Helical-kabu carbon karfe bututu ASTM A139 Grade A, B, C
Kayan Injiniya
| Darasi A | Darasi B | Darasi C | Darasi D | Darasi E | |
| Ƙarfin Haɓaka, min, Mpa(KSI) | 330 (48) | 415(60) | 415(60) | 415(60) | 445(66) |
| Ƙarfin ɗamara, min, Mpa(KSI) | 205 (30) | 240 (35) | 290(42) | 315 (46) | 360(52) |
Haɗin Sinadari
| Abun ciki | Haɗin kai, Max, % | ||||
| Darasi A | Darasi B | Darasi C | Darasi D | Darasi E | |
| Carbon | 0.25 | 0.26 | 0.28 | 0.30 | 0.30 |
| Manganese | 1.00 | 1.00 | 1.20 | 1.30 | 1.40 |
| Phosphorus | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 |
| Sulfur | 0.035 | 0.035 | 0.035 | 0.035 | 0.035 |
Gwajin Hydrostatic
Kowane tsayin bututu za a gwada shi ta hanyar masana'anta zuwa matsa lamba na hydrostatic wanda zai haifar a cikin bangon bututun damuwa na bai kasa da 60% na ƙayyadaddun ƙarfin yawan amfanin ƙasa a cikin ɗaki ba.Za a ƙayyade matsi ta hanyar ma'auni mai zuwa:
P=2St/D
Bambance-bambancen da aka halatta a Nauyi da Girma
Kowane tsayin bututu za a auna shi daban kuma nauyinsa ba zai bambanta fiye da 10% akan ko 5.5% a ƙarƙashin nauyin ka'idarsa ba, ana ƙididdige shi ta amfani da tsayinsa da nauyinsa kowane tsayin raka'a.
Diamita na waje bazai bambanta fiye da ± 1% daga ƙayyadadden diamita na waje ba.
Kaurin bango a kowane wuri kada ya wuce 12.5% ƙarƙashin ƙayyadadden kauri na bango.
Tsawon
Tsawon bazuwar guda ɗaya: 16 zuwa 25ft(4.88 zuwa 7.62m)
Tsawon bazuwar sau biyu: sama da 25ft zuwa 35ft(7.62 zuwa 10.67m)
Tsawon Uniform: halattaccen bambancin ±1in
Ƙarshe
Za a samar da tulin bututu tare da filaye masu kyau, kuma za a cire burbushin da ke iyakar
Lokacin da bututun da aka ƙayyade ya zama bevel ya ƙare, kwana zai zama digiri 30 zuwa 35
