UMvelisi weMibhobho yentsimbi eKhokelayo kunye noMboneleli eTshayina |

Yintoni inkcazo ye-ASTM A672?

I-ASTM A672ngumbhobho wentsimbi owenziwe kwipleyiti yomgangatho wenqanawa yoxinzelelo,Ukuhlanganiswa koMbane-oWelded (EFW)kwinkonzo yoxinzelelo oluphezulu kumaqondo obushushu aphakathi.

Amaqhosha okukhangela

UHlelo lweBanga le-ASTM A672

Ihlelwe ngokohlobo lwepleyiti esetyenziselwa ukuvelisa iityhubhu zentsimbi.

Amabakala ahlukeneyo amele ukubunjwa kweekhemikhali ezahlukeneyo kunye neempawu zomatshini zoxinzelelo oluhlukeneyo kunye neemeko zokushisa.

IBanga lombhobho Uhlobo lweNsimbi Ukucaciswa kwe-ASTM
Hayi. IBanga
A45 ikhabhoni ecacileyo A285 / A285M A
A50 ikhabhoni ecacileyo A285 / A285M B
A55 ikhabhoni ecacileyo A285 / A285M C
B 60 ikhabhoni ecacileyo, ibulewe A515 / A515M 60
B 65 ikhabhoni ecacileyo, ibulewe A515 / A515M 65
B 70 ikhabhoni ecacileyo, ibulewe A515 / A515M 70
C 55 ikhabhoni ecacileyo, ibulewe, ingqolowa entle A516 / A516M 55
C 60 ikhabhoni ecacileyo, ibulewe, ingqolowa entle A516 / A516M 60
C 65 ikhabhoni ecacileyo, ibulewe, ingqolowa entle A516 / A516M 65
C70 ikhabhoni ecacileyo, ibulewe, ingqolowa entle A516 / A516M 70
D 70 manganese-silicon, eqhelekileyo A537 / A537M 1
D 80 manganese-silicon, Q&TA A537 / A537M 2
H 75 manganese-molybdenum, eqhelekileyo A302 / A302M A
H80 manganese-molybdenum, eqhelekileyo A302 / A302M B, C, okanye D
J 80 manganese-molybdenum, Q&TA A533 / A533M Cl-1B
J 90 manganese-molybdenum, Q&TA A533 / A533M Cl-2B
J 100 manganese-molybdenum, Q&TA A533 / A533M Cl-3B
L 65 molybdenum A204 / A204M A
L 70 molybdenum A204 / A204M B
L 75 molybdenum A204 / A204M C
N 75 manganese-silicon A299 / A299M A

AQ & T = ucinywe kwaye unomsindo.

ВNaliphi na ibakala linokunikwa.

Sinokuqala ngokumisela uhlobo lombhobho wensimbi ngeeleta kwibakala.

Amabanga aqala ngoonobumba A, B, no-C adla ngokubonisaumbhobho wentsimbi yekhabhoni.

Amabanga aqala ngoonobumba D, H, J, L, no-N abonisaumbhobho wentsimbi yengxubevange.

ASTM A672 Class Ukuhlelwa

Iityhubhu zihlelwa ngokohlobo lonyango lobushushu abalufumanayo ngexesha lenkqubo yokuvelisa kunye nokuba ngaba bahlolwe nge-radiographical kunye noxinzelelo.

Iklasi Unyango lobushushu kumbhobho Iradiyografi, jonga inqaku: Uvavanyo loxinzelelo, jonga inqaku:
10 akukho nanye akukho nanye akukho nanye
11 akukho nanye 9 akukho nanye
12 akukho nanye 9 8.3
13 akukho nanye akukho nanye 8.3
20 kuthotyiwe uxinzelelo, jonga ku-5.3.1 akukho nanye akukho nanye
21 kuthotyiwe uxinzelelo, jonga ku-5.3.1 9 akukho nanye
22 kuthotyiwe uxinzelelo, jonga ku-5.3.1 9 8.3
23 kuthotyiwe uxinzelelo, jonga ku-5.3.1 akukho nanye 8.3
30 iqhelekile, jonga ku-5.3.2 akukho nanye akukho nanye
31 iqhelekile, jonga ku-5.3.2 9 akukho nanye
32 iqhelekile, jonga ku-5.3.2 9 8.3
33 iqhelekile, jonga ku-5.3.2 akukho nanye 8.3
40 iqhelekile kwaye inomsindo, jonga ku-5.3.3 akukho nanye akukho nanye
41 iqhelekile kwaye inomsindo, jonga ku-5.3.3 9 akukho nanye
42 iqhelekile kwaye inomsindo, jonga ku-5.3.3 9 8.3
43 iqhelekile kwaye inomsindo, jonga ku-5.3.3 akukho nanye 8.3
50 ucime wacaphuka, jonga ku-5.3.4 akukho nanye akukho nanye
51 ucime wacaphuka, jonga ku-5.3.4 9 akukho nanye
52 ucime wacaphuka, jonga ku-5.3.4 9 8.3
53 ucime wacaphuka, jonga ku-5.3.4 akukho nanye 8.3

Ingqwalasela ekhethekileyo kufuneka ihlawulwe kwiqondo lokushisa elilindelekileyo xa ukhetha iklasi yezinto ezifanelekileyo.Jonga kwiinkcukacha ze-ASTM A20/A20M.

