1. Womic Steel: Ngā Pūkenga Hanga me te Kaha o te Kamupene
He kaihanga matua a Womic Steel Group, he kaihokohoko hoki o te ao, ā, neke atu i te 20 tau o tōna mōhiotanga ki te hanga paipa koranu ātete-waikura. E whakamahi ana tā mātou whare hanga paipa whakarewa 904L motuhake i ngā hangarau whakarewa matatau maha me te whakahaere pakari i te whakauru wera me te maimoatanga wera i muri i te whakarewa:
● Raina ERW (Whakarewa Ātete Hiko):Mō ngā diameters mai i te 6.35mm ki te 610mm (1/4″ – 24″), ko te matotoru o te pakitara mai i te 0.5mm ki te 12.7mm. He whakarewa auau-teitei me te whakaurunga wera iti (≤ 1.2 kJ/mm) hei karo i te wehewehe i te ihirangi koranu teitei. He pai mō ngā paipa 904L diameter iti ki te reo.
●Raina EFW (Whakarewa Hiko):Mō ngā diameters mai i te 219mm ki te 1219mm (8″ – 48″), ko te matotoru o te pakitara mai i te 4.0mm ki te 40mm. Te urunga pakiaka TIG (GTAW) me ngā urunga whakakī SAW, mā te whakamahi i te konganuku whakakī ōrite (ERNiCrMo-3, ER385 rānei).
●Raina LSAW / SAWL mō te Koranu Teitei:Mō ngā diameter mai i te 406mm ki te 1219mm (16″ – 48″), ko te matotoru o te pakitara tae atu ki te 40mm. Te whakarewatanga pewa ruku o ngā pereti 904L kua hurihia me te whakaurunga wera whakahaere.
Ka whakamahanahia ngā paipa whakarewa 904L katoa i te 1050-1150°C, ā, ka tineihia ki te wai hei whakarewa i ngā wāhanga tuarua me te whakaora i te ātete ki te waikura, ā, muri iho ka whakamākūkūhia me te whakakorekore ki ngā ranunga waikawa motuhake.
Ngā Tiwhikete Kounga me ngā Whakatutukitanga Ture:
●Kua Whakamanahia te ISO 9001:2015
●PED 2014/68/EU (Tohu CE) mō ngā taputapu pēhanga
●EN 10204 3.2 Tiwhikete me te whakamanatanga a te hunga tuatoru (TÜV, BV, SGS, LR)
●Tirotiro-Tuatoru (TPI) kua whakaaetia e SGS, BV, ABS, DNV, TÜV
●NACE MR0175 / ISO 15156 mō te ratonga kawa (H₂S) ina tonoa mai
●Te Ture mō te Ipu Pēhanga me te Poiha ASME (Wāhanga VIII, Wehenga 1) ina tonoa
E tuku ana a Womic Steel i ngā paipa whakarewa 904L ki ngā whenua neke atu i te 30 puta noa i ngā ahumahi matū, moana, me te takutai moana.
Ngāwari o te Whakaputa:
●ERW: 6.35–610mm OD × 0.5–12.7mm WT × ≤ 12m
●EFW: 219–1219mm OD × 4.0–40mm WT × ≤ 12m (roa ake mēnā ka tonoa)
●LSAW: 406–1219mm OD × 6.0–40mm WT × ≤ 18m
●Ngā kōwhiringa whakaoti: Kua whakawerahia, kua whakatōkia ki te wai wera, kua whakawerahia ki te wai wera kanapa (mō ngā ngongo iti)
2. ASTM B673 UNS N08904: Te Hanganga o ngā Rauemi me ngā Āhuatanga Mahi
Ko te UNS N08904 (904L) he maitai kore waikura tino austenitic me te nikara teitei (23-28%), te chromium teitei (19-23%), te molibdenum (4-5%), me te parahi (1-2%). Mā te tāpiri parahi ka tino ātete ki ngā waikawa whakaiti pēnei i te waikawa whanariki me te waikawa phosphoric. Mā te molibdenum teitei me te chromium ka tino ātete ki te pakaru i roto i ngā taiao pūhaumāota. He maha ngā wā ka whakamahia te 904L hei whakakapi utu-pai mō ngā koranu nikara i roto i ngā āhuatanga kaha-āhua.
