Ngā paipa maitai waro tuitui-hurihuri ASTM A139 Tau A, B, C
Āhuatanga Mīhini
| Taumata A | Taumata B | Tau C | Tau D | Tau E | |
| Kaha tuku, min, Mpa(KSI) | 330(48) | 415(60) | 415(60) | 415(60) | 445(66) |
| Kaha kume, min, Mpa(KSI) | 205(30) | 240(35) | 290(42) | 315(46) | 360(52) |
Te Hanganga Matū
| Huānga | Te Hanganga, Teitei, % | ||||
| Taumata A | Taumata B | Tau C | Tau D | Tau E | |
| Waro | 0.25 | 0.26 | 0.28 | 0.30 | 0.30 |
| Manganēhi | 1.00 | 1.00 | 1.20 | 1.30 | 1.40 |
| Whēkau | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 |
| Whāriki | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 |
Whakamātautau Waipūmau
Me whakamātautau ia roa o te paipa e te kaihanga ki te pēhanga wai-pūmau ka puta he ahotea i roto i te pakitara o te paipa kāore i raro iho i te 60% o te kaha tuku iti rawa kua tohua i te pāmahana rūma. Me whakatau te pēhanga mā te whārite e whai ake nei:
P=2St/D
Ngā Rerekētanga e Whakaaetia ana i roto i ngā Taumaha me ngā Ahu
Me paunatia motuhake ia roa o te paipa, kaua hoki tōna taumaha e neke atu i te 10% neke atu i tōna taumaha matapae, 5.5% rānei i raro iho i tōna taumaha matapae, e tatauhia ana mā te whakamahi i tōna roa me tōna taumaha mō ia wae roa.
Kaua te whānui o waho e neke atu i te ±1% mai i te whānui o waho kua tohua.
Kaua te matotoru o te pakitara i tētahi wāhi e neke ake i te 12.5% i raro i te matotoru pakitara kua tohua.
Roa
Roa matapōkere takitahi: 16 ki te 25 putu (4.88 ki te 7.62m)
Roa matapōkere takirua: neke atu i te 25 putu ki te 35 putu (7.62 ki te 10.67m)
Ngā roa ōrite: te rerekētanga e whakaaetia ana ±1inihi
Ngā mutunga
Me whakapaipai ngā puranga paipa ki ngā pito papatahi, ā, me tango ngā kōhao i ngā pito.
Ina tohua te pito paipa hei pito piko, me 30 ki te 35 nekehanga te koki
