1. Ƙarfe Mai Ƙarfi: Ƙarfin Masana'antu da Ƙarfin Kamfani
Womic Steel Group babbar masana'anta ce kuma mai fitar da kaya daga ƙasashen waje a duniya, wacce ta shafe sama da shekaru 20 tana da ƙwarewa wajen samar da bututun ƙarfe masu jure tsatsa. Cibiyar samar da bututun da aka yi da 904L ta musamman tana amfani da fasahohin walda masu ci gaba da yawa tare da tsauraran matakan sarrafa zafi da kuma maganin zafi bayan walda:
● Layin ERW (Walda Mai Juriya da Wutar Lantarki):Don diamita daga 6.35mm zuwa 610mm (1/4″ – 24″), kauri daga bango daga 0.5mm zuwa 12.7mm. Walda mai yawan mita tare da ƙarancin zafi (≤ 1.2 kJ/mm) don guje wa raba abubuwan da ke cikin ƙarfe mai yawa. Ya dace da bututun 904L masu ƙanana zuwa matsakaici.
●Layin EFW (Haɗakar Wutar Lantarki):Don diamita daga 219mm zuwa 1219mm (8″ – 48″), kauri daga bango daga 4.0mm zuwa 40mm. TIG (GTAW) mai cike SAW, ta amfani da ƙarfe mai cikawa (ERNiCrMo-3 ko ER385).
●Layin LSAW / SAWL don Babban Alloy:Don diamita daga 406mm zuwa 1219mm (16″ – 48″), kauri na bango har zuwa 40mm. Walda mai zurfi a cikin faranti 904L da aka naɗe tare da shigarwar zafi mai sarrafawa.
Duk bututun da aka haɗa da lita 904 ana yin su ne da maganin zafi (maganin zafi) a zafin 1050-1150°C sannan a kashe ruwa don narkar da duk wani mataki na biyu da kuma dawo da juriyar tsatsa, sannan a yi amfani da gaurayen acid na musamman.
Takaddun Shaida na Inganci & Bin Dokoki:
●ISO 9001: Takaddun shaida na 2015
●PED 2014/68/EU (CE Mark) don kayan aikin matsi
●EN 10204 3.2 Takaddun shaida tare da tabbatarwa ta ɓangare na uku (TÜV, BV, SGS, LR)
●Binciken Bangare na Uku (TPI) wanda SGS, BV, ABS, DNV, TÜV suka amince da shi
●NACE MR0175 / ISO 15156 don sabis mai tsami (H₂S) idan an buƙata
●Lambar Boiler da Matsi ta ASME (Sashe na VIII, Raba ta 1) idan an buƙata
Kamfanin Womic Steel yana samar da bututun da aka haɗa da lita 904 ga ƙasashe sama da 30 a fannin sinadarai, na ruwa, da kuma na ƙasashen waje.
Sauƙin Samarwa:
●ERW: 6.35–610mm OD × 0.5–12.7mm WT × ≤ 12m
●EFW: 219–1219mm OD × 4.0–40mm WT × ≤ 12m (ya fi tsayi idan an buƙata)
●LSAW: 406–1219mm OD × 6.0–40mm WT × ≤ 18m
●Zaɓuɓɓukan gamawa: An rufe da kuma an yayyanka, mai haske a rufe (don ƙananan bututu)
2. ASTM B673 UNS N08904: Tsarin Kayan Aiki da Halayen Aiki
UNS N08904 (904L) ƙarfe ne mai ƙarfi na austenitic wanda ke da babban nickel (23-28%), babban chromium (19-23%), molybdenum (4-5%), da kuma jan ƙarfe (1-2%). Ƙarin jan ƙarfe yana ba da juriya ta musamman ga rage acid kamar sulfuric da phosphoric acid. Babban molybdenum da chromium suna ba da juriya mai kyau ga rami a cikin yanayin chloride. Sau da yawa ana amfani da 904L azaman madadin ƙarfe mai rahusa ga ƙarfe na nickel a cikin yanayi mai tsauri.