Te Hanganga Matū (Tātaritanga Koro, % mā te papatipu):
| Huānga | UNS N08904 (904L) | 316L (hei whakataurite) |
| 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 | Taurite | Taurite |
Ngā Āhuatanga Ā-ringa (Pāmahana Rūma, Wairewa Kua Whakawerahia):
| Taonga | UNS N08904 (904L) |
| Kaha Hua (iti rawa, 0.2% te rerekētanga) | 220 MPa (31,900 psi) |
| Kaha Kume (min) | 490 MPa (71,100 psi) |
| Te roa (iti rawa, 50mm te ine) | 35% |
| Te pakeketanga (mōrahi) | 90 HRB |
Ngā Āhuatanga Ā-tinana:
Kiato: 8.00 karamu/cm³
Te Tauwehenga o te Āhuatanga: 195 GPa (28.3 × 10⁶ psi)
Te Arahi Wera: 12.0 W/m·K i te 100°
Tauwehenga o te Whakawhanuitanga Wera: 15.4 × 10⁻⁶/°C (20-100°C)Ātete ki te Waikura:
Tau Ōrite Te Taurite Tau (PREN) = Cr% + 3.3(Mo%) + 16(N%) ≈ 35-40 (vs 316L PREN 24-26)
He ātete tino pai ki te waikawa whanariki puta noa i te whānuitanga kukū (tae atu ki te 90% i ngā pāmahana reo)
He ātete tino pai ki te waikawa phosphoric (tukanga mākū) kei roto ko te chloride me te fluorides
He ātete pai ki te waikura o te poka me te kapiti i roto i ngā taiao hauota
He ātete pai ki te waikura intergranular i muri i te whakarewa (waro iti)
He pai mō te mahi kawa (NACE MR0175) me te maimoatanga wera tika
Ngā Herenga Waikura (Tāpiri):
● Waikawa whanariki (H₂SO₄): tae atu ki te 90% i te 50°C; tae atu ki te 70% i te 100°C
● Waikawa hauwai (HCl): he iti noa iho ki te waimeha (< 5%) i te pāmahana rūma
● Waikawa whākawa (H₃PO₄): tino pai tae atu ki te 85% i te 100°C
● Waikawa acetic: tino pai i ngā kukū katoa
● Wai moana: tino pai i ngā pāmahana tae atu ki te 50°C
3. Te Awhe Ahu me te Whakatutukitanga Paerewa
| Taonga | Whakatakotoranga |
| Paerewa | ASTM B673 / ASME SB-673 (paipa whakarewa) |
| Ngā Tukanga Hanga | ERW, EFW, LSAW |
| Awhe Diameter o Waho | ERW: 6.35 – 610mm; EFW/LSAW: 219 – 1219mm |
| Awhe Matotoru o te Pakitara | ERW: 0.5 – 12.7mm; EFW/LSAW: 4.0 – 40mm |
| Awhe Whakarite | 5S, 10S, 40S (mō NPS 1/8″ – 48″) |
| Awhe Roa | Paerewa: 6m; Whakaroa: 12m, 18m, tae atu ki te 18m |
| Whakamutunga Whakamutunga | Pito Maamaa (PE), Pito Whakapiko (BE) |
| Whakaotinga Mata | Kua whakawerahia, kua whakamātaohia, kua kanapa kua whakawerahia |
| Ngā Manawanui | OD: ±0.5% ±3.2mm rānei; Taumaha: ±12.5% (mō ia ASTM B775); Roa: +50mm / -0mm |
4. Ngā Ahu me ngā Whakatakotoranga e Wātea ana – Paipa Kowiri tira ASTM B673 UNS N08904 (Ngā Rahi Noa kua Tīpakohia)
| NPS | Ō (mm) | Rārangi Mahi | Taumaha (mm) | Taumaha (kg/m) | Roa Paerewa | Te Whakamahinga Noa |
| 1/2″ | 21.3 | 10S | 2.11 | 1.00 | 6m | Te inenga matū |
