ASTM A556 simbi pombi inonyanya kushandiswa seinotonhora-inodhonzwa seamless kabhoni simbi pombi ye tubular feedwater heaters.
Chiyero chayo chekushandisa isimbi isina musono pombi ine dhayamita yekunze saizi pakati pe15.9-31.8mm uye ukobvu hwemadziro husiri pasi pe1.1mm.
Ichi chinyorwa chinotarisa pane pombi yesimbi uye haisanganisi U-machubhu anotaurwa muyero.
Kunze dhayamita: 5/8 - 1 1/4 mukati. [15.9 -31.8 mm].
Rusvingo ukobvu: ≥ 0.045 mu [1.1 mm].
ASTM A556 inoronga mamakisi matatu,Giredhi A2, Giredhi B2,uyeGrade C2.
Machubhu esimbi achagadzirwa neaisina musonogadzira uye ichakwevewa kutonhora.
Cold-drawn seamless simbi machubhu inopa yakakwira dimensional kurongeka uye yakanaka kupedzisa kwepamusoro uku uchinatsa iyo microstructure uye ichiwedzera ma mechanic zvimiro zvakaita sesimba uye kuoma.Chimiro chisina musono chinoita kuti machubhu agadzikane uye akachengeteka kana akaiswa pasi pekumanikidzwa kwakanyanya uye tembiricha, zvichiita kuti ave akakodzera maindasitiri ekushandisa anoda kurongeka kwakanyanya uye kuita.
Nekudaro, machubhu esimbi anodhonzwa anotonhorwa anodhura kugadzira nekuti magadzirirwo awo akanyanya kuoma uye anoda mashandiro akaomarara nemidziyo.Pamusoro pezvo, kuita kwavo kushoma kwekugadzira, kunyanya mukugadzirwa kwehuwandu hwepamusoro, haina hupfumi seyekutenderera kunopisa, uye mune dzimwe nguva panogona kunge paine kurasikirwa kwezvinhu, kudzikamisa kushandiswa kwavo mune mamwe maapplication.
Machubhu anodhonzwa nechando anofanira kucheneswa kupisa mushure mekupfuura kutonhora kwekupedzisira patembiricha inosvika 1200°F [640°C] kana kupfuura kuitira kuti pave nechokwadi chekuti dhiri rinogutsa pakuumburudzwa mumashiti echubhu uye kusangana nemichina sezvakatsanangurwa.
Kana kuongororwa kwechigadzirwa kuchiitwa, tarisa kune ASTM A751 yenzira dzekuyedza.
1. Tensile Property
Nzira yekuedza: ASTM A450 Chikamu 7.
Kune mabhechi anosvika makumi mashanu machubhu, 1 chubhu ichasarudzwa kuti iongororwe.
Kune mabhechi anopfuura makumi mashanu machubhu, maviri machubhu achasarudzwa kuti aedzwe.
2. Kuoma
Nzira yekuedza: ASTM A450 Chikamu 23.
Mienzaniso kubva kumachubhu maviri ebvunzo kubva mujenya rega rega ichaongororwa kuoma kweBrinell kana Rockwell.
Iyo Rockwell kuoma kwepombi haifaniri kudarika iyo inoratidzwa mutafura.
| Giredhi | Kuoma |
| Giredhi A2 | 72 HRBW |
| Giredhi B2 | 79 HRBW |
| Grade C2 | 89 HRBW |
3. Flattening Test
Nzira yekuedza: ASTM A450 Chikamu 19.
Muedzo wekubata kumeso uchaitwa pane imwe sampuli kubva kumagumo ega ega echubhu yesimbi yakapedzwa kubva pakusarudzwa kweasingapfuure 125 machubhu kubva kune yega yega.
4. Flaring Test
Nzira yekuedza: ASTM A450 Chikamu 21.
Miedzo yemoto ichaitwa pane imwe sampuli kubva kumagumo ega ega echubhu yakapedzwa, isingapfuure zana nemakumi maviri neshanu machubhu akasarudzwa kubva mubatch yega yega.
Iko hakuna inosungirwa hydrostatic bvunzo yemapombi esimbi.
Nekudaro, yega yega U-pombi inofanirwa kuongororwa hydrostatically neiyo isiri-corrosive fluid.
Imwe neimwe chubhu ichayedzwa neisina kuparadza yekuyedza chiridzwa chinokwanisa kuona chakakanganisika muchikamu chese chechubhu mushure mekupisa kupisa kwepasi zvichitevera kutonhora kwekupedzisira kudhirowa.
Idzo dzisiri dzekuparadza bvunzo nzira dzeSpecificationE213, SpecificationE309(ye ferromagnetic zvinhu), TsanangudzoE426(yezvinhu zvisiri-magineti), kana TsanangudzoE570inogona kusarudzwa kuongororwa.
