Hoʻoponopono nā mea pono Monel i hoʻokahi pilikia pilikia e kū nei i kēlā me kēia lā: hiki ʻole i ka corrosion i nā kaiapuni koʻikoʻi. ʻO ka wai kai, ke kinoea ʻawaʻawa, nā kahawai kaʻina waiʻawaʻawa—nau lākou a pau i nā kila kuhili ʻole. Ua ʻike mākou i ka haki ʻana o nā flanges ma hope o 18 mau mahina i loko o nā manifold hydraulic waho. Ua hoʻololi mākou i nā mea hoʻololi i hoʻopaʻa ʻia ʻo Monel 400 i ʻelua manawa i loko o kahi mea kanu desalination retrofit no ka mea ua hoʻololi ka mea hoʻolako kumu iā UNS N04400 me kahi hui nickel-copper haʻahaʻa loa i nele i ka annealing kūpono. ʻO ia ke kumu ʻaʻole ʻo "monel fitting" he huaʻōlelo huli wale nō - he kikoʻī e lawe ana i ke kaumaha.
No ke aha i kū kaʻawale ai ʻo Monel—ʻaʻole wale i kahi hui nikela ʻē aʻe
ʻO nā huila Monel—ʻo ia hoʻi ʻo Monel 400 a me Monel K-500—he mau binaries nickel-copper me 63–70% nickel, 20–34% keleawe, a me ka hao hao, manganese, a me ke silika. ʻO ko lākou kū'ēʻana mai kahi papa oxide ho'ōla pono'ī,ʻaʻole chromium e like me nā kila kila. 'O ia ho'i ke kū'ē nei lākou i ka lua, ka po'i po'i ko'iko'i, a me ka erosion-corrosion kahi i pau koke ai ka 316 stainless. I ka hoʻāʻo ʻana i ka honua maoli ma waena o kā mākou mea kūʻai aku, ua lōʻihi ka 4.2x o nā mea pono ʻo Monel 400 ma mua o 316 SS i loko o nā poloka hoʻokele wai hoʻoheheʻe brine-saturated. Hoʻohui ʻo Monel K-500 i ka alumini a me ka titanium no ka hoʻopaʻapaʻa ʻana i ka ua - kūpono no nā hui kiʻekiʻe-torque a i ʻole nā pūnaewele o lalo o ka moana e pono ai ka ikaika a me ka pale ʻana i ka hoʻouka kaua ʻana o ke kai.
Akā ʻaʻole hōʻoia ka pae waiwai wale nō i ka hana. Ua ana mākou a hiki i ka 12% o ka hoʻololi ʻana i ke kūpaʻa ʻino maoli ma waena o nā mea pono Monel i hoʻokumu ʻia mai nā wili like ʻole-ʻoiai i ka wā i hōʻoia ʻia iā ASTM B164 a i ʻole ASME SB-164. ʻO ka ʻokoʻa? ʻO ke kūlike o ka mālama wela a me ka hoʻopau ʻana i ka ʻili hope. ʻO ka Monel 400 i hoʻopili pono ʻia i ka hoʻonā kūpono, ʻohi ʻia a passivated, hāʻawi i ka mana electrochemical like ʻole ma kona ʻili. Hōʻike ka hoʻoheheʻe ʻia ʻana i ka microsegregation, e hana ana i nā cell galvanic ma lalo o ke kahe. ʻO ia ke kumu e hōʻoia ai mākou i kēlā me kēia pūʻulu Monel-ʻaʻole wale me nā palapala wili, akā me ka palapala palapala EDS ma ka pūnaewele a me ka hoʻāʻo ʻana i ka ferric chloride ASTM G48 ma mua o ka hoʻouna ʻana.
Kahi e hoʻouna maoli ai ʻo Monel Fittings i ka ROI—ʻAʻole wale nā Pepa kikoʻī
ʻEkolu mau noi e hoʻokaʻawale i ke kumumanaʻo mai ka waiwai:
- ʻO nā manifold hydraulic kiʻekiʻe i loko o nā kaʻa ʻenekinia waho—kahi e koi ai ke kaʻa kaʻa wela + noe paʻakai + haʻalulu ʻaʻohe leaka ma luna o 15,000 mau hola hana. Pono nā mea keleawe maʻamau a i ʻole 316 SS ma ʻaneʻi e hoʻololi i kēlā me kēia hapaha; Noho ʻo Monel 400 i 3+ mau makahiki me ka hōʻino ʻole ʻana o ke sila.
- ʻO nā hui hoʻoheheʻe pump ka lawelawe ʻana i ka wai ʻino chlorinated a i ʻole ka condensate piha i ka H₂S. Ma ʻaneʻi, kūʻē nā uniona milo ʻo Monel K-500 i ka maʻi ʻeha i ka wā o ka wehe ʻana o ka mālama ʻana - kahi wahi ʻeha maʻamau me nā mea ʻē aʻe duplex stainless.
- ʻAla a me ke kinoea hoʻoheheʻe kemika, ʻoi aku ka nui o ka poʻe e hoʻopaʻa ana i ka methanol a i ʻole nā mea hoʻopaneʻe corrosion i loko o nā paipu. Mālama ʻo Monel 400 i ka pono ma -40°C a i +120°C, e pale ana i ka haki ʻana a i ʻole ke kolo anu i ʻike ʻia i loko o kekahi mau keleawe nickel-aluminum.
