Umbhobho oshushu owandisiweyo ongenamthungo
Umbhobho wentsimbi oshushu owandisiweyo yimibhobho eshushu eyandisiweyo engenamthungo, enoxinano oluphantsi ngokwentelekiso kodwa ukucutheka kombhobho wentsimbi owomeleleyo (umbhobho ongenamthungo) unokubhekiswa njengokwandiswa kwe-thermal.Inkqubo ye-skew rolling okanye indlela yokudweba yokwandisa ububanzi bombhobho.Ukuqina kombhobho wentsimbi ngexesha elifutshane, kunokuvelisa iintlobo ezingaqhelekanga kunye nezikhethekileyo zeetyhubhu ezingenamthungo ezinexabiso eliphantsi kunye nokusebenza kakuhle kwemveliso, uphuhliso lwangoku lwamazwe ngamazwe kwintsimi ye-tube rolling.
Umbhobho wokwandisa oshushu ngokwandisa ububanzi bombhobho ukugqiba iinkqubo - inkqubo yokwandisa i-thermal yokuveliswa kombhobho wentsimbi.Umbhobho wokwandiswa oshushu uqhele ukubhekiswa kwimibhobho yentsimbi engenamthungo eyandisiweyo.
IiParameters zobuChwephesha boKwandisa uMbhobho wentsimbi ongenamthungo:
Ubungakanani obuqhelekileyo | Ngaphandle | Ukutyeba koDonga ngokweSibizo (mm) | |||||||||||||
DN | NPS | OD(MM) | SCH | SCH | SCH | STD | SCH | SCH | XS | SCH | SCH | SCH | SCH | SCH | XXS |
200 250 300 | 8 10 12 | 219.1 273.1 323.9 | 3.76 4.19 4.57 | 6.35 6.35 6.35 | 7.04 7.80 8.38 | 8.18 9.27 9.53 | 8.18 9.27 10.31 | 10.31 12.70 14.27 | 12.70 12.70 12.70 | 12.70 15.09 17.48 | 15.09 18.26 21.44 | 18.26 21.44 25.40 | 20.62 25.40 28.58 | 23.01 28.58 33.32 | 22.23 25.40 25.40 |
350 400 450 | 14 16 18 | 355.6 406.4 457.2 | 6.35 6.35 6.35 | 7.92 7.92 7.92 | 9.53 9.53 11.13 | 9.53 9.53 9.53 | 11.13 12.70 14.27 | 15.09 16.66 19.05 | 12.70 12.70 12.70 | 19.05 21.44 23.83 | 23.83 26.19 29.36 | 27.79 30.96 34.93 | 31.75 36.53 39.67 | 35.71 40.49 45.24 | -- |
500 550 600 | 20 22 24 | 508 559 610 | 6.35 6.35 6.35 | 9.53 9.53 9.53 | 12.70 12.70 14.27 | 9.53 9.53 9.53 | 15.09 - 17.48 | 20.62 22.23 24.61 | 12.70 | 26.19 28.58 30.96 | 32.54 34.93 38.89 | 38.10 41.28 46.02 | 44.45 47.63 52.37 | 50.01 53.98 59.54 | -- |
500 550 600 | 20 22 24 | 508 559 610 | 6.35 6.35 6.35 | 9.53 9.53 9.53 | 12.70 12.70 14.27 | 9.53 9.53 9.53 | 15.09 - 17.48 | 20.62 22.23 24.61 | 12.70 12.70 12.70 | 26.19 28.58 30.96 | 32.54 34.93 38.89 | 38.10 41.28 46.02 | 44.45 47.63 52.37 | 50.01 53.98 59.54 | -- |
660 700 750 | 26 28 30 | 660 711 762 | 7.92 7.92 7.92 | 12.70 12.70 12.70 | — 15.88 15.88 | 9.53 9.53 9.53 | -- | -- | 12.70 12.70 12.70 | -- | -- | -- | -- | -- | -- |
800 850 900 | 32 34 36 | 813 864 914 | 7.92 7.92 7.92 | 12.70 12.70 12.70 | 15.88 15.88 15.88 | 9.53 9.53 9.53 | 17.48 17.48 19.05 | -- | 12.70 12.70 12.70 | -- | -- | -- | -- | -- | -- |
Ububanzi bangaphandle (mm) / | SCH | SCH | SCH | STD | SCH | SCH | XS | SCH | SCH | SCH | SCH | SCH |
457 | 6.35 | 7.92 | 11.13 | 9.53 | 14.27 | 19.05 | 12.70 | 23.88 | 29.36 | 34.93 | 39.67 | 45.24 |
508 | 6.35 | 9.53 | 12.70 | 9.53 | 15.09 | 20.62 | 12.70 | 26.19 | 32.54 | 38.10 | 44.45 | 50.01 |
