Izinto Eziyinhloko (Insimbi Esekelayo – izinketho eziningi):
●I-API 5L X52 / X60 / X65– ipayipi lomugqa onamandla aphezulu lokudluliswa kukawoyela negesi/i-asidi
●I-SA-106 Gr.B– insimbi yekhabhoni enokushisa okuphezulu
●I-SA-210 Gr.C- izinga leshubhu yebhoyila
●I-ASTM A333 Gr.6– insimbi yekhabhoni enokushisa okuphansi
●I-ASTM A335 P11 / P22– I-Cr-Mo alloy yokushisa okuphezulu (ukusetshenziswa okulinganiselwe ne-904L)
Ukubopha (i-CRA liner):904L (UNS N08904 / 1.4539) – insimbi engagqwali ye-austenitic ene-alloy ephezulu ene-23-28% Ni, 19-23% Cr, 4-5% Mo, 1-2% Cu. PREN ≈ 34. Ukumelana okuhle kakhulu nokunciphisa ama-asidi (i-sulfuric, i-phosphoric, i-formic), ukumelana okuhle ne-chloride pitting, okungaphezu kuka-316L ekusetshenzisweni kwe-asidi.
Ububanzi Bosayizi:I-OD 60 – 1219 mm (ipayipi elimboziwe elihlanganisiwe – i-hot roll + JCOE). I-OD 25 – 168 mm (i-extrusion engenamthungo). Ubukhulu bodonga oluyinhloko 4 – 40 mm. Ubukhulu be-cladding 2.0 – 4.0 mm (3.0 mm kunconywa isevisi ye-asidi). Ubude obubodwa bufika ku-15 m (abunamthungo) noma 24 m (bunamthungo).
Inqubo:Ukubopha okugoqekayo okushisayo + ukwakheka kwe-JCOE (okushisiwe) noma okushisayo (okungenayo i-thumb). Amandla okucheba isibopho se-Metallurgical ≥200 MPa (okushisiwe) noma ≥300 MPa (okungenayo i-thumb). Ukuhlolwa kwesibopho se-UT esingu-100%, ukuhlolwa kwe-hydrostatic, ukuhlolwa kokudonsa, ukuthamba, i-PMI yokuzikhethela kanye nokuhlolwa kokugqwala kwe-intergranular.
Amazinga:I-API 5LD (yepayipi elinomugqa ohlanganisiwe), i-ASME Section VIII Div.1, EN 10216-5 (yepayipi elingahlanganisiwe elingu-904L), i-ASTM A240 (ipuleti elingu-904L). I-NACE MR0175: I-904L iyamukeleka kwisevisi emuncu kuphela ngaphansi kwezimo ezilinganiselwe kakhulu (i-H₂S ephansi, ama-chloride aphansi, izinga lokushisa eliphansi) – akukhuthazwa ngokuvamile.
Izicelo:Amapayipi ezitshalo ze-sulfuric acid, izitshalo zomanyolo we-phosphoric acid, amapulazi amathangi amakhemikhali, izinhlelo zokupholisa amanzi olwandle (i-chloride ephezulu), izihlanzi ze-flue gas desulfurization (FGD), ukudluliselwa kwamakhemikhali okumsulwa okuphezulu, isevisi ye-acetic / formic acid, ukucubungula imithi kanye nokudla (ukuhlanzeka okuphezulu).
Insimbi YaseWomicikhiqiza ipayipi elimbozwe ngomugqa ongu-904L lezicelo zokuphatha i-asidi ezidinga kakhulu. Sihlanganisa ukumelana nokugqwala kwe-904L namandla okusebenza kwe-carbon/alloy steel backing, sisindisa ipayipi elingu-40 60% uma kuqhathaniswa nepayipi eliqinile elingu-904L. Ubukhulu obungokwezifiso, ukuhlolwa komuntu wesithathu, i-EN 10204 Uhlobo 3.2 luyatholakala. Xhumana nathi ukuthola izixazululo zamapayipi ambozwe ngomugqa ophezulu.
