ASTM B677yog tus qauv kev tshwj xeeb rau"UN tsis muaj N08904, N08354, N08925, N19233, thiab N08926 Seamless Yeeb Nkab".
Cov qauv no suav nrog cov khaub thuas uas tsis muaj dab tsi los ntawm cov kav dej tsis zoo, tshwj xeeb yog qhov tshwj xeeb hauv cov xaim hluav taws xob muaj cov tshuaj chloride.
Tus Kakaw Kakaway yog tias B677 txhais cov tshuaj, kev siv tshuab, thiab qhov chaw nyob sab nraud, rau cov kav dej ua los ntawm cov alloys.
Cov kws tshaj lij
7x24 teev khoom xa tuaj
Cov Khoom Siv Tshuaj Txheem & Cov Khoom Siv Cov Tshuab
Piv ntawm peb alloys
Tag nrho peb cov alloys (N08925, N08354, N08926) yog ib feem ntawm lub "super {{ Lawv yog txhua tus zoo dua li ntawm cov qauv 316L stainless hlau.
Ntawm no yog cov ncauj lus piav qhia:
| Yam zoo | Uns uns n08926 (Alloy 926 / 1.4529) | Uns unic n08354 (Alloy 31 / 1.4562) | UN tsis yog N08925 (Alloy 925) |
|---|---|---|---|
| Lub Npe | Alloy 926, 1.4529 | Alloy 31, 1.4562 | Alloy 925 |
| Qhov tseem ceeb muaj pes tsawg leeg | ~ 25% ni, 20% cr,6.5% mo, ~ 0.8% Cu,0.18% N | ~ 27% ni, 20.5% cr,6.5% mo, 1.5% CU,0.22% N | ~ 25% ni, 21% cr,4.5% mo, 1.8% CU,0.01% n (max) |
| Tus loj li txiv plig | ~46 | ~49 | ~37 |
| Cov yam ntxwv tseem ceeb | Zoo heev txhua - ib ncig mus rau chlorides, acids, thiab dej hiav txwv. Muaj zog los ntawm nitrogen. | Siab tshaj pren ntawm peb.Zoo tshaj qhov pitting / Crevice corrosion, thiab muaj zog heev rau cov sulfuric acid. | Age -} tawv.Zoo corrosion kuj, tab sis nws qhov txiaj ntsig tseem ceeb yogSiab Zog. |
| Thawj kom tau txais | Kev ua tau zoo rau ntau yam ntawm cov kab mob ntawm cov kab mob. | Qhov siab tshaj plaws mus rau hauv zos corrosion (pitting / Crevice) hauv cov chloride ib puag ncig. | High Txhua Yam Zog(Yij Lub Zog> 100 Ksi / 690 MPa tom qab kev laus). |
| Cov Kev Siv Cov Ntawv Siv | Dej hiav txwv, Offshore platforms, Flue Gas Desulfurization, cov khoom siv tshuaj lom neeg. | Kev ua tshuaj lom neeg (tshwj xeeb tshaj yog cov sulfuric & phosphoric acid), dej txias dej txias, txhoj puab heev pulp & zeb ib puag ncig. | Downhole roj & roj tshuab (tubing, hangers, siab {}} Lub zog rasteners, lub zog} Lub zog thiab corrosion tsis tau muaj ob leeg xav tau. |
Cov khoom tseem ceeb thiab cov ntawv thov
1. Corrosion Kuj:
Zoo PITITER & CREVICE Corrosion Kuj:Lub siab molybdenum (mo) thiab nitrogen (n) cov ntsiab lus muab cov alloys ib tug heevPitting tiv thaiv tus lej sib npaug (pren).
Pren =% cr + 3.3 x (% mo)+ 16 x (% n)
Kuj rau Chlorides:Lawv yog deb tiv taus chloride to chloride - indive kev nyuaj siab corrosion (SCC) dua li tus qauv 304/316 stainless hlau.
GENERAL Corrosion:Kev tiv thaiv zoo heev rau ntau cov acids, suav nrog cov sulfuric, phosphoric, thiab cov organic acids.
2. Cov khoom siv kho tshuab (rau ASTM B677):
Tus qauv qhia yam tsawg kawg cov khoom siv yam tsawg kawg rau cov yeeb nkab hauv kev ua haujlwm tsis muaj tseeb. Cov nqi raug yog:
Lub zog tensile:94 - 110 ksi (650 - 760 mpa)
Tos lub zog (0.2% offset):45 - 65 ksi (310 - 450 mpa)
Elongation:35% yam tsawg kawg (hauv 2 nti / 50 hli)
* (CEEB TOOM: ALLOY N08925 feem ntau muab rau hauv kev daws -}}}}}}} Lub zog siab dua lub zog, uas yog nws lub hom phiaj tseem ceeb.) *
3. Cov Kev Siv Cov Khoom Siv Ntau Yam:
Tshuaj lom neeg & petrochemical ua:Reactors, kev sib pauv hluav taws xob, piping rau kev siv tshuaj lom neeg.
Roj & Roj:Downhole tubing, Whighthead Cheebtsam, ntws cov kab, tshwj xeeb tshaj yog hauv kev pab qaub (h₂s muaj) ib puag ncig.
Tubrog nkoj & Davehore:Dej hiav txwv piping tshuab, kev pauv hluav taws xob kub, ballast tshuab.
Vienution Control:Flue Gas Desulfurization (FGD) lub tshuab, hloov pauv, thiab ducting.
Pulp & Daim Ntawv Kev Lag Luam:Digesters, cov nroj tsuag ua kom dawb.
Cim npe nrov: ASTM B677 UN tsis muaj N08925 / N08354 / n08926 smls yeeb nkab, Tuam Tshoj Astm B677254 / N08926 SMLS Yeeb Nkab Cov Chaw Tsim Tshuaj, Chaw muag khoom, Hoobkas