| 3/4″ | 26.7 | 10S | 2.11 | 1.28 | 6m | Raina taputapu |
| 1 inihi | 33.4 | 10S | 2.77 | 2.09 | 6m | Whāngai waikawa |
| 1-1/2″ | 48.3 | 10S | 2.77 | 3.11 | 6m | Raina waikawa whanariki |
| 2 inihi | 60.3 | 10S | 2.77 | 3.93 | 6m / 12m | Raina tukanga |
| 3 inihi | 88.9 | 10S | 3.05 | 6.46 | 6m / 12m | Te whakawhiti waikawa |
| 4 inihi | 114.3 | 10S | 3.05 | 8.37 | 6m / 12m | Waikawa whākawa |
| 6 inihi | 168.3 | 10S | 3.40 | 13.8 | 6m / 12m | Te whakamatao i te wai moana |
| 8 inihi | 219.1 | 10S | 3.76 | 20.0 | 12m | Raina kawa ki tai |
| 10 inihi | 273.0 | 10S | 4.19 | 27.8 | 12m | Putanga FGD |
| 12 inihi | 323.9 | 10S | 4.57 | 36.0 | 12m | Matū matua |
| 16 inihi | 406.4 | 10S | 4.78 | 47.4 | 12m | Te whānui nui |
*Kei te wātea ngā ine ritenga i waho atu i ēnei awhe. Me roa ake te wā arahi mō ngā paipa whakarewa 904L (iti rawa 60 rā) nā te mea he mea motuhake te kimi i ngā rīpene/pereti.*
5. Ngā Paerewa me ngā Taumata Austenitic Nui Noa i Hangaia e Womic Steel
| Paerewa | Ngā Tohu Rino / Koranu | Te Whakamahinga Noa | Tukanga Whakarewa |
| ASTM B673 | UNS N08904 (904L) | Waikawa whanariki/pūkawakawa, wai moana | EFW/LSAW/ERW |
| ASTM B674 | UNS N08904 (kore hononga) | Ngongo pēhanga | - |
| ASTM B677 | UNS N08904 | Paipa tuitui | - |
| EN 10217-7 | 1.4539 (904L) | Ngā kaupapa pēhanga, super austenitic | SAW/ERW |
| ASTM A312 | UNS N08367 (AL-6XN), S31254 (254 SMO) | Wai moana, FGD | EFW/LSAW |
Whakamahinga:Ngā tipu waikawa whanariki, te hanga waikawa phosphoric, ngā pūnaha FGD, te whakamatao wai moana (te pāmahana teitei), ngā kaipuke tāke matū, te ratonga kawa ki tai.
6. Tukanga Hanga – Paipa Kowiri tira i whakarewaina (ERW, EFW, LSAW)
Me āta whakahaere te whakarewa 904L i te wera e whakaurua ana, me te whakamahana i muri i te whakarewatanga nā te mea he nui te ihirangi koranu. Nā te parahi me te molybdenum ka ngawari te wehewehe i te koranu mena ka puhoi rawa te whakamatao.
Tukanga Whakarewa Ātete Hiko (ERW) – Te Diameter Iti ki te Waenga (6.35–610mm OD):
●Tirotiro Rauemi Mata (Rīpene/Koiri):Kua manatokohia te hanganga o te rīpene 904L (Ni 23-28%, Cr 19-23%, Mo 4-5%, Cu 1-2%). He motuhake te tau wera o ia koiri.
●Te Wetewete me te Whakatakotorite
●Te Tapahi Tapa
●Te Hanga:Te hanga hurihuri tonu.
●Te Whakarewa Auau-Teitei:He iti te wera e whakaurua ana (≤ 1.2 kJ/mm) hei karo i te wehewehenga o Cu/Mo. Te whakarewa i roto i te hau kore mahi.
●Te Whakamahana Tuitui:Te whakamahana ā-whakarewa, ā, muri iho ka tineia te wai.
●Te Rahi me te Whakatikatika
●Te tapahi ki te roa
●Te kore utu:Whakamātautau iahiko Eddy (100%) + UT kōwhiringa.