1. Kungani Kudingeka Ipayipi Elimboziwe Elingu-904L? Uma U-316L Enganele
I-904L (UNS N08904 / 1.4539) iyinsimbi engagqwali e-austenitic eyenziwe nge-alloy ephezulu eyenzelwe ngqo ukusetshenziswa lapho i-316L yehluleka ngenxa yokumelana ne-asidi noma ukugoba okwanele.
Izinto ezihlukanisayo ezibalulekile uma kuqhathaniswa ne-316L:
| Impahla | 316L | 904L | Inzuzo |
| I-Nickel (%) | 10-14 | 23-28 | I-Ni ephezulu ithuthukisa ukumelana ne-asidi |
| I-Molybdenum (%) | 2-3 | 4-5 | I-Higher Mo ithuthukisa ukugoba kwe-pit |
| Ithusi (%) | — | 1-2 | I-Cu ibalulekile ekumelaneni ne-sulfuric acid |
| UKUPHUTHUMALA | 24-26 | 34 | I-904L imelana kakhulu nomgodi |
| Ukumelana ne-sulfuric acid | Kubi ngaphansi kuka-10% noma ngaphezulu kuka-80% | Kuhle kakhulu 0-80% ekushiseni okumaphakathi | I-904L iyindinganiso yesevisi ye-H₂SO₄ |
Ama-asidi ajwayelekile lapho i-904L idlula khona:
● I-asidi ye-sulfuric (H₂SO₄) – ukuhlushwa okungu-0-80%, kufika ku-50°C
● I-Phosphoric acid (H₃PO₄) – wonke amazinga
● I-asidi ye-formic (HCOOH) kanye ne-acetic acid (CH₃COOH)
● Nciphisa i-hydrochloric acid (HCl) – inqunyelwe
● Ama-asidi axubile (isib., i-H₂SO₄ + ama-chloride)
Kungani egqoke izingubo?Ipayipi eliqinile elingu-904L libiza kakhulu (intengo engu-2 3 × engu-316L, intengo engu-5 6 × yensimbi yekhabhoni). Ngokusebenzisa ungqimba olungaphakathi oluncane (2 4 mm) lwe-904L oluhlanganiswe nepayipi langaphandle lensimbi yekhabhoni, uthola ukumelana okufanayo kokugqwala ku-Izindleko zezinto zokwakha eziphansi ngo-40% 60%Ingqikithi yensimbi yekhabhoni inikeza amandla omshini ngengxenye encane yezindleko ze-alloy.
Izimboni ezivamile:Ukukhiqizwa kanye nokuthuthwa kwe-sulfuric acid, izitshalo zomanyolo we-phosphate, imigqa yokugaya insimbi, amathangi amakhemikhali, ama-heat exchanger amanzi olwandle (i-chloride ephezulu, izinga lokushisa eliphakathi nendawo).
2. Imininingwane Yezinto Ezibalulekile – Izinketho Zensimbi Ezimboziwe Nezisekela Ezingu-904L
2.1 Ukwakheka Kwamakhemikhali Okumboziwe okungu-904L (% ngobuningi)
| Isici | I-UNS N08904 (904L) |
| Ikhabhoni (C) | ≤0.020 |
| I-Manganese (Mn) | ≤2.00 |
| I-Silicon (Si) | ≤1.00 |
| I-Phosphorus (P) | ≤0.040 |
| I-Sulfur (S) | ≤0.030 |
| I-Chromium (Cr) | 19.0 – 23.0 |
| I-Nickel (Ni) | 23.0 – 28.0 |
| I-Molybdenum (Mo) | 4.0 – 5.0 |
| Ithusi (Cu) | 1.0 – 2.0 |
| Insimbi (Fe) | Ibhalansi |
Ukwengezwa kwethusi kubalulekile ekumelaneni ne-sulfuric acid. Ngaphandle kwe-Cu, i-316L ihlaselwa ngokushesha ku-H₂SO₄ efudumele.
