ASTM B673 UNS N08904 (904L) Welded Stainless Steel Pipe: Kugona Kugadzira & Magadzirirwo Echigadzirwa

Tsananguro pfupi:

Womic Steel inopa ASTM B673 UNS N08904 (904L) welded stainless steel pombi yeASTM B673 UNS N08904 (904L) yenzvimbo dzine ngura dzakanyanya kukuvadza dzinosanganisira sulfuric acid, phosphoric acid, uye mvura yegungwa ine chloride yakawanda. 904L isimbi isina ngura yakanyanya austenitic ine nickel yakawanda (23-28%), chromium yakawanda (19-23%), uye molybdenum (4-5%), pamwe nemhangura (1-2%) yekudzivirira zvakanyanya kuderedza acids. Simba shoma remukoho 220 MPa (31,900 psi), simba rekudhonza 490 MPa (71,100 psi). Chiumbwa ichi chinopa simba rekudzivirira makomba (PREN) re35-40, rakakwira zvakanyanya kupfuura 316L, uye rinodzivirira zvakanyanya ngura. Kugadzira kunosanganisira ERW yemadhayamita madiki uye EFW yemadhayamita makuru, ese ari maviri ane kupinda kwakazara uye post-weld solution annealing. Dhayamita yekunze kubva pa6.35mm kusvika 1219mm (1/4″ – 48″), ukobvu hwemadziro 0.5mm – 40mm, kureba kwakajairwa kusvika 12m, kugadzirwa kwakagadzirwa kusvika 18m. Chitupa chemugayo, hydrotest, 100% UT, solution annealed uye pickled finish, beveled kana plain ends dziripo. Dzakakodzera sulfuric acid plants, phosphoric acid production, flue gas desulfurization (FGD), sea water cooling systems (highvated tembiricha), chemical tankers, offshore platforms (sour service), uye mishonga.

Saizi yeSimbi Isina Kugayiwa Yesimbi Yakasungirirwa:Dhayamita yekunze: 6.35mm – 1,219mm (1/4″ – 48″), Ukobvu hwemadziro: 0.5mm – 40mm (Ronga 5S, 10S, 40S), Kureba: 6m – 12m yakajairika, urefu hwakatarwa hunosvika 18m

Standard & Giredhi reWelded Stainless Steel Pipe:ASTM B673 (pombi yakasungirirwa) / ASTM B674 (isina musono) / ASTM B677 (pombi isina musono); UNS N08904; EN 10217-7 1.4539; Yakaenzana ne904L

Kushandiswa kweWelded Stainless Steel Pipe:Zvivakwa zveSulfuric acid (zvinogadzirwa neacid yakawanda uye inonyungudutsa, zvinotonhodza acid), kugadzirwa kwephosphoric acid (zvinoshandiswa kunyorova, mitsetse yekufambisa), maducts ekudonhedza gasi reflue gas (FGD) uye mastack liners, masisitimu ekutonhodza mvura yegungwa ane tembiricha yakakwira (30-50°C), matangi emakemikari nemapombi ekutakura zvinhu (makemikari ane hukasha), mafuta negasi rekunze kwenyika (zvinogadzirwa neH₂S yakawanda uye machloride), zvirimwa zvebleach zvepulp nepepa (nzvimbo dzine chloride yakawanda), michina yemishonga, michina yekudhaya machira, kugadzira chikafu (mabrines ane chloride yakawanda), zvinochinja-chinja kupisa kwemvura inotonhodza zvine hukasha

Simbi yeWomic inopa mitengo yepamusoro uye inokwikwidzana yeASTM B673 UNS N08904 welded stainless steel pombi, 904L super austenitic pombi, ERW stainless pombi, EFW stainless pombi, acid residential pombi, seawater pombi. Chitupa chemugayo EN 10204 3.1/3.2, hydro test, UT, solution annealed, beveled/plain ends, pickled finish inowanikwa. Kuwanikwa kwemufekitori zvakananga kumapurojekiti emakemikari, egungwa, uye ekunze kwenyika pasi rese.