Sinadaran da Aka Haɗa (Binciken Ladle, kashi ta hanyar nauyi):
| Sinadarin | UNS N08904 (904L) | 316L (don kwatantawa) |
| C | ≤ 0.020 | ≤ 0.030 |
| Mn | ≤ 2.00 | ≤ 2.00 |
| P | ≤ 0.040 | ≤ 0.045 |
| S | ≤ 0.030 | ≤ 0.030 |
| Si | ≤ 1.00 | ≤ 1.00 |
| Cr | 19.0 – 23.0 | 16.0 – 18.0 |
| Ni | 23.0 – 28.0 | 10.0 – 14.0 |
| Mo | 4.0 – 5.0 | 2.0 – 3.0 |
| Cu | 1.0 – 2.0 | — |
| Fe | Daidaito | Daidaito |
Kayayyakin Inji (Zafin Ɗaki, An Haɗa Maganin):
| Kadara | UNS N08904 (904L) |
| Ƙarfin Yawa (ƙananan, kashi 0.2%) | 220 MPa (31,900 psi) |
| Ƙarfin Tauri (minti) | 490 MPa (71,100 psi) |
| Tsawaita (ma'auni, ma'aunin mm 50) | Kashi 35% |
| Tauri (max) | 90 HRB |
Sifofin Jiki:
Yawa: 8.00 g/cm³
Modulus na Juyawa: 195 GPa (28.3 × 10⁶ psi)
Matsakaicin wutar lantarki: 12.0 W/m·K a 100°
Ma'aunin Faɗaɗawar Zafi: 15.4 × 10⁻⁶/°C (20-100°C)Juriyar Tsatsa:
Matsakaicin Juriya na Pitting (PREN) = Cr% + 3.3(Mo%) + 16(N%) ≈ 35-40 (vs 316L PREN 24-26)
Kyakkyawan juriya ga sulfuric acid a cikin kewayon taro mai yawa (har zuwa 90% a yanayin zafi mai matsakaici)
Kyakkyawan juriya ga phosphoric acid (tsarin danshi) wanda ya ƙunshi chlorides da fluorides
Kyakkyawan juriya ga tsatsa da tsatsa a cikin mahalli na chloride
Kyakkyawan juriya ga tsatsa bayan walda (ƙarancin carbon)
Ya dace da amfani da tsami (NACE MR0175) tare da maganin zafi mai kyau
Iyakokin Tsabta (Kimanin):
● Sulfuric acid (H₂SO₄): har zuwa 90% a 50°C; har zuwa 70% a 100°C
● Hydrochloric acid (HCl): an iyakance shi ga narkewa (< 5%) a zafin ɗaki
● Acid na Phosphoric (H₃PO₄): mai kyau har zuwa 85% a 100°C
● Acetic acid: yayi kyau sosai a duk wani abu mai yawa
● Ruwan teku: yayi kyau a yanayin zafi har zuwa 50°C
3. Tsarin Girma da Bin Ka'idoji
| Abu | Ƙayyadewa |
| Daidaitacce | ASTM B673 / ASME SB-673 (bututun da aka haɗa da walda) |
| Tsarin Masana'antu | ERW, EFW, da LSAW |
| Nisan Diamita na Waje | ERW: 6.35 - 610mm; EFW/LSAW: 219 - 1219mm |
| Nisan Kauri na Bango | ERW: 0.5 - 12.7mm; EFW/LSAW: 4.0 - 40mm |
| Tsarin Jadawali | 5S, 10S, 40S (don NPS 1/8″ – 48″) |
| Nisan Tsawon | Daidaitacce: 6m; An tsawaita: 12m, 18m, har zuwa 18m |
| Ƙarshen Ƙarshe | Ƙarshen da aka Fito (PE), Ƙarshen da aka Yi Beveled (BE) |
| Ƙarshen Fuskar | An yi wa ado da kuma an yi wa ado da kyau, an yi wa ado da kyau |
| Juriya | OD: ±0.5% ko ±3.2mm; WT: ±12.5% (ga kowace ASTM B775); Tsawon: +50mm / -0mm |
4. Girman da ake da su da kuma ƙayyadaddun bayanai – ASTM B673 UNS N08904 Bututun Bakin Karfe Mai Walda (Girman da aka zaɓa)