●Te Whakamahana Otinga (Paipa Katoa):1050-1150°C, tineia ki te wai. Me whakarewa ngā wāhanga tuarua.
●Whakamātautau Waipūmau
●Te Whakapūkara me te Whakakorekore(waikawa whakauru motuhake mō te koranu teitei)
●PMI (XRF) me te tirotiro mārō
●Tirotiro Whakamutunga me te Tohu
Tukanga EFW (Whakarewa Hiko Hiko) – Diameter Nui (219–1219mm OD, 4.0–40mm WT):
●Te Whakarite Pereti:Pereti 904L, he tapa kua whakapikoa (X whakapikoa).
●Te Hanga Rōra
●Te Whakarewa Taapiri
●Te Huarahi Pūtake TIG (GTAW):He whakakī ōrite (ERNiCrMo-3, ER385 rānei), he hau tautoko argon.
●Ngā Pāhi Whakakī me te Taupoki SAW:Te urunga wera ≤ 1.5 kJ/mm, te pāmahana whakawhiti ≤ 120°C. He rerenga whanariki iti motuhake.
●Whakarewatanga o roto
●Whakamātautau Irirangi 100% + UT(mō ASTM B775)
●Te Whakamahana Otinga:Maimoatanga wera paipa katoa (1050-1150°C), tineia te wai.
●Te Whakapūkara me te Whakakorekore
●Whakamātautau Waipūmau
●PMI me te Tirotiro Ahu
●Te Tohu
Tukanga LSAW mō te Koranu Teitei – Te Diameter Tino Nui (406–1219mm OD, 6.0–40mm WT):
● UOE, JCOE rānei e hangaia ana mai i te pereti 904L
● Te whakarewa taha-rua o te SAW me te mana whakahaere wera tino kaha
● Te whakamahana otinga katoa i muri i te whakarewatanga
Ngā Pūwāhi Mana Whakahaere Matua mō te Whakarewa 904L:
● Te urunga wera: ≤ 1.5 kJ/mm (whāinga ≤ 1.2 kJ/mm)
● Te pāmahana whakawhiti: ≤ 120°
● Hau ārai: 100% Ākona me te kaikohi hāora
● Te whakamahana i te otinga: 1050-1150°C, te tinei wai – me whai mana
● Te whakapūkara: Ranunga waikawa motuhake mō ngā koranu chromium/nickel teitei
7. Ngā Tukanga Whakahaere Kounga me te Whakamātautau mō te Paipa Kowiri tira ASTM B673 UNS N08904
| Atamira | Tikanga Tirotiro | Kaupapa |
| Rauemi Mata | Tātari Matū (OES, ICP rānei) | Manatokona N08904 (Ni 23-28%, Cr 19-23%, Mo 4-5%, Cu 1-2%) |
| Rauemi Mata | Whakamātautau Kume | Hua ≥ 220 MPa, Kukū ≥ 490 MPa |
| Rauemi Mata | Whakamātautau Waikura (ASTM G28) | Ātete waikura ā-pūmua (mō te mahi waikawa) |
| Rauemi Mata | Tātaitanga PREN | Me whakarite kia ≥ 35 te PREN |
| Kei te Tukatuka | Aroturukitanga Whakauru Wera | ≤ 1.5 kJ/mm |
| Kei te Tukatuka | Te pāmahana i waenganui i te ara | ≤ 120°C |
| Whakarewa (ERW) | Iahiko Eddy (100%) | Te pono o te whakarewa |
| Whakarewa (EFW/LSAW) | 100% UT (PAUT rānei) | Kitea ngā hapa whakarewa |
| Whakarewa (EFW/LSAW) | RT (10-100% mō ia whakaritenga) | Kounga whakarewa |
| Whakarewa | Te Whakauru Tae (PT) | Ngā kapiti o te mata |
| Te Whakamahana i Muri i te Otinga | Whakamātautau Pakari | ≤ 90 HRB |
| Te Whakamahana i Muri i te Otinga | Hanganga Moroiti (ASTM E407) | Kāore he sigma, chi, he wāhanga tuarua rānei |
| Paipa Kua Oti | Whakamātautau Waipūmau | Te pono o te pēhanga |
| Paipa Kua Oti | PMI (XRF) | Whakaū te kōeke (Ni, Cr, Mo, Cu) |