Tumira email kwatiri Zvimiro zveChigadzirwa

Ruzivo rweChigadzirwa

Matagi eChigadzirwa

1. Simbi yeWomic: Kugona Kugadzira & Simba reKambani

Womic Steel Group ikambani inogadzira zvinhu zvikuru uye inotumira kunze kwenyika pasi rose ine ruzivo rwemakore anopfuura makumi maviri mukugadzira mapaipi esimbi anodzivirira ngura. Nzvimbo yedu yekugadzira mapaipi esimbi e904L inoshandisa matekinoroji akasiyana-siyana epamusoro ekushongedza nekutonga kwakasimba kwekupisa uye kurapwa kwekupisa mushure mekushongedza:

● Mutsetse weERW (wekushongedza magetsi):Kune dhayamita kubva pa6.35mm kusvika 610mm (1/4″ – 24″), ukobvu hwemadziro kubva pa0.5mm kusvika 12.7mm. Kushongedza kwemhepo kwakanyanya nekupisa kushoma (≤ 1.2 kJ/mm) kudzivirira kupatsanurwa kwehuwandu hwakawanda hwe alloy. Yakanakira mapaipi madiki kusvika pakati nepakati e904L.

●Mutsetse weEFW (Electric Fusion Welding):Kune dhayamita kubva pa219mm kusvika 1219mm (8″ – 48″), ukobvu hwemadziro kubva pa4.0mm kusvika pa40mm. TIG (GTAW) root pass ine SAW fill pass, uchishandisa filler metal yakafanana (ERNiCrMo-3 kana ER385).

●Mutsetse weLSAW / SAWL weHigh Alloy:Kune dhayamita kubva pa406mm kusvika 1219mm (16″ – 48″), ukobvu hwemadziro hunosvika 40mm. Kubatanidza arc plates dzakamonerwa dze904L nekupisa kunodzorwa.

Mapaipi ese e904L akasungirirwa anogadziriswa ne solution annealing (kupisa) pa 1050-1150°C zvichiteverwa nekudzima mvura kuti inyungudise chero zvikamu zvechipiri uye kudzoreredza kuramba kwengura, zvichiteverwa nekunyungudika uye kupfapfaidzwa ne acid mixtures.

Zvitupa zveHunhu & Kutevedzera Mutemo:

●Chitupa cheISO 9001:2015

●PED 2014/68/EU (CE Marking) yemidziyo yekumanikidza

●EN 10204 3.2 Chitupa chine kusimbiswa kwebato rechitatu (TÜV, BV, SGS, LR)

●Kuongorora kweVatatu (TPI) kwakatenderwa neSGS, BV, ABS, DNV, TÜV

●NACE MR0175 / ISO 15156 yebasa rakaoma (H₂S) kana zvakumbirwa

●Kodhi yeASME Boiler nePressure Vessel (Chikamu VIII, Chikamu 1) kana zvakumbirwa

Womic Steel inopa mapaipi e904L akasungirirwa kunyika dzinopfuura makumi matatu mumaindasitiri emakemikari, emugungwa, uye ekunze kwenyika.

Kuchinjika Kwekugadzira:

●ERW: 6.35–610mm OD × 0.5–12.7mm Uzito × ≤ 12m

●EFW: 219–1219mm OD × 4.0–40mm WIT × ≤ 12m (yakareba kana yakumbirwa)

●LSAW: 406–1219mm OD × 6.0–40mm Uzito × ≤ 18m

●Sarudzo dzekupedzisa: Yakanamirwa uye yakakangwa, yakanyoroveswa yakajeka (yemachubhu madiki)

2. ASTM B673 UNS N08904: Kuumbwa kwezvinhu uye Hunhu hwekushanda

UNS N08904 (904L) isimbi isina tsvina inogadzirwa nesimbi ine nickel yakawanda (23-28%), chromium yakawanda (19-23%), molybdenum (4-5%), uye mhangura (1-2%). Kuwedzerwa kwemhangura uku kunopa simba guru rekudzivirira maasidhi anoderedza akadai sesulfuric nephosphoric acid. Molybdenum yakawanda nechromium zvinopa simba rakanaka rekudzivirira makomba munzvimbo dzine chloride. 904L inowanzo shandiswa senzira inodhura zvishoma pane nickel alloys mumamiriro ekunze ane simba.

Kuumbwa kweMakemikoro (Kuongororwa kweChirongo, % nehuremu):

Chinhu	UNS N08904 (904L)	316L (yekuenzanisa)
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	Kuenzana	Kuenzana

Zvimiro zveMichina (Kupisa Kwemukamuri, Mhinduro Yakanyungudutswa):

Pfuma	UNS N08904 (904L)
Simba reGoho (min, 0.2% offset)	220 MPa (31,900 psi)
Simba reKusimba (miniti)	490 MPa (71,100 psi)
Kureba (min, 50mm geji)	35%
Kuoma (kwakanyanya)	90 HRB

Zvimiro zvemuviri:

Kuwanda: 8.00 g/cm³

Modulus yeElasticity: 195 GPa (28.3 × 10⁶ psi)

Kufambisa kwekupisa: 12.0 W/m·K pa100°

Kuwedzerwa kweThermal Coefficient: 15.4 × 10⁻⁶/°C (20-100°C)Kuramba Kuora:

