Vim li cas Aluminium Brass Tubes siv hauv Seawater Exchangers
ASTM B111 C68700 aluminium brass seamless tubes yog txias -copper-zinc hlab uas muaj 1.8 mus rau 2.5% txhuas nrog ib tug me me arsenic ntxiv. Cov txhuas ua cov yeeb yaj kiab tiv thaiv uas tiv thaiv kev txav dej hiav txwv, uas yog vim li cas qib tau dhau los ua cov khoom siv hauv lub raj rau saum npoo condensers, evaporators thiab cua kub exchangers nyob rau hauv lub hwj chim noj, refineries thiab desalination nroj tsuag. Lub raj yog them los ntawm ASTM B111 rau txoj kab uas hla mus txog 3 1/8 hauv (80 mm) thiab raug xaj thoob ntiaj teb raws li HAL77-2, CZ110, C6870 lossis CuZn20Al2.
Piv nrog rau admiralty tooj dag, aluminium brass tolerates siab dua cov dej tshaj tawm thiab cov dej txias txias, qhov sib txawv uas ncaj qha ncua lub sij hawm ntawm cov pob retubing.
Chemistry thiab qib sib npaug
| Element | Kev xav tau,% |
|---|---|
| Cu | 76.0 - 79.0 |
| Al | 1.8 - 2.5 |
| Raws li | 0.02 - 0.06 |
| Fe | 0.06 max |
| Pb | 0.07 max |
| Zn | Tseem tshuav |
| Txuj | Cov npe sib raug |
|---|---|
| ASTM B111 | C68700 |
| GB/T 8890 | HLO 77-2 |
| SIB 2871 | CZ110 |
| JIS H3300 | C6870 |
| TIAB SA 1785 | CuZn20Al2 |
Aluminium ntau yam yog tus tswj daim duab. Cov txhuas me dhau ua rau cov yeeb yaj kiab tiv thaiv tsis muaj zog thiab lub raj xa rov qab mus rau tus cwj pwm zoo tib yam hauv dej hiav txwv; aluminium ntau dhau ua rau kub ua haujlwm thiab teeb duab nyuaj, yog li lub qhov rais 1.8 txog 2.5% yog tuav nruj hauv kev tsim khoom.
Mechanical Properties thiab Temper
| Khoom | Tus nqi |
|---|---|
| Kub | O61 ua tsaug |
| Tensile zog, min. | 50 ksi / 345 MPa |
| Yield zog, min. | 18 ksi / 125 MPa |
Lub annealed temper muab qhov tsawg kawg nkaus tawm lub zog ntawm 125 MPa. Qib ntawd yog siab txaus los tiv thaiv lub cev qhuav dej thaum dov rau hauv cov ntawv raj thiab qis txaus kom tso cai rau lub raj kawg kom nthuav dav yam tsis muaj qhov tawg, uas yog qhov sib npaug ntawm cov khoom siv condenser.
Size Range thiab Manufacturing Route
| Yam khoom | Ntau yam |
|---|---|
| Tsim | Seamless, txias kos |
| Sab nraud txoj kab uas hla | 5mm txog 80mm, mus txog 3 1/8 nyob rau hauv |
| Phab ntsa thickness | 0.5mm txog 12.7mm |
| Ntev | 6 m los yog ntev |
| Xaus | Plain, bevelled los yog threaded |
Tubes yog kub los yog txias ua hauj lwm kom tiav loj thiab ces annealed kom tau raws li lub temper. Ncaj, trimming thiab deg tu raws li, thiab cov raj feem ntau yog varnished rau kev tiv thaiv kev thauj mus los. Txoj kab uas hla txoj kab uas hla yuav txo qis thaum lub raj me me:
| Sab nraud txoj kab uas hla, mm | Txoj kab uas hla kam rau ua, ntxiv thiab rho tawm, mm |
|---|---|
| Mus txog 12 | 0.064 - 0.076 |
| Tshaj 12 txog 18 | 0.076 - 0.10 |
| Tshaj 18 txog 25 | 0.10 - 0.15 |
| Tshaj 25 rau 35 | 0.13 - 0.20 |
| Tshaj 35 txog 50 | 0.15 |
| Ntau tshaj 50 rau 80 | 0.17 |
Eddy-current test: applied to every tube to detect wall defects, with hydrostatic or pneumatic testing available as the specified alternative.