2.2 Izakhiwo Zemishini (Izinga Lokushisa Legumbi)
| Impahla | Isimbozo esingu-904L | Ukusekelwa Kwensimbi Yekhabhoni Ejwayelekile |
| Amandla Okukhiqiza (min, MPa) | 220 | 240 450 (kuye ngokuthi ibanga lingakanani) |
| Amandla Okudonsa (min, MPa) | 490 | 415 535 |
| Ukwelulwa (ubuncane, %) | 35 | 18 25 |
| Ubulukhuni (ubuningi) | 200 HB | Ngokwebanga ngalinye |
2.3 Ukumelana Nokugqwala okungu-904L – Idatha Eyinhloko
| I-asidi | Ukugxila | Izinga lokushisa | Izinga Lokugqwala (mm/ngonyaka) |
| I-Sulfuric (H₂SO₄) | 10-50% | 50°C | <0.1 (kuhle kakhulu) |
| I-Sulfuric (H₂SO₄) | 70-80% | 30°C | <0.1 |
| I-Phosphoric (H₃PO₄) | 30-85% | 80°C | <0.1 |
| I-asidi ye-formic | Noma yikuphi | 100°C | <0.1 |
| I-Acetic acid | Noma yikuphi | 100°C | <0.1 |
| Amanzi olwandle | 3.5% Cl- | 30°C | Ukumelana nokugoba kuhle (PREN 34) |
Imikhawulo:I-904L ayinconywa kwi-asidi ye-sulfuric egxilile (>80°C) eshisayo (>90%) noma kwinsizakalo ye-hydrochloric acid eshisa kakhulu. Kulabo, cabanga ngama-alloy e-nickel (i-Alloy C-276).
2.4 Izinketho Zensimbi Esekelayo Yepayipi Elimboziwe Elingu-904L
| Insimbi Esekelayo | Okujwayelekile | Amandla | Isicelo Esiyinhloko Se-904L Clad |
| I-API 5L X52 / X60 / X65 | I-API 5L PSL2 | Isivuno se-MPa esingu-360 450 | Amapayipi e-asidi amabanga amade |
| I-SA-106 Gr.B | I-ASTM A106 | Isivuno se-MPa esingu-240 | Amapayipi ezitshalo zokuhlanza kanye namakhemikhali |
| I-SA-210 Gr.C | I-ASME SA-210 | Isivuno se-MPa esingu-245 | Amashubhu ebhoyila/okushintshanisa ukushisa ane-asidi |
| I-ASTM A333 Gr.6 | I-ASTM A333 | Isivuno se-MPa esingu-240 | Amapayipi e-asidi aphansi okushisa (-45°C) |
| I-ASTM A335 P11 / P22 | I-ASTM A335 | Isivuno se-MPa esingu-205 275 | Izinga lokushisa eliphezulu (>450°C?) Qaphela: 904L inqunyelwe ku-~350°C ku-asidi |
Qaphela izinga lokushisa eliphezulu:I-904L ngokwayo ayifaneleki amazinga okushisa ensimbi angaphezu kuka-350-400°C ekusetshenzisweni okugqwalisayo. Insimbi esekelayo ingase imelane namazinga okushisa aphezulu, kodwa ukumbozwa kuzokhawulela izinga lokushisa lenkonzo iyonke. Ukuze uthole isevisi ye-asidi ephezulu (>400°C), cabanga nge-Alloy 825 noma i-Alloy 28 cladding.
2.5 Ububanzi Bokulinganisa
| Indlela Yokukhiqiza | Ububanzi be-OD (mm) | Isisindo Esiyinhloko (mm) | Isisindo Esimboziwe (mm) | Ubude Obuphezulu (m) |
| Kushiselwe (i-hot roll + i-JCOE) | 219 – 1219 | 6 – 40 | 2.0 – 4.0 | 24 |
| Akunamthungo (ukukhipha) | 25 – 168 | 4 – 15 | 2.0 – 3.5 | 15 |
Ubukhulu bokumboza obunconyiwe benkonzo ye-asidi:Ubuncane obungu-3.0 mm. Ezimweni ezibukhali kakhulu (isb., i-sulfuric acid eshisayo enejubane lokugeleza eliphezulu), sincoma u-4.0 mm.