Pitting Resistance Equivalent Number (PREN) = Cr% + 3.3(Mo%) + 16(N%) ≈ 35-40 (vs 316L PREN 24-26)

Kudzivirira zvakanyanya sulfuric acid munzvimbo dzakasiyana-siyana (kusvika 90% pakupisa kuri pakati nepakati)

Kuramba kwakanyanya ku phosphoric acid (maitiro emvura) ane ma chloride ne fluorides

Kuramba kwakanaka kwazvo kubva pakuora kwegomba uye kucheka munzvimbo dzine chloride

Kuramba kwakanaka kubva mukuora kwepakati pegranular mushure mekushongedza (kabhoni shoma)

Yakakodzera kushandiswa sevhisi ine sour (NACE MR0175) kana ichipiswa zvakanaka

Miganhu Yekuora (Inenge):

● Sulfuric acid (H₂SO₄): kusvika 90% pa50°C; kusvika 70% pa100°C

● Hydrochloric acid (HCl): inongogumira pakunyungudutsa (< 5%) patembiricha yemumba

● Phosphoric acid (H₃PO₄): yakanaka kwazvo kusvika 85% pa100°C

● Acetic acid: yakanaka kwazvo pahuwandu hwese

● Mvura yegungwa: yakanaka kwazvo pakupisa kusvika ku50°C

3. Kutevedzera Dimensional Range & Standards

Chinhu	Tsanangudzo
Zvakajairika	ASTM B673 / ASME SB-673 (pombi yakasungirirwa)
Maitiro Ekugadzira	ERW, EFW, LSAW
Dhayamita Yekunze	ERW: 6.35 - 610mm; EFW/LSAW: 219 - 1219mm
Ruvara rweMadziro	ERW: 0.5 - 12.7mm; EFW/LSAW: 4.0 – 40mm
Range yeRonga	5S, 10S, 40S (yeNPS 1/8″ – 48″)
Hurefu hwehurefu	Yakajairwa: 6m; Yakatambanudzwa: 12m, 18m, kusvika 18m
Kupedzisa Kupedzisa	Mugumo Wakajeka (PE), Mugumo Wakatsemurwa (BE)
Kupedzisa Kwepamusoro	Yakanamirwa & Yakabikwa, Yakanamirwa Yakajeka
Kushivirira	OD: ±0.5% kana ±3.2mm; Huremu: ±12.5% (pa ASTM B775); Kureba: +50mm / -0mm

4. Zviyero & Magadzirirwo Anowanikwa - ASTM B673 UNS N08904 Welded Stainless Steel Pipe (Saizi Dzakajairwa Dzakasarudzwa)

NPS	OD (mm)	Purogiramu	Huremu (mm)	Kurema (kg/m2)	Kureba Kwakajairwa	Kushandiswa Kwakajairika
1/2″	21.3	10S	2.11	1.00	6m	Kuyerwa kwemakemikari
3/4″	26.7	10S	2.11	1.28	6m	Mutsetse wezviridzwa
1″	33.4	10S	2.77	2.09	6m	chikafu cheasidhi
1-1/2″	48.3	10S	2.77	3.11	6m	Mutsetse weasidhi yesulfuric
2″	60.3	10S	2.77	3.93	6m / 12m	Mutsetse wekuita
3″	88.9	10S	3.05	6.46	6m / 12m	Kutamisirwa kweasidhi
4″	114.3	10S	3.05	8.37	6m / 12m	Asidhi yePhosphoric
6″	168.3	10S	3.40	13.8	6m / 12m	Kutonhodza kwemvura yegungwa
8″	219.1	10S	3.76	20.0	12m	Mutsetse wekunze kwegungwa
10″	273.0	10S	4.19	27.8	12m	Nzira yekubuda nayo muFGD
12″	323.9	10S	4.57	36.0	12m	Kemikari huru
16″	406.4	10S	4.78	47.4	12m	Dhayamita hombe

*Zviyero zvakagadzirwa kunze kwemhando idzi zviripo. Mapaipi e904L akasungirirwa anoda nguva yakareba yekupinza (mazuva mashoma makumi matanhatu) nekuda kwekushandiswa kwakakosha kwestrip/plate.*

