Cov khoom zoo tshaj plaws rau Seawater Desalination Nroj Tsuag - Kev Paub

Phau ntawv qhia no muab cov kws tsim cov nroj tsuag, cov kws tsim khoom tsim khoom, thiab pab pawg ua haujlwm nrog asystematic, cov ntaub ntawv -tsav lub moj khaumrau kev xaiv cov ntaub ntawv raug rau txhua ntu loj ntawm seawater desalination cog - seb SWRO (Seawater Reverse Osmosis), MSF (Multi-Stage Flash), MED (Multi-Effect Distillation), lossis hybrid configurations.

Best Material for Seawater Desalination Plants

Cov ntaub ntawv pom zoo los ntawm Technology

SWRO cog:2205 Duplexthiab2507 Super Duplexrau siab- sab piping; 254 SMO lossis AL-6XN rau high-Cl⁻ concentrate kwj

MSF Thermal Nroj Tsuag: Titanium Qib 2 rau evaporator raj thiab cua sov exchangers; Alloy 625 rau qhov tseem ceeb fittings

MED Nroj Tsuag: Titanium Qib 2 rau qhov chaw hloov hluav taws xob; AL-6XN lossis 2507 rau cov kav dej

Seawater Intake (tag nrho cov nroj tsuag): 2205 Duplex raws li lub hauv paus; upgrade rau 2507 rau qhov chaw txhoj puab heev

Thaum tshav kub kub Exchangers (tag nrho cov nroj tsuag): Titanium Qib 2 los yog 7 rau raj; siab tshaj lifecycle tus nqi nyob rau hauv seawater kev pab cuam

Seawater tsis yog dej qab ntsev xwb. Nws yog ib qho nyuaj, dynamic electrolyte uas muaj chlorides, sulfates, bicarbonates, yaj gases (oxygen, CO₂, H₂S hauv qee qhov chaw), cov kab mob lom neeg, thiab cov khib nyiab tshem tawm - tag nrho ntawm qhov kub thiab txias uas tuaj yeem nyob ze ntawm - khov arctic feedwater mus rau 120℃porcelain brine hauv MSF. Txhua yam ntawm cov khoom no cuam tshuam cov khoom degradation.

Nkag siab txog cov txheej txheem corrosion yog thawj kauj ruam mus rau kev xaiv cov khoom raug. Muaj rau qhov kev hem thawj tseem ceeb uas cov engineers yuav tsum tsim tawm tsam:

Seawater Desalination Plants

Primary Corrosion Mechanisms hauv Desalination Service:

Pitting Corrosion: Localized nres pib los ntawm chloride ions ntawm passive zaj duab xis tsis xws luag. Hom tsis ua haujlwm feem ntau rau cov hlau tsis muaj steel hauv dej hiav txwv. Tiv thaiv los ntawm kev ua kom PRE> 40 rau tag nrho cov dej hiav txwv immersion.

Crevice Corrosion: tshwm sim hauv qhov chaw kaw (hauv qab gaskets, flanges, deposits) qhov twg cov electrolyte ua depleted ntawm oxygen thiab pH tee. hnyav dua pitting - yuav tsum tau ntau dua PRE lossis lwm yam khoom siv.

Stress Corrosion Cracking (SCC): Kev sib xyaw ntawm tensile stress + chloride ib puag ncig + susceptible microstructure ua rau nkig tawg sai sai. Austenitic stainless hlau muaj qhov cuam tshuam siab tshaj ~ 60℃hauv chloride ib puag ncig.

Microbiologically Induced Corrosion (MIC): Sulfate-txo cov kab mob (SRB) thiab hlau-oxidizing kab mob colonize nto, tsim aggressive hauv zos chemistry nyob rau hauv biofilms. Muaj peev xwm pib pitting hauv qib txwv tsis pub tiv thaiv abiotic chloride nres.

Kev yaig-Corrosion: Siab- dej hiav txwv nrawm + cov khoom raug tshem tawm tshem tawm cov oxide zaj duab xis sai dua li nws tuaj yeem hloov kho, ua rau cov hlau poob sai. Qhov tseem ceeb nyob rau hauv lub twj tso kua mis impellers, li qub, thiab lub luj tshib.

Galvanic Corrosion: Thaum ob lub hlau sib txawv yog hluav taws xob txuas nrog hauv dej hiav txwv (ib qho hluav taws xob muaj zog), cov hlau tsis zoo corrodes nyiam dua. Kev rho tawm yog qhov tseem ceeb ntawm txhua qhov bi-metallic joint.

Kev xaiv cov khoom siv tau zoo pib nrog tus cwj pwm zoo ntawm qhov chaw pabcuam. Cov lus hauv qab no qhia txog qhov tseem ceeb ntawm cov dej hiav txwv thiab cov txheej txheem ntws hauv cov nroj tsuag desalination, nrog rau lawv qhov cuam tshuam rau kev xaiv cov khoom.

Parameter	Hom Ntau Yam / Tus Nqi	Qhov tseem ceeb rau kev xaiv cov khoom
Chloride concentration	18,000–35,000 mg/L	Primary tsav ntawm pitting & crevice corrosion. PRE> 40 xav tau rau kev pabcuam raus dej.
Kub (ambient)	5-35 ° F (41-95 ° F)	Qhov kub siab dua ua rau txhua qhov kev txhim kho corrosion.
Kub (MSF / MED brine)	Mus txog 120℃(248℃F)	Tshem tawm feem ntau austenitic SS; xav tau titanium lossis siab -Ni alloys.
pH	7.9-8.3 (hli)	Ua kua qaub nyob rau hauv CO₂- nplua nuj concentrate kwj; tuaj yeem poob rau 6.0-6.5.
Cov pa oxygen (DO)	5-9 mg/l	High DO accelerates uniform thiab galvanic corrosion.
Biofouling muaj peev xwm	Siab (MPN> 10⁴/mL)	Microbiologically induced corrosion (MIC) yog qhov txaus ntshai heev.
Scaling tendency (CaCO₃/CaSO₄)	High concentration	Scale txhawb crevice corrosion nyob rau hauv deposits.
Flow ceev	0.5-3.5m / s raug	Tsawg tshaj tawm → biofouling; siab tshaj tawm → erosion -corrosion.
H₂S (hauv qee cov dej ntws)	0-5 mg / L	Yuav tsum tau ua raws NACE MR0175 rau cov kwj cuam tshuam.

Cov peev txheej: IDA (International Desalination Association) Phau Ntawv Kev Nyab Xeeb Dej; LEEJ TWG Qhia Txog Kev Haus Dej- Dej Zoo; NACE SP0108; IEC 60068 Kev Ua Haujlwm

Lub ntsiab lus tseem ceeb ntawm Engineering: Pitting Resistance Equivalent (PRE)

PRE=%Cr + 3.3 × %Mo + 16 × %N

Cov mis no kwv yees qhov ua rau pitting thiab crevice corrosion nyob rau hauv chloride-muaj cov xov xwm.

