Nūhou - Nā hiʻohiʻona o ka paipu kila maʻemaʻe, hana, a me ke alakaʻi kūʻai ʻana

I ka ʻoihana paipu a me nā noi hoʻolālā,paipu kila ʻolenoho i kahi kūlana koʻikoʻi ma muli o ko lākou mau pono kūikawā. ʻO kā lākou ʻokoʻa mai nā paipu welded a me kā lākou mau hiʻohiʻona koʻikoʻi i ke koho ʻana i ka paipu kūpono.

Hāʻawi nā paipu kila ʻole i nā pono kumu nui ma mua o nā paipu welded. Hana ʻia nā paipu weld e ka hui ʻana i nā papa kila, e loaʻa ai ka weld seams. Hoʻopili maoli kēia i ko lākou pale ʻana i ke kaomi a hiki ke alakaʻi i ka leakage ma lalo o ke kiʻekiʻe-mehana a me nā kūlana kiʻekiʻe ma muli o ke koʻikoʻi koʻikoʻi ma nā hili. ʻO nā paipu kila ʻole, ma ka ʻaoʻao ʻē aʻe, ua hana ʻia ma o ke kaʻina hana ʻōwili hoʻokahi, e hoʻopau ana i nā hili. Hiki iā lākou ke kū'ē i nā kaomi a me nā mahana kiʻekiʻe, e hilinaʻi nui iā lākou i nā noi e like me ka laweʻana i kaʻaila a me ke kinoea a me nā paila kiʻekiʻe. Eia kekahi, hāʻawi nā paipu kila liʻiliʻi i ka like ʻana o ka mānoanoa o ka pā, e hoʻopau ana i nā ʻano like ʻole o ka mānoanoa o ka paia i hoʻokumu ʻia e ka wili, hoʻomaikaʻi i ka paʻa o ke kūkulu ʻana, a me ka hāʻawi ʻana i ka pale ʻana i ka corrosion. ʻOi aku ka lōʻihi o ko lākou ola lawelawe ma mua o 30% ma mua o nā paipu welded.

Ke Kaʻina Hana Hana ʻAi ʻAi ʻAi ʻAi

ʻO ke kaʻina hana no nā paipu kila maʻemaʻe he paʻakikī a paʻakikī, e pili ana i ka ʻōwili wela a me ke kaha kiʻi anu. Hoʻomaʻamaʻa ke kaʻina hana ʻōwili wela i kahi billet kila paʻa a hiki i ka 1200°C, a laila e ʻōwili iā ia ma o ka wili wili i loko o kahi paipu puka. A laila, hele ka paipu i loko o kahi wili nui e hoʻoponopono i ke anawaena a me kahi wili hoʻemi e hoʻomalu i ka mānoanoa o ka pā. ʻO ka hope loa, hoʻomaʻamaʻa, hoʻopololei, a ʻike hewa. Ke hoʻohana nei ke kaʻina hana anu i ka paipu wela e like me ka mea maka. Ma hope o ka ʻohi ʻana no ka wehe ʻana i ka unahi oxide, huki ʻia ia i ke ʻano me ka wili anu. A laila koi ʻia ka Annealing e hoʻopau i nā koʻikoʻi o loko, a ma hope o ka hoʻopau ʻana a me ka nānā ʻana. ʻO nā kaʻina hana ʻelua, ʻoi aku ka maikaʻi o nā paipu wela wela no nā anawaena nui a me nā paia mānoanoa, ʻoiai ʻoi aku ka maikaʻi o nā paipu huki anu no nā anawaena liʻiliʻi a me nā noi kikoʻī kiʻekiʻe.

Mea maʻamau

Loaʻa i nā paipu kila maʻemaʻe ʻole nā māka maʻamau o ka home a me ka honua no ka hoʻokō ʻana i nā pono like ʻole.

ʻO ke kila kalapona a me ke kila kila ka waiwai o ka hale.
20# kila, ka mea maʻamau i hoʻohana ʻia i ke kila kalapona, hāʻawi i ka plasticity maikaʻi loa a me ka maʻalahi o ka hana ʻana, e hoʻohana nui ʻia i nā pipeline maʻamau.
Hāʻawi ka 45 # kila i ka ikaika kiʻekiʻe a kūpono i nā ʻāpana hana mechanical. Ma waena o nā paipu kila kila, kū'ē ke kila 15CrMo i nā wela kiʻekiʻe a me nā kolo, e hoʻolilo iā ia i mea kumu no nā paila mea kanu.