5. Common Super Austenitic Standards & Grades Yakagadzirwa neWomic Steel

Zvakajairika	Magiredhi eSimbi / Alloy	Kushandiswa Kwakajairika	Maitiro ekushongedza
ASTM B673	UNS N08904 (904L)	Sulfuric/phosphoric acid, mvura yegungwa	EFW/LSAW/ERW
ASTM B674	UNS N08904 (isina musono)	Machubhu ekumanikidza	-
ASTM B677	UNS N08904	Pombi isina musono	-
EN 10217-7	1.4539 (904L)	Zvinangwa zvekumanikidza, super austenitic	SAW/ERW
ASTM A312	UNS N08367 (AL-6XN), S31254 (254 SMO)	Mvura yegungwa, FGD	EFW/LSAW

Mashandisirwo:Zvivako zveSulfuric acid, kugadzirwa kwephosphoric acid, masisitimu eFGD, kutonhora kwemvura yegungwa (tembiricha yakakwira), matangi emakemikari, sevhisi yemvura inonaka yekunze kwenyika.

6. Maitiro Ekugadzira - Pombi Yesimbi Isina Kugayiwa Yakasungirirwa (ERW, EFW, LSAW)

Kubatanidza 904L kunoda kungwarira kudzora kupisa uye kurapwa kwekupisa mushure mekusanganisa simbi nekuda kwehuwandu hwakawanda hwesimbi. Mhangura nemolybdenum zvinoita kuti simbi ikwanise kupatsanurwa kana kutonhora kuchinonoka.

Maitiro eERW (Electric Resistance Welding) - Diki kusvika Pakati nepakati pedhayamita (6.35–610mm OD):

●Kuongorora Zvinhu Zvisina Kugadzirwa (Strip/Coil):Chidimbu che904L chakasimbiswa kuti chakagadzirwa sei (Ni 23-28%, Cr 19-23%, Mo 4-5%, Cu 1-2%). Coil yega yega ine nhamba yekupisa yakasiyana.

●Kusunungura & Kuenzanisa

●Kucheka Mipendero Yezvidimbu

●Kugadzira:Kuumbwa kwemupumburu nguva dzose.

●Kukwesha Kwemagetsi Kwakawanda:Kupisa kushoma (≤ 1.2 kJ/mm) kudzivirira kuparadzaniswa kweCu/Mo. Kusundira mumhepo isina kusimba.

●Kubatanidza Musono:Kupinza kweinduction kunoteverwa nekudzima mvura.

●Kukura & Kururamisa

●Kucheka kusvika pakureba

●NDT:Kuongororwa kweEddy current (100%) + UT yekusarudza.

●Kunyungudutsa kwemhinduro (Paipi Yakazara):1050-1150°C, chidzimiso chemvura. Zvinodiwa pakunyungudutsa zvikamu zvechipiri.

●Kuedzwa kweHydrostatic

●Kusvina & Kunzwa Kunyara(asidhi yakasanganiswa yakakosha yearuni yakawanda)

●Kutarisa PMI (XRF) & Kuomarara

●Kuongorora Kwekupedzisira & Kumaka

Maitiro eEFW (Electric Fusion Welding) - Dhayamita Yakakura (219–1219mm OD, 4.0–40mm WT):

●Kugadzirira Ndiro:Ndiro ye904L, mipendero yakakomberedzwa (X bevel).

●Kugadzira Roll

●Kukwevera Tack

●TIG (GTAW) Root Pass:Chinozadza chinoenderana (ERNiCrMo-3 kana ER385), gasi rinotsigira argon.

●Mapasi eSAW Fill & Cap:Kupisa kwekuisa ≤ 1.5 kJ/mm, tembiricha yepakati pemvura ≤ 120°C. Kuyerera kwakakosha kwesarufa shoma.

●Welding yemukati

●Kuongororwa kweX-ray 100% + UT(pamwe chete neASTM B775)

●Kugadziriswa kweMhinduro:Kurapa kupisa kwepombi zvizere (1050-1150°C), chidzimiso chemvura.

●Kusvina & Kunzwa Kunyara

●Kuedzwa kweHydrostatic

●Kuongorora kwePMI & Dimensional

●Kumaka

Maitiro eLSAW eAlloy Yakakwirira - Dhayamita Yakakura Kwazvo (406–1219mm OD, 6.0–40mm WIT):

● UOE kana JCOE inoumbwa kubva muplate ye904L

● Kushongedza kweSAW kwemativi maviri nekutonga kwakasimba kwekupisa

● Kugadzirisa zvizere mushure mekunamira

Zvinhu Zvakakosha Zvekudzora Kushandiswa Kwekushongedza 904L:

● Kupinza kupisa: ≤ 1.5 kJ/mm (chinangwa ≤ 1.2 kJ/mm)

● Kupisa kwepakati pemapasi: ≤ 120°

● Gasi rekudzivirira: 100% Argon ine oxygen getter

● Kunyungudutsa kwemvura: 1050-1150°C, mvura inodzima - zvinodikanwa

● Kusanganisa: Musanganiswa weasidhi yakakosha ye chromium/nickel alloys yakawanda

