I ka wā e pili ana i nā ʻōnaehana paipu ʻoihana, ʻo ke koho ʻana i ka mea kūpono he mea koʻikoʻi no ka hōʻoia ʻana i ka palekana, ka pono, a me ka lōʻihi. ʻElua mau maʻamau maʻamau i ka ʻoihana ʻo ASTM A333 a ASTM A671. ʻOiai hoʻohana ʻia nā mea ʻelua no ka hana paipu, loaʻa iā lākou nā hiʻohiʻona a me nā noi. Ma kēia alakaʻi holoʻokoʻa, e ʻimi mākou i nā ʻokoʻa koʻikoʻi ma waena o A333 a me A671, e kālele ana i kā lākou haku mele ʻana, nā waiwai mechanical, a me ka hana ma nā noi like ʻole.
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Pehea ka ʻokoʻa o nā haku mele A333 a me A671?
He kuleana koʻikoʻi ke ʻano kemika o kahi mea paipu i ka hoʻoholo ʻana i kāna mau waiwai a me kāna hana. E nānā kākou pehea ka ʻokoʻa o A333 a me A671 i kēia ʻano:
ASTM A333:
ʻO ASTM A333 kahi kikoʻī maʻamau no ka paipu kila ʻole a welded no ka lawelawe haʻahaʻa haʻahaʻa a me nā noi ʻē aʻe e koi ana i ka paʻakikī notch. ʻOkoʻa ka haku mele ʻana o A333 ma muli o ka papa, akā e komo pū me:
- Kalapona: 0.30% ka nui
- Manganese: 0.40-1.06%
- Phosphorus: 0.025% ka nui
- Sulfur: 0.025% ka nui
- Silikino: 0.10-0.50%
- Nickel: A hiki i 3.5% (no kekahi mau māka)
ASTM A671:
Uhi ʻo ASTM A671 i ka paipu kila uila-fusion-welded no ka lewa a me nā mahana haʻahaʻa. ʻO ka hui kemika o A671 paipu pili i ka papa akā maʻamau ka:
- Kalapona: 0.12-0.31% (ʻokoʻa ma ka papa)
- Manganese: 0.29-1.06%
- Phosphorus: 0.035% ka nui
- Sulfur: 0.035% ka nui
- Silikino: 0.15-0.40%
Aia ka ʻokoʻa koʻikoʻi o ka haku mele ʻana i ke kalapona a me ka hiki ʻana o ka nickel i kekahi mau māka A333. Loaʻa i nā paipu A333 ka maʻi kalapona kiʻekiʻe, e kōkua ana i ko lākou ikaika a paʻakikī i nā wela haʻahaʻa. ʻO ka hoʻohui ʻana o ka nickel i kekahi mau māka A333 e hoʻonui i kā lākou hana haʻahaʻa haʻahaʻa.
Ma ka ʻaoʻao ʻē aʻe, ʻoi aku ka nui o nā paipu A671 i ka ʻike kalapona ma muli o ka papa, e ʻae ana i ka versatility i nā noi. ʻO ka loaʻa ʻole o ka nickel i loko o nā paipu A671 e ʻoi aku ka maikaʻi o ka hoʻohana ʻana i ka hana maʻamau kahi i koi ʻole ʻia ka hana haʻahaʻa haʻahaʻa.
He aha nā ʻokoʻa waiwai mechanical ma waena o A333 a me A671?
He mea koʻikoʻi nā waiwai mechanical o nā paipu i ka hoʻoholo ʻana i ko lākou kūpono no nā noi kikoʻī. E hoʻohālikelike kākou i nā waiwai mechanical o nā paipu A333 a me A671.
ASTM A333:
- Ka ikaika ʻo Tensile: 415-585 MPa (60-85 ksi), ma muli o ka papa.
- Ka ikaika o ka hua: 205-415 MPa (30-60 ksi), ma muli o ka papa
- Elongation: 16-30% ka liʻiliʻi ma 50 mm (2 iniha)
- Impact Test: Pono i nā mahana haʻahaʻa i kuhikuhi ʻia
ASTM A671:
- Ka ikaika ʻo Tensile: 415-585 MPa (60-85 ksi), ma muli o ka papa.