PRE < 25: Tsuas yog tsim rau cov dej tshiab lossis ib puag ncig me me.

PRE 25–35: Kev pabcuam kev lag luam dav dav; txwv kev raug dej hiav txwv nkaus xwb.

PRE 35–40: Kev tiv thaiv zoo rau seawater pitting; marginal rau tag nrho immersion.

PRE > 40: Yuav tsum tau ua kom cov dej hiav txwv tsis tu ncua thiab kev desalination concentrate kwj.

PRE> 45: Kev ua haujlwm siab dua; tau teev tseg rau qhov kev pabcuam chloride hnyav tshaj plaws.

Plaub tsev neeg cov khoom tseem ceeb yog siv rau hauv seawater desalination nroj tsuag. Txhua tus muaj qhov sib txawv ntawm qhov profile, tus nqi qauv, thiab ntau yam ntawm daim ntawv thov. Optimal cog tsim feem ntau sib txuas cov ntaub ntawv los ntawm ntau tsev neeg, sib phim rau cov kev xav tau tshwj xeeb ntawm txhua ntu.

Material Families Overview

Austenitic Stainless hlau (316L, 317L, 904L, 254 SMO, AL-6XN)

Austenitic stainless steels are the most widely used metal family in desalination plants. They offer excellent weldability, good mechanical properties, a broad range of product forms, and well-understood fabrication characteristics. The lower-alloyed grades (316L, 317L) are cost-effective for mild service, while the 6% molybdenum super-austenitic grades (254 SMO, AL-6XN) bridge the performance gap between standard stainless steel and nickel alloys. All austenitic grades are susceptible to SCC in hot (>60℃) cov tshuaj chloride - ib qho kev txwv tseem ceeb hauv kev pabcuam thermal desalination

Duplex & Super Duplex Stainless Hlau (2205, 2507, 2304)

Duplex stainless steels ua ke nrog dual austenite-ferrite microstructure uas muab kwv yees li ob npaug ntawm cov khoom muaj zog ntawm cov qib sib npaug austenitic. Qhov txiaj ntsig ntawm lub zog no ua rau cov phab ntsa nyias nyias thiab cov qauv sib zog, ib nrab offsetting tus nqi khoom siab dua. Cov theem ferrite kuj tseem muaj qhov zoo dua SCC tsis kam tshaj cov qib austenitic tag nrho. Qib 2205 yog qhov ua haujlwm ntawm SWRO cov nroj tsuag; 2507 super duplex tau teev tseg qhov twg yuav tsum muaj lub zog siab tshaj plaws thiab kev tiv thaiv corrosion, xws li siab - lub cev twj tso kua mis, lub zog rov qab siv, thiab cov qauv siv hauv qab hiav txwv.

Nickel Alloys (Alloy 625, C-276, Alloy 825)

Nickel-puag alloys nyob rau sab saum toj qib ntawm corrosion kuj. Alloy 625 thiab C-276 muaj kev tiv thaiv zoo rau pitting, crevice corrosion, thiab SCC thoob plaws tag nrho cov dej hiav txwv kub thiab chloride concentrations ntsib hauv kev pab cuam desalination. Lawv tau teev tseg rau qhov tseem ceeb tshaj plaws thiab nyuaj tshaj plaws - rau- khaws cov khoom siv: cov khoom siv hluav taws xob sib txuas hauv MSF cov nroj tsuag, valve trim hauv brine concentrate kab, twj tso kua mis impellers tuav cov kwj deg, thiab txhua qhov chaw uas tsis ua hauj lwm yuav tsum tau kaw cov nroj tsuag. Lawv cov nqi siab heev txwv lawv rau cov phiaj xwm, cov nqi siab.

Titanium (Qib 2, Qib 7) thiab Tsis yog-Cov ntaub ntawv hlau

Titanium yog cov khoom siv rau cov dej hiav txwv kub exchangers thoob ntiaj teb. Nws cov yeeb yaj kiab oxide passive (TiO₂) yog qhov tshwj xeeb ruaj khov nyob rau hauv ib puag ncig chloride thiab tseem ceeb tiv thaiv txhua hom dej hiav txwv corrosion - suav nrog pitting, crevice, thiab SCC - ntawm qhov kub txog li 260 degree. Nws qhov ceev tsawg (4.51 g / cm³) piv rau cov nickel alloys kuj muaj qhov hnyav dua. Qib 7 (Ti + 0.15% Pd) txuas qhov kev tiv thaiv no rau ib puag ncig nrog txo cov kua qaub. Cov khoom tsis yog-cov ntaub ntawv hlau - GRP (iav{12}}Plastic Reinforced), HDPE, FRP, PVC - yog dav siv rau qis dua- cov kav dej siab, RO siab cov hlab ntsha, thiab cov khoom siv dej cia uas tsis tas yuav muaj kev tiv thaiv corrosion thiab qhov hnyav yog qhov tseem ceeb.

Cov lus hauv qab no nthuav tawm cov tshuaj nominal uas tau txheeb xyuas thiab suav PRE qhov tseem ceeb rau thawj cov khoom siv hlau siv hauv seawater desalination cog kev tsim kho. PRE yog ib qho kev ntsuas tseem ceeb tshaj plaws rau kev ntsuam xyuas cov khoom siv thawj zaug.

Qib / Alloy	Cr (%)	Tsis muaj (%)	Mo (%)	N (%)	PRE*	Cov Ntsiab Lus Ntxiv / Lus Cim
316L SS AW	16–18	10–14	2–3	-	~24	Tsawg-C; lub hom phiaj dav dav austenitic
3 17l swv	18–20	11–15	3–4	-	~28	Siab Mo dua 316L
2205 Duplex	21–23	4.5–6.5	2.5–3.5	0.08–0.20	~35	Duplex; siab zog + SCC tiv taus.
254 PAB (S31254)	20	18	6	0.18–0.22	~43	6Mo super-austenitic; seawater qib
2507 Super Duplex	24–26	6–8	3–5	0.24–0.32	~42	Siab tshaj SS zog; HPHT subsea
AL-6XN (N08367)	20–22	23.5–25.5	6–7	0.18–0.25	~47	6Mo + siab Ni; zoo tshaj 254 SMO
Alloy 625 (N06625)	20–23	Ntau dua lossis sib npaug li 58	8–10	-	~51	Ni-base; concentrated brine / HX
Alloy C-276 (N10276)	14.5–16.5	Ntau dua lossis sib npaug li 57	15–17	-	~73	corrosion heev; acid + Cl ⁻
Titanium Gr . 2	-	-	-	-	N/A	Ntshiab Ti; zoo tshaj plaws seawater kuj
Titanium Gr . 7	-	-	-	-	N/A	Ti + 0.15% Pd; superior crevice res.
TIAB SA 2304	21–24	3–5.5	0.05–0.6	0.05–0.20	~26	Tsawg-Mo duplex; kev xaiv tus nqi qis dua

*PRE=%Cr + 3.3×%Mo + 16×%N (xws li nominal compositions midpoints). PRE> 40 yuav tsum tau ua rau dej hiav txwv tsis tu ncua. Cov peev txheej: ASTM A240, A790, B575, B443; ASME SB-338; Titanium: ASTM B265.