| NPS | OD (mm) | Jadawalin Jadawalin | WT (mm) | Nauyi (kg/m) | Tsawon Daidaitacce | Aikace-aikacen da Aka saba |
| 1/2" | 21.3 | 10S | 2.11 | 1.00 | 6m | Yawan sinadaran magani |
| 3/4" | 26.7 | 10S | 2.11 | 1.28 | 6m | Layin kayan aiki |
| 1" | 33.4 | 10S | 2.77 | 2.09 | 6m | Abincin acid |
| 1-1/2" | 48.3 | 10S | 2.77 | 3.11 | 6m | Layin sinadarin sulfuric |
| 2" | 60.3 | 10S | 2.77 | 3.93 | mita 6 / mita 12 | Layin tsari |
| 3" | 88.9 | 10S | 3.05 | 6.46 | mita 6 / mita 12 | Canja wurin acid |
| 4" | 114.3 | 10S | 3.05 | 8.37 | mita 6 / mita 12 | Acid na Phosphoric |
| 6" | 168.3 | 10S | 3.40 | 13.8 | mita 6 / mita 12 | Sanyaya ruwan teku |
| 8" | 219.1 | 10S | 3.76 | 20.0 | mita 12 | Layin tsami na bakin teku |
| 10" | 273.0 | 10S | 4.19 | 27.8 | mita 12 | Wurin fitar da FGD |
| 12" | 323.9 | 10S | 4.57 | 36.0 | mita 12 | Babban sinadaran |
| 16" | 406.4 | 10S | 4.78 | 47.4 | mita 12 | Babban diamita |
*Akwai ma'aunin da aka keɓance a wajen waɗannan jeri. Bututun da aka haɗa da lita 904 suna buƙatar tsawon lokacin ja (mafi ƙarancin kwanaki 60) saboda takamaiman tsiri/faranti.*
5. Ma'auni da Maki na Musamman na Super Austenitic da Womic Steel ta ƙera
| Daidaitacce | Karfe / Alloy maki | Aikace-aikacen da Aka saba | Tsarin Walda |
| ASTM B673 | UNS N08904 (904L) | Sulfuric/phosphoric acid, ruwan teku | EFW/LSAW/ERW |
| ASTM B674 | UNS N08904 (ba tare da sumul ba) | Bututun matsi | - |
| ASTM B677 | UNS N08904 | Bututu mara sumul | - |
| EN 10217-7 | 1.4539 (904L) | Matsi, super austenitic | SAW/ERW |
| ASTM A312 | UNS N08367 (AL-6XN), S31254 (254 SMO) | Ruwan Teku, FGD | EFW/LSAW |
Amfani:Tsirrai masu sinadarin Sulfuric, samar da sinadarin phosphoric, tsarin FGD, sanyaya ruwan teku (zafin jiki mai yawa), tankunan sinadarai, da kuma ayyukan tsami a teku.
6. Tsarin Kera - Bututun Bakin Karfe Mai Walda (ERW, EFW, LSAW)
Walda ta 904L tana buƙatar kulawa sosai kan shigar da zafi da kuma maganin zafi bayan walda saboda yawan sinadarin da ke cikinta. Tagulla da molybdenum suna sa walda ta zama mai sauƙin rabuwa idan sanyaya ta yi jinkiri sosai.
Tsarin Walda Mai Juriya da Wutar Lantarki (ERW) – Ƙarami zuwa Matsakaicin Diamita (6.35–610mm OD):
●Duba Kayan Danye (Teri/Coil):An tabbatar da cewa an haɗa tsiri mai lamba 904L (Ni 23-28%, Cr 19-23%, Mo 4-5%, Cu 1-2%). Kowace na'ura tana da lambar zafi ta musamman.
●Buɗewa da Daidaita Daidaito
●Gyaran Gefen Zaren ...
●Ƙirƙira:Ci gaba da yin birgima.