| Paipa Kua Oti | Whakamātautau Waikura Poka (ASTM G48) | Manatokohia te ātete ki te poka (mēnā kua tohua) |
| Paipa Kua Oti | Tirohanga me te Tohu | Te Whai Aroturuki |
Ngā Whakamātautau Kōwhiringa mō te Ratonga Tino Hira:
● ASTM G28 Mahi A (waikawa whanariki-waikawa whanariki) mō te waikura ā-roto
● Whakamātautau poka ASTM G48 i roto i te FeCl₃ (6% i te 40°C) mō te ratonga wai moana
● Whakamātautau HIC/SSC mō te ratonga kawa (NACE TM0284, TM0177)
● Whakamātautau konukura whanariki hei whakaiti i te ātete waikawa
8. Ngā Whakamahinga Matua – Paipa Kowiri tira ASTM B673 UNS N08904
●Ngā tipu waikawa whanariki:Te whakahaere i te waikawa kukū (90-98% H₂SO₄) i ngā pāmahana reo, te waikawa waimeha (5-10%) i ngā pāmahana teitei, me ngā paipa whakamatao waikawa. Ka whakakapi i te 316L me te 317L.
●Te whakaputanga waikawa phosphoric (tukanga mākū):Ngā pūwero, ngā whakamatao uira, me ngā raina whakawhiti e whakahaere ana i te waikawa phosphoric me te chloride me te fluoride. Ko te 904L te paerewa mō te waikawa phosphoric tukatuka mākū.
●Ngā paipa putanga mimiti hau korehau (FGD):Kei raro iho i ngā pūwero kei reira ngā hau waikawa maku whai pūhaumāota. Ka whakamahia te 904L mō ngā paipa putanga me ngā arai puranga ina kore e ranea te 317L.
●Ngā pūnaha whakamatao wai moana (pāmahana teitei):Ngā pūnaha wai whakamatao takutai moana ina neke atu te pāmahana o te wai moana i te 40°C. Ka ātete te 904L ki te pakaru i ngā pāmahana ka rahua pea te 316L, tae atu ki te super duplex.
●Ngā kaipuke matū (IMO Momo II):Ngā paipa utanga mō ngā matū kaha tae atu ki te waikawa whanariki, te waikawa phosphoric, me ngā waikawa waro. E whakaaetia ana te 904L e te maha o ngā kamupene kaipuke matū.
●Ratonga kawa ki tāwāhi:Te whakaputanga hinu me te hau me te H₂S tiketike me te pūhaumāota tiketike, ina koa he pāmahana taurite engari he nui ake te hiahia mō te waikura i te takirua.
●Ngā whare hanga mā te penupenu me te pepa:Ratonga hauhā hauota me te hauhā konutai hauota ina kore e ranea te 317L.
●Ngā taputapu rongoā:Ngā tauhohenga me ngā paipa mō ngā tukanga e whakamahi ana i ngā waikawa kaha.
●Ngā taputapu tae kakahu:Ngā mīhini tae e whakahaere ana i ngā kaukau tae kua whakakīia ki te hauwai.
●Te tukatuka kai:Ngā wai tote pūhaumāota nui, te wai pīkara, me ngā hua kai waikawa.
9. Tākai me te Tukunga - Puranga Paipa Rino JIS A5525 SKK490 SSAW
Tākai:
●Te parenga ā-waikura:He pepa kirihou, he pepa VCI rānei. Kāore he toenga hinu mō te mahi matū.
●Ngā taupoki mutunga:Ngā potae kirihou mahi-mātotoru (he tae kei te waehere – he kikorangi te nuinga mō te 904L).
●Te here (Ngā diameter iti):Ka takai takitahitia ia paipa, kātahi ka herea ki ngā whitiki kore-whakarewa.
●Tākai takitahi (Ngā diameters nui):Takai kiriata kirihou me ngā mowhiti pahuka.
●Ngā pouaka rakaumō ngā kaupapa matū nui me ngā kaupapa taiwhenua.