Cov tshuab ua haujlwm tseem ceeb tshwj xeeb tshaj yog nyob rau hauv siab -siab SWRO systems (ua haujlwm ntawm 55-82 bar) thiab hauv cov nroj tsuag thermal uas thermal cycling ua rau qaug zog loading. Lub zog zoo ntawm cov qib duplex feem ntau tso cai rau cov phab ntsa thickness txo qis uas ib nrab offset lawv cov nqi siab dua.

Qib / Alloy	Tensile (MPa)	Tawm tswv yim (MPa)	Elongation (%)	Hardness	Qhov ceev (g / cm³)
316L SS AW	485–620	170–310	Ntau dua lossis sib npaug li 40	Tsawg dua lossis sib npaug li 95 HRB	7.98
3 17l swv	515–690	205–310	Ntau dua lossis sib npaug li 35	Tsawg dua lossis sib npaug li 95 HRB	8.00
2205 Duplex	620–880	450–650	Ntau dua lossis sib npaug li 25	Tsawg dua lossis sib npaug li 31 HRC	7.80
254 SIB	650–800	300–450	Ntau dua lossis sib npaug li 35	Tsawg dua lossis sib npaug rau 96 HRB	7.98
2507 Super Duplex	795–900	550–650	Ntau dua lossis sib npaug li 15	Tsawg dua lossis sib npaug li 32 HRC	7.80
AL-6 XN	690–800	310–380	Ntau tshaj los yog sib npaug rau 30	Tsawg dua lossis sib npaug rau 96 HRB	8.06
alloy 625	830–1100	414–690	Ntau tshaj los yog sib npaug rau 30	Tsawg dua lossis sib npaug li 25 HRC	8.44
Alloy C-276	690–790	283–380	Ntau dua lossis sib npaug li 40	Tsawg dua lossis sib npaug li 100 HRB	8.89
Titanium Gr . 2	345–515	276–450	Ntau dua lossis sib npaug li 20	Tsawg dua lossis sib npaug li 80 HRB	4.51
Titanium Gr . 7	345–515	276–450	Ntau dua lossis sib npaug li 20	Tsawg dua lossis sib npaug li 80 HRB	4.51

Lus Cim: Cov txiaj ntsig sawv cev ntawm cov ntawv pov thawj zeb thiab ASTM yam tsawg kawg nkaus. Cov khoom muaj tseeb nyob ntawm kev kho cua sov, cov khoom tsim, thiab phab ntsa thickness. Titanium tus nqi rau ASTM B338. Cov peev txheej: ASTM A312, A790, B443, B574, B338; ASM Phau Ntawv Qhia Vol. 2.

Cov matrix no muab cov txiaj ntsig zoo tiv thaiv corrosion thoob plaws tsib hom kev ua tsis tau zoo tshaj plaws hauv qhov chaw desalination. Kev ntsuam xyuas yog ua raws li cov ntaub ntawv soj ntsuam luam tawm, cov ntaub ntawv kev ua haujlwm hauv cheeb tsam, thiab cov ntaub ntawv tshawb fawb txog cov ntaub ntawv.

Qib / Alloy	Pitting (Cl⁻)	Crevice Corr.	SCC Tawm tsam.	MIC Tawm tsam.	Kev yaig-Corrosion
316L SS AW	Nruab nrab	pluag	Nruab nrab	Nruab nrab	Nruab nrab
3 17l swv	Zoo	Nruab nrab	Nruab nrab	Nruab nrab	Zoo
2205 Duplex	Zoo heev	Zoo	Zoo heev	Zoo	Zoo heev
254 SIB	Superior	Superior	Zoo	Zoo	Superior
2507 Super Duplex	Superior	Superior	Zoo heev	Zoo	Superior
AL-6 XN	Superior	Superior	Zoo	Zoo	Superior
alloy 625	Zoo heev	Zoo heev	Zoo heev	Zoo heev	Zoo heev
Alloy C-276	Zoo heev	Zoo heev	Zoo heev	Zoo heev	Zoo heev
Titanium Gr . 2	Zoo heev	Zoo	Zoo heev	Zoo heev	Zoo
Titanium Gr . 7	Zoo heev	Zoo heev	Zoo heev	Zoo heev	Zoo

Kev ntsuas ntsuas: Nruab Nrab < Zoo < Zoo heev < Superior < Zoo. Kev ntsuam xyuas qhia txog kev ua tau zoo raws li cov dej hiav txwv desalination. SCC kev ntsuam xyuas rau qib austenitic xav tias kub hauv qab 60 degree; siab dua 60 degree, SCC kev pheej hmoo nce ntau. Qhov chaw: NACE TM0177, TM0284, ISO 15156; Outokumpu Corrosion Phau Ntawv; Tshwj xeeb Metals Corporation cov ntawv xov xwm.

Ib tsob nroj desalination tsis yog ib puag ncig corrosive - nws yog ntau. Lub salinity, kub, siab, pH, tshaj tawm, thiab kev thauj khoom lom neeg txhua yam hloov pauv ntawm cov dej hiav txwv nkag mus rau cov khoom siv dej. Tshooj lus no muab cov lus qhia tshwj xeeb rau txhua ntu cog qoob loo loj.