- Ka ikaika o ka hua: 205-415 MPa (30-60 ksi), ma muli o ka papa
- Elongation: 16-22% ka liʻiliʻi ma 50 mm (2 iniha)
- Impact Test: ʻAʻole koi ʻia i nā manawa a pau, pili i ka papa
ʻOiai ua like nā pae ikaika tensile a me ka hāʻawi ʻana i nā pae ʻelua, aia nā ʻokoʻa nui:
- Hana Haʻahaʻa Haʻahaʻa: Hoʻolālā ʻia nā paipu A333 no ka lawelawe haʻahaʻa haʻahaʻa a koi ʻia e hana i nā hoʻokolohua hopena ma nā haʻahaʻa haʻahaʻa i kuhikuhi ʻia. Mālama kēia i ko lākou paʻakikī a me ka hilinaʻi i nā noi cryogenic. A671 paipu, ʻoiai kūpono no nā haʻahaʻa haʻahaʻa, ʻaʻole paha ka pae like o ka hana haʻahaʻa haʻahaʻa i hōʻoia ʻia ma nā papa āpau.
- Elongation: Loaʻa nā paipu A333 i nā koi elongation kiʻekiʻe, e hōʻike ana i ka ductility maikaʻi a me ka formability. He mea maikaʻi kēia i nā noi kahi e hoʻokau ʻia ai ka paipu i nā hana kulou a hoʻokumu ʻana paha.
- Ka Ho'āʻo Impact: ʻOiai koi ʻia ka hoʻāʻo ʻana i ka hopena no nā paipu A333, ʻaʻole pono ia no nā paipu A671. ʻO nā koi kiko'ī e pili ana i ka papa o ka paipu A671 i hoʻohana ʻia. Hōʻike kēia ʻokoʻa i ka hoʻohana manaʻo ʻia o kēlā me kēia maʻamau, me ka A333 i ʻoi aku ka nānā ʻana i nā noi haʻahaʻa haʻahaʻa kahi koʻikoʻi ka pale ʻana i ka hopena.
Hōʻike kēia mau ʻokoʻa waiwai mechanical i ke ʻano kūikawā o nā paipu A333 no ka lawelawe haʻahaʻa haʻahaʻa, ʻoiai ʻo nā paipu A671 e hāʻawi i ka maʻalahi no ka nui o nā noi wela.
Pehea e hoʻohālikelike ai ʻo A333 a me A671 ma ke ʻano o ka noi a me ka hana?
Hoʻopili ʻia ka noi a me nā hiʻohiʻona hana o nā paipu A333 a me A671 e kā lākou mea hana kemika a me nā waiwai mechanical. E ʻimi kākou pehea e hoʻohālikelike ai kēia mau maʻamau ma nā ʻano like ʻole:
1. Kaulana Mahana:
- A333: Hoʻolālā kikoʻī ʻia no ka lawelawe haʻahaʻa haʻahaʻa, kūpono no nā mahana haʻahaʻa haʻahaʻa e like me -195°C (-320°F) ma muli o ka papa.
- A671: He kūpono no ka lewa a me ka wela haʻahaʻa, akā ʻaʻole i hoʻohana maʻamau no nā noi cryogenic koʻikoʻi.
2. Nā noi ʻoihana:
- A333: Hoʻohana maʻamau ʻia i nā mea kanu hana cryogenic, liquefied natural gas (LNG), a me nā kaʻina hana haʻahaʻa haʻahaʻa.
- A671: Hoʻohana nui ʻia i ka paipu ʻoihana maʻamau, nā mea kanu petrochemical, a me nā noi wela haʻahaʻa.
3. Welding a hana:
- A333: Pono i nā kaʻina hana wiliwili e mālama i ka paʻakikī haʻahaʻa haʻahaʻa. Pono paha ka hoʻomaʻamaʻa ʻana i ka wela ma mua a ma hope o ka weld no kekahi mau māka.
- A671: Maʻalahi ka wili a me ka hana ʻana ma muli o ka haʻahaʻa haʻahaʻa o ke kalapona i ka hapa nui. ʻO ke kaʻina hana uila-fusion-weld e hōʻoia i ka maikaʻi o ka weld.
4. Kū'ē kū'ē:
- A333: Hāʻawi maikaʻi i ka pale ʻana i ka corrosion, ʻoi aku hoʻi ma nā wahi wela haʻahaʻa. Aia kekahi mau māka i ka nickel, hiki ke hoʻoikaika i ka pale ʻana i ka corrosion.
- A671: Hāʻawi i ka pale ʻana i ka corrosion kūpono no nā noi ʻoihana he nui akā makemake paha i nā ana hou (e like me ka uhi ʻana) ma nā wahi ʻino loa.
5. Ke kumu kūʻai a me ka loaʻa:
- A333: ʻOi aku ka nui o ke kumukūʻai ma muli o nā waiwai haʻahaʻa haʻahaʻa kūikawā a me nā mea hoʻohui ʻē aʻe i kekahi mau papa.