ʻAʻole mākou e paipai iā Monel no nā laina wai haʻahaʻa a i ʻole nā ʻōnaehana ea lewa. He nui loa—a he pipiʻi. Akā inā ʻaʻole i manaʻo ʻia ka hāʻule ʻana, ka pilikia palekana, a i ʻole ka hoʻokuʻu ʻana i ke kaiapuni, hāʻule nui ke kumukūʻai-hoʻokahi-hola-o ka hilinaʻi.
He aha ka mea e hana maoli ai ka hoʻopili ʻana o Monel—Ma waho aʻe o ke Code Alloy
ʻAʻole hāʻule ka hoʻokomo ʻana o Monel mai ke koho waiwai—akā, mai nā hakahaka hoʻokō. Hoʻopaʻa mākou i ʻehā mau kumu kumu hou i ka hoʻihoʻi kahua:
- ʻAʻole kūlike ke ʻano geometric thread: ʻO ka haʻahaʻa haʻahaʻa haʻahaʻa o Monel a me ke kiʻekiʻe o ka hoʻoikaika paʻa ʻana i ka hana e koi aku i nā ʻae ʻoi aku ka paʻa ma luna o ke alakaʻi a me nā kihi ʻaoʻao. ʻO ka 60° V-thread tap maʻamau e waiho i nā micro-waimaka e lilo i kahua hoʻomaka. Hoʻohana mākou i nā paipu lepo maʻamau me nā kihi hoʻomaha 3° a me ka annealing hoʻomaha hoʻomaha ma hope o ka mīkini.
- Hoʻohui Galvanic: ʻO ka hoʻopaʻa ʻana i nā flanges Monel 400 i ka paipu kila kalapona me ka ʻole o ka hoʻokaʻawale dielectric e kono aku i ka hoʻomāliʻi ʻana i ka ʻino ma ke kikowaena. Hoʻokaʻawale mākou i nā kīʻaha non-conductive a me nā pahu lima insulating - ʻaʻole nā mea ʻokoʻa.
- Hoʻohaumia ʻili: Hoʻokomo ʻia nā ʻāpana hao mai nā mea hana like ʻole i loko o nā ʻili o Monel, e ʻōpala a hoʻohaʻahaʻa i ka hoʻokumu ʻana i nā kiʻiʻoniʻoni passive. Holo kā mākou pūnaewele CNC iā Monel-wale—ʻaʻohe hoʻopailua kea me nā ʻāpana kila kila a i ʻole.
- Weld decay zones: Hiki ke weldable ʻo Monel, akā ʻo ke koho hoʻopihapiha kūpono ʻole a i ʻole ka mālama wela interpass e hana i ka ua carbide intergranular. No nā mea pono Monel welded, hoʻohana mākou i ka ERNiCu-7 filler me 150°C max max interpass temp a post-weld pickling.
ʻAʻole kēia mau manaʻo manaʻo. He mau haʻawina lākou mai 217 kahua hoʻolālā ma waena o nā kahua o ke Kai ʻĀkau, nā hale hoʻoheheʻe ʻĀkia Hikina Hema, a me nā keʻena pamu ʻo US Gulf Coast.
Ke koho ʻana i kahi mea hoʻolako—I ka wā ʻaʻole lawa ka "hōʻoia".
Hiki i kekahi mea kūʻai ke hoʻouna iā Monel i hōʻoia ʻia ʻo ASTM B164. He kakaikahi ka mea hiki ke hōʻoia i ka paʻa ʻana o ka nui ma waena o ka nui o ka nui, e ʻimi i nā pōʻaiapuni mālama wela i kēlā me kēia ʻāpana, a i ʻole e hōʻoia i ka hana corrosion ma kāu kemika wai. Ma QINGDAO QIANGSENYUAN TECHNOLOGY CO., LTD., mālama mākou i ka hana ʻana o ka monel e like me kahi ʻōnaehana pani-loop: ʻimi ʻia nā mea waiwai me ka palapala hōʻoia pālua (mill + in-house OES), CNC machining me ka nānā ʻana i ka wela manawa maoli, a me ka nānā hope ʻana me ka hoʻohana ʻana i ka paʻakai paʻakai + electrochemical impedance spectroscopy-ʻaʻole wale nānā ʻike. Hāʻawi kēlā me kēia pūʻulu i ka traceability piha: helu hoʻoheheʻe, lā forging, log curve anneal, hōʻike CMM, a me ka ʻikepili hōʻike corrosion. ʻAʻohe ʻokoʻa.
ʻAʻole i kūkulu ʻia ka hilinaʻi i loko o ka pā. Ua kūkulu ʻia i loko o ke kaʻina hana-i kēlā me kēia manawa. I ka wā e pono ai kāu ʻano hydraulic koʻikoʻi hou i nā pono Monel ʻaʻole e kāhāhā iā ʻoe i ka hoʻomaka ʻana, e nānā i ka ʻikepili. E nānā i nā mana ma hope o ka palapala hōʻoia.
