ASTM A790 UNS S32750 yog ib qho kev qhia tshwj xeeb rau superduplex stainless hlau welded yeeb nkab, tshwj xeeb uas tsim los rau kev kub siab thiab qhov chaw muaj corrosive heev. GNEE tuav cov khoom lag luam loj ntawm S32750 cov kav dej thiab muaj kev hloov pauv ntau nrog kev xa khoom sai, muab ib qho kev daws teeb meem rau lub zog siab, siab corrosion kuj thiab siab ruaj khov super duplex welded yeeb nkab tshuab, siv hauv kev thov kev lag luam.
Peb ASTM A790 UNS S32750 welded kav yog tsim los ntawm precision yob txoj kev ua ke nrog ntshav welding thiab ob-sided TIG vuam. Cov kav dej yog cov tshuaj annealed ntawm 1050-1100 degrees kom tshem tawm cov kev ntxhov siab welding thiab cov nag lossis daus. Lub weld yog du thiab uniform, tsis muaj slag inclusions thiab porosity. Hardness yog tswj ntawm tsawg dua los yog sib npaug rau 310 HBW, thaum zoo kub tsis tshua muaj kev cuam tshuam toughness yog tswj ntawm -46 degree. Piv rau 316L stainless hlau thiab cov pa 2205 duplex steel, S32750 welded yeeb nkab muaj peev xwm ua kom muaj zog ntau dua, tso cai rau cov khoom siv slimmer tsim thiab txo cov khoom siv tag nrho.
Loj txoj kab uas hla S32750 Welded yeeb nkab
S32750 welded yeeb nkab withstands kev pab kub mus txog 315 degrees thiab muaj ib tug tseem ceeb pitting kub (CPT) ntawm ntau tshaj los yog sib npaug rau 50 degrees. Nyob rau hauv dej hiav txwv corrosion tej yam kev mob thiab nyob rau hauv acidic los yog alkaline xov xwm nrog cov ntsiab lus chloride siab, nws lub neej muaj txiaj ntsig yog ntau dua 8 npaug ntev dua li ntawm 316L stainless hlau. Cov kav dej no tau siv dav hauv cov chaw lag luam hauv ntug dej hiav txwv, dej hiav txwv desalination nroj tsuag, flue gas desulphurization (FGD) systems, siab hlab ntsha rau cov tshuaj lom neeg kev lag luam thiab kub exchangers.
GNEE muab tag nrho loj ASTM A790 UNS S32750 welded kav nrog sab nraud diameters ntawm 12.7mm mus rau 325mm thiab phab ntsa thicknesses ntawm 1.2mm mus rau 20mm. Customized tsau ntev ntawm 6 mus rau 12 meters, tsis yog-tus qauv txiav, bevel machining, thiab deg pickling thiab passivation kev kho mob muaj. Sab nraud txoj kab uas hla yog tswj nruj me ntsis hauv ± 0.15mm.
ASTM A790 UNS S32750 Specifications
| Yam khoom | Specification |
|---|---|
| Kev cai | ASTM, AISI, EN, GB, DIN, JIS, ASME |
| Sab nraud txoj kab uas hla seamless raj S32750 | Los ntawm 6.00 hli mus rau 250 hli, qhov ntau thiab tsawg mus txog DN 12 nti |
| Welded raj loj S32750 | 5.0mm txog 1219.2mm |
| EFW tube loj S32750 | 5.0mm txog 1219.2mm |
| phab ntsa thickness | 0.3mm txog 50mm |
| ASTM A790 S32750 welded raj ntau thiab tsawg | Sab nraud txoj kab uas hla 6.35 hli mus txog 152 hli |
| SWG/BWG Gauges | 10, 12, 14, 16, 18, 20 SWB |
| Cov yeeb nkab phab ntsa thickness S32750 | 0.020 nti - 0.220 nti (qhov tshwj xeeb thicknesses muaj) |
| ASTM A790 S32750 Pipe Teem caij Gauges | 5, 10, 40, 80, 80S, 160, XXS, XS |
| Cov yeeb nkab nto tiav S32750 | NO.1, Polished, 2B, Annealed thiab pickled, Bright annealed, MF, NO.4, BA, HL, 8K, daim iav tiav, thiab lwm yam. |
Tshuaj muaj pes tsawg leeg ntawm Superduplex yeeb nkab 2507 (% los ntawm qhov hnyav)
| Qib | C Tsawg dua los yog sib npaug | Mn Tsawg dua lossis sib npaug | P Tsawg dua lossis sib npaug | S Tsawg dua los yog sib npaug | Yog Tsawg dua los yog sib npaug | Tsis yog | Cr | mo | N | Cu |
