Wɔ nnwuma te sɛ paipu a wɔtɔ, mfiridwuma mu adansi, dan mu nneɛma a wɔde siesie, ne nnuru a wɔde fa nsu mu no, dade a ɛnyɛ den a wɔde fa nsu mu, a mfaso wɔ so sɛ ɛko tia nsɛe, ahoɔden a ɛkɔ soro, ɛtra hɔ kyɛ, na ɛyɛ fɛ no abɛyɛ paipu ahorow a wɔde di dwuma kɛse no mu biako. Nnipa pii a wɔtɔ nneɛma, mfiridwumayɛfo, ne wɔn a wɔkyekyɛ nneɛma taa hu sɛ dade a ɛnyɛ den a wɔde yɛ nneɛma ahorow pii no ho dwiriw wɔn bere a wɔrepaw nneɛma no: 201, 304, 316L, 430... Nsonsonoe ankasa bɛn na ɛda saa nneɛma ahorow yi ntam? Ɔkwan bɛn so na ɛsɛ sɛ obi gyina sɛnea wɔde di dwuma no so paw? Ɛnnɛ, yɛbɛsan ahwɛ nneɛma atitiriw a wɔde dade a ɛnyɛ den ayɛ a wɔde yɛ paipu a ɛwɔ gua so no mu yiye, akyerɛkyerɛ su, nsonsonoe, ne sɛnea wɔde di dwuma sɛnea ɛfata a ɛwɔ ɔkwan biara so no mu, na yɛaboa obiara ma wakwati mfomso wɔ nneɛma a wɔpaw mu. Wɔakyekyɛ dade a ɛnyɛ den paipu atitiriw a ɛwɔ gua so no mu titiriw ayɛ no akuw anan: 200 series, 300 series, 400 series, ne duplex stainless dade. Ntoatoaso ahodoɔ no yɛ soronko kɛseɛ wɔ dadeɛ a ɛwɔ mu, nsɛeɛ a ɛko tia, magnetism, ɔhyeɛ a ɛkorɔn-a ɛko tia, dwumadie adwumayɛ, ne boɔ, a ɛno nso yɛ gyinapɛn titire a wɔde kyerɛ nsonsonoeɛ a ɛda grade ahodoɔ ntam.
一. 200 Series Stainless Steel Pipes: Manganese a Ɛkorɔn, Nickel a Ɛba Fam, Ɛka-Paw a Etu mpɔn
Nneɛma a Wɔde Yɛ Ananmusifo: 201, 202
Series 200 yɛ austenitic dade a ɛnyɛ den dea. Nea ɛbɛyɛ na wɔatew ɛka so no, wɔde manganese si nikel no fã bi ananmu, na ɛma mprempren ɛyɛ dade a ɛnyɛ den paipu a ne bo yɛ mmerɛw sen biara wɔ gua so.Sɛ wɔde awɔw yɛ adwuma wie a, saa paipu yi da magnetism kakra adi. Ne mfitiaseɛ a ɛko tia nkannareɛ no yɛ nkyɛmu na ɛfata ma dan mu mmeaeɛ a ɛyɛ kusuu, a ɛnyɛ-nsɛeɛ nko ara. Nsuo mu ban a wɔtaa de, dan mu paipu, dan mu nneɛma a wɔtaa de siesie, ne bere tiaa mu nsuo afiri a ɛnyɛ den no de dade paipu 201 a ɛnyɛ den na ɛyɛ adwuma.
Ne sintɔ ahorow da adi yiye: entumi nnyina nkyene a wɔde petepete so ne acid ne alkalis ano yiye. Sɛ wogyaw wɔ abɔnten, mpoano mmeae, anaa adwumayɛbea ahorow a ɛhɔ yɛ nwini bere tenten a, ɛnyɛ den koraa sɛ ɛbɛka nkannare na ayɛ nsensanee wɔ asase ani. Enti, wɔmfa nkamfo koraa mma nsu a wɔde ma ne nsu a wɔde fa mu, nnuru, abɔnten so mfiridwuma, anaa mpoano nnwuma. Sɛ obi de anifurae paw 201 sen sɛ ɔbɛpaw nneɛma a ɛkorɔn-awie de adi bo a ɛba fam akyi kɛkɛ a, akyiri yi nsiesie ne nsakrae ho ka bɛkɔ soro kɛse.
2. 300 Series Stainless Steel Pipes: Adwumayɛ a eye sen biara wɔ ne nyinaa mu, Market Mainstream
300 series no nso yɛ austenitic stainless steel na mprempren ɛyɛ series a wɔde di dwuma kɛse a ɛwɔ din a ɛyɛ den sen biara. Ɛnyɛ-magnetic koraa, a ɛkari pɛ a ɛko tia nsɛe, ɛyɛ den, ne welding adwumayɛ, na wɔde wɔn ani si ne grades pɔtee so kɛse.
1. 304 Dade a Ɛnyɛ Den Pipe (General Benchmark) .