3. Inqubo Yokukhiqiza – I-Hot Roll Bonding + JCOE (Ehlanganisiwe, OD ≥219 mm)
Kumapayipi amakhulu ane-asidi, lena yindlela eyinhloko:
| Isinyathelo | Incazelo |
| Ukulungiselela ipuleti | Ipuleti elingu-904L (CRA) kanye nepuleti lensimbi yekhabhoni (isisekelo) kuyahlanzwa, kubekwe ndawonye (904L ohlangothini olungaphakathi), bese kuvalwa nge-vacuum ukuze kususwe umoya-mpilo. |
| Ukubopha okushisayo | Inqwaba ishiswa ku-1100-1180°C bese igoqwa ngesilinganiso sokunciphisa okuphezulu (≥5:1). Izingqimba zibophana ngokwensimbi. |
| Ipuleti le-NDT | Ukuhlolwa kwe-ultrasonic okungu-100% kwe-clad plate bond interface. |
| Ukwakhiwa kwe-JCOE | Ipuleti elimboziwe liyagaywa ngomphetho, bese lenziwa ipayipi elivulekile kusetshenziswa imishini yokucindezela i-JCO. I-904L iba ubuso bangaphakathi. |
| Ukushisela umthungo we-longitudinal | Amaphasi amabili: iphasi yangaphakathi ene-904L filler (noma i-Alloy 625), amaphasi angaphandle ane-carbon steel filler. |
| Ukumbozwa kokushisela (ongakukhetha) | Umthungo wokushisela wangaphakathi ungase umbozwe nge-904L noma i-Alloy 625 ukuze umbozwe ngokuphelele ukugqwala. |
| Ukwelashwa ngokushisa | Ukuqeda ukucindezeleka (uma kudingeka). I-904L ayidingi ukwelashwa kokushisa ngemva kokushiswa. |
| I-NDT kanye nokuhlolwa | NgokweSigaba 4. |
| Ukukhahlela kanye nokuphumula | Kobuso obungaphakathi obungu-904L, ukuqinisekisa ungqimba olungasebenzi. |
| Ukuhlolwa kokugcina nokuthunyelwa | I-Bevel, izigqoko, ukubopha. |
Kokungenamthungo (ububanzi obuncane, i-OD ≤168 mm):Ukuphonswa kwe-Centrifugal + i-extrusion eshisayo (okufana nezinto zangaphambilini zepayipi elimboziwe). I-Seamless isusa i-weld ende, ekhethwa kakhulu kuma-heat exchangers e-U bend kanye nemigqa yobumsulwa obuphezulu.
4. Ukuhlolwa Nokuhlolwa – Ipayipi Elimboziwe elingu-904L
Njengoba i-904L iyi-alloy ephezulu, sinaka kakhulu ukwakheka kwe-cladding kanye nokuqinisekiswa kokuhlolwa kokugqwala.