●Walda Mai Yawan Mita:Ƙaramin shigar zafi (≤ 1.2 kJ/mm) don guje wa rabuwar Cu/Mo. Walda a cikin yanayi mara aiki.
●Ruwan ɗaurewa:Cire ruwa daga famfo sannan a kashe shi.
●Girman da Daidaitawa
●Yankan Zuwa Tsawon
●NDT:Gwajin halin yanzu na Eddy (100%) + zaɓin UT.
●Maganin rufewa (Cikakken Bututu):1050-1150°C, kashe ruwa. Dole ne a narkar da matakai na biyu.
●Gwajin Hydrostatic
●Pickling & Passivation(musamman gaurayen acid don haɗakar ƙarfe)
●PMI (XRF) & Duba Tauri
●Dubawa da Alamar Ƙarshe
Tsarin EFW (Haɗakar Wutar Lantarki) – Babban Diamita (219–1219mm OD, 4.0–40mm WT):
●Shirin Faranti:Farantin 904L, gefuna an yi musu bevel (X bevel).
●Tsarin Naɗi
●Walda a Tackle
●Tushen Hanyar TIG (GTAW):Mai cikawa mai dacewa (ERNiCrMo-3 ko ER385), iskar argon mai goyan baya.
●Cika da Murfi na SAW:Shigar da zafi ≤ 1.5 kJ/mm, zafin shiga tsakanin ≤ 120°C. Ruwan da ke gudana a ƙasa da sulfur na musamman.
●Walda ta Ciki
●Gwajin Radiography 100% + UT(bisa ga ASTM B775)
●Maganin Rufewa:Cikakken maganin zafi na bututu (1050-1150°C), kashe ruwa.
●Pickling & Passivation
●Gwajin Hydrostatic
●Binciken PMI & Girma
●Alamar
Tsarin LSAW don Babban Alloy - Girman Diamita Mai Girma (406–1219mm OD, 6.0–40mm WT):
● UOE ko JCOE da ke samuwa daga farantin 904L
● Walda mai gefe biyu ta SAW tare da tsarin sarrafa zafi mai tsauri
● Cikakken maganin shafawa bayan walda
Mahimman Mahimman Mahimman Mahimman Ma'auni don Walda 904L:
● Shigar da zafi: ≤ 1.5 kJ/mm (maƙasudin ≤ 1.2 kJ/mm)
● Zafin jiki na Interpass: ≤ 120°
● Iskar gas mai kariya: 100% Argon tare da mai karɓar iskar oxygen
● Rufe ruwan da aka tace: 1050-1150°C, kashe ruwa - dole ne
● Pickling: Cakuda mai acid na musamman don ƙarfe mai yawan chromium/nickel
7. Tsarin Kula da Inganci da Gwaji don Bututun Bakin Karfe na ASTM B673 UNS N08904 da aka Walda
| Matakin mataki | Hanyar Dubawa | Manufa |
| Albarkatun kasa | Binciken Sinadarai (OES ko ICP) | Tabbatar da N08904 (Ni 23-28%, Cr 19-23%, Mo 4-5%, Cu 1-2%) |
| Albarkatun kasa | Gwajin Taurin Kai | Yawan aiki ≥ 220 MPa, Tashin hankali ≥ 490 MPa |
| Albarkatun kasa | Gwajin Tsatsa (ASTM G28) | Juriyar Tsatsa Tsakanin Granular (don hidimar acid) |
| Albarkatun kasa | Lissafin PREN | Tabbatar da PREN ≥ 35 |
| A Cikin Aiki | Kula da Shigar da Zafi | ≤ 1.5 kJ/mm |
| A Cikin Aiki | Zafin Zafin Tsakiyar Wuri | ≤ 120°C |
| Walda (ERW) | Eddy Current (100%) | daidaiton walda |
| Walda (EFW/LSAW) | 100% UT (ko PAUT) | Gano lahani na walda |
| Walda (EFW/LSAW) | RT (10-100% a kowace takamaiman bayani) | Ingancin walda |
| Walda | Rini Mai Shiga Jiki (PT) | Fashewar saman |
| Bayan An Shafa Maganin | Gwajin Tauri | ≤ 90 HRB |
| Bayan An Shafa Maganin | Tsarin Ƙwaƙwalwa (ASTM E407) | Babu sigma, chi, ko matakai na biyu |