304 stainless steel seamless paipu, ma muli o kona kūpaʻa maikaʻi ʻana i ka corrosion, ua makemake nui ʻia i nā ʻoihana kemika a me nā meaʻai.

Hoʻohana nui ʻia nā mea maʻamau o ka honua:

Wahi a ka US ASTM maʻamau,A106-B carbon steel paipu ʻolehe koho maʻamau no ka lawe ʻana i ka aila a me ke kinoea maoli. ʻO kona ikaika tensile hiki i 415-550 MPa a hiki ke kū i nā mahana hana mai -29 ° C a 454 ° C.

ʻO A335-P91 paipu hao, mahalo i kāna haku mele chromium-molybdenum-vanadium, hāʻawi maikaʻi loa i ka ikaika wela kiʻekiʻe a me ka pale ʻana i ka oxidation, e hoʻohana mau ʻia i ka paipu mahu nui o nā boilers mana supercritical.

E like me ka European EN standard, P235GH carbon steel mai ka EN 10216-2 series he mea kūpono ia no nā paila haʻahaʻa a haʻahaʻa a me nā moku kaomi.

ʻOi aku ka P92 alloy pipe ma mua o P91 i ka ikaika hoʻomanawanui wela a ʻo ia ke koho i makemake ʻia no nā papahana mana wela nui. Hāʻawi ka JIS-standard STPG370 carbon pipe i ke kumukūʻai kiʻekiʻe a hoʻohana nui ʻia i ka paipu ʻoihana maʻamau.
SUS316L paipu kila kila, e pili ana i ka 304 stainless steel, hoʻohui i ka molybdenum e hoʻomaikaʻi nui i kona kūʻē ʻana i ka chloride ion corrosion, kūpono ia no ka ʻenekinia moana a me ka waikawa kemika a me ka halihali alkali.

Ma ke ʻano o ka nui, ʻo nā paipu kila maʻemaʻe ʻole i ka anawaena o waho mai 10mm a 630mm, me ka mānoanoa o ka paia mai 1mm a 70mm.
Ma ka ʻenehana maʻamau, hoʻohana pinepine ʻia nā anawaena o waho o 15mm a 108mm a me nā mānoanoa pā o 2mm a 10mm.
No ka laʻana, hoʻohana pinepine ʻia nā paipu me ka anawaena o waho o 25mm a me ka mānoanoa pā o 3mm i nā ʻōnaehana hydraulic, aʻo nā paipu me ka anawaena o waho o 89mm a me ka mānoanoa pā o 6mm kūpono no ka lawe ʻana i ka media kemika.

Nā kikoʻī no ke kūʻai ʻana i nā paipu kila ʻole

ʻO ka mea mua, e hōʻoia i ka palapala hōʻoia no ka hōʻoia ʻana i ka hoʻohui ʻana i nā kemika a me nā waiwai mechanical e hoʻokō i nā koi hoʻolālā. No ka laʻana, ʻaʻole i emi iho ka ikaika o ka 20 # kila ma mua o 245 MPa, a ʻo ka ikaika o ka ASTM A106-B he ≥240 MPa.

ʻO ka lua, e nānā i ka maikaʻi o ka helehelena. Pono ka ʻili i nā hemahema e like me nā māwae a me nā pā, a pono e hoʻomalu ʻia ka neʻe ʻana o ka mānoanoa o ka pā i loko o ± 10%.

Eia kekahi, koho i nā huahana me nā kaʻina hana a me nā mea kūpono e pili ana i ke ʻano o ka noi. ʻO nā paipu wela a me nā mea hoʻoheheʻe ʻia e like me A335-P91 ʻoi aku ka maikaʻi no nā kaiapuni kiʻekiʻe, ʻoiai ʻo nā paipu huki anu i ʻōlelo ʻia no ka mea kani pololei. Paipai ʻia nā paipu kila kila SUS316L no nā wahi kai a i ʻole ka ʻino nui.

ʻO ka hope, e noi i ka mea hoʻolako e hāʻawi i kahi hōʻike ʻike hewa, e kālele ana i ka ʻike ʻana i nā hemahema o loko huna e pale aku i nā pilikia maikaʻi e hiki ke hoʻopilikia i ka palekana o ka papahana.

Hoʻopau kēia i ke kūkākūkā no kēia kumuhana. Inā makemake ʻoe e aʻo hou aʻe e pili ana i nā paipu kila maʻemaʻe, e ʻoluʻolu e kelepona mai iā mākou ma o kēia mau ʻano a e hauʻoli kā mākou hui kūʻai ʻoihana e kōkua iā ʻoe.