Tukunga:
Ipu mō te ≤ 610mm, pakaru-papatipu mō ngā diameter nui ake.
Ngā tuhinga:MTC 3.1/3.2, pūrongo whakamātautau wai, pūrongo UT/RT, pūrongo PMI, pūrongo whakamātautau waikura (mēnā kua tohua), pūrongo ā-ahu, rārangi tākai, COO. Te whai i te katoa mai i te tau wera ki te paipa kua oti.
10. Ngā Painga me ngā Pātai Auau mō te Rino Womic – Paipa Whakarewa ASTM B673 UNS N08904
He aha ai koe ka mahi tahi ai me Womic Steel mō ngā paipa whakarewa 904L?
● Te whānuitanga o ngā rahi: ERW 1/4″ – 24″, EFW/LSAW 8″ – 48″.
● Te whakamahana i te otinga katoa i muri i te whakarewa (1050-1150°C, te tinei wai).
● Whakamātautau waikura ā-roto (ASTM G28, G48) mō te ratonga waikawa me te wai moana.
● PREN ≥ 35 – tino pai te parenga poka.
● Ngā wā arahi whakataetae: 60-75 ngā rā mō te ERW, 75-90 ngā rā mō te EFW/LSAW.
● Tiwhikete Ao: ISO 9001, PED (CE), EN 10204 Momo 3.2.
Ngā Pātai Auau (FAQ) – ASTM B673 UNS N08904 Paipa Whakarewa
He aha te rerekētanga i waenganui i te 904L me te 316L?
A: He nui ake te nikara o te 904L (23-28% vs 10-14%), he nui ake te chromium (19-23% vs 16-18%), he nui ake te molybdenum (4-5% vs 2-3%), ā, he parahi tāpiri (1-2%). Mā tēnei ka pai ake te ātete o te 904L ki te waikawa whanariki, te waikawa phosphoric, me te pitting i roto i ngā chloride. Ko te PREN he 35-40 vs 24-26 mō te 316L. Ko te utu o te 904L he tata ki te 316L, ā, ka whakamahia ina pakaru te 316L.
P: He pai te 904L mō te ratonga wai moana?
Āe. He tino pai te ātete o te 904L ki te waikura o te waikura me te kapiti i roto i te wai moana tae atu ki te pāmahana tata ki te 50°C. Mō ngā pāmahana teitei ake, mō ngā āhuatanga pūmau rānei, me whakamahi pea i ngā koranu super duplex, nickel rānei. He maha ngā wā ka whakamahia te 904L mō ngā pūnaha whakamatao wai moana ina pakaru te 316L.
P: He aha te pāmahana ratonga mōrahi mō te 904L i roto i te waikawa whanariki?
A: I roto i te 50-70% H₂SO₄, ka taea te whakamahi i te 904L tae atu ki te 100°C. I roto i te 90-96% H₂SO₄, whakawhāitihia ki te 50-60°C. Mō ngā pāmahana teitei ake, mō te waikawa kukū ake rānei, me whakamahi ngā koranu nikara teitei (Koranu 20, Koranu 625, Koranu C-276). Tirohia tonu ngā tūtohi waikura mō ngā āhuatanga motuhake.
Q: Me whakamahana te 904L i muri i te whakarewa?
A: Ae, e ai ki te ASTM B673. Ka taea e te 904L te hanga i ngā wāhanga tuarua (sigma, chi) i roto i te HAZ whakarewa mēnā he puhoi te whakamatao. Mā te whakamahana otinga i te 1050-1150°C me te tinei wai ka whakarewa i ēnei wāhanga, ā, ka whakahokia mai te ātete ki te waikura. Ka whakahaerehia e Womic te whakamahana otinga katoa i runga i ngā paipa whakarewa 904L katoa. Mō te whakarewa mara, whakamahia te whakaurunga wera iti, ā, whakaarohia te whakamahana otinga i muri i te whakarewa mēnā ka taea.
Q: Ko tēhea whakarewa whakakī e taunakitia ana mō te 904L?
