Helical-seam carbon steel pipes ASTM A139 Grade A, B, C
Waiwai Mechanical
| Papa A | Papa B | Papa C | Papa D | Papa E | |
| Ka ikaika hua, min, Mpa(KSI) | 330(48) | 415(60) | 415(60) | 415(60) | 445(66) |
| Ka ikaika uʻi, min, Mpa(KSI) | 205(30) | 240(35) | 290(42) | 315(46) | 360(52) |
Hoʻohui Kimia
| ʻElemu | Huina, Max, % | ||||
| Papa A | Papa B | Papa C | Papa D | Papa E | |
| Kalapona | 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 |
Hoʻāʻo Hydrostatic
E ho'āʻo ʻia kēlā me kēia lōʻihi o ka paipu e ka mea hana i kahi kaomi hydrostatic e hoʻopuka ai i loko o ka pā paipu i ke koʻikoʻi ʻaʻole i emi iho ma mua o 60% o ka ikaika hua haʻahaʻa i ʻōlelo ʻia ma ka lumi wela.E hoʻoholo ʻia ke kaomi e ka hoohalike penei:
P=2St/D
ʻAe ʻia nā ʻano like ʻole i nā kaumaha a me nā ana
Pono e kaupaona ʻia kēlā me kēia lōʻihi o ka paipu a ʻaʻole e ʻokoʻa kona kaumaha ma mua o 10% a i ʻole 5.5% ma lalo o kona kaumaha kumu, i helu ʻia me kona lōʻihi a me kona kaumaha o kēlā me kēia lōʻihi.
ʻAʻole e ʻokoʻa ke anawaena o waho ma mua o ±1% mai ka anawaena waho i koho ʻia.
ʻAʻole ʻoi aku ka mānoanoa o ka pā ma kēlā me kēia wahi ma mua o 12.5% ma lalo o ka mānoanoa pā i kuhikuhi ʻia.
Ka lōʻihi
Nā lōʻihi like ʻole: 16 a 25ft(4.88 a 7.62m)
ʻElua mau lōʻihi like ʻole: ma luna o 25ft a 35ft(7.62 a 10.67m)
Nā lōʻihi like ʻole: ʻae ʻia ka hoʻololi ʻana ±1in
Hoʻopau
E hoʻolako ʻia nā puʻu paipu me nā wēlau maʻamau, a e hoʻoneʻe ʻia nā pahu ma nā wēlau
Ke pau ka hopena o ka paipu i ʻōlelo ʻia he bevel, ʻo ka huina o 30 a 35 degere