7. Maitiro Ekuongorora Hunhu uye Kuedza Mapaipi eASTM B673 UNS N08904 Welded Stainless Steel

Danho	Nzira yekuongorora	Chinangwa
Zvinhu Zvisina Kugadzirwa	Kuongorora Makemikari (OES kana ICP)	Simbisa N08904 (Ni 23-28%, Cr 19-23%, Mo 4-5%, Cu 1-2%)
Zvinhu Zvisina Kugadzirwa	Kuedzwa kweTensile	Goho ≥ 220 MPa, Kusimba ≥ 490 MPa
Zvinhu Zvisina Kugadzirwa	Kuedzwa kweKuora (ASTM G28)	Kudzivirira ngura pakati pegranular (yekushandira acid)
Zvinhu Zvisina Kugadzirwa	Kuverenga kwePREN	Iva nechokwadi chekuti PREN ≥ 35
Zviri Mukati	Kutarisa Kupinda Kwekupisa	≤ 1.5 kJ/mm
Zviri Mukati	Kupisa kwepakati pemapasi	≤ 120°C
Kusundira (ERW)	Eddy Current (100%)	Kuvimbika kweWeld
Weld (EFW/LSAW)	100% UT (kana PAUT)	Tarisa zvikanganiso zve weld
Weld (EFW/LSAW)	RT (10-100% pachiyero chimwe nechimwe)	Hunhu hwekunamira
Welding	Kudhaya Kunopinda Mukati (PT)	Matsemuka epamusoro
Mushure meKugadziriswa kweMhinduro	Kuedza Kuoma	≤ 90 HRB
Mushure meKugadziriswa kweMhinduro	Magadzirirwo eMicrostructure (ASTM E407)	Hapana sigma, chi, kana zvikamu zvechipiri
Pombi Yapera	Kuedzwa kweHydrostatic	Kutendeseka kwekumanikidzwa
Pombi Yapera	PMI (XRF)	Simbisa giredhi (Ni, Cr, Mo, Cu)
Pombi Yapera	Kuedzwa kweKuora kwePitting (ASTM G48)	Simbisa kuramba kwegomba (kana zvataurwa)
Pombi Yapera	Kuonekwa & Kumaka	Kutevedzana

Miedzo yeSarudzo yeBasa Rakakosha:

● ASTM G28 Practice A (ferric sulfate-sulfuric acid) yekubvisa ngura pakati pegranular

● Kuyedzwa kweASTM G48 pit muFeCl₃ (6% pa40°C) kwekushandiswa kwemvura yegungwa

● Kuongororwa kweHIC/SSC kwekushandiswa kwemushonga usina simba (NACE TM0284, TM0177)

● Kuedzwa kweCopper sulfate kuderedza kuramba acid

8. Mashandisirwo Ekutanga - ASTM B673 UNS N08904 Welded Stainless Steel Pipe

●Zvirimwa zveSulfuric acid:Kubata acid yakawanda (90-98% H₂SO₄) patembiricha iri pakati nepakati, kuderedza acid (5-10%) patembiricha yakakwira, uye kushandisa pombi dzinotonhorera dzine acid. Inotsiva 316L ne317L.

●Kugadzirwa kwePhosphoric acid (maitiro ekunyorova):Zvinobvisa mvura, zvinotonhodza zvinhu, uye mitsetse yekufambisa inotakura phosphoric acid ine machloride nefluoride. 904L ndiyo yakajairika ye phosphoric acid inonyorova.

●Mapaipi ekubuditsa mweya weFlue gas desulfurization (FGD):Pasi pemvura inonyudza mvura ine magasi ane acidic akawanda ane chloride yakawanda. 904L inoshandiswa pakubvisa mvura uye kuisa zvinhu zvinosunga mvura apo 317L haikwani.

●Masisitimu ekutonhodza mvura yegungwa (tembiricha yakakwira):Masisitimu emvura inotonhorera yegungwa uko tembiricha yemvura yegungwa inodarika 40°C. 904L inodzivirira kudonha kwemvura patembiricha apo 316L uye kunyange super duplex zvingatadza kushanda.

●Matangi emakemikari (IMO Type II):Kuisa mapombi ekutakura zvinhu zvemakemikari anopisa anosanganisira sulfuric acid, phosphoric acid, uye organic acids. 904L inotenderwa nemakambani mazhinji ekutakura zvinhu zvemakemikari.