Eyi ne dade a ɛnyɛ den a ɛyɛ aduan-grade a ɛyɛ tete de sen biara wɔ ɔmanfo adwene mu, a ɛwɔ chromium ne nickel nsusuwii a ɛkari pɛ wɔ nyansahu mu, adwumayɛ nyinaa a ɛyɛ kurukuruwa yiye, ɛko tia nsu pa mu nsɛe a ɛkyɛn so, na ɛko tia oxidation a ɛda nsow wɔ ɔhyew a ɛfata mu. Ɛyɛ mmerɛw yiye nso sɛ wobɛyɛ ho adwuma, abɔ, na woabɔ.
Esiane sɛ ɛyɛ nea ahobammɔ wom, ɛnyɛ awuduru, na ɛyɛ den nti, dade a ɛnyɛ den paipu 304 kata ɔmanfo ne mfiridwuma mu nsɛm dodow no ara so: nsu a wɔnom, nnwinnade a wɔde yɛ aduan ho nhama, nkurow akɛse mu nsu a wɔde ma ne nsu a ɛkɔ nsu mu, adansi ho ahosiesie, mfiri a wɔde yɛ mfiri a ɛyɛ mpapahwekwa nsu afiri, ne nea ɛkeka ho Wobetumi de adi dwuma wɔ dan mu ne abɔnten so mmeae a ɛyɛ kusuu a wɔtaa de di dwuma, na ɛsan nso yɛ nea mfitiaseɛ kan-paw nneɛma a wɔde yɛ mfiridwuma mu adetɔ.
2. 304L Dade a Ɛnyɛ Den Pipe (Low Carbon Upgraded Version) .
Sɛ wogyina 304 so a, carbon a ɛwɔ mu no so tew. Mfaso titiriw a ɛwɔ so ne welding adwumayɛ a emu yɛ den, na ɛma ɛnyɛ den sɛ ɛbɛsɛe intergranular corrosion bere a wɔabɔ welding akyi, na ɛnyɛ mmerɛw sɛ weld ahorow no bɛpaapae anaasɛ ɛbɛsɛe.
Ɛfata ma nsuo afiri akɛseɛ, nsuo akoraeɛ tank nsuo afiri, ne nsuo afiri a ɛkɔ akyirikyiri a ɛhia sɛ wɔde weld yɛ adwuma kɛseɛ wɔ-beaeɛ, na ɛma ɛyɛ nea wɔpɛ ma mfiridwuma mu welding tebea.
3. 316 ne 316L Stainless Steel Pipes (Nkyem a Ɛkorɔn-Nkyerɛase a Ɛko Tia)
Nneɛma abien no nyinaa bi ne molybdenum a wɔde aka ho, a ɛno ne nsonsonoe titiriw bere a wɔde toto 304. Molybdenum ma paipu no tumi a ɛko tia chloride ions, nkyene a wɔde petepete, ne acid-base corrosion no yɛ kɛse kɛse, na ɛma ne nsɛe a ɛko tia no korɔn koraa sen 304, na ne bo yɛ den sɛnea ɛne no hyia.
Wɔn mu no, 316L yɛ low-carbon version, a ɛma ahoɔden a eye sen biara wɔ welding akyi. Saa nsuo afiri yi fata titire ma mpoano mmeaeɛ, po mu mfiridwuma, ɛpo mu nsuo a wɔde fa nneɛma, nnuruyɛ, nnuru pa, nsuo fĩ a wɔde yɛ adwuma, ne mmeaeɛ foforɔ a ɛporɔw kɛseɛ, na wɔtaa de di dwuma nso wɔ aduruyɛ nnwinnadeɛ ne ahoteɛ ho nneɛma a ɛkorɔn-end. Wɔ tebea horow a nkyene anaa chlorine wom mu, baabi a wontumi mfa 304 nni dwuma no, mpɛn pii no, 316L na wɔpaw.
4. 321 Stainless Steel Pipe (Wɔayɛ no Titiriw ama Ɔhyew a Ɛkorɔn)
Wɔde titanium nneɛma ka ade no ho, titiriw sɛnea ɛbɛyɛ a dade a wɔde yɛ adwuma no gyina pintinn. Ɛbɛtumi akura adwumayɛ a ɛyɛ den mu wɔ mmeaeɛ a ɛhɔ yɛ hyew a ɛyɛ digrii 450 kɔsi digrii 850 , a ɛko tia ɔhyeɛ a ɛkorɔn oxidation ne intergranular corrosion a ɛda nsow.
Ɛnyɛ den titiriw wɔ acid ne alkali a ɛko tia mu, nanso ɛtwe adwene si ɔhyew a ɛkorɔn-a ɛko tia so, na wɔde di dwuma kɛse wɔ boiler pipelines, heat exchangers, ne mfiridwuma mu ɔhyew a ɛkorɔn-flue gas delivery pipelines mu, ne nneɛma afoforo a ɛwɔ ɔhyew a ɛkorɔn-ho.
3.400 Series Stainless Steel Pipes: Ferritic / Martensitic, Abɔde mu Magnetic
Nea ɛnte sɛ 300 series a ɛnyɛ-magnetic no, 400 series stainless steel no yɛ magnetic koraa, nickel biara nni mu, ne bo sua, na wɔakyekyɛ mu ayɛ no dwumadie akwankyerɛ titire mmienu a egyina adwumayɛ so.