| Bututun da aka gama | Gwajin Hydrostatic | Ingancin matsin lamba |
| Bututun da aka gama | PMI (XRF) | Tabbatar da daraja (Ni, Cr, Mo, Cu) |
| Bututun da aka gama | Gwajin Tsabtace Tsabta (ASTM G48) | Tabbatar da juriyar ramuka (idan an ƙayyade) |
| Bututun da aka gama | Na gani & Alamar | Bin diddigin abubuwa |
Gwaje-gwaje na Zaɓaɓɓu don Ayyukan Mahimmanci:
● ASTM G28 Practice A (ferric sulfate-sulfuric acid) don tsatsa tsakanin granular
● Gwajin gwajin ASTM G48 a cikin FeCl₃ (6% a 40°C) don hidimar ruwan teku
● Gwajin HIC/SSC don maganin tsami (NACE TM0284, TM0177)
● Gwajin jan ƙarfe sulfate don rage juriya ga acid
8. Babban Aikace-aikace - ASTM B673 UNS N08904 Bututun Bakin Karfe Mai Walda
●Tsire-tsire masu sinadarin sulfuric:Yana sarrafa sinadarin acid mai ƙarfi (90-98% H₂SO₄) a matsakaicin zafin jiki, yana rage acid (5-10%) a yanayin zafi mai yawa, da kuma bututun sanyaya acid. Yana maye gurbin 316L da 317L.
●Samar da sinadarin phosphoric acid (tsarin danshi):Masu fitar da iska, masu sanyaya walƙiya, da layukan canja wuri waɗanda ke sarrafa sinadarin phosphoric acid tare da chlorides da fluorides. 904L daidaitacce ne ga sinadarin phosphoric acid mai ruwa-ruwa.
●Bututun fitar da iskar gas mai narkewa (FGD):A ƙasan ma'adinan shaye-shaye inda akwai iskar gas mai ɗauke da sinadarin chloride. Ana amfani da 904L don bututun fitar da iska da kuma layukan tara inda 317L bai isa ba.
●Tsarin sanyaya ruwan teku (zafin jiki mai yawa):Tsarin ruwan sanyaya na bakin teku inda zafin ruwan teku ya wuce digiri 40 na Celsius. 904L yana hana ruwa shiga yanayin zafi inda 316L har ma da super duplex na iya gazawa.
●Tankunan sinadarai (IMO Type II):Bututun ɗaukar kaya don sinadarai masu ƙarfi, gami da sulfuric acid, phosphoric acid, da kuma Organic acid. Kamfanonin jigilar sinadarai da yawa sun amince da 904L.
●Sabis mai tsami na bakin teku:Samar da mai da iskar gas tare da yawan H₂S da yawan chlorides, musamman inda zafin jiki yake matsakaici amma buƙatun tsatsa sun wuce duplex.
●Masana'antar bleach na tarkacen ja da takarda:Sabis na chlorine dioxide da sodium hypochlorite inda 317L bai isa ba.
●Kayan aikin magunguna:Masu amsawa da bututun ruwa don hanyoyin da suka shafi acid mai ƙarfi.
●Kayan aikin rini na yadi:Injinan rini da ke sarrafa rini mai sinadarin chlorine.
●Sarrafa abinci:Ruwan 'ya'yan itace mai yawan chloride, ruwan 'ya'yan itace mai tsami, da kuma kayayyakin abinci masu ɗauke da sinadarin acid.
9. Marufi da jigilar kaya - JIS A5525 SKK490 SSAW Karfe Bututun Tarin
Marufi:
●Kariyar hana lalata:Naɗe filastik ko takardar VCI. Babu ragowar mai don aikin sinadarai.
●Ƙarshen maƙallan:Murfin filastik masu nauyi (wanda aka yi masa laƙabi da launi - yawanci shuɗi ne na 904L).