Plant Section / Component	Pom zoo thawj zaug	Kev xaiv thib ob	Tseem ceeb	Critical Standard
Seawater intake screens & tuav	2205 Duplex	2507	Biofouling, yaig, Cl⁻	ASTM A790 Cov Lus Qhia Tshwj Xeeb
Intake / supply pipelines (faus)	2205 Duplex	316L + txheej	Cl⁻ pitting, MIC, SCC	ASTM A790, NACE SP0169
Ua ntej- kho cov hlab ntsha	316L / 2205	TIAB SA 2304	General corrosion, siab	ASTM A 312 Cov Lus Qhia
RO siab hlab ntsha (tsev)	TSI / 316L	2205	Cl⁻, siab siab	ASME Sec. VIII
RO pub / concentrate piping	2205/254 SMO	2507	High Cl⁻ concentrate	ASTM A312, A790
RO siab - cov twj tso kua mis	2507/625	TIAB SA 2205	Erosion{0}}corrosion, cavitation	ASME / API 610
Cov khoom siv hluav taws xob rov qab (ERD)	2507 Super Duplex	alloy 625	HPHT, yaig, Cl⁻	ISO 13709 Kev Tswj Xyuas Kev Lag Luam
MSF evaporator tubes	Titanium Gr . 2	alloy 625	High temp brine, scaling	ASTM B 338 Cov
MSF flash chambers	316L (liab) / Alloy 825	Titanium Gr . 2	Kub brine, Cl⁻, scaling	ASTM B 424 2
MED evaporator tubes	Titanium Gr . 2	AL-6 XN	Kub Cl⁻ brine, biofouling	ASTM B 338 Cov
Thaum tshav kub kub exchanger tubes	Titanium Gr{0}} / 7	alloy 625	Cl⁻ pitting, crevice	TEMA, ASTM B338
Concentrate tawm piping	2507/254 SMO	AL-6 XN	Heev Cl⁻ concentrate	ASTM A 312 Cov Lus Qhia
Chemical dosing systems	316L / Alloy C-276	904L	Acid + oxidant dosing	ASTM A312, B574 thiab ASTM A312
Cov khoom siv dej cia tank	304L / 316L (liab)	GRP	Tsawg-Cl⁺, tsis tshua muaj corrosion	AWM D100
Instrumentation & tswj tubing	316L / 2205	254 SIB	Cl⁻, vibration, siab	ASTM A 269 Cov khoom siv

Lus Cim: GRP=iav-Reinforced Yas; HDPE=Siab -Polyethylene ntom. Txhua qhov kev xaiv hlau yog suav tias tsim nyog cov txheej txheem weld tsim nyog thiab tom qab- kev tshuaj xyuas vuam. Kev xaiv zaum kawg yuav tsum suav rau ntawm qhov chaw- dej tshwj xeeb chemistry. Cov qauv teev tseg yog cov ntaub ntawv tseem ceeb; cov lej ntxiv tuaj yeem siv los ntawm kev txiav txim.

Lub tshuab desalination - SWRO, MSF, MED, lossis hybrid - hauv paus tsim cov tswv yim xaiv cov khoom. Kev khiav hauj lwm kub, siab, thiab kwj chemistry sib txawv ntawm cov thev naus laus zis, raws li cov ntsiab lus hauv qab no.

Txheej Txheem Technology	Cov xwm txheej ua haujlwm	Cov ntaub ntawv nyiam	Qhov Tseem Ceeb
SWRO (Seawater RO)	25-82 bar; 20-45 degree; siab Cl⁻	2205, 2507, 254 SMO, AL-6XN	Siab -PRE alloys tiv taus Cl⁻
MSF (Multi{0}}Stage Flash)	Txog li 120 degree; kub brine recycle	Titanium Gr{0}}, Alloy 625, 316L	Thermal stability; scale/brine kuj
MED (Ntau-Cov nyhuv Distillation)	60-70 degree; ntau yam teebmeem	Titanium Gr . 2, AL-6XN	Superior HX kev ua tau zoo hauv cov brine sov
BWRO (Bracish Water RO)	10-25 bar; qis dua Cl⁻	316L, 2205	Tsawg Cl⁻ tso cai rau tus nqi - siv tau SS
Hybrid SWRO + MSF / SWRO + MED	Ua ke thermal + membrane	Titanium, 2507, Alloy 625	Zoo tshaj - hauv - chav kawm rau kev xav tau sib xyaw
ED / EDR (Electrodialysis)	Ambient; tsis tshua muaj siab	316 L, 2205, GRP	Tsawg-corrosion membrane ib puag ncig

SWRO=Seawater Rov qab Osmosis; MSF=Multi-Stage Flash; MED=Ntau-Cov nyhuv Distillation; BWRO=Brackish Dej RO; ED/EDR=Electrodialysis/Reversal. GRP=iav-Reinforced Plastic.

316L yog qhov pib rau kev xaiv stainless hlau hauv txhua qhov dej-txog daim ntawv thov. Nrog rau PRE ntawm kwv yees li 24, nws muab kev tiv thaiv corrosion txaus rau qis - rau - nruab nrab chloride ib puag ncig - cov khoom siv dej xa dej, cov twj tso kua mis hauv cov dej tsis muaj - cov kwj dej nruj, cov tshuaj siv tshuaj skid siv, thiab cov dej tsis qab los yog qis - chloride pre{9s.}treat Nws yog kiag li tsis haum rau ncaj qha dej hiav txwv immersion, mloog zoo kwj, los yog tej kab tuav chloride concentrations saum toj no kwv yees li 5,000 mg/L yam tsis muaj ntxiv corrosion. Txawm li cas los xij, rau cov khoom lag luam sab hauv dej ntawm SWRO cov nroj tsuag, qhov twg cov dej tsis tshua muaj -mineral- cov ntsiab lus permeate, 316L tseem raug nqi- siv tau thiab tsim nyog.

Tsim nyog rau:Cov khoom siv kav dej, dej tshiab- sab HX circuits, tshuaj npaj tank, ntsuas kev sib txuas hauv qis -Cl⁻ kev pabcuam.

Tsis txhob siv rau:Seawater mov kab, RO concentrate, brine tawm, seawater heat exchangers, MSF/MED brine - sab kev pab cuam.

Qib 2205 Duplex - SWRO Backbone

Qib 2205 yog cov khoom siv dav dav tshaj plaws rau SWRO cog kev tsim kho thoob ntiaj teb. Nws PRE ntawm kwv yees li 35, ua ke nrog ob zaug lub zog tawm los ntawm 316L thiab zoo heev SCC tsis kam nyob rau hauv nruab nrab - dej hiav txwv kub, ua rau nws tus nqi - kev xaiv zoo tshaj plaws rau cov kav dej seawater, ua ntej - cov hlab ntsha kho, RO siab - cov kav dej siab, thiab kev siv cov khoom siv dav dav. Kev muaj peev xwm tsim nyog rau kev pabcuam qaub raws li NACE MR0175 yog qhov zoo ntxiv rau cov nroj tsuag nrog H₂S hauv cov dej pub. 2205 yog muaj thoob plaws ntiaj teb hauv txhua daim ntawv yuav tsum tau ua - seamless thiab welded yeeb nkab, fittings, flanges, phaj, thiab bar - nrog kev sib tw txhuas lub sij hawm thiab lub ntiaj teb loj fabrication puag.