- A671: ʻoi aku ka maikaʻi o ke kumu kūʻai a loaʻa koke no nā noi ʻoihana maʻamau.
6. Paʻi Paʻi:
- A333: Loaʻa i nā mānoanoa pā like ʻole e hoʻokō i kahi ākea o nā koi koi i nā lawelawe haʻahaʻa haʻahaʻa.
- A671: Hāʻawi i ka maʻalahi i nā helu kaomi, me nā papa like ʻole (e like me ka Papa 12, 22, 32, a me nā mea ʻē aʻe) e hāʻawi ana i nā koho no nā kaomi hana like ʻole.
Ke koho nei ma waena o A333 a A671 paipu, pono e noʻonoʻo i nā koi kikoʻī o kāu noi. No nā lawelawe haʻahaʻa haʻahaʻa loa a i ʻole he koʻikoʻi ka paʻakikī notch, ʻo nā paipu A333 ke koho i makemake ʻia. ʻO kā lākou haku mele kūikawā a me ka hoʻāʻo koʻikoʻi e hōʻoia i ka hilinaʻi i nā kaiapuni cryogenic.
Ma ka ʻaoʻao ʻē aʻe, hāʻawi nā paipu ASTM A671 i kahi hopena versatile no kahi ākea o nā noi ʻoihana. Hāʻawi kā lākou hana uila-fusion-welded i ka maikaʻi weld maikaʻi loa a me ke kūlike, e kūpono ana iā lākou no nā lawelawe wela a me nā haʻahaʻa haʻahaʻa.
Pono e hoʻomaopopo ʻia ʻoiai ʻaʻole hoʻohana maʻamau nā paipu A671 i nā noi cryogenic koʻikoʻi, hiki iā lākou ke koho maikaʻi loa no nā lawelawe haʻahaʻa haʻahaʻa haʻahaʻa. ʻO nā māka CC60, CC65, a me CC70 o nā paipu A671, ʻoi aku, hāʻawi i nā waiwai mechanical i hoʻonui ʻia i kūpono iā lākou no nā kaiapuni ʻoihana paʻakikī.
Hoʻokaʻaʻike Information
I ka hopena, ʻoiai ke hāʻawi nei nā kūlana ʻelua ʻo ASTM A333 a me A671 i nā ʻōnaehana paipu kiʻekiʻe, lawelawe lākou i nā kumu like ʻole i ka ʻāina ʻoihana. ʻOi aku ka maikaʻi o A333 i nā noi haʻahaʻa haʻahaʻa, e hāʻawi ana i ka paʻakikī a me ka hilinaʻi i nā kaiapuni cryogenic. Hāʻawi ʻo A671, me kāna mau māka maʻamau a me ka hana uila-fusion-welded, hāʻawi i kahi hopena paʻa no ka nui o nā noi ʻoihana.
I ke koho ʻana ma waena o kēia mau maʻamau ʻelua, he mea koʻikoʻi e noʻonoʻo i nā mea e like me ka mahana hana, nā koi koi, nā pono pale corrosion, a me nā kikoʻī o ka papahana holoʻokoʻa. Ma ka hoʻomaopopo ʻana i nā hiʻohiʻona kūʻokoʻa o kēlā me kēia maʻamau, hiki iā ʻoe ke hoʻoholo i ka ʻike e hōʻoiaʻiʻo ai i ka palekana, kūpono, a me ka lōʻihi o kāu ʻōnaehana paipu.
Inā ʻoe e ʻimi nei i ke kūlana kiʻekiʻe Nā paipu ASTM A671 no kāu mau pono ʻoihana, hāʻawi ʻo Longma Group i kahi ākea ākea o nā koho. Hoʻolālā ʻia kā mākou mau paipu papa CC60, CC65, a me CC70 e hoʻokō i nā koi koi ʻoihana. Me nā anawaena o waho mai 457.2mm a 1422mm a me nā mānoanoa mai 7.92mm a 50.8mm, loaʻa iā mākou ka versatility e kūpono i nā noi like ʻole. Inā ʻoe i ke kūkulu ʻana, ka aila a me ke kinoea, a i ʻole nā ʻoihana ʻē aʻe e koi ana i nā hoʻonā paipu ikaika, ua uhi ʻo Longma iā ʻoe. Mai poina i ka manawa e hoʻonui ai i kāu mau papahana me kā mākou huahana kiʻekiʻe. E kelepona mai iā mākou i kēia lā ma info@longma-group.com, a e kūkulu pū kākou i ka wā e hiki mai ana.