Izvi zvinotevera kushivirira hazvishande kune yakabhenda chikamu cheU-tube.
Iyo pombi yakapedzwa inofanira kunge isina chikero asi inogona kuva nepamusoro oxide firimu pamusoro.
Machubhu akapedzwa anofanira kutwasanuka uye ane magumo akatsetseka asina maburrs.Machubhu achave nemagumo akafanana neanoshanda uye haazove asina kusakwana kwepamusoro izvo zvisingakwanisi kubviswa mukati mezvinotenderwa kushivirira madziro.
Kubviswa kwekusakwana kwepamusoro senge mavanga ekubata, kutwasanuka mamaki, mandrel akareruka uye mavanga ekufa, makomba asina kudzika, uye mapatani ezvikero hazvizodikanwa chero zviri mukati memudhuri unobvumirwa kushivirira.
Madhayamita emukati nekunze epombi yakapedzwa inofanira kuvharwa kudzivirira kuparara panguva yekufambisa.
Common coatings ndeyengura kudzivirira mafuta, varnishes, kanapaints.
Sarudzo yemidziyo yekupfekedza inowanzoenderana nezvinodiwa zvekushandisa zvepombi yesimbi, iyo inotarirwa kushandiswa nharaunda, uye nguva yekudzivirira.
Tubular feedwater heaters: Ichi ndicho chimwe chezvakajairika kunyorera ASTM A556 simbi tubing.
Muindasitiri yemagetsi, mafeedwater heaters anoshandiswa preheat boiler feedwater, kazhinji nekubvisa chiutsi.Kushandiswa kwemhando iyi yesimbi tubing inobvumira kushandiswa kwakanaka kwesimba rinopisa, kuvandudza simba rose rekushanda uye kushanda kwehurongwa.
Heat exchangers uye condensers: Nekuda kweiyo yakanakisa kupisa kupisa uye kushorwa kwekupokana, ASTM A556 simbi tubing yakakodzerawo kushandiswa mune mamwe marudzi ekupisa kupisa uye condensers, ayo anoshandiswa mumhando dzakasiyana dzemakemikari, petrochemical, uye mamwe maindasitiri maitiro.
High-pressure steam systems: Iyo yepamusoro-tembiricha uye yakakwirira-kumanikidza kuramba kweASTM A556 tubing inoita kuti ive yakakodzera kushandiswa mune yakanyanya-kudzvanywa masystem uye mamwe maapplication anoda yakanyanya kudzvanywa uye tembiricha kuramba.
ASTM A179/A179M- Iyi ndiyo chiyero cheinotonhora-inodhonzwa seamless kabhoni simbi yekupisa inochinjanisa uye condenser machubhu e cryogenic service.
ASTM A192/A192M- Inotsanangura tekinoroji zvinodiwa zveasina kabhoni simbi boiler machubhu emaboilers anoshandiswa mune yakanyanya-kumanikidza sevhisi.
ASTM A210/A210M- Yakajairwa seamless yepakati kabhoni uye kabhoni-manganese simbi boiler machubhu ema boilers uye superheaters.
ASTM A213/A213M- Inopa zviyero zveasina musono ferritic uye austenitic alloy simbi boiler, superheater, uye kupisa exchanger machubhu.
ASTM A249/A249M- Yakajairika inoshanda kune welded austenitic simbi boiler, superheater, heat exchanger, uye condenser machubhu.
ASTM A334/A334M- Yakajairwa isina musono uye welded kabhoni uye alloy simbi tubing ye cryogenic service.
Chimwe nechimwe chezviyero izvi chinovhara machubhu esimbi anoshandiswa mukutsinhanisa kupisa, boilers kana mamwe maapplication.Ndeipi chiyero chinosarudzwa zvinoenderana nezvinodiwa zvekushandisa, senge tembiricha yekushandisa, chiyero chekumanikidza, uye inotarisirwa kuramba corrosion.
Kubva payakavambwa muna 2014, Botop Steel yave mutengesi anotungamira wekabhoni simbi pombi kuChamhembe kweChina, inozivikanwa nebasa repamusoro, zvigadzirwa zvemhando yepamusoro, uye mhinduro dzakakwana.
Iyo kambani inopa dzakasiyana siyana dzekabhoni simbi mapaipi uye zvigadzirwa zvine hukama, zvinosanganisira isina musono, ERW, LSAW, uye SSAW simbi pombi, pamwe neyakakwana mutsara wepombi fittings uye flanges.Zvigadzirwa zvayo zvehunyanzvi zvinosanganisira alloys epamusoro-giredhi uye austenitic simbi isina tsvina, yakagadzirirwa kusangana nezvinodiwa zveakasiyana mapurojekiti epombi.