●Haɗawa (Ƙananan diamita):Kowace bututu an naɗe ta daban-daban, sannan a haɗa ta da madauri marasa ƙarfe.
●Marufi ɗaya ɗaya (Babban diamita):Naɗe fim ɗin filastik tare da zoben kumfa.
●Akwatunan katakodon muhimman ayyukan sinadarai da na ƙasashen waje.
Jigilar kaya:
Kwantena masu girman ≤ 610mm, masu girman break-bull don manyan diamita.
Takardu:MTC 3.1/3.2, rahoton gwajin hydro, rahotannin UT/RT, rahoton PMI, rahoton gwajin tsatsa (idan an ƙayyade), rahoton girma, jerin marufi, COO. Cikakken bin diddigin bayanai daga lambar zafi zuwa bututun da aka gama.
10. Amfanin Karfe da Tambayoyin da Ake Yawan Yi – ASTM B673 UNS N08904 Bututun Walda
Me Yasa Za A Yi Haɗin Gwiwa Da Womic Steel Don Bututun Welded 904L?
● Cikakken Girman: ERW 1/4″ – 24″, EFW/LSAW 8″ – 48″.
● Cikakkiyar maganin rage zafi bayan walda (1050-1150°C, kashe ruwa).
● Gwajin tsatsa a cikin gida (ASTM G28, G48) don hidimar acid da ruwan teku.
● PREN ≥ 35 - kyakkyawan juriya na rami.
● Lokacin gasa: kwanaki 60-75 don ERW, kwanaki 75-90 don EFW/LSAW.
● Takaddun shaida na Duniya: ISO 9001, PED (CE), EN 10204 Nau'in 3.2.
Tambayoyin da Ake Yawan Yi (Tambayoyin da Ake Yawan Yi) – ASTM B673 UNS N08904 Bututun Walda
T: Menene bambanci tsakanin 904L da 316L?
A: 904L yana da nickel mai yawa (23-28% vs 10-14%), chromium mai yawa (19-23% vs 16-18%), molybdenum mai yawa (4-5% vs 2-3%), da kuma ƙarin jan ƙarfe (1-2%). Wannan yana ba da juriya ga 904L mafi kyau ga sulfuric acid, phosphoric acid, da kuma ɗimbin chlorides. PREN shine 35-40 vs 24-26 ga 316L. 904L yana da kusan sau 3-4 na farashin 316L kuma ana amfani da shi inda 316L ya gaza.
T: Shin 904L ya dace da hidimar ruwan teku?
A: Eh. 904L yana da kyakkyawan juriya ga tsatsa da kuma tsatsa a cikin ruwan teku har zuwa yanayin zafi na kimanin 50°C. Don yanayin zafi mai yawa ko yanayin da ba ya tsayawa, ana iya buƙatar ƙarfe mai ƙarfi ko nickel. Sau da yawa ana amfani da 904L don tsarin sanyaya ruwan teku inda 316L ya gaza.
T: Menene matsakaicin zafin aiki na 904L a cikin sinadarin sulfuric?
A: A cikin 50-70% H₂SO₄, ana iya amfani da 904L har zuwa 100°C. A cikin 90-96% H₂SO₄, iyakance zuwa 50-60°C. Don yanayin zafi mafi girma ko ƙarin acid mai yawa, ana buƙatar ƙarfe masu yawa na nickel (Alloy 20, Alloy 625, Alloy C-276). Koyaushe duba jadawalin tsatsa don takamaiman yanayi.
T: Shin 904L yana buƙatar annealing na maganin bayan walda?
A: Eh, bisa ga ASTM B673. 904L na iya samar da matakai na biyu (sigma, chi) a cikin walda HAZ idan sanyaya ta yi jinkiri. Ruwan da ke ƙarawa a zafin 1050-1150°C sannan kuma ruwan da ke kashewa yana narkar da waɗannan matakai kuma yana dawo da juriyar tsatsa. Womic yana yin cikakken aikin ƙarawa a kan dukkan bututun da aka haɗa da 904L. Don walda a filin, yi amfani da ƙarancin zafi kuma ka yi la'akari da ƙarawa a bayan walda idan zai yiwu.