|---|---|---|---|---|---|---|---|---|---|---|
| S32750 | 0.03 ib | 1.20 | 0.035 ib | 0.02 ib | 0.80 ib | 6.0-8.0 Nws | 24.0-26.0 Nws | 3.0-5.0 | 0.24-0.32 Nws | 0.5 |
Mechanical Properties ntawm S32750 Superduplex Pipe
| Mechanical Properties | Min tensile zog ksi [MPa] | Min yield zog ksi [MPa] | Elongation% (min) | Hardness HB (max) |
|---|---|---|---|---|
| S32750 | 116 [800] | 80 [550] | 15 | 300 |
ASTM A790 Yeeb Nkab Tolerances
Outer Diameter kam rau ua (OD)
| OD Tolerance | Sab Nraud Qhov Loj D (mm) |
|---|---|
| +0,40 / -0.80 | 11.3 Tsawg dua lossis sib npaug D Tsawg dua lossis sib npaug rau 48.3 |
| +0,80 / -0.80 | 48.3 |
| +1,60 / -0.80 | 114.3 |
| +2,40 / -0.80 | 219.1 |
Phab ntsa Thickness kam rau ua (WT)
| Txoj kab uas hla D (mm) | Phab ntsa Thickness kam rau ua |
|---|---|
| 11.3 Tsawg dua lossis sib npaug rau D Tsawg dua lossis sib npaug rau 73 | +20% / -12.5% |
| 88.9 Tsawg dua lossis sib npaug rau D Tsawg dua lossis sib npaug rau 457 | +22,5% / -12.5% |
| 88.9 Tsawg dua lossis sib npaug rau D Tsawg dua lossis sib npaug rau 457 | +15% / -12.5% |
Dab tsi yog qhov txawv ntawm S32750 thiab S32760 welded kav?
S32750 stainless hlau yog lub hom phiaj dav dav superduplex hlau, haum rau nruab nrab aggressive chloride ib puag ncig xws li offshore platforms, desalination nroj tsuag thiab cov hlab ntsha siab rau kev lag luam tshuaj.
S32760 stainless hlau, muaj tooj liab thiab tungsten, muaj kev tiv thaiv ntau dua thiab tsim nyog rau ntau qhov chaw huab cua, xws li cov uas muaj sulfuric acid, flue gas desulfurization (FGD) systems, thiab subsea twj thiab li qub.
Dab tsi yog qhov txawv ntawm ASTM A790 thiab A789?
ASTM A790 feem ntau yog tsim los rau cov kav dej nominal, feem ntau yog siv rau kev thauj mus los ntawm cov kua dej, nrog rau qhov tseem ceeb ntawm lub siab nominal thiab cov qauv yeeb nkab loj (xws li Sch 10S, Sch 40S). ASTM A789 yog tsim los rau tshwj xeeb lub hom phiaj tubing / tshav kub exchanger tubing, feem ntau siv nyob rau hauv lub tshav kub exchangers thiab instrumentation piping, nrog rau qhov tseem ceeb ntawm sab nraud txoj kab uas hla (OD) thiab phab ntsa thickness (EP) raug.
Kev siv tseem ceeb ntawm S32750 Stainless Hlau Welded Pipes
Seawater desalination (cov kav dej siab hauv qhov rov qab osmosis)
Offshore roj thiab roj kev tsim kho (pipelines thiab subsea risers)
Kev lag luam tshuaj lom neeg (ib puag ncig nrog cov organic acids thiab chlorides)
Pulp thiab ntawv kev lag luam (bleaching systems)
Yog tias koj xav tau ib qho ntawm cov khoom hais, koj tuaj yeem tos txais koj qhov kev txiav txim. GNEE muaj cov khoom muag loj ntawm cov khoom hauv kev xav tau siab. Cov ntaub ntawv no muaj ob leeg seamless thiab welded; Yog xav paub ntxiv txog nws cov tshuaj muaj pes tsawg leeg lossis kuaj dawb, thov hu rau peb lub Hoobkas tam sim. Peb muab cov nqi sib tw thiab kev pabcuam tshwj xeeb.
Ua ntej ua zaub mov xa tuaj, txhua lub raj yuav raug kuaj xyuas tam sim no thiab ultrasonic tsis zoo, nrog rau kev ntsuas 100% hydrostatic siab. Nrog rau 99.8% cov khoom kawg dhau tus nqi, peb tuaj yeem muab EN 10204 3.2 daim ntawv pov thawj cov ntaub ntawv, nrog rau cov ntaub ntawv pov thawj thib peb metallographic thiab ntsev tshuaj ntsuam xyuas.
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