●Basa rekutengesa zvinhu zvisina kunaka kunze kwenyika:Kugadzirwa kwemafuta negasi neH₂S yakakwira uye machloride akakwira, kunyanya kana tembiricha iri pakati nepakati asi kuda kwengura kuchidarika duplex.

●Miti yekuchenesa pulp nepepa:Chlorine dioxide uye sodium hypochlorite sevhisi uko 317L isingakwani.

●Midziyo yemishonga:Zvinoita kuti zvinhu zviite sema "reactors" uye mapaipi ekushandisa ma "strong acids".

●Midziyo yekudhaya machira:Michina yekudhaya inobata madhayi ane chlorine.

●Kugadziriswa kwechikafu:Mvura ine chloride yakawanda, doro remumapickle, uye zvigadzirwa zvekudya zvine acidic.

9. Kurongedza & Kutumira - JIS A5525 SKK490 SSAW Steel Pipe Pile

Kurongedza:

●Dziviriro yekudzivirira ngura:Kuputira nepurasitiki kana bepa reVCI. Hapana mafuta akasara ekushandisa makemikari.

●Zvivharo zvekupedzisira:Zvivharo zvepurasitiki zvinorema (zvine mavara - zvinowanzoita bhuruu ye904L).

●Kubatanidza (Madhayamita madiki):Pombi imwe neimwe inoputirwa yoga yoga, yozobatanidzwa netambo dzisiri dzesimbi.

●Kurongedza kwega kwega (Madhayamita makuru):Purasitiki firimu rakaputirwa nemhete dzefuro.

●Mabhokisi emapurangayemapurojekiti akakosha emakemikari uye ekunze kwenyika.

Kutumira:

Matangi e ≤ 610mm, akapatsanurwa kuti akwanise dhayamita yakakura.

Magwaro:MTC 3.1/3.2, mushumo wekuyedza mvura, mishumo yeUT/RT, mushumo wePMI, mushumo wekuyedza ngura (kana zvataurwa), mushumo wehukuru, runyorwa rwekurongedza, COO. Kutevedza kwakazara kubva panhamba yekupisa kusvika papombi yakapedzwa.

10. Mabhenefiti eSimbi yeWomic & Mibvunzo Inowanzo bvunzwa - ASTM B673 UNS N08904 Welded Pipe

Sei Uchifanira Kushanda Nesimbi yeWomic Steel Paipi Ye904L Welded?

● Hukuru Hwakazara: ERW 1/4″ – 24″, EFW/LSAW 8″ – 48″.

● Kunyungudutsa mvura yese mushure mekunamira (1050-1150°C, kudzima mvura).

● Kuongororwa kwengura mukati meimba (ASTM G28, G48) kuti ione kana paine acid nemvura yegungwa.

● PREN ≥ 35 - yakanakisa pitting kuramba.

● Nguva dzekutungamira dzinokwikwidzana: mazuva 60-75 eERW, mazuva 75-90 eEFW/LSAW.

● Global Certification: ISO 9001, PED (CE), EN 10204 Rudzi 3.2.

Mibvunzo Inowanzo bvunzwa (Mibvunzo Inowanzo bvunzwa) - ASTM B673 UNS N08904 Welded Pipe

Mubvunzo: Musiyano uripo pakati pe904L ne316L ndeupi?
A: 904L ine nickel yakakwira zvakanyanya (23-28% vs 10-14%), chromium yakakwira (19-23% vs 16-18%), molybdenum yakakwira (4-5% vs 2-3%), uye mhangura yakawedzerwa (1-2%). Izvi zvinoita kuti 904L irambe iri nani ku sulfuric acid, phosphoric acid, uye ma chloride. PREN i35-40 vs 24-26 ye316L. 904L inodhura kanenge katatu-kana kupfuura 316L uye inoshandiswa apo 316L inokundikana.

Mubvunzo: Ko 904L yakakodzera kushandiswa mumvura yegungwa here?
A: Ehe. 904L inodzivirira zvikuru ngura inoputika uye inotsemuka mumvura yegungwa kusvika patembiricha inosvika 50°C. Kana tembiricha yakakwira kana mamiriro ekunze asina kumira zvakanaka, super duplex kana nickel alloys dzinogona kudiwa. 904L inowanzoshandiswa kumasystem ekutonhodza mvura yegungwa uko 316L yakakundikana.

Mubvunzo: Ndeipi tembiricha yepamusoro yebasa ye904L mu sulfuric acid?
A: Mu 50-70% H₂SO₄, 904L inogona kushandiswa kusvika 100°C. Mu 90-96% H₂SO₄, muganhu unosvika 50-60°C. Kana tembiricha yakakwira kana acid yakawanda, ma alloys ane nickel yakawanda (Alloy 20, Alloy 625, Alloy C-276) anodiwa. Nguva dzose tarisa machati e corrosion kuti uwane mamiriro chaiwo.

