1: Cu PCH tooj liab yog dab tsi, thiab nws cov yam ntxwv tseem ceeb ua rau nws txawv ntawm lwm hom tooj liab uas siv hauv tubing?
Cu PCH yog ISO- tshwj xeeb tsim rau tooj liab alloy feem ntau hu ua C12200 lossis DHP (Phosphorus Deoxidized Copper, High Residual Phosphorus). Nws cov yam ntxwv txhais yog nws cov muaj pes tsawg leeg: tsawg kawg ntawm 99.9% tooj liab nrog rau kev txhob txwm tshaj tawm ntawm 0.015% rau 0.040% phosphorus.
Qhov sib txawv tseem ceeb nyob hauv lub luag haujlwm ntawm phosphorus ua deoxidizer. Thaum lub sij hawm melting thiab casting ntawm ntshiab tooj liab (CW024A / C10200), oxygen tuaj yeem yaj rau hauv cov yaj. Thaum solidification, cov pa oxygen no tuaj yeem ua ke nrog hydrogen (los ntawm cov txheej txheem tom ntej lossis ib puag ncig kev pabcuam) los ua kom siab -siab cov hnab ris hauv cov hlau, ua rau embrittlement thiab cracking-ib qho tshwm sim hu ua "hydrogen embrittlement." The phosphorus in Cu PCH alloys with this residual oxygen, forming harmless phosphorus oxides that are removed or dispersed, resulting in a denser, more homogeneous, and gas-free microstructure.
Qhov no ua rau Cu PCH sib txawv los ntawm:
Electrolytic Tough Pitch Copper (CW024A / C11000): Muaj cov pa oxygen thiab muaj kev cuam tshuam rau hydrogen embrittlement, ua rau nws tsis haum rau siab - kub, txo cov huab cua (xws li, hauv cov rooj sib tham brazed lossis qee cov roj roj).
Oxygen-Free Copper (CW009A / C10200): Tau oxygen tshem tawm los ntawm cov txheej txheem sib txawv (carbon monoxide), kim dua, thiab nyiam dua rau siab - lub tshuab nqus tsev hluav taws xob lossis cov huab cua txo qis heev uas txawm tias phosphorus yog cov kab mob.
2: Vim li cas Cu PCH universally suav tias yog cov khoom siv "workhorse" rau capillary solder thiab brazed pob qij txha hauv cov kav dej, cua sov, thiab tub yees?
Cu PCH qhov tseem ceeb hauv cov ntawv thov no yog vim muaj kev sib raug zoo ntawm nws cov khoom nrog cov kev cai ntawm kev sib koom ua ke.
Zoo Capillary Flow rau Kev Koom Tes: Nws tsis yog - oxidizing tus yam ntxwv (vim phosphorus) ua kom lub ntsej muag huv si, ruaj khov thaum cua sov. Thaum ua ke nrog flux hauv soldering (rau cov kav dej) lossis thaum siv tus kheej -fluxing phosphorus- bearing brazing alloys (xws li BCuP series hauv tub yees), cov molten muab tub lim hlau nthuav tawm tshwj xeeb ntub dej thiab ua haujlwm capillary. Qhov no rub lub filler tob rau hauv kev sib koom ua ke, tsim kom muaj zog, sib xws, thiab xau- pov thawj fillet.
Resistance to Embrittlement Thaum Kev Pabcuam: Cov pob qij txha yog tsim los ntawm kev siv cov cua sov hauv zos. Cu PCH muaj kev tiv thaiv rau cov hydrogen embrittlement uas tuaj yeem ua rau muaj pa oxygen- bearing tooj liab thaum rhuab nyob rau hauv cov nplaim taws txo qhov chaw, lav kev sib koom ua ke ntau xyoo lawm.
Superb Formability thiab Compatibility: Nyob rau hauv nws lub xeev annealed, Cu PCH yog ductile heev, cia cov hlab yuav khoov thiab flared tsis muaj cracking. Nws kuj tseem ua tau zoo nrog cov qauv fittings, li qub, thiab cov khoom siv thoob plaws HVACR thiab cov kav dej hauv kev lag luam.
Hauv qhov tseem ceeb, Cu PCH muab qhov zoo tshaj plaws sib npaug ntawm kev sib koom ua ke, kev cia siab ntev -lub sij hawm, thiab tus nqi- kev ua tau zoo rau ntau lab ntawm cov pob qij txha capillary ua txhua xyoo hauv kev tsim kho thiab kev tsim khoom.