Tsim nyog rau:Seawater supply piping (qis dua 60 degree), RO pub thiab mloog zoo piping, twj tso kua mis vaj tse, pre-kho lim cov hlab ntsha, intake screening structures.

Kev txwv kub:Tsis txhob siv siab tshaj 280 degree; saib xyuas rau sigma-theem embrittlement kev pheej hmoo siab tshaj 250℃nyob rau hauv ntev -lub sij hawm thermal service.

Vuam ceev faj:Yuav tsum tau tswj cov cua sov nkag thiab raug muab tub lim hlau (2209) kom tswj tau theem sib npaug. Cov txheej txheem tsim nyog yog qhov tseem ceeb.

Detailed Material Analysis

Qib 2507 Super Duplex - Lub Siab -Kev Txhim Kho Kev Ua Haujlwm

2507 tau teev tseg thaum 2205 tsis tuaj yeem ua tau raws li kev tiv thaiv corrosion lossis lub zog xav tau ntawm daim ntawv thov. Nrog rau PRE ntawm kwv yees li 42, tawm lub zog ntawm 550-650 MPa, thiab zoo heev rau pitting, crevice, thiab SCC, 2507 yog qib xaiv rau SWRO zog rov qab pab kiag li lawm (ERD), siab - twj tso kua mis internals, concentrated paug manifolds, thiab txhua qhov chaw uas tsis ua hauj lwm yuav raug nqi thiab txaus ntshai. Nws zoo heev qaug zog kuj haum rau kev co - cov twj tso kua mis thiab compressor vaj tse. Tus nqi tshaj 2205 yog qhov ncaj ncees hauv cov ntawv thov uas qhov tsis ua haujlwm yuav tsum tau ua tiav cov nroj tsuag kaw thiab hloov cov khoom sib txuas.

Tsim nyog rau:ERDs, HP twj tso kua mis lub cev & impellers, concentrated discharge systems, deepwater intake structures, siab -ceev piping khoov.

254 SMO & AL-6XN - 6% Mo Super-Austenitic Qib

6% molybdenum super- qib austenitic nyob rau hauv ib qho chaw tshwj xeeb: lawv muab PRE qhov tseem ceeb ntawm 43-47, nce los yog siab tshaj ntawm super duplex stainless hlau, thaum khaws cov austenitic microstructure nrog nws cov txiaj ntsig zoo - ductility zoo heev, yooj yim ntawm kev ua haujlwm txias 5}, thiab cov txheej txheem yooj yim dua (UNS S31254) thiab AL-6XN (UNS N08367) yog ob qib uas tau teev tseg ntau tshaj plaws.

AL-6XN cov ntsiab lus ntau dua nickel (24% vs 18%) muab kev tiv thaiv zoo tshaj hauv kev txo -acid ib puag ncig thiab txhim kho SCC kev tiv thaiv. Ob qib yog dav siv rau seawater piping systems nyob rau hauv offshore platforms thiab desalination nroj tsuag nyob rau hauv cov cheeb tsam nrog tshwj xeeb aggression seawater (sov, siab - salinity, siab - lom-kev ua si).

Tsim nyog rau:Seawater piping nyob rau hauv sov / tropical ib puag ncig, mloog zoo headers, tshuaj txhaj kab, flanges thiab fittings qhov twg austenitic weldability yog nyiam dua duplex.

Titanium Qib 2 & Qib 7 - Thermal Plant Standard

Rau cov cua kub exchanger raj hauv MSF thiab MED desalination cov nroj tsuag, titanium yog qhov tsis paub meej engineering xaiv. Qib 2 (kev lag luam ntshiab titanium) yog tus qauv thoob ntiaj teb rau seawater heat exchanger tubing rau ntau tshaj 50 xyoo. Nws qhov kev ua haujlwm tsis zoo hauv dej hiav txwv yog khaws cia los ntawm ze - qhov kub thiab txias mus txog 260 degree, npog tag nrho lub hnab ntawv ua haujlwm ntawm cov nroj tsuag thermal desalination. TiO₂ passive zaj duab xis hloov kho tam sim ntawd thaum txhua yam kev puas tsuaj thiab yog impervious rau seawater chlorides, yaj oxygen, thiab biofouling kab mob.

Qib 7, nrog rau nws cov palladium ntxiv, txuas ntxiv qhov kev tiv thaiv no kom txo tau -acid ib puag ncig - cuam tshuam rau cov kua qaub ntxuav (CIP) daim ntawv thov hauv desalination cog tu. Titanium qhov tsawg ntom ntom (4.51 g / cm³) txo qhov hnyav tuag ntawm cov khoom siv hluav taws xob loj thiab yog ib qho txiaj ntsig zoo hauv FPSO-raws li kev siv desalination.

Tsim nyog rau:MSF evaporator tubes, MED tshav kub hloov chaw, condenser raj, seawater coolers, tag nrho cov tshav kub exchangers nyob rau hauv kev sib cuag nrog seawater los yog kub brine.

Qhov txiaj ntsig tseem ceeb:Tus nqi qis tshaj tag nrho lub neej rau kev siv hluav taws xob hloov pauv - 40+ xyoo kev pabcuam lub neej nrog kev saib xyuas zoo tsis muaj xeb.

Alloy 625 & C-276 - Kev Pabcuam Tseem Ceeb Nickel Alloys

Nickel alloys yog kab kawg ntawm kev tiv thaiv - tau teev tseg thaum txhua qhov kev xaiv tau raug tshuaj xyuas thiab pom tias tsis txaus. Alloy 625 (nrog 8-10% Mo thiab PRE ~ 51) thiab Alloy C-276 (nrog 15-17% Mo thiab PRE ~ 73) muaj kev tiv thaiv zoo rau seawater corrosion nyob rau hauv tag nrho cov kev mob tshwm sim nyob rau hauv desalination kev pab cuam.

Lawv yog siv rau lub twj tso kua mis impellers thiab casing liner tuav kub brine mloog zoo, valve trim nyob rau hauv nruj kev pab cuam, nozzles thiab tshuaj tsuag headers nyob rau hauv MSF flash chambers, thiab ib tug tivthaiv qhov kev tshuaj ntsuam, tu, los yog hloov yog tsis tshua muaj heev nyuaj los yog kim. 8-15 × cov khoom siv tus nqi them nqi tshaj tus qauv stainless hlau txhais tau tias lawv siv tau ua tib zoo tsom rau cov khoom uas tsis ua haujlwm yuav ua rau muaj kev puas tsuaj loj.

Tsim nyog rau:MSF flash chamber nozzles, brine rhaub tube nplooj ntawv, HP twj tso kua mis impellers (kub brine kev pab), valve trim nyob rau hauv aggressive concentrate kab, txaws cheeb tsam.