Mubvunzo: Ko 904L inoda kugadziriswa kwemvura mushure mekunamira here?
A: Ehe, zvichienderana neASTM B673. 904L inogona kugadzira zvikamu zvechipiri (sigma, chi) mu weld HAZ kana kutonhora kuchinonoka. Kunyungudutsa kwemvura pa1050-1150°C kunoteverwa ne water quench kunonyungudutsa zvikamu izvi uye kunodzoreredza kuramba kwengura. Womic inoita annealing yakazara yemhinduro pamapombi ese e904L akanyungudutswa. Pakunyungudutsa kwemunda, shandisa input yekupisa kushoma uye funga nezve annealing yemvura mushure mekunyungudutswa kana zvichibvira.

Mubvunzo: Ndeipi simbi yekuzadza welding inokurudzirwa pa904L?
A: AWS A5.14 ERNiCrMo-3 (Inconel 625) kana ER385 inokurudzirwa. ERNiCrMo-3 inowanzoshandiswa uye inopa 904L inodzivirira ngura zvakanaka. ER385 imhando yekuzadza 904L. Womic inoshandisa ERNiCrMo-3 pakuita EFW.

Mubvunzo: Ko 904L yakakodzera kushandiswa sevhisi yesour (H₂S) here?
A: Ehe, 904L inokodzera zvichienderana neNACE MR0175/ISO 15156 pakushandiswa kwesour neH₂S partial pressures kusvika ku1 bar (15 psi) munzvimbo dzakatarwa dzekuoma. Inowanzo shandiswa muminda ine sour iri pakati nepakati uko duplex isingakwani nekuda kwechloride yakawanda.

Q: Ndeipi nguva yakajairika yekutungamira kwepombi yakasungirirwa ye904L?
A: Mazuva 60-75 eERW (dhayamita diki kusvika pakati nepakati), mazuva 75-90 eEFW/LSAW (dhayamita hombe). Nguva dzelead dzakareba kupfuura dzesimbi dzakajairwa dzisingatsvi nekuda kwekushandiswa kwakasarudzika kwesimbi/plate (kazhinji mavhiki 12-16 kubva pamill). Kuongorora kwechitatu kunowedzera mazuva 7-14.

Mubvunzo: Ko 904L inogona kushandiswa here pakugadzira mvura yakachena kwazvo?
A: Ehe, asi kazhinji inowedzerwa mwero. Pamvura yakachena (RO, DI, WFI), 316L yakakwana uye inodhura zvishoma. 904L inochengeterwa mamiriro emakemikari akasimba kana ane chloride yakawanda.

Chirevo chePurojekiti - Kutsiva Mapaipi eSulfuric Acid Plant Acid Cooler eEuropean Sulfuric Acid

Nyika:Germany (North Rhine-Westphalia, nzvimbo yemakemikari)
Standard & Giredhi:ASTM B673 UNS N08904 (904L) - pombi yakasungirirwa
Zviyero & Huwandu:

● OD 88.9mm (3″) × Purogiramu 10S (3.05mm WT) – mamita 600 (anenge matani mashanu) – Maitiro eERW

● OD 114.3mm (4″) × Purogiramu 10S (3.05mm WT) – 500 metres (anenge matani matanhatu) – Maitiro eERW

● OD 168.3mm (6″) × Purogiramu 10S (3.40mm WT) – 300 metres (anenge matani 4) – Maitiro eEFW

● OD 219.1mm (8″) × Purogiramu 10S (3.76mm WIT) – 200 metres (anenge matani 4) – Maitiro eEFW
Huwandu:Mamita 1,600, anenge matani 19

Magadzirirwo:ASTM B673 UNS N08904 mhinduro yakanyungudutswa uye yakakangwa, magumo akachekwa. Kuyedzwa kwemvura pa 1.5× dhizaini yekumanikidzwa (dhizaini 1.2 MPa). 100% UT yemapombi eEFW, eddy current yeERW. PMI papombi yega yega. Kuyedzwa kwekuora kunosungirwa paASTM G28 Practice A (ferric sulfate-sulfuric acid) – mwero wekuora < 5 mpy (yakawanikwa 2-3 mpy). Kuyedzwa kwekuora kwepitting paASTM G48 Nzira A (6% FeCl₃, 24h pa40°C) – hapana pitting. Kuyedzwa kwekuora kweintergranular paASTM A262 Practice E (pasi). Kuongororwa kwechitatu neTÜV Germany.