559 | 6.35 | 9.53 | 12.70 | 9.53 | 22.23 | 12.70 | 28.58 | 34.93 | 41.28 | 47.63 | 53.98 | |
610 | 6.35 | 9.53 | 14.27 | 9.53 | 17.48 | 24.61 | 12.70 | 30.96 | 38.39 | 46.02 | 52.37 | 59.54 |
660 | 7.92 | 12.70 | 9.53 | 12.70 | ||||||||
711 | 7.92 | 12.70 | 15.88 | 9.53 | 12.70 | |||||||
762 | 7.92 | 12.70 | 15.88 | 9.53 | 12.70 | |||||||
Phawula: Lo mgangatho ungentla kunye nokucaciswa kwenzelwe ireferensi kuphela, sinokuvelisa imveliso elungiselelwe ngokwesicelo somthengi. |
Unyango lomphezulu wombhobho wentsimbi:
Ukuze kuphuculwe ubomi benkonzo yombhobho we-oyile, unyango lomphezulu ludla ngokuqhutywa ukuququzelela indibaniselwano eqinileyo yombhobho wentsimbi kunye ne-anticorrosive coating.Iindlela zokusetyenzwa eziqhelekileyo zezi: ukucoca, ukuchithwa kwesixhobo, ukuchola, ukudutyulwa kokudubula ukutshabalalisa iindidi ezine.
I-1 yokucoca Igrisi, uthuli, i-lubricant, i-organic matter ebambelele kumphezulu wepayipi yensimbi, ngokuqhelekileyo isebenzisa i-solvent, i-emulsion yokucoca indawo.Nangona kunjalo, i-rust, i-oxide yesikhumba kunye ne-welding slag phezu kombhobho wensimbi ayikwazi ukususwa, ngoko ke enye. iindlela zonyango ziyafuneka.Isixhobo sokususa umhlwaUmbhobho wentsimbi umphezulu oxide, umhlwa, welding slag, unokusebenzisa ibrashi yocingo yentsimbi ukucoca kunye nokupolisha umphezulu unyango.Isixhobo derusting inokwahlulwa ibe manual kunye namandla, isixhobo manual derusting unokufikelela Sa
Inqanaba le-2, i-derusting yesixhobo samandla inokufikelela kwinqanaba le-Sa3. Ukuba ubuso bombhobho wensimbi bufakwe ngesikhumba se-oxide esomeleleyo, kunokuba nzima ukususa umhlwa ngoncedo lwezixhobo, ngoko kufuneka sifumane ezinye iindlela.
I-3 pickling Iindlela eziqhelekileyo zokukhetha ziquka i-chemistry kunye ne-electrolysis.Kodwa kuphela i-chemical pickling isetyenziselwa ukukhuselwa kwe-pipeline corrosion.I-Chemical pickling inokufikelela kwinqanaba elithile lokucoceka kunye noburhabaxa phezu kombhobho wensimbi, olungele imigca ye-anchor elandelayo. ukudutyulwa (isanti) emva kokulungiswa kwakhona.
I-4 idubule yokuqhushumba yokususa umhlwaNgamandla aphezulu emoto aqhube iincakuba ezijikelezayo ezinesantya esiphezulu, igrit yentsimbi, isithonga sentsimbi, icandelo, iiminerali kunye nolunye ucingo oluluqilima phantsi kwentshukumo yamandla ecentrifugal kumbhobho wentsimbi wokutshiza kunye nokukhutshwa okukhulu, susa ngokucokisekileyo umhlwa, iioksidi. kunye nokungcola kwelinye icala, kwelinye icala, umbhobho wentsimbi phantsi kwesenzo sempembelelo yobundlobongela oburhabaxa kunye namandla okukhuhlana, ukuphumeza uburhabaxa obufunekayo obufanayo.Phakathi kweendlela ezine zonyango, ukudutyulwa kokudubula kunye nokuchithwa yindlela efanelekileyo yonyango ye-pipe derusting.Ngokubanzi, ukudutyulwa kokudubula kunye nokuchithwa kusetyenziswa ikakhulu kunyango lwangaphakathi lombhobho wentsimbi, kwaye ukudutyulwa nokudutyulwa kusetyenziswa ikakhulu kunyango lwangaphandle lombhobho wentsimbi.