Kev xaiv cov khoom yog kev txiav txim siab txog lub neej, tsis yog ib chav tsev - kev txiav txim siab nqi. Ib qho kev ua yuam kev hauv engineering yog kev ua kom zoo rau thawj tus nqi peev (CAPEX) thaum tsis quav ntsej tus nqi ua haujlwm (OPEX): kev tshuaj xyuas, tu, tu, kho, thiab thaum kawg hloov ntxov ntxov. Hauv cov nroj tsuag desalination tsim rau 25-40-xyoo kev ua haujlwm lub neej, cov khoom siv tag nrho lub neej muaj nuj nqis txiav txim siab kev lag luam zoo.

Qib / Alloy	Tus nqi ntawm cov khoom siv txheeb ze	Cia siab rau Kev Pabcuam Lub Neej	Kev tu ntau zaus	Total Lifecycle Tus nqi
316L SS AW	Tsawg (1 ×)	10-15 xyoos (mild env.)	High (kev tshuaj xyuas txhua xyoo)	Tsawg - hloov tsis tu ncua
2205 Duplex	Nruab nrab (1.6–2 ×)	20-30 xyoo	Nruab nrab	High - tus nqi siv zog
254 SIB	Siab (3-4 ×)	25-35 xyoo	Tsawg	Siab heev - kev pabcuam ntev, qis OPEX
2507 Super Duplex	Siab (3.5-5 ×)	30-40 xyoo	Tsawg	Zoo heev - subsea & HPHT tsim nyog
AL-6 XN	Siab (4–5 ×)	30-40 xyoo	Tsawg	Zoo heev - siab -Cl⁻ ib puag ncig
alloy 625	Siab heev (8–12 ×)	40+ xyoo	Tsawg heev	Qhov zoo tshaj plaws rau kev pabcuam tseem ceeb
Alloy C-276	Siab heev (10–15 ×)	40+ xyoo	Tsawg heev	Tsuas yog rau cov kua qaub heev + Cl⁻
Titanium Gr . 2	Siab (5–7 ×)	40+ xyoo	Tsawg heev	Qhov zoo tshaj plaws lifecycle rau HX & thermal cog
Titanium Gr . 7	Siab heev (8–10 ×)	40+ xyoo	Zero	Qhov zoo tshaj plaws rau siab -crevice- kev pabcuam pheej hmoo

Tus nqi txheeb ze raws li 2024-2025 kev lag luam thoob ntiaj teb kev lag luam. Tus nqi tiag tiag sib txawv raws cheeb tsam, ntim ntim, daim ntawv khoom, thiab kev ua lag luam. Kev kwv yees lub neej ntawm kev pab cuam yog qhia thiab nyob ntawm kev txhim kho kom zoo, kev ua haujlwm, thiab kev saib xyuas. Kev kwv yees lub neej suav hais tias xaiv qib raug rau ib puag ncig kev pabcuam. Qhov chaw: MEPS International; SMR Pawg; IDA Daim Ntawv Qhia Tus Nqi Dej Desalination.

Tus nqi ntawm kev xaiv cov khoom tsis raug - Tiag -Qhov tshwm sim hauv ntiaj teb

316L hauv dej hiav txwv kev pabcuam → Pitting tsis ua haujlwm hauv 6-24 lub hlis; tsis npaj kaw; tag nrho cov kav dej hloov.

Austenitic SS in hot MSF brine (>60 degree) → SCC tsis ua haujlwm; HX pob hloov pauv; ntau lawm.

Cov pa roj carbon hlau tsis muaj txheej txheej txaus → Extensive corrosion tsis pub dhau 1-2 xyoos; yuav tsum tau hloov ua kom tiav.

Galvanic ua ke tsis muaj kev sib cais → Accelerated corrosion ntawm anodic tivthaiv; ua tsis tiav hauv lub hlis.

Tsis quav ntsej MIC nyob rau hauv qis - ntu nrawm → Pitting los ntawm - phab ntsa tsis ua hauj lwm txawm nyob rau hauv lwm yam - qib tsim nyog.

Txoj cai ntawm tus ntiv tes xoo: 10% kev txuag nyiaj ntawm cov khoom siv uas ua rau 3 lub hlis kaw tus nqi 10-100 × qhov qub txuag.

Tag nrho cov khoom xaiv rau cov nroj tsuag desalination yuav tsum ua raws li cov cai thoob ntiaj teb thiab lub teb chaws. Cov qauv hauv qab no yog cov ntaub ntawv tseem ceeb:

Txheem / Code	Scope & Daim Ntawv Thov
ASTM A312 / A790 Cov Lus Qhia Tshwj Xeeb	Seamless thiab welded austenitic thiab duplex stainless hlau yeeb nkab
ASTM B 338 Cov	Seamless thiab welded titanium thiab titanium alloy raj rau condensers thiab tshav kub exchangers
ASTM B443 / B575	Nickel{0}}chromium-molybdenum alloy phaj, ntawv, sawb, thiab seamless yeeb nkab (Alloy 625 / C-276)
NACE MR0175 / ISO 15156	Cov ntaub ntawv siv rau hauv H₂S- muaj ib puag ncig (kev ua raws li kev pabcuam qaub)
NACE SP0108	Corrosion tswj ntawm cov qauv offshore los ntawm kev tiv thaiv txheej
NACE SP0169	Kev tswj ntawm sab nraud corrosion ntawm faus lossis submerged metallic piping
ASME B31.3	Txheej txheem piping - tsim, khoom siv, fabrication, tshuaj xyuas
ASME Section VIII Div. 1 & 2	Lub nkoj siab tsim thiab kev tsim kho
ISO 16484 / IDA Cov Qauv	Desalination cog tsim thiab kev ua haujlwm yuav tsum tau ua
TEMA Standards	Tubular Exchanger Manufacturers Association - tshav kub exchanger tsim
WHO Cov Lus Qhia rau Kev Haus Dej - Dej Zoo	Cov khoom siv dej kom zoo
EN 10088 / ISO 15510	Stainless hlau tshuaj muaj pes tsawg leeg thiab cov qauv tsim

Daim ntawv teev npe no yog tus sawv cev, tsis yog tag nrho. Ntxiv cov qauv hauv teb chaws, cov cai hauv zos cov cai, thiab cov kev qhia tshwj xeeb yuav raug siv. Ib txwm txheeb xyuas cov lej uas siv tau nrog rau cov cai tswj hwm cuam tshuam thiab pab pawg ua haujlwm engineering.

Q1: Dab tsi yog cov khoom siv zoo tshaj plaws rau seawater desalination cog piping?