Kushandiswa:Kutsiva mapombi ekutonhodza ane acid uye mitsetse yekufambisa inobatanidzwa mufekitari inodzoreredza sulfuric acid. Mapombi aya anobata hot sulfuric acid (85-93% H₂SO₄) pa70-90°C kubva padanho rekunyudza kuenda kuacid cooler. Mapombi e316L apfuura akakundikana mushure memwedzi gumi nemisere nekuda kwengura uye maburi. 904L yakasarudzwa nekuda kwekudzivirira kwayo zvakanyanya sulfuric acid yakawanda pakupisa kwakakwira.

Matambudziko ehunyanzvi nemhinduro:

●Kuora mu sulfuric acid inopisa (85-93%, 70-90°C)– 316L inoora pamitengo inopfuura 50 mpy pasi pemamiriro ezvinhu aya. 904L ine nickel yayo yakawanda, chromium, molybdenum, uye mhangura inopa mwero wekuora < 5 mpy. Womic yakaitwa ASTM G28 Practice A bvunzo pamidziyo yesimbi yebase ne weld samples. Mwero wekuora: base metal 2.1 mpy, weld 2.8 mpy – iri pasi pemuganhu we5 mpy. Mutengi anotenderwa.

●Kudzivirira ngura yesimbi ye weld– Nzvimbo yekuwedera ndiyo inonyanya kukuvadzwa. Womic yakashandisa input yekupisa kushoma (≤ 1.2 kJ/mm) uye ERNiCrMo-3 filler. Sampuli dzekuwedera dzakapasa bvunzo yeG28 ne corrosion rate 2.8-3.2 mpy. Microstructure haina kuratidza mvura yechikamu chechipiri.

●Kupidigura gomba pakupisa kwakakwirira– Asidhi iyi ine ma chloride (anobva mumvura). 904L's PREN 35-40 inopa kudzivirira makomba. Womic yakaita bvunzo yeG48 pitting pa40°C (yakanyanya kuoma kupfuura tembiricha yekushandira 70°C? Tembiricha yekuedza chaiyo 40°C yakaderera, asi FeCl₃ inokasira). Mhedzisiro: hapana makomba mushure memaawa makumi manomwe nemaviri.

●Kuora kwepakati pegranular mushure mekushongedza– 904L ine kabhoni shoma (≤ 0.020%), asi kunyungudutsa kwemvura kuchiri kudiwa. Womic yakaita kunyungudutsa kwemvura yese pa1100°C, mvura ichidzima. Bvunzo yeASTM A262 Practice E yakabudirira.

●Maitiro ekushongedza munda– Chikwata chekugadzirisa fekitari chaida WPS yakakwaniriswa yekugadzirisa. Womic yakapa makuponi gumi nemashanu eweld neWPS vachishandisa GTAW, ERNiCrMo-3 filler, preheat 10-20°C, interpass ≤ 120°C, heat input ≤ 1.2 kJ/mm. Makuponi akapasa RT, PT, uye G28 testing.

●Kutakura zvinhu kuenda kufekitori yemakemikari yeGerman– Mapaipi akatumirwa kubva kuShanghai kuenda kuchiteshi cheHamburg, ndokuzoendeswa kunzvimbo yacho nerori. TÜV Germany yakaongorora mapaipi kuHamburg. Matani ese gumi nemapfumbamwe akaunzwa mukati memavhiki gumi. Pakeji yemagwaro (MTC 3.2, mishumo yebvunzo) akaunzwa nemagetsi.

Mhedzisiro:Mapaipi matsva e904L akaiswa mukati menguva yechitatu yekushanda kwekota ya2024. Mushure memwedzi gumi nemiviri yekushanda, ongororo yakaratidza kuti hapana ngura inoyerwa, hapana gomba, uye hapana kubuda kwemvura. Mutengi anotarisira hupenyu hwebasa hwemakore gumi nemashanu zvichikwira (vs gore rimwe nehafu re316L). Womic Steel ikozvino ndiyo mutengesi akakodzera wemapaipi ebasa re sulfuric acid mufekitori iyi yemakemikari.

Bata nesu:
Webhusaiti: www.womicsteel.com
E-mail: sales@womicsteel.com

Nhare / WhatsApp / WeChat:
Victor: +86 15575100681
Jack: +86 18390957568

Womic Steel – Mubatsiri wako wakavimbika weASTM B673 UNS N08904 mapaipi esimbi isina ngura akasungirirwa ezvirimwa zvesulfuric nephosphoric acid, masisitimu eFGD, kutonhodza mvura yegungwa, uye sevhisi yemakemikari akasimba pasi rese.