Flattening test: cov qauv raug tshuaj xyuas rau cov qauv kev sib tw flattening thiab thaj chaw flattened yuav tsum tsis muaj qhov tsis xws luag uas yuav cuam tshuam rau daim ntawv thov.
Kev tswj cov qoob loo loj: cov qauv annealed raug kuaj xyuas kom cov raj xaus dov thiab khoov rau hauv thaj teb.
Kev ua haujlwm: roundness, straightness thiab phab ntsa uniformity yuav tsum haum rau daim ntawv thov, thiab txiav xaus yog deburred.
Kev kos npe thiab ntim khoom: tus qauv, qib, qhov loj, tus naj npawb cua sov thiab ntau tus lej raug cim rau ntawm lub raj, thiab cov pob khoom tau muab rau hauv hexagonal bundles, ntoo thawv lossis hlau thiab ntoo crates.
Daim ntawv thov thiab Alloy xaiv
Aluminium tooj dag raj yog siv nyob rau hauv qhov chaw condensers, evaporators, coolers thiab tshav kub exchangers nyob rau hauv lub hwj chim tiam, refineries thiab tshuaj nroj tsuag, nyob rau hauv desalination thiab distillation tsheb ciav hlau, thiab nyob rau hauv shipboard seawater systems. Nws cov aluminium-nplua nuj zaj duab xis tiv taus kev txav mus los thiab dej aerated zoo dua li cov tooj liab dawb dawb. Qhov twg cov tshuaj chloride siab heev, qhov twg cov dej nqa cov xuab zeb nkag los yog qhov twg lub raj yuav tsum tiv thaiv ammonia -cov kabmob condensate, tooj liab-nickel C70600 lossis C71500 yog qhov kev xaiv muaj zog, ntawm tus nqi siab dua thiab qis dua thermal conductivity.
FAQ
Q: ASTM B111 C68700 txhuas tooj dag yog dab tsi?
Nws yog seamless txias- kos tooj dag raj muaj 76.0 txog 79.0% tooj liab, 1.8 txog 2.5% txhuas thiab 0.02 mus rau 0.06% arsenic, siv feem ntau hauv seawater condensers, evaporators thiab tshav kub exchangers.
Q: Nws txawv li cas ntawm admiralty tooj dag C44300?
C68700 tso siab rau aluminium es tsis txhob tin rau nws cov yeeb yaj kiab tiv thaiv, muab kev tiv thaiv zoo dua rau cov dej hiav txwv sai dua thiab ntau dua aerated, thaum C44300 yog siv rau hauv cov dej tshiab thiab tsis tshua muaj - nrawm nrawm.
Q: Qhov ntau thiab tsawg ntawm aluminium tooj dag raj muaj?
Seamless raj khiav ntawm 5 hli mus rau 80 hli sab nraud txoj kab uas hla, sib npaug li ntawm 3 1/8 nyob rau hauv, nrog 0.5 hli mus rau 12.7 hli phab ntsa thiab 6 m txheem ntev.
Q: Dab tsi yog qhov tsawg kawg nkaus txhua yam khoom nyob rau hauv annealed temper?
Lub O61 annealed temper muab lub zog tensile yam tsawg kawg nkaus ntawm 345 MPa (50 ksi) thiab qhov tsawg kawg nkaus yield zog ntawm 125 MPa (18 ksi).
Q: Vim li cas arsenic ntxiv rau cov hlau no?
Arsenic ua raws li tus inhibitor tiv thaiv dezincification, tiv thaiv zinc - theem nplua nuj kom cov txhuas zaj duab xis tuaj yeem ua nws txoj haujlwm ntawm dej sab ntawm lub raj.