A: Ko te AWS A5.14 ERNiCrMo-3 (Inconel 625) me te ER385 rānei te mea e taunakitia ana. E whakamahia whānuitia ana te ERNiCrMo-3, ā, he pai te ātete ki te waikura e rite ana ki te 904L. He whakakī taurite motuhake te ER385 mō te 904L. E whakamahi ana a Womic i te ERNiCrMo-3 mō ngā tukanga EFW.
P: He pai te 904L mō te ratonga kawa (H₂S)?
Āe, e tika ana te 904L kia rite ki te NACE MR0175/ISO 15156 mō te mahi kawa me ngā pēhanga ā-wāhanga H₂S tae atu ki te 1 pae (15 psi) i roto i ngā awhe pakeke motuhake. He maha ngā wā ka whakamahia i roto i ngā mara kawa-āhua kāore e ranea ngā papa rua nā te nui o ngā pūhaumāota.
Q: He aha te wā ārahi noa mō te paipa whakarewa 904L?
A: 60-75 ngā rā mō te ERW (ngā diameter iti ki te waenga), 75-90 ngā rā mō te EFW/LSAW (ngā diameter nui). He roa ake ngā wā arahi i ngā maitai kore waikura paerewa nā te mea he mea motuhake te tiki i ngā rīpene/pereti koranu (he maha ngā wā 12-16 wiki mai i te mira). E 7-14 ngā rā e tāpirihia ana e te tirotiro tuatoru.
P: Ka taea te whakamahi i te 904L mō ngā pūnaha wai parakore teitei?
Āe, engari he nui rawa te whakaritenga. Mō te wai parakore (RO, DI, WFI), he rawaka te 316L, ā, he iti ake te utu. Ko te 904L e rahuitia ana mō ngā āhuatanga matū kaha, ngā āhuatanga hauota nui rānei.
Tohutoro Kaupapa – Whakakapinga Paipa Whakamatao Waikawa Whāriki o te Whare Hanga Waikawa o Ūropi
Whenua:Tiamana (Rhine-Westphalia ki te Raki, matatini matū)
Paerewa me te Taumata:ASTM B673 UNS N08904 (904L) – paipa whakarewa
Ngā Ahu me te Rahinga:
● OD 88.9mm (3″) × Rārangi 10S (3.05mm WT) – 600 mita (tata ki te 5 tāne) – Tukanga ERW
● OD 114.3mm (4″) × Rārangi 10S (3.05mm WT) – 500 mita (tata ki te 6 tāne) – Tukanga ERW
● OD 168.3mm (6″) × Rārangi 10S (3.40mm WT) – 300 mita (tata ki te 4 tana) – Tukanga EFW
● OD 219.1mm (8″) × Rārangi 10S (3.76mm WT) – 200 mita (tata ki te 4 tana) – Tukanga EFW
Tapeke:1,600 mita, tata ki te 19 tāne
Ngā Whakatakotoranga:ASTM B673 UNS N08904 otinga kua whakamahanahia, kua whakamākūkūhia, ngā pito kua whakapikohia. Whakamātautau waipū i te 1.5× pēhanga hoahoa (hoahoa 1.2 MPa). 100% UT mō ngā paipa EFW, ia au hurihuri mō te ERW. PMI i runga i ia paipa. Whakamātautau waikura whakahau kia rite ki te ASTM G28 Mahi A (waikawa ferric sulfate-sulfuric) – tere waikura < 5 mpy (kua tutuki 2-3 mpy). Whakamātautau waikura poka kia rite ki te ASTM G48 Tikanga A (6% FeCl₃, 24h i te 40°C) – kāore he poka. Whakamātautau waikura ā-ira kia rite ki te ASTM A262 Mahi E (paahi). Tirotiro tuatoru e TÜV Tiamana.
Taupānga:Te whakakapinga o ngā paipa whakamatao waikawa me ngā raina whakawhiti e pā ana ki roto i te tipu whakaora waikawa whanariki. Ka whakahaerea e ngā paipa te waikawa whanariki wera (85-93% H₂SO₄) i te 70-90°C mai i te pourewa mimiti ki te whakamatao waikawa. I rahua ngā paipa 316L o mua i muri i ngā marama 18 nā te waikura whānui me te pakaru. I tīpakohia te 904L nā tōna ātete pai ki te waikawa whanariki kukū i ngā pāmahana teitei.
