He aha nā mea maikaʻi o ka paipu X70 i hoʻohālikelike ʻia me ka X65?

I ka honua o ka ʻoihana pipeline, hiki i ke koho ʻana i nā mea ke hoʻopilikia nui i nā hopena o ka papahana. ʻElua mau māka maʻamau o ka paipu kila ka API 5L X70 a me X65. ʻOiai he mau kila haʻahaʻa haʻahaʻa kiʻekiʻe (HSLA) ʻelua, hāʻawi ka paipu X70 i kekahi mau pono kūʻokoʻa ma mua o kāna hoa X65. E ʻike kēia ʻatikala i nā pōmaikaʻi nui o ke koho ʻana i kahi X70 paipu, e kālele ana i kāna mau ʻano mechanical kiʻekiʻe a me nā hiʻohiʻona hana.

ʻOi aku ka ikaika o ka hua a me ka ikaika tensile

ʻO kekahi o nā pono koʻikoʻi o ka paipu X70 ʻo ia kona ikaika kiʻekiʻe a me ka ikaika tensile i hoʻohālikelike ʻia me ka X65. ʻO ka X70 paipu ke kaena nei i ka haʻahaʻa haʻahaʻa hua ikaika o 70,000 psi (483 MPa), oiai ka X65 i ka palena iki o 65,000 psi (448 MPa). ʻO kēia hoʻonui ʻana i ka ikaika hua e unuhi i kekahi mau pono kūpono:

• Hoʻonui ʻia ka pale ʻana i ke kaomi: ʻO ka ikaika kiʻekiʻe e hiki ai i nā paipu X70 ke pale aku i nā koʻikoʻi o loko me ka ʻole o ka deformation a i ʻole ka hemahema. ʻOi aku ka maikaʻi o kēia i nā ʻōnaehana pipeline kiʻekiʻe, e like me nā mea i hoʻohana ʻia i ka ʻoihana aila a me ke kinoea.
• Hoʻemi ʻia ka mānoanoa o ka pā: No ke kaomi hana i hāʻawi ʻia, hiki ke hana ʻia nā paipu X70 me nā paia lahilahi i hoʻohālikelike ʻia me nā paipu X65. ʻO kēia hoʻemi ʻana i ka mānoanoa o ka pā e alakaʻi i ka mālama waiwai nui, nā kumukūʻai haʻahaʻa haʻahaʻa, a me ka maʻalahi o ka hoʻonohonoho ʻana.
• ʻOi aku ka maikaʻi o ka pale ʻana i ka buckling: ʻO ka ikaika kiʻekiʻe o nā paipu X70 e hāʻawi ʻoi aku ka maikaʻi o ke kūʻē ʻana i ka buckling ma lalo o nā haʻahaʻa o waho, e ʻoi aku ka maikaʻi no nā noi kai waho a me ka wai hohonu kahi e hopohopo ai ke kaomi o waho.

Pēlā nō, ʻoi aku ka ikaika o ka ikaika o nā paipu X70 ma mua o nā paipu X65. ʻO ka ikaika tensile haʻahaʻa loa no X70 ma kahi o 82,000 psi (565 MPa), aʻo X65 ma kahi o 77,000 psi (531 MPa). Hāʻawi kēia ikaika tensile kiʻekiʻe i:

• Hoʻonui ʻia ka paʻa o ke kūkulu ʻana: Hiki i nā paipu X70 ke kūpaʻa maikaʻi i nā ukana axial a me nā koʻikoʻi kulou, e ʻoi aku ka paʻakikī i ka ʻāina paʻakikī a i ʻole nā ​​​​wahi hana seismically.
• Hoʻonui i ka pale ʻana i ka luhi: Hoʻopili pinepine ka ikaika tensile kiʻekiʻe me ka hoʻomaikaʻi ʻana i ka hana luhi, ʻo ia ka mea koʻikoʻi no nā pipeline i lalo i nā kūlana hoʻouka cyclic.

Haʻahaʻa Haʻawina ikaika

ʻO kekahi pōmaikaʻi nui o X70 paipu ma luna o X65 kona haʻahaʻa yield ikaika ratio (YS/TS ratio). He mea koʻikoʻi ka ratio o ka ikaika i ka hoʻolālā a me ka hana ʻana o ka pipeline, no ka mea e hoʻopili ana i ka hiki o ka paipu ke hoʻololi i ka plastically ma mua o ka pau ʻole. ʻO ka lakio haʻahaʻa haʻahaʻa i makemake ʻia no nā kumu he nui:

• ʻOi aku ka maikaʻi o ka ductility: Hōʻike pinepine nā paipu X70 i ka ductility maikaʻi ma mua o nā paipu X65. ʻO kēia ductility i hoʻonui ʻia e ʻae i ka hoʻololi ʻana o ka plastic ma mua o ka hāʻule ʻana, ʻo ia ka mea koʻikoʻi i nā wahi e pili ana i ka neʻe ʻana o ka honua a i ʻole ka hana seismic.
• Hoʻonui i ka mana hoʻoikaika: ʻO ka ratio ikaika haʻahaʻa haʻahaʻa o nā paipu X70 e hāʻawi i ka hiki ke kiʻekiʻe. 'O ia ho'i, hiki i ka paipu ke komo i ka ikehu hou a'e i ka deformation ko'iko'i me ka haki 'ole, e hā'awi ana i kahi palena palekana hou i nā kūlana ho'ouka ko'iko'i.
• ʻOi aku ka maikaʻi o nā waiwai paʻa paʻa: Inā hiki ʻole ke hoʻomaka ʻia ka māwae, hiki i ka lakio ikaika haʻahaʻa haʻahaʻa o nā paipu X70 ke kōkua i ka hopu ʻana i ka hoʻolaha ʻana ma mua o nā paipu X65. He mea koʻikoʻi kēia waiwai no ka mālama ʻana i ka pololei o ka pipeline a me ka pale ʻana i nā hemahema pōʻino.

