264 221 197 177 161 153 140 133 117 105 95 89 84 77 75 1.5
25mm 1176 789 622 532 467 421 386 358 334 313 281 248 224 215 197 186 175 0.8
32mm 2284 1547 1180 1048 893 828 737 685 657 610 537 479 440 408 384 360 337 0.7
Nominal
Size
60 65 70 75 80 85 90 95 100 120 140 160 180 200 250 300 Correction
(+ mt for fitting)
16mm 45 43 40 38 36 35 1.7
20mm 70 67 65 61 59 57 55 55 53 47 43 40 37 35 31 27 1.5
25mm 169 161 154 147 142 136 133 128 125 112 104 95 89 84 74 67 0.8
32mm 326 308 296 284 272 263 255 246 243 217 198 184 172 162 142 128 0.7
Pressure Drop 1.5 (Meter Pressure 5 – 10kPa)

Length of main run in metres

Nominal
Size
2 4 6 8 10 12 14 16 18 20 25 30 35 40 45 50 55 60 Correction
(+ mt for fitting)
16mm 476 322 255 215 192 171 157 145 136 127 113 101 93 86 80 76 71 68 1.7
20mm 757 517 406 346 302 272 250 232 219 204 179 161 150 136 129 123 114 108 1.5
25mm 1801 1218 976 815 719 647 594 551 514 486 429 390 351 325 306 287 273 258 0.8
32mm 3485 2333 1852 1577 1391 1252 1149 1072 996 934 824 741 681 631 585 556 522 501 0.7

LPG

Pressure Drop 0.25kPa (Pressure Supply 2.75kPa)  (MJ/h)

Length of main run in metres

Nominal
Size
2 4 6 8 10 12 14 16 18 20 25 30 35 Correction
(+ mt for fitting)
16mm 258 173 137 118 103 93 84 78 74 69 61 55 50 1.7
20mm 408 280 219 185 163 148 135 125 117 110 97 87 80 1.5
25mm 979 655 520 448 389 350 322 303 278 263 229 209 190 0.8
32mm 1882 1273 1005 855 747 673 617 573 539 505 445 402 365 0.7
Nominal
Size
40 45 50 55 60 70 80 90 100 120 140 160 Correction
(+ mt for fitting)
16mm 46 44 41 38 37 1.7
20mm 74 69 65 61 58 54 48 46 44 40 36 34 1.5
25mm 179 164 155 146 141 128 119 111 105 95 85 80 0.8
32mm 338 317 298 283 269 246 226 212 201 181 166 145 0.7
Pressure Drop 10kPa (Pressure Supply 70kPa)  (MJ/h)

Length of main run in metres

Nominal
Size
2 4 6 8 10 12 14 16 18 20 25 30 35 Correction
(+ mt for fitting)
16mm 2255 1525 1211 1021 909 810 752 683 646 609 542 483 444
20mm 3617 2421 1932 1637 1444 1294 1182 1096 1037 966 848 764 700
25mm 8538 5774 4584 3923 3409 3099 2817 2626 2436 2305 2013 1830 1661
32mm 16495 11042 8766 7578 6586 5927 5443 5048 4705 4409 3889 3500 3246
Nominal
Size
40 45 50 55 60 70 80 90 100 120 140 160 Correction
(+ mt for fitting)
16mm 411 381 357 343 325 300 275 259 241 216 201 184
20mm 659 605 573 539 515 511 441 409 383 346 318 298
25mm 1541 1465 1359 1286 1223 1135 1042 981 919 828 752 698
32mm 3019 2801 2664 2465 2397 2197 1998 1872 1773 1596 1451 1345