| Ukuhlolwa | Okujwayelekile / Indlela | Ububanzi | Ukwamukelwa |
| I-PMI (XRF) ye-904L cladding | Ukuhlonza Izinto Ezinhle | Ithubhu ngalinye (noma ipuleti ngalinye) | Qinisekisa i-Cu, i-Mo, i-Ni, i-Cr ngaphakathi kwe-spec |
| I-Bond UT | Igagasi lokugunda | I-interface ehlanganisiwe engu-100% | Akukho ukuhlukaniswa >50mm; inani eliphelele <2% |
| I-UT ende | I-ASTM E213 / ISO 10893 10 | 100% wepayipi | Awekho ama-echo angamukeleki |
| Ukuhlolwa kwe-hydrostatic | Ingcindezi yomklamo engu-1.5 × | Ithubhu ngalinye | Akukho ukuvuza |
| Insimbi ethambile (insimbi esekelayo) | Ngokwe-API 5L / A106 / njll. | Ngokushisa ngakunye | Hlangana nemininingwane yebanga |
| Ukunamathela (ukucheba isibopho) | Phusha noma uchebe indandatho | Ngeqoqo ngalinye | ≥200 MPa (eshiselwe) |
| Ukuqina (ukumbozwa okungu-904L) | I-HV10 | Iqembu | ≤200 HV |
| Ukugqwala kwe-intergranular | I-ASTM A262 Practice E (ku-904L) | Ngeqoqo ngalinye (ongakukhetha) | Akukho ukuhlaselwa kwe-intergranular |
| Ukuhlolwa kokuthamba | I-ASME SA 450 | Ngeqoqo ngalinye | Akukho mifantu |
Izitifiketi:EN 10204 Uhlobo 3.1 (olujwayelekile). Uhlobo 3.2 olunofakazi beqembu lesithathu (SGS, BV, DNV, TÜV) luyatholakala uma luceliwe.
Ukuhlolwa okwengeziwe uma kuceliwe (kungakhokhiswa):
● Amandla okuphonsa (ASTM G5)
● Ukuhlolwa kwe-Copper sulfate – i-sulfuric acid ye-904L (okuqondene ngqo nesevisi ye-H₂SO₄)
5. Izicelo – Lapho Ipayipi Elimboziwe Eliyi-904L Liyisinqumo Esifanele
5.1 Amapayipi Ezitshalo E-Sulfuric Acid
Inselele:I-asidi ye-sulfuric eshisayo (60-80%, 50-80°C) ilimaza kakhulu insimbi yekhabhoni ngisho ne-316L. I-904L ibilokhu iyizinto ezijwayelekile zokuhlanganisa i-sulfuric acid, imibhoshongo yokomisa, kanye nokuxhumanisa amapayipi amashumi eminyaka.
Isixazululo:Ipayipi elimboziwe elingu-904L elinesisekelo sensimbi yekhabhoni (SA-106 Gr.B noma i-API 5L X52). Ingqimba yangaphakathi engu-904L iphatha i-asidi; insimbi yekhabhoni inikeza amandla okucindezela futhi inciphisa izindleko.
Isibonelo:I-24″ OD × 12.7 mm core WIT × 3.0 mm 904L cladding, ubude buyi-12 m. Isetshenziswa eyunithi yokubuyisa isibabule eMpumalanga Ephakathi.
5.2 Izitshalo Zomanyolo We-Phosphoric Acid
Inselele:I-Phosphoric acid (30-50%, 50-90°C) iqukethe ama-chloride, ama-fluoride, kanye nezinto eziqinile. Imigodi kanye ne-crevice engu-316L iyabola. I-904L inikeza ukumelana okungcono kakhulu.
Isixazululo:Ipayipi elimboziwe elingu-904L elinokusekelwa kwe-SA-106 Gr.B. Ithusi eliku-904L liwusizo kakhulu ku-phosphoric acid.
5.3 Ukupholisa/Ukususa Usawoti Emanzini Olwandle (i-Chloride Ephezulu)
Inselele:Ama-316L angagqwala emifantwini emanzini olwandle angami lapho amazinga okushisa engaphezu kwama-30-40°C. Ama-904L ane-PREN ephezulu (34) futhi amelana kangcono nokugqwala.
Isixazululo:Ipayipi elimboziwe elingu-904L elinesisekelo se-API 5L X65 semigqa yokujova amanzi olwandle enomfutho ophezulu. Lisetshenziswa ezindaweni ezikude zasogwini zezinhlelo zamanzi omlilo kanye nokupholisa.