T: Wane ƙarfe mai cike walda aka ba da shawarar don 904L?
A: Ana ba da shawarar AWS A5.14 ERNiCrMo-3 (Inconel 625) ko ER385. Ana amfani da ERNiCrMo-3 akai-akai kuma yana ba da juriya mai kyau ga tsatsa wanda ya dace da 904L. ER385 takamaiman cikawa ne mai daidaitawa na 904L. Womic tana amfani da ERNiCrMo-3 don ayyukan EFW.
T: Shin 904L ya dace da amfani da tsami (H₂S)?
A: Eh, an cancanci 904L bisa ga NACE MR0175/ISO 15156 don yin amfani da tsami tare da matsin lamba na H₂S har zuwa sandar 1 (15 psi) a cikin takamaiman kewayon tauri. Sau da yawa ana amfani da shi a cikin filayen tsami mai matsakaici inda duplex bai isa ba saboda yawan chlorides.
T: Menene lokacin jagora na yau da kullun don bututun 904L da aka ƙera?
A: Kwanaki 60-75 na ERW (ƙananan diamita zuwa matsakaici), kwanaki 75-90 na EFW/LSAW (babban diamita). Lokacin jagora ya fi na ƙarfe na bakin ƙarfe na yau da kullun saboda takamaiman tsiri/faranti na ƙarfe (sau da yawa makonni 12-16 daga injin niƙa). Dubawa na ɓangare na uku yana ƙara kwanaki 7-14.
T: Za a iya amfani da 904L don tsarin ruwa mai tsafta?
A: Eh, amma yawanci ana yin bayani sosai. Ga ruwa mai tsafta (RO, DI, WFI), 316L ya isa kuma ya fi araha. An tanada 904L don yanayi mai tsanani na sinadarai ko kuma yawan sinadarin chloride.
Nassoshi kan Aikin - Sauya Bututun Mai Sanyaya Acid na Turai
Ƙasa:Jamus (North Rhine-Westphalia, hadaddun sinadarai)
Daidaitacce & Matsayi:ASTM B673 UNS N08904 (904L) - bututun da aka haɗa
Girma da Adadi:
● OD 88.9mm (3″) × Jadawalin 10S (3.05mm WT) – mita 600 (kimanin tan 5) – Tsarin ERW
● Tsarin OD 114.3mm (4″) × Jadawalin 10S (3.05mm WT) – mita 500 (kimanin tan 6) – Tsarin ERW
● OD 168.3mm (6″) × Jadawalin 10S (3.40mm WT) – mita 300 (kimanin tan 4) – Tsarin EFW
● OD 219.1mm (8″) × Jadawalin 10S (3.76mm WT) – mita 200 (kimanin tan 4) – Tsarin EFW
Jimilla:Mita 1,600, kimanin tan 19
Bayani dalla-dalla:Maganin ASTM B673 UNS N08904 da aka shafa a jiki kuma aka yi masa tsami, aka yanke ƙarshensa. Gwajin Hydrostatic a matsin lamba na ƙira na 1.5× (ƙirar 1.2 MPa). 100% UT don bututun EFW, wutar lantarki ta ERW. PMI akan kowane bututu. Gwajin lalata dole ne bisa ga ASTM G28 Practice A (ferric sulfate-sulfuric acid) - ƙimar lalata < 5 mpy (an cimma 2-3 mpy). Gwajin lalata da aka yi bisa ga ASTM G48 Hanyar A (6% FeCl₃, awanni 24 a 40°C) - babu rami. Gwajin lalata tsakanin granular ga ASTM A262 Practice E (wucewa). Dubawa na ɓangare na uku ta TÜV Jamus.
Aikace-aikace:Sauya bututun sanyaya acid da layukan canja wurin da ke da alaƙa a cikin masana'antar sake farfaɗo da acid ɗin sulfuric. Bututun yana ɗaukar acid mai zafi mai sulfuric (85-93% H₂SO₄) a zafin 70-90°C daga hasumiyar shaye-shaye zuwa mai sanyaya acid. Bututun da suka gabata na lita 316 sun lalace bayan watanni 18 saboda tsatsa da kuma ramuka. An zaɓi 904L saboda juriyarsa ga sinadarin sulfuric mai ƙarfi a yanayin zafi mai yawa.