1. 430 Stainless Steel Pipe (Wɔpɛ sɛ wɔde siesie ne dabiara a wɔde di dwuma)
Ɛyɛ ferritic stainless steel dea, ɛwɔ soro polishing tumi pa, ɛko tia nkannare a ɛkɔ fam, na ɛho ka sua-. Ne nsɛe a ɛko tia no yɛ mmerɛw sen 304 nanso eye sen 201. Wɔtaa de di dwuma wɔ adididan mu nnwinnade, mfiri afã horow, paipu a wɔde siesie nneɛma a ɛnyɛ den, ne nnwinnade a nitric acid nsɛe a ɛnyɛ den mu. Ɛfata ma tebea horow a ɛho nhia sɛ ahoɔden kɛse wom, a wɔde wɔn adwene si sɛnea ɛte ne mfitiasede a wosiw nkannare ano so.
2. 409, 410, 420 Stainless Steel Pipes (Ɔhyew-a ɛko tia, Kɔ soro-ahoɔden Nkyerɛase ahorow)
409 si ɔhyew a ɛko tia so dua titiriw na wɔtaa de di dwuma wɔ kar mu mframa a wɔde yi mframa fi mfiridwuma mu nsu afiri a ɛma mframa bɔne a ɛba fam-mu; 410 ne 420 yɛ dade a ɛnyɛ den a ɛyɛ martensitic a carbon pii wom, a ebetumi ama ne den ne ahoɔden akɔ soro denam ɔhyew a wɔde yɛ no so, nanso sɛ wɔkyekyem pɛpɛɛpɛ a, sɛnea ɛko tia nsɛe no. Wɔmfa saa nsuo afiri yi nni dwuma mma nsuo afiri a ɛko tia-nsɛeɛ na wɔtaa de yɛ valve, shaft, mfiri afã, nnade, ne nneɛma foforɔ a ɛhia sɛ ɛyɛ den na ɛko tia.
5. Nneɛma a Wɔde Hu Ntɛmntɛm ne Adetɔ Ho Nsɛm a Wɔaboaboa Ano
Yɛde atifi hɔ su ahorow no bom no, yɛhyehyɛ adetɔ ho ntease no wɔ ɔkwan a ɛyɛ tẽẽ sen biara so de boa obiara ma ɔne n’ahiade hyia ntɛmntɛm:
1.Limited sikasɛm nhyehyɛe, purely dan mu dry tebea:paw 201, ma ahosiesie ne adan a ɛnyɛ den nkutoo, a ɛnyɛ nea ɛne nsu anaa nneɛma a ɛporɔw di nkitaho;
Nsɛm a ɛfa ho nyinaa, nsuo a wɔnom, aduane, mfiridwuma a wɔyɛ no daa, dan mu ne abɔnten tebea a ɛyɛ mpapahwekwa: nea edi kan a wɔpaw 304, efisɛ ɛma ɛka a ɛkari pɛ sen biara-adwumayɛ ne adwumayɛ;
2.Pipeline nnwuma a ɛtrɛw welding:fa 304L di kan;
3.High-nsuo a atwa yɛn ho ahyia te sɛ mpoano mmeaeɛ, ɛpo ho, ɛpo mu nsuo, nnuru, nnuruyɛ:kɔhwehwɛ 316/316L;
4.High-ɔhyew pipelines, boilers, ɔhyew sesa nnwinnade:fa 321 di dwuma;
5.Household mfiri, mpapahwekwa asiesie, brɛoo corrosion resistance:paw 430;
6.Mfiri afã horow, soro - ɔhyew exhaust, soro -hardness afã horow:fa 409, 410, 420 di dwuma.
Wɔ dade a ɛnyɛ den paipu a wɔtɔ mu no, biribiara nni hɔ a eye sen biara koraa, na mmom nneɛma a ɛfata sen biara nkutoo. Ɛnyɛ den sɛ adetɔfo pii bɛtɔ afiri a ɛne sɛ ‘wɔde wɔn adwene besi bo nkutoo so,’ de nneɛma a ne bo nyɛ den besi paipu a wɔhwehwɛ kɛse-si ananmu, na awiei koraa no ɛde nsɛm te sɛ nkannare, nsu a ɛtwetwe, ne adwuma a wɔsan yɛ bio ba. Nsonsonoeɛ titire a ɛda nneɛma ntam nteaseɛ, ne nneɛma te sɛ baabi a wɔde di dwuma, tebea a ɛyɛ nsɛeɛ, ɔhyeɛ a wɔhwehwɛ, ne sikasɛm nhyehyɛeɛ a wobɛsusu ho no, ne ɔkwan baako pɛ a wobɛfa so apaw dadeɛ a ɛnyɛ den afiri a ɛtumi tena hɔ kyɛ, ɛnyɛ den, na ɛho ka sua-a ɛho ka sua, a ɛbɛma akwan a wɔbɛfa so akɔ akyirikyiri wɔ adetɔ ne dwumadie mu no ayɛ ketewa.