5.4 Ukugcinwa Nokudluliselwa Kwethangi Lamakhemikhali
Inselele:Amathangi okugcina i-acetic acid, i-formic acid, noma ama-organic acid axubile adinga i-alloy eqinile ebiza kakhulu noma insimbi yekhabhoni ehlanganiswe nerabha. Ulwelwesi lwerabha lungahluleka.
Isixazululo:Ipayipi elimboziwe elingu-904L linikeza isithiyo esihlala njalo, esingadingi ukulungiswa. Kumapayipi epulazini ethangi, ipayipi elimboziwe elimboziwe lilungele.
5.5 Izihlanzi Zokususa Igesi Emanzi (FGD)
Inselele:Izinhlelo ze-FGD zisingatha ama-slurries e-gypsum ane-pH ephansi kanye nama-chloride. Imibhoshongo eminingi ye-FGD yokufunxa kanye nama-outlet ducts asebenzisa ama-alloy angu-904L noma ngaphezulu.
Isixazululo:Ipayipi elimboziwe elingu-904L lemigqa yokujikeleza kabusha kwe-slurry. Isisekelo singaba yi-A106 Gr.B noma i-A333 Gr.6 (uma kubanda).
6. Kungani Kufanele Ukhethe Insimbi Yombhobho Wezimbobo Ezingu-904L?
| Amandla | Imininingwane |
| Isipiliyoni ngama-alloys aphezulu | Sikhiqize ipayipi elimboziwe elingu-904L lamaphrojekthi amaningi ezitshalo ezine-asidi eShayina, eMpumalanga Ephakathi, kanye naseNingizimu-mpumalanga ye-Asia. |
| Isibopho sangempela sensimbi | Akukho bungozi bokuwa kwe-liner – i-904L ixhunywe unomphela ensimbini engemuva. |
| Ububanzi obukhulu | Ububanzi obuncane obungenamthungo (i-extrusion) obufinyelela kububanzi obukhulu obuhlanganisiwe (1219 mm). |
| Ukulandeleka okugcwele | Inombolo ngayinye yokushisa kwepuleti engu-904L iyaqoshwa futhi ixhunywe nepayipi lokugcina. I-PMI ingenziwa ezindaweni eziningi. |
| Ukuhlolwa komuntu wesithathu | I-SGS, i-BV, i-DNV, i-TÜV ifakazelwe kulo lonke umkhiqizo. I-EN 10204 Uhlobo 3.2 luyatholakala. |
| Ukonga izindleko | Intengo ephansi ngo-40% ngo-60% kunepayipi eliqinile elingu-904L elinesilinganiso esifanayo sokucindezela. |
7. Ukupakisha, Ukuthumela kanye Nesikhathi Sokuhola
●Isimo:Ubuso obungaphakathi obungu-904L obufakwe ukhilimu futhi obungenasivikelo; insimbi yekhabhoni yangaphandle ingagcotshwa ngamafutha noma ifakwe i-primer.
● Ukuvikela kokuphela:Izivalo zepulasitiki (izivalo zensimbi zobubanzi obukhulu).
●Ukuhlanganisa:Kuma-diameter amancane (<20″) – ama-bundles anezikhala. Kuma-diameter amakhulu – ama-cradle ngamanye.
●Isikhathi sokulethwa (i-oda lokuqala):Amaviki ayi-14-18 (ukuthola nokufaka amapuleti angama-904L). Ama-oda aphindaphindwayo: amaviki ayi-10-12.
●I-MOQ:Ayikho i-MOQ eqinile; ama-oda okuhlola ayamukelwa (isb., amamitha ayi-100-200). Intengo yamanani amancane iphezulu.
8. Imibuzo Evame Ukubuzwa (Imibuzo Evame Ukubuzwa) – Ipayipi Elimboziwe elingu-904L
Umbuzo 1: Kufanele ngikhethe nini ipayipi elimboziwe elingu-904L kunelingu-316L?