Kalubalen Fasaha da Magani:
●Tsatsa a cikin sinadarin sulfuric mai zafi mai yawa (85-93%, 70-90°C)– 316L yana lalata a ƙimar fiye da 50 mpy a ƙarƙashin waɗannan yanayi. 904L tare da babban nickel, chromium, molybdenum, da jan ƙarfe yana ba da ƙimar tsatsa < 5 mpy. An yi gwajin ASTM G28 Practice A akan samfuran ƙarfe na tushe da walda. Yawan tsatsa: ƙarfe na tushe 2.1 mpy, walda 2.8 mpy - ƙasa da iyakar 5 mpy. An amince da abokin ciniki.
●Juriyar lalata ƙarfe ta walda– Walda ita ce yankin da ya fi rauni. Womic ta yi amfani da ƙarancin zafi (≤ 1.2 kJ/mm) da kuma cika ERNiCrMo-3. Samfuran walda sun wuce gwajin G28 tare da ƙimar tsatsa 2.8-3.2 mpy. Tsarin microstructure bai nuna wani ruwan sama na biyu ba.
●Juriyar juriya a yanayin zafi mai yawa– Asid ɗin yana ɗauke da sinadarin chloride (daga tushen ruwa). PREN 35-40 na 904L yana ba da juriya ga rami. An yi gwajin ramin G48 a 40°C (ya fi zafin aiki tsanani fiye da 70°C? A zahiri zafin gwajin 40°C ya yi ƙasa, amma FeCl₃ yana da ƙarfi). Sakamako: babu rami bayan awanni 72.
●Tsatsa tsakanin granular bayan walda– 904L yana da ƙarancin carbon (≤ 0.020%), amma har yanzu ana buƙatar a yi a yi a yi a yi a yi a yi a yi a 1100°C, sannan a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a yi a gwajin ASTM A262 Practice E.
●Tsarin walda a fili– Ƙungiyar kula da masana'antar tana buƙatar WPS mai ƙwarewa don gyarawa. Womic ta samar da takardun shaida guda 15 na walda tare da WPS ta amfani da GTAW, ERNiCrMo-3, dumama 10-20°C, interpass ≤ 120°C, shigarwar zafi ≤ 1.2 kJ/mm. Takardun shaida sun wuce gwajin RT, PT, da G28.
●Lantarki zuwa masana'antar sinadarai ta Jamus– An aika bututu daga Shanghai zuwa tashar jiragen ruwa ta Hamburg, sannan aka kai su wurin. TÜV Jamus ta duba bututun da ke Hamburg. An kawo dukkan tan 19 cikin makonni 10. Kunshin takardu (MTC 3.2, rahotannin gwaji) an isar da shi ta hanyar lantarki.
Sakamako:An sanya sabon bututun 904L a lokacin da aka fara aiki a kwata na uku na 2024. Bayan watanni 12 na aiki, binciken ya nuna babu tsatsa mai aunawa, babu rami, kuma babu ɓuɓɓuga. Abokin ciniki yana tsammanin tsawon shekaru 15+ na aiki (idan aka kwatanta da shekaru 1.5 na 316L). Womic Steel yanzu ta zama mai samar da bututun sabis na sulfuric acid na wannan masana'antar sinadarai.
Tuntuɓi:
Yanar Gizo: www.womicsteel.com
Imel: sales@womicsteel.com
Waya / WhatsApp / WeChat:
Victor: +86 15575100681
Jack: +86 18390957568
Womic Steel – Abokin hulɗarka mai aminci ga ASTM B673 UNS N08904 bututun ƙarfe masu walda da aka haɗa don tsire-tsire masu sinadarin sulfuric da phosphoric acid, tsarin FGD, sanyaya ruwan teku, da kuma ayyukan sinadarai masu ƙarfi a duk duniya.
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