Ngā Wero Hangarau me ngā Otinga:
●Te waikura i roto i te waikawa whanariki wera kukū (85-93%, 70-90°C)– Ka waikura te 316L i ngā tere > 50 mpy i raro i ēnei āhuatanga. Ko te 904L me ōna nikara, chromium, molybdenum, me te parahi teitei e whakarato ana i te tere waikura < 5 mpy. I whakahaerehia e Womic he whakamātautau ASTM G28 Practice A ki ngā tauira whakarewa turanga me ngā tauira whakarewa. Ngā tere waikura: whakarewa turanga 2.1 mpy, whakarewa 2.8 mpy – kei raro iho i te rohe 5 mpy. Kua whakaaetia e te kiritaki.
●Ātete ki te waikura whakarewa– Ko te whakarewa te wāhi tino ngoikore. I whakamahia e Womic te whakaurunga wera iti (≤ 1.2 kJ/mm) me te whakakī ERNiCrMo-3. I paahitia e ngā tauira whakarewa te whakamātautau G28 me te tere waikura 2.8-3.2 mpy. Kāore i whakaatuhia e te hanganga moroiti he maturuturunga wāhanga tuarua.
●Te ātete ki te poka i te pāmahana teitei– Kei roto i te waikawa he iti noa ngā pūhaumāota (mai i te puna wai). Mā te PREN 35-40 a 904L ka ātete ki te pakaru. I whakahaerehia e Womic te whakamātautau pakaru G48 i te 40°C (he kino ake i te pāmahana ratonga 70°C? He iti ake te pāmahana whakamātautau 40°C, engari he kaha te FeCl₃). Hua: kāore he pakaru i muri i te 72 hāora.
●Te waikura ā-pūmua i muri i te whakarewatanga– He iti te waro o te 904L (≤ 0.020%), engari me whakamahana tonu te wai. I whakahaerehia e Womic te whakamahana katoa i te wai i te 1100°C, me te tinei wai. I paahitia te whakamātautau ASTM A262 Practice E.
●Te tukanga whakarewa mara– I hiahiatia e te tīma tiaki tipu he WPS whai tohu mō ngā whakatikatika. I whakaratohia e Womic he 15 tīkitipati whakarewa me te WPS e whakamahi ana i te GTAW, te whakakī ERNiCrMo-3, te whakamahana 10-20°C, te whakawhiti ≤ 120°C, te whakauru wera ≤ 1.2 kJ/mm. I paahitia e ngā tīkitipati ngā whakamātautau RT, PT, me te G28.
●Te whakahaere ratonga ki te whare matū Tiamana– I tukuna ngā paipa mai i Shanghai ki te tauranga o Hamburg, kātahi ka haria ki te taraka ki te wāhi. I tirotirohia ngā paipa e TÜV Tiamana i Hamburg. I tukuna katoatia ngā 19 tana i roto i ngā wiki 10. I tukuna mā te hiko te kete tuhinga (MTC 3.2, ngā pūrongo whakamātautau).
Hua:I tāutahia ngā paipa 904L hou i te wā o te huringa hauwhā tuatoru o te tau 2024. I muri i ngā marama 12 o te whakahaere, kāore i kitea he waikura e taea te ine, kāore he poka, kāore hoki he turuturu. E tumanakohia ana e te kiritaki he 15+ tau te roa o te ora ratonga (ki te whakataurite ki te 1.5 tau mō te 316L). Ko Womic Steel he kaiwhakarato whai mana inaianei mō ngā paipa ratonga waikawa whanariki o tēnei tipu matū.
Whakapā mai:
Paetukutuku: www.womicsteel.com
Ī-mēra: sales@womicsteel.com
Waea / WhatsApp / WeChat:
Wikitōria: +86 15575100681
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Womic Steel – Tō hoa pono mō ngā paipa kowiri tira ASTM B673 UNS N08904 kua whakarewaina mō ngā tipu waikawa whanariki me te waikawa phosphoric, ngā pūnaha FGD, te whakamatao wai moana, me te ratonga matū kaha puta noa i te ao.
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