A: Khetha i-904L uma isevisi ihilelai-sulfuric acid, i-phosphoric acid, i-formic/acetic acid, noma uma i-316L ibonisa ukugqwala noma ukugqwala okuvamile endaweni yakho. I-904L ingcono futhi emanzini afudumele olwandle (ama-chloride aphezulu). Uma uketshezi lune-asidi encane kuphela ngaphandle kwama-chloride, i-316L inganela.
Umbuzo 2: Lingakanani izinga lokushisa eliphezulu lama-904L?
A: Enkonzweni yokugqwala, i-904L ivame ukukhawulelwa ku-350-400°CNgaphezu kwalokho, izinto zingase zizwele noma zilahlekelwe ukumelana nokugqwala. Ukuze uthole isevisi ye-asidi yokushisa okuphezulu (>400°C), cabanga nge-Alloy 825 noma i-625.
Umbuzo 3: Ingabe i-904L ingasetshenziswa ekuhlinzekeni igesi emuncu (H₂S)?
A: I-NACE MR0175 / ISO 15156 ivumela i-904L yesevisi emuncu kuphela ezimweni ezithambile kakhulu: ingcindezi engaphelele ye-H₂S ephansi, ama-chloride aphansi, i-pH >3.5, izinga lokushisa <60°C. Kugesi evamile emuncu emanzi, i-Incoloy 825 iyathandwa.
Umbuzo 4: Yisiphi insimbi yokugcwalisa okufanele isetshenziswe ekushiseleni ipayipi elimbozwe nge-904L?
A: Ukuze uthole i-inner pass (904L kuya ku-904L), sebenzisaI-Alloy 625 (ERNiCrMo-3)nomaIsigcwalisi esingu-904L (ER385)I-alloy 625 ivame kakhulu futhi inikeza ukuphepha okuphezulu. Ungasebenzisi i-filler engu-316L.
Umbuzo 5: Ingabe ipayipi elimboziwe elingu-904L liyatholakala ngobubanzi obuncane (isb., 2″) lokusetshenziswa kwezinsimbi?
A: Yebo, ngenqubo yethu yokukhipha ngaphandle kwezinkinga. I-OD encane cishe ingu-25 mm (1″). Ubukhulu be-cladding 2.0 2.5 mm.
Umbuzo 6: I-904L iqhathaniswa kanjani ne-Alloy 28 (UNS N08028)?
A: Zombili ziyi-austenitics ephezulu ye-alloy ene-PREN efanayo (34 vs 38). I-Alloy 28 ine-Cr ne-Ni ephezulu, futhi imelana kangcono ne-chloride ephezulu + i-pitting yokushisa okuphezulu. Ku-sulfuric acid, zombili zinhle kakhulu. I-Alloy 28 ibiza kancane. I-904L ivame kakhulu ezitshalweni ze-asidi zaseNyakatho Melika; I-Alloy 28 ngokwezincazelo zaseYurophu.
Umbuzo 7: Ungakwazi yini ukunikeza ipayipi elimbozwe ngo-904L elinesisekelo se-A333 Gr.6 ukuze uthole isevisi yokushisa okuphansi?
A: Yebo. I-904L ihlala ithambile ekushiseni okuphansi; i-A333 Gr.6 backing ihlolwe ngokushaya ku--45°C. Le nhlanganisela ifanele amapayipi e-arctic acid (akuvamile kodwa kungenzeka).
Umbuzo 8: Ingabe uyaqinisekisa ukuthi i-cladding ayinayo i-carbon steel encibilikisiwe?
A: Yebo. Inqubo yokubopha i-vacuum hot roll ivimbela i-oxidation futhi inciphise ukusabalala. Senza i-PMI ebusweni be-cladding ukuqinisekisa ukwakheka. Indawo yokuxuba ngokuvamile ingama-micron ambalwa kuphela futhi ayivezwa oketshezini.
Umbuzo 9: Iyini amandla ajwayelekile okukhiqiza e-904L cladding?