ASTM A672 Ubungakanani Uluhlu

Uluhlu lwesayizi olucetyiswayo: DN≥400mm[16 in] kunye ne-WT≤75mm[3 kwi].

Ngobunye ubungakanani bombhobho, ngaphandle kokuba ihlangabezana nazo zonke ezinye iimfuno zolu luhlu, ingasetyenziswa kwakhona.

Ukhuseleko lweWelding

Ii-seams ziyakudityaniswa kabini, zingene ngokuzeleyo.

I-welds iya kwenziwa ngesandla okanye ngokuzenzekelayo ngenkqubo yombane ebandakanya ukubekwa kwesinyithi.

Iiwelds zinokuhlolwa kusetyenziswa iradiography kwaye kufuneka zilandele izibonelelo ezikwiCandelo VII UW-51 le-ASME Boiler kunye neKhowudi yeVessel yoxinzelelo.

Ubude be-weld abuyi kudlula i-3 mm [1/8 in].

Unyango lobushushu

Zonke iiklasi ngaphandle kwe-10, 11, 12, kunye ne-13 ziya kunyangwa ubushushu kwiziko elilawulwa ukuya ku-±25 °F[± 15°C]:

Iiklasi 20, 21, 22, kunye 23

Umbhobho uya kufudunyezwa ngokufanayo kwiqondo lokushisa emva kwe-weld eliboniswe kwiThebhile 2 ubuncinane be-1 h / ngo.[0.4 h/cm] ubukhulu okanye i-1 h, nayiphi na enkulu.

Iiklasi 30, 31, 32, kunye nama-33

Umbhobho uya kutshiswa ngokufanayo kwiqondo lokushisa kwi-austenitizing range kwaye ungadluli ubushushu obuqhelekileyo obuqhelekileyo obuboniswe kwiThebhile 2 kwaye emva koko ipholile emoyeni kwiqondo lokushisa.

Iiklasi 40, 41, 42, kunye nama-43

Umbhobho uya kuba yinto eqhelekileyo.

Umbhobho uza kufudunyezwa kwakhona kwiqondo lobushushu elibonakaliswe kwiTheyibhile 2 njengobuncinane kwaye ugcinwe kwiqondo lobushushu ubuncinane be-0.5 h/in.[0.2 h/cm] ubukhulu okanye ngenxa1/2h, nokuba yeyiphi enkulu, kwaye ipholiswe ngumoya.

Iiklasi 50, 51, 52, kunye nama-53

Umbhobho uya kutshiswa ngokufanayo kumaqondo obushushu ngaphakathi koluhlu lwe-austenitizing kwaye ungagqithisi ubushushu bokucima ubuninzi obuboniswe kwiThebhile 2.

Emva koko, cima emanzini okanye ngeoli.Emva kokucima, umbhobho uya kuhlaziywa kwiqondo lokushisa elincinci eliboniswe kwiThebhile 2 kwaye ligcinwe apho.

iqondo lobushushu ubuncinane be-0.5 h/intshi [0.2 h/cm] ubukhulu okanye i-0.5 h, leliphi na elikhulu ngakumbi, nelipholiswe ngumoya.

I-ASTM A672 Iiparamitha zonyango lobushushu

Amacandelo eMichiza

Kuya kuba noxanduva lomenzi ukuvavanya ukubunjwa kweekhemikhali zepleyiti kunye ne-welds ukuthotyelwa kweemfuno zenkcazo yepleyiti yezinto eziyalelweyo kunye nenkqubo ye-welding yokufaka i-weld metal, ngokulandelanayo.

Uvavanyo loxinzelelo

Ukuphindaphindwa kovavanyo: umzekelo omnye kwiqashiso ngalinye.

Indlela yoVavanyo: Imizekelo yovavanyo iya kwenziwa ngokuhambelana ne-QW-150 kwiCandelo le-IX le-ASME yeBoiler kunye neKhowudi yeVessel yoxinzelelo.Iisampulu ziya kuvavanywa kwiqondo lobushushu begumbi ngokuhambelana neeNdlela zoVavanyo kunye neNgcaciso ye-A370.

Ukongeza kwiBanga le-Dxx, i-Hxx, i-Jxx, kunye ne-Nxx kwiiKlasi ze-3x, i-4x, kunye ne-5x yeepropati ezinqamlezayo ze-base plate, ziya kumiselwa kwiisampuli ezisikwe kumbhobho ophethwe ukushisa.

Iimfuno zeziphumo: Iipropati ezinqamlezileyo zobunzima bomdibaniso odityanisiweyo ziya kuhlangabezana nezona mfuno zisezantsi zokuqina kokugqibela kwemathiriyeli yepleyiti echaziweyo. 

Uvavanyo lwe-Transverse-Guided-Weld-Bend

Inani leemvavanyo: Ubuninzi bovavanyo: kube kanye kwibhetshi nganye, imizekelo emibini

Indlela yovavanyo: Iimfuno zovavanyo lweeNdlela zoVavanyo kunye neeNkcazo ze-A370, umhlathi A2.5.1.7 ziya kuhlangatyezwa.

Kuba ubukhulu bodonga ngaphezulu3/ 8ngaphakathi [10 mm] kodwa ngaphantsi kwe3/4in [19 mm] iimvavanyo ze-