Tightness test method of electric heating pipe, data source: People's Republic of China machinery industry standard JB/T2379-2016 "Hlau tubular hluav taws xob cua sov caij"
6.3 Seal test
6.3.1 Cheebtsam tsev foob kuaj
Cov khoom xyaw yog muab tso rau hauv dej acidified [hydrochloric acid ntxiv rau hauv dej kom cov dej acidified nrog hydrochloric acid concentration (feem ntau) ntawm 2 feem pua ~ 3 feem pua] rau 3h, thiab ntsuas tau coj los nthuav tawm qhov kawg ntawm cov khoom. mus rau qib ua kua (5 ~ 10) mm, thiab tom qab ntawd qhov ntsuas qhov ntsuas qhov ntsuas hluav taws xob, qhov ntsuas dej ntws tam sim no thiab rwb thaiv tsev tiv thaiv qhov ntsuas hluav taws xob tau ua tiav.
Lus Cim: Cov khoom no tuaj yeem raug tshem tawm rau cov khoom uas raug kuaj hydrostatic.
6.3.2 Component kawg foob xeem
6.3.2.1 Qhov yuav tsum tau muaj rau chav kuaj (chambers).
Cov kev cai rau lub xeem chamber (chamber) ntawm cov khoom kawg foob xeem yog raws li nram no:
a Cov Lus Qhia rau chav kuaj (chav) Hauv qhov chaw ua haujlwm zoo ntawm chav kuaj (chamber), ntsuas kub thiab av noo yuav tsum tau teeb tsa los saib xyuas cov xwm txheej ntsuas.
b Qhov ntsuas kub ntawm txhua qhov chaw hauv qhov chaw ua haujlwm zoo ntawm chav kuaj (chav) yuav tsum zoo ib yam thiab ua raws li qhov ntsuas kub kom ntau li ntau tau, thiab yuav tsum muaj peev xwm tswj tau 40 ± 2 degree, thiab cov av noo txheeb ze yuav tsum yog. khaws cia hauv thaj tsam ntawm (93 ntxiv rau 2-3 feem pua ).
Nco tseg: Qhov ntsuas kub ntawm ± 2 degree suav nrog qhov ua yuam kev ntawm kev ntsuas thiab qhov sib xws thiab qhov hloov pauv ntawm qhov chaw ua haujlwm zoo, txhawm rau tswj hwm txhua qhov xav tau cov av noo, qhov ntsuas kub ntawm qhov ntsuas yuav tsum tau tswj tsis pub dhau ±{{1} }.5 degree.
c Lub condensate nyob rau hauv lub xeem chamber (chamber) yuav tsum tsis tu ncua tso tawm, thiab lub discharged condensate yuav tsum tsis txhob siv raws li ib tug dej qhov chaw rau zus tau tej cov av noo ua ntej purification.
dThe resistivity ntawm cov dej ncaj qha siv los tsim cov av noo yuav tsum tsis txhob tsawg dua 500Ω·m.
e Cov yam ntxwv ntawm cov khoom thiab cov khoom siv hluav taws xob yuav tsum tsis txhob cuam tshuam rau cov xwm txheej hauv chav kuaj (chamber).
f Lub condensate ntawm phab ntsa thiab sab saum toj ntawm chav kuaj (chamber) yuav tsum tsis txhob poob rau qhov qub.
6.3.2.2 Test method:
ib. Cheebtsam yuav tsum tau muab tso rau hauv lub xeem chamber unpacked, ntawm txawv cov ntsiab lus, nyob rau hauv "npaj-rau-siv" thiab ib txwm ua hauj lwm qhov chaw los yog nyob rau hauv cov xwm txheej ntawm cov qauv tsim. Ua ntej preheat ntawm 40 degree nyob rau hauv lub thawv, thiab humidify thaum lub kub ntawm lub caij yog ruaj khov los tiv thaiv condensate ntawm lub caij.
b ua. Lub sijhawm xeem yog 48 teev
c. Tom qab qhov kawg ntawm qhov kev xeem, cov khoom raug tshem tawm los ntawm chav kuaj (chamber) thiab muab tso rau hauv ib qho chaw uas muaj qhov kub thiab txias ntawm 20 ± 5 degree, tsis muaj cua, tsis muaj hluav taws xob muaj zog, thiab cov txheeb ze av tsis ntau tshaj. 85 feem pua , thiab tom qab ntawd qhov ntsuas ntsuas qhov ntsuas hluav taws xob, ntsuas qhov ntsuas tam sim no thiab rwb thaiv tsev tiv thaiv qhov ntsuas hluav taws xob tau ua tiav.
d. Tag nrho lub sij hawm los ntawm kev tshem tawm cov khoom mus rau qhov kawg ntawm lub rwb thaiv tsev tiv thaiv voltage test yuav tsum tsis pub tshaj 10min
Kev rov qab los ntawm cov khoom raug tso cai tom qab kev sim foob.