ʻO ka hoʻomaikaʻi ʻana i ka ductility a me ka hiki ke hoʻopaʻa ʻia o X70 e kūpono loa iā lākou no nā ala hoʻolālā e pili ana i ka strain-based, ʻoi aku ka nui o ka mea nui i nā kaiapuni paʻakikī e like me nā wahi permafrost a i ʻole nā ​​​​wahi me nā kūlana lepo paʻa ʻole.

ʻOi aku ka ʻoi aku o ka paʻakikī haʻahaʻa haʻahaʻa

Hōʻike pinepine nā paipu X70 i ka paʻakikī o ka hopena haʻahaʻa haʻahaʻa ma mua o nā paipu X65. He mea koʻikoʻi kēia waiwai no nā pipeline e hana ana i ke anuanu a i ʻole i hoʻopaʻa ʻia i ka decompression kinoea wikiwiki. ʻO ka paʻakikī haʻahaʻa haʻahaʻa haʻahaʻa o nā paipu e hāʻawi i nā pono he nui:

• Hoʻomaikaʻi ʻia ka pale ʻana i ka haʻihaʻi: ʻAʻole maʻalahi nā paipu X70 i ka haki ʻana i nā haʻahaʻa haʻahaʻa, e ʻoi aku ka hilinaʻi iā lākou i nā wahi anuanu. He mea koʻikoʻi kēia no nā pipeline ma nā ʻāpana arctic a i ʻole sub-arctic.
• Hoʻonui i ka palekana ma nā noi cryogenic: No nā paipu e lawe ana i ke kinoea kūlohelohe wai wai (LNG) a i ʻole nā ​​wai cryogenic ʻē aʻe, ʻo ka ʻoi aku ka haʻahaʻa haʻahaʻa haʻahaʻa e hāʻawi i kahi palena palekana hou aʻe e kūʻē i nā hemahema brittle.
• ʻOi aku ka maikaʻi o ka pale ʻana i ka hoʻololi ductile-to-brittle: X70 paipu ʻO ka maʻamau he haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa haʻahaʻa hoʻololi hoʻololi i ka hoʻohālikelike ʻana i nā paipu X65. ʻO ia ke ʻano o ka mālama ʻana i kā lākou ʻano ductile ma luna o kahi ākea ākea ākea, e hoʻonui ai i ka palekana pipeline holoʻokoʻa a me ka hilinaʻi.

Loaʻa ka paʻakikī haʻahaʻa haʻahaʻa i hoʻomaikaʻi ʻia ma o ka mālama pono ʻana i ka microstructure o ke kila a me ka haku mele. Hoʻohana pinepine ʻia nā ʻenehana thermomechanical controlled processing (TMCP) no ka hoʻopaʻa ʻana i ke ʻano o ka palaoa a me ka hāʻawi ʻana i nā mea hoʻohuihui, e hopena i kahi microstructure maikaʻi me nā waiwai paʻakikī maikaʻi loa.

Ma kahi o kēia mau pono mua, hāʻawi pū nā paipu X70 i nā pono ʻē aʻe ma luna o nā paipu X65:

• ʻOi aku ka maikaʻi o ka weldability: ʻOiai ko lākou ikaika kiʻekiʻe, hōʻike pinepine nā paipu X70 i ka maikaʻi maikaʻi loa ma muli o ko lākou haʻahaʻa haʻahaʻa carbon equivalent value (CEV). He mea maʻalahi kēia i ka hoʻoheheʻe ʻana i ke kahua a hoʻemi i ka pilikia o nā hemahema pili i ka weld.
• Hoʻonui i ka pale ʻino: Hiki i ka microstructure i hoʻomalu ʻia ke kōkua i ka hoʻomaikaʻi ʻana i ke kūʻē ʻana i nā ʻano ʻino like ʻole, e komo pū ana me ka hāhā ʻana i ka hydrogen-induced (HIC) a me ka pohā corrosion stress (SCC).
• ʻOi aku ka maʻalahi o ka hoʻolālā ʻana: ʻO ka ʻoihana mīkini ʻoi aku ka maʻalahi o ka ʻenekinia i ka hoʻolālā pipeline, hiki ke hiki i ka lōʻihi o ka lōʻihi, hoʻemi ʻia nā koi kākoʻo, a i ʻole nā ​​koho ala paʻakikī.

Hui Longma

ʻOiai ke hāʻawi nei nā paipu X70 i nā pono he nui ma mua o nā paipu X65, he mea nui e hoʻomaopopo i ke koho ʻana ma waena o kēia mau māka e hoʻokumu ʻia i nā koi o ka papahana, nā kūlana hana, a me nā noʻonoʻo waiwai. Pono e noʻonoʻo ʻia nā mea e like me ka loaʻa ʻana o ka waiwai, ke kumukūʻai, a me ka ʻike kūloko i ka lawelawe ʻana i nā kila kiʻekiʻe.

Inā ʻoe e noʻonoʻo nei API 5L X70 Paipu no kāu papahana aʻe, mai hoʻokaʻulua e hoʻokaʻaʻike aku i kā mākou hui loea ma info@longma-group.com. Eia mākou e kōkua iā ʻoe e hana i ka koho maikaʻi loa no kāu mau pono kikoʻī a hōʻoia i ka holomua o kāu papahana pipeline.