3: Rau cov tub yees tseem ceeb thiab huab cua - cov ntawv thov txias, Cu PCH raj feem ntau muab rau ASTM B280 tus qauv. Dab tsi tshwj xeeb ntxiv kev ua haujlwm thiab kev tswj hwm zoo li cas qhov no suav nrog, thiab vim li cas lawv tsis yog - sib tham tau?
ASTM B280, "Standard Specification for Seamless Copper Tube for Air Conditioning and Refrigeration Field Service," txhais cov qib hwm ntawm Cu PCH raj. Lub kaw lus rhiab heev rau kev sib kis ua rau cov kauj ruam ntxiv tseem ceeb heev.
Ntxuav thiab Degreasing: Lub raj sab hauv yog ua kom huv si kom tshem tawm tag nrho cov roj, cov khoom sib txuas, thiab cov khoom seem. Txhua qhov seem tuaj yeem ncig, txhaws cov khoom siv ntxiv, lossis txo cov roj compressor.
Lub cev qhuav dej (Baking): Cov hlab yog ci hauv qhov cub tswj kom tshem tawm cov dej noo absorbed mus rau hauv microscopic tooj liab oxide txheej ntawm sab hauv. Dej yog tus yeeb ncuab hauv lub tub yees; nws tuaj yeem khov ntawm qhov nthuav dav thiab, qhov tseem ceeb tshaj, hnov mob nrog cov tub yees thiab roj los tsim cov kua qaub corrosive.
Nitrogen Purging thiab Sealing: Tam sim ntawd tom qab lub cev qhuav dej, cov hlab yog purged nrog qhuav, oxygen-dawb nitrogen thiab hermetically kaw nrog yas hau ntawm ob sab. Qhov "them" no tiv thaiv re-oxidation thiab noo noo ingress thaum khaws cia thiab thauj. Cov kws kho mob tau cob qhia kom cov raj kaw kom txog thaum lub sijhawm teeb tsa.
Kev Ntsuas Siab nruj: Txhua qhov ntev yuav raug siab dua -siab hydrostatic los yog pneumatic sim kom ntseeg tau tias muaj kev ncaj ncees.
Kev siv tsis yog -AB280 tube hauv lub tub yees system muaj kev pheej hmoo qhia txog cov laj thawj tseem ceeb ntawm lub cev tsis ua haujlwm ntxov: kev sib kis, corrosion, thiab ya raws -induced acid tsim.
4: Cov ntsiab lus phosphorus hauv Cu PCH cuam tshuam li cas rau nws qhov tsim nyog rau vuam piv rau brazing, thiab dab tsi yog txoj kev nyiam sib koom rau siab - daim ntawv thov kev ncaj ncees?
Cov ntsiab lus phosphorus yog ob -edged ntaj nyob rau hauv cov nqe lus ntawm kev koom, dictating txoj kev nyiam.
Rau Brazing thiab Soldering: Zoo tagnrho. Raws li tau sau tseg, phosphorus muaj txiaj ntsig zoo. Rau siab -lub zog, siab - kub brazed pob qij txha (ntau nyob rau hauv cov khoom siv hluav taws xob sib hloov), phosphorus- muaj cov hlau muab tub lim (xws li BCuP-3 nrog ~ 5% Ag) feem ntau siv. Cov phosphorus ua raws li tus neeg sawv cev fluxing, txo cov oxides saum npoo thiab txhawb kev sib cog lus zoo. Qhov no yog thawj thiab feem ntau pom zoo koom nrog rau Cu PCH cov rooj sib txoos.
Rau Fusion Vuam (piv txwv li, TIG/GTAW): Teeb meem. Fusion welding melts lub hauv paus hlau. Cov phosphorus residual nyob rau hauv Cu PCH tuaj yeem cais tawm thaum lub sij hawm solidification ntawm lub pas dej ua ke, tsim qis -melting-point, nkig theem (tooj liab phosphides) raws li cov ciam teb. Qhov no txo cov ductility thiab tawg toughness ntawm weld, ua rau nws yooj yim rau tawg nyob rau hauv kev co los yog thermal cycling. Yog li, Cu PCH feem ntau tsis pom zoo rau qhov tseem ceeb fusion-welded qauv.
Nyiam Siab -Txoj Kev Ncaj Ncees:
Capillary Brazing nrog Nyiaj - Phosphorus Fillers: Tus qauv rau cov tub yees thiab hydraulic kab.