A: I-904L inamandla okukhiqiza angaba ngu-220 MPa (32 ksi) esimweni esifakwe i-annealed. Lokhu kungaphansi kune-carbon steel backing kodwa ubukhulu be-cladding buncane; i-carbon steel core ithwala ukucindezeleka kwe-hoop. Ngokuklama ingcindezi, sisebenzisa ubukhulu be-backing steel wall kuphela; i-cladding ibhekwa njengesibonelelo sokugqwala.
Umbuzo 10: Ingabe ninikeza iziphetho ezigobile ngebhotela elingu-904L?
A: Yebo. Singalungisa ama-bevel (30-35°, umhlaba ongu-1.6 mm) bese sifaka i-weld overlay (ibhotela) ye-Alloy 625 noma i-904L filler ebusweni be-bevel. Lokhu kuvimbela ukuncibilika kwe-904L cladding ngesikhathi sokushisela i-field girth.
Q11: Ungakwazi yini ukunikeza amashubhu e-U-bend e-904L aguqayo okushintshanisa ukushisa?
A: Yebo, ngepayipi elimbozwe ngomthungo (OD ≤168 mm). Sigoba ngokubandayo, sinciphise ukucindezeleka, futhi sigoba indawo ngo-100% NDT (PT noma ET). Ukugoba kwe-U kwezinsizakalo ze-asidi kuvamile ezitshalweni zamakhemikhali.
Q12: Nginga-oda kanjani inani elincane lesilingo?
A: Nikeza i-OD, i-core WT, ubukhulu be-cladding, ubude (m), kanye ne-backing steel grade. Sizocaphuna i-trial batch (isb., 50 kuya kumamitha ayi-100). Lindela intengo ephezulu ngobuningi obuncane.
9. Uhlu Lokuhlola Loku-oda Lwepayipi Elimboziwe Elingu-904L
Ukuze uqinisekise imininingwane efanele, sicela unikeze:
●Ibanga lensimbi elisekelayo(API 5L X52/60/65, SA-106 Gr.B, SA-210 Gr.C, A333 Gr.6, noma A335 P11/P22)
● Ububanzi bangaphandle (OD)futhiukujiya kodonga oluyinhloko
● ubukhulu be-cladding obungu-904L(kunconywa u-3.0 mm wesevisi ye-asidi)
● Ubude ngengxenye ngayinyefuthiubude obuphelele (amamitha)
● Indlela yokwenza(kushiselwe i-OD ≥219 mm; akunamthungo i-OD ≤168 mm)
● Izinga elisebenzayo(I-API 5LD, i-ASME, i-EN, noma imininingwane yekhasimende)
● Izinga lokuhlola(Uhlobo 3.1 olujwayelekile; Uhlobo 3.2 nomuntu wesithathu)
● Qeda ukuqeda(i-plain, beveled, beveled + 904L buttering)
● Isikhathi sokulethwa(Ichweba le-FOB China, ichweba le-CIF lokuya khona)
I-Womic Steel izophendula ngedatha yobuchwepheshe, isilinganiso sezentengiselwano, kanye nohlelo lwekhwalithi.
10. Xhumana ne-Womic Steel – Uchwepheshe Wepayipi Elimbozwe Nge-High Alloy
Uma ufuna i-Ipayipi elimbozwe ngomugqa ongu-316Lnganoma yisiphi isixhasi sensimbi esijwayelekile sekhabhoni noma se-alloy, xhumana nathi ukuze uthole ukubonisana kwamahhala kwezobuchwepheshe futhi akukho silinganiso sesibopho.
Iwebhusayithi: www.womicsteel.com
I-imeyili: sales@womicsteel.com
Ucingo / WhatsApp / WeChat:
UVictor: +86 15575100681
UJack: +86 18390957568
I-Womic Steel – Izixazululo zamapayipi ezimboziwe angu-316L ezenzelwe isevisi ye-CO₂, ibhoyila, i-heat exchanger, izinga lokushisa eliphansi, kanye nezinhlelo zokusebenza zokushisa okuphezulu.
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