Nws nyob ntawm cov ntu tshwj xeeb thiab cov txheej txheem thev naus laus zis. Rau cov nroj tsuag SWRO, Qib 2205 duplex stainless hlau yog kev lag luam - cov khoom siv pob txha rau seawater thiab RO siab - sab piping. Rau siab dua -chloride concentrate kwj, 2507 super duplex lossis 254 SMO yog nyiam. Rau cov nroj tsuag thermal (MSF / MED), titanium Qib 2 yog qhov kev xaiv tsim los rau cov cua kub exchanger tubing, nrog 2205 lossis 2507 rau cov kav dej.

Q2: 316L stainless hlau puas tuaj yeem siv rau hauv seawater desalination?

Qib 316L muaj PRE ntawm kwv yees li 24, uas tsis txaus rau kev tso dej ncaj qha rau hauv dej hiav txwv. Hauv cov nroj tsuag desalination, 316L yog qhov tsim nyog rau cov khoom siv dej hauv cov kav dej (tsawg chloride), cov txheej txheem kev npaj tshuaj, kev sib txuas cov cuab yeej hauv cov kev pabcuam chloride qis, thiab txhua ntu tsis sib cuag nrog dej hiav txwv lossis brine concentrate. Nws yuav tsum tsis txhob siv rau cov kav dej hiav txwv, RO concentrate piping, lossis cov khoom siv hluav taws xob sib txuas nrog dej hiav txwv.

Q3: Vim li cas titanium tau teev tseg rau cov khoom siv hluav taws xob hauv cov nroj tsuag desalination?

Titanium's TiO₂ passive zaj duab xis yog qhov tseem ceeb tiv thaiv dej hiav txwv pitting, crevice corrosion, thiab kev ntxhov siab corrosion tawg ntawm txhua qhov kub txog 260 degree. Qhov no npog tag nrho lub hnab ntawv thermal ntawm MSF thiab MED cov nroj tsuag. Titanium Qib 2 tubes tau pom tias 40+ xyoo kev pab cuam nyob hauv seawater heat exchangers thoob ntiaj teb, xa tus nqi qis tshaj tag nrho cov nqi lifecycle rau daim ntawv thov tseem ceeb no. Tsis muaj qib stainless hlau tuaj yeem phim titanium kev sib xyaw ua ke ntawm seawater corrosion tiv thaiv thiab thermal stability.

Q4: Dab tsi ua rau muaj kev ntxhov siab corrosion tawg (SCC) hauv cov nroj tsuag desalination, thiab nws tiv thaiv li cas?

SCC hauv cov nroj tsuag desalination yog tshwm sim los ntawm kev sib xyaw ntawm: (1) tensile stress (los ntawm siab, fabrication residuals, los yog thermal cycling), (2) chloride ions nyob rau hauv cov txheej txheem kua, thiab (3) ib tug susceptible microstructure - feem ntau tag nrho austenitic stainless hlau saum toj no kwv yees li 60 degree. Cov tswv yim tiv thaiv muaj xws li: xaiv duplex stainless hlau (inherently SCC-resistant vim ferritic theem), siv titanium los yog npib tsib xee alloys rau siab-kub seawater / brine kev pab cuam, qhia post-weld stress nyem qhov twg siv, thiab tsis txhob siv qib siab tshaj nws SCC.saold{9}

Q5: Dab tsi yog qhov txawv ntawm 2205 thiab 2507 super duplex rau desalination?

2205 muaj PRE ntawm kwv yees li 35 thiab tawm lub zog ntawm 450-650 MPa. 2507 muaj PRE ntawm kwv yees li 42 thiab tawm lub zog ntawm 550-650 MPa. Hauv kev xyaum: 2205 yog tus qauv xaiv rau feem ntau ntawm cov kav dej hiav txwv hauv SWRO cov nroj tsuag; 2507 tau hloov kho mus rau qhov siab tshaj plaws - siab, siab tshaj - nrawm, lossis siab tshaj - cov khoom siv chloride - ERDs, HP twj tso kua mis sab hauv, thiab cov pa tawm cov pa tawm ntau. Tus nqi them nqi ntawm 2507 tshaj 2205 yog kwv yees li 50-80%.

Q6: Biofouling (MIC) cuam tshuam li cas rau kev xaiv khoom?

Microbiologically induced corrosion (MIC) tuaj yeem pib pitting hauv cov alloys uas yuav tiv taus abiotic chloride corrosion. Sulfate-txo cov kab mob (SRB) nyob rau hauv biofilms tsim hauv zos anaerobic, acidic tej yam kev mob uas yuav ua txhaum lub passive zaj duab xis ntawm txawm duplex stainless hlau. Cov tswv yim tswj xyuas muaj xws li: tswj kom txaus khiav ceev (ntau tshaj 1 m / s), chlorination los yog biocide dosing, xaiv siab dua -PRE alloys rau qis- nrawm tuag- ceg, thiab siv titanium los yog npib tsib xee alloys rau MIC feem ntau -.

Q7: Cov ntaub ntawv dab tsi yog siv rau RO siab hlab ntsha?

RO cov hlab ntsha siab (membrane vaj tse) feem ntau yog tsim los ntawm iav -cov yas siv zog (GRP) los yog filament- cov kab mob fiber ntau- cov khoom siv polymer (FRP). Cov ntaub ntawv tsis yog-cov khoom siv hlau no muab kev tiv thaiv zoo rau cov dej hiav txwv, tsis muaj kev pheej hmoo corrosion galvanic, thiab muaj zog dua li cov khoom siv hlau. Cov kaus mom kawg, tiv thaiv- cov khoom siv telescoping, thiab cov khoom sib txuas sib txuas feem ntau yog 316L stainless hlau, nrog 2205 lossis 2507 siv rau lub siab- siab pub manifolds thiab mloog zoo rau headers.

Q8: Puas yog galvanic corrosion muaj kev txhawj xeeb hauv cov nroj tsuag desalination?

Yog - dej hiav txwv yog cov khoom siv hluav taws xob zoo heev uas ua rau ob leeg sib txawv ntawm cov hlau tsis sib xws hauv kev sib cuag. Cov galvanic series hauv dej hiav txwv yuav tsum tau sab laj thaum twg cov hlau sib txawv los yog cov hlau sib txuas. Cov kev cai tseem ceeb: ib txwm cais cov titanium los ntawm cov hlau tsis muaj steel hauv cov kav dej (siv tsis yog -cov roj hmab gaskets thiab dielectric fittings); zam kev sib txuas cov pa roj carbon steel (muaj zog heev) rau stainless hlau (noble) yam tsis muaj kev tiv thaiv cathodic; thiab tsim- tawm ib qho bi-hloov kev sib cuag nyob rau hauv submerged los yog ntub ib puag ncig.

Siv daim ntawv txheeb xyuas no ua cov cuab yeej tshuaj ntsuam xyuas ua ntej ua tiav cov khoom siv tshwj xeeb rau cov khoom cog desalination.

Kauj ruam-los ntawm- Cov txheej txheem xaiv cov khoom:

Txhais ib puag ncig:Chloride concentration, kub, siab, pH, ntws tshaj tawm, lom lom, thiab muaj H₂S lossis CO₂.

xam qhov xav tau PRE:< 35 ppm Cl⁻: PRE > 25 acceptable. Seawater (< 35,000 ppm): PRE > 40 required. Concentrate streams: PRE > 42 recommended.

Txheeb xyuas qhov ntsuas kub:Tshaj 60℃nrog chlorides → tshem tawm austenitic SS; xaiv duplex, titanium, lossis nickel alloy. Tshaj 280℃→ tshem tawm duplex; siv titanium los yog nickel alloys.

Txheeb xyuas NACE MR0175 ua raws:Yuav tsum tau rau ib qho kwj nrog H₂S ib nrab siab> 0.0003 MPa (0.05 psi). Txheeb xyuas cov ntawv ua raws qib hauv ISO 15156-3.

Ntsuam xyuas kev tshaj tawm / erosion txaus ntshai:Tshaj 3 m / s hauv dej hiav txwv → qhia siab dua -PRE qib lossis titanium rau lub twj tso kua mis thiab lub valve sab hauv thiab tag nrho lub luj tshib.

Ntsuam xyuas MIC Risk:Tsawg- nrawm tuag- ceg ceg, ntu tsis tu ncua, thiab thaj chaw nyob ruaj khov → txhim kho PRE yam tsawg kawg 5 ntsiab lus lossis siv titanium / npib tsib xee alloys.

Txheeb xyuas galvanic compatibility:Txheeb xyuas tag nrho ob qho -metallic interfaces. Qhia kom muaj kev sib cais fittings qhov twg muaj peev xwm sib txawv> 250 mV hauv seawater galvanic series.

Ua ib qho kev ntsuam xyuas tus nqi lifecycle:Sib piv 25-xyoo tus nqi tag nrho (CAPEX + OPEX suav nrog kev saib xyuas, hloov pauv, thiab poob ntau lawm) rau 2-3 cov ntaub ntawv sib tw.

Txheeb xyuas cov khoom siv thiab kev tsim khoom:Paub meej tias muaj cov qib uas tau xaiv nyob rau hauv cov khoom xav tau, qhov ntau thiab tsawg, thiab qhov ntau. Txheeb xyuas qhov tsim nyog ntawm tus neeg tsim khoom hauv zos rau cov txheej txheem vuam.

Tau txais kev tshuaj xyuas corrosion engineering:Tag nrho cov khoom xaiv rau dej hiav txwv immersion los yog siab -kub brine kev pab cuam yuav tsum tau tshuaj xyuas los ntawm ib tug tsim nyog corrosion engineer ua ntej zaum kawg specification.

Kev xaiv cov khoom siv rau cov nroj tsuag dej hiav txwv desalination yog ib qho kev qhuab qhia uas muab nqi zog rau kev xav, cov ntaub ntawv -tsav kev tsom xam, thiab lub sijhawm ntev - kev xav. Cov ntaub ntawv muaj hnub no - los ntawm 2205 duplex stainless hlau mus txog rau titanium thiab npib tsib xee alloys - muab cov kev daws teeb meem tiav rau txhua ntu ntawm txhua lub tshuab desalination. Qhov tseem ceeb yog txuam cov khoom siv rau qhov kev pabcuam raug cai.

Tus qauv yog qhov tseeb: kev hloov kho cov khoom tshwj xeeb ntawm cov qauv tsim yog yuav luag pheej yig dua li hloov cov khoom ua tsis tau zoo tom qab cov nroj tsuag tau commissioned. Ib qib uas raug nqi ob zaug ntau dua ib kilogram tab sis kav peb zaug ntev dua, ntawm ib qho -quarter ntawm tus nqi saib xyuas, yeej ib txwm yog qhov kev xaiv nyiaj txiag zoo dua. Qhov kev sib tw yog kev sib txuas lus qhov no kom meej rau cov neeg muaj feem cuam tshuam txog kev tsom mus rau kev txo qis thawj CAPEX.

Phau ntawv qhia no muab lub hauv paus rau kev ua cov lus sib cav nrog kev ntseeg siab. Cov ntaub ntawv yog unambiguous:nyob rau hauv seawater desalination, cov khoom siv specification tsis yog tus nqi - nws yog qhov tseem ceeb tshaj plaws kev nqis peev uas tus tsim qauv cog tuaj yeem ua.

Kev Siv & Cov Qauv

ASTM A312 / A790 / A 240 - Cov Lus Qhia Tshwj Xeeb rau Stainless Hlau Yeeb Nkab, Phaj thiab Ntawv

ASTM B338 - Txuj Specification rau Seamless thiab Welded Titanium thiab Titanium Alloy Tubes

ASTM B443 / B575 / B574 - Nickel Alloy Phaj, Sheet, thiab Yeeb Nkab (Alloy 625 / C-276)

NACE MR0175 / ISO 15156 - Cov ntaub ntawv siv rau hauv H₂S- Muaj ib puag ncig hauv roj thiab roj ntau lawm

NACE SP0108 - Corrosion Control of Offshore Structures los ntawm Cov Txheej Txheem Tiv Thaiv

NACE SP0169 - Kev Tswj Xyuas Sab Nraud Corrosion nyob rau hauv av lossis Submerged Metallic Piping Systems

ASME B31.3 - Txheej Txheem Piping Design Code

ASME Boiler & Pressure Vessel Code, Tshooj VIII

Outokumpu Corrosion Handbook, 11th Edition

IDA (International Desalination Association) - Desalination Yearbook 2024–2025

LEEJ TWG - Cov Lus Qhia rau Kev Haus Dej- Dej Zoo, 4th Edition (2017, hloov kho 2022)

ASM International - ASM Phau Ntawv, Volume 13B: Corrosion: Materials

Tshwj xeeb Metals Corporation - Cov Ntawv Qhia Txog Kev Tshawb Fawb rau Alloy 625 thiab C-276

TEMA Standards for Heat Exchanger Design

Titanium Information Group - Titanium nyob rau hauv Desalination: Technical Guide Note TIG No. 12

Cov ntaub ntawv no yog tsim los ntawm cov kws tshaj lij kev lag luam hlau rau cov ntaub ntawv thiab siv lub hom phiaj nkaus xwb.

Ib txwm koom nrog tus kws tshaj lij kev tsim hluav taws xob tsim nyog thiab siv cov qauv siv tam sim no ua ntej ua tiav cov khoom xaiv rau txhua qhov kev cog qoob loo desalination.