Kev sib txhuam Vuam / Orbital Vuam (nrog kev saib xyuas): Rau kev siv vuam vuam, ua tib zoo tswj qhov ntsuas thiab qee zaum hloov mus rau cov pa oxygen-cov hlau tsis pub dawb tuaj yeem txo cov teeb meem, tab sis xaiv cov khoom yuav tsum tau tshuaj xyuas ua ntej.
Mechanical Joining: Rau kev kho vaj tse lossis kev sib dhos tshwj xeeb, precision- tsim flare lossis nias- txuas fittings muab kev ntseeg tau, weld- cov pob qij txha dawb.
5: Nyob rau hauv loj -tej kev lag luam thiab kev lag luam tej yaam num, dab tsi yog yam tseem ceeb uas tus engineer los yog specifier yuav tsum tau soj ntsuam thaum xaiv ntawm hom K, L, thiab M Cu PCH raj?
Kev xaiv ntawm Hom K, L, thiab M yog qhov kev txiav txim siab hauv engineering raws li cov kev xav tau siab, kev ua raws cai, thiab kev ua kom zoo dua tus nqi. Tag nrho peb tuaj yeem ua los ntawm Cu PCH alloy (C12200), qhov sib txawv ntawm phab ntsa tuab (thiab yog li, sab nraud txoj kab uas hla rau tib lub npe loj).
Hom K: Muaj phab ntsa tuab tshaj plaws rau qhov muab nominal txoj kab uas hla. Nws yog siv rau qhov siab tshaj - daim ntawv thov siab, kev faus av hauv av (vim muaj kev tiv thaiv zoo rau sab nrauv corrosion thiab tuav kev puas tsuaj), thiab hauv kev tiv thaiv hluav taws. Nws yog hom uas muaj zog thiab kim tshaj plaws.
Hom L: Muaj cov phab ntsa nruab nrab tuab. Qhov no yog hom kev siv ntau tshaj plaws thiab ntau yam siv hauv kev lag luam thiab cov kav dej hauv tsev rau ob qho tib si dej kub thiab dej txias, HVAC hydronic (cua sov / dej txias) tshuab, thiab cov txheej txheem kev pabcuam tub yees. Nws muaj qhov sib npaug zoo ntawm lub zog, qhov ntsuas siab, khoov tau, thiab tus nqi.
Hom M: Muaj phab ntsa thinnest. Nws yog qhov tsim nyog rau qis- siab, qis- cov ntawv siv nyiaj xws li kev faib dej txias hauv tsev hauv ib lub tsev (qhov tso cai los ntawm cov cai hauv zos), cov kab ntws, thiab qee qhov hluav taws xob cua sov. Nws siv feem ntau txwv los ntawm txoj cai nyob rau hauv siab - cov tsev nce siab lossis rau cov kab roj.
Yam Tseem Ceeb Kev Ntsuas:
Cov Cai Tswjfwm: Cov kav dej hauv zos (piv txwv li, IPC, UPC hauv Teb Chaws Asmeskas) thiab cov lej siv tshuab tau qhia meej meej txog cov raj tso cai rau cov kev pabcuam sib txawv (dej haus, roj, roj kho mob, thiab lwm yam).
System Pressure & Temperature: Tus engineer xam qhov ntsuas qhov ntsuas qhov xav tau, suav nrog kev nyab xeeb margins. Phab ntsa Thicker (Hom K, L) tswj cov kev kub ntxhov siab dua thiab muab kev tiv thaiv corrosion ntau dua 50 xyoo kev pab cuam lub neej.
Txoj Kev Txhim Kho: Hom M tsis kam ua rau khoov thiab xav tau kev txhawb nqa ntxiv. Hom K qhov tawv tuaj yeem ua rau kev tswj xyuas nyuaj dua tab sis muaj kev tiv thaiv ntau dua thaum lub sijhawm ntxhib -hauv.
Tag Nrho Cov Nqi Them Nqi: Thaum Hom M yog pheej yig dua ib ko taw, qhov kev txiav txim siab yuav tsum txiav txim siab tag nrho cov nqi, suav nrog kev ua raws cai, kev ua haujlwm ntev, thiab kev pheej hmoo ntawm kev ua tsis tiav. Rau feem ntau cov tshuab ua haujlwm siab, Hom L sawv cev rau kev lag luam - tus qauv, tus nqi - kev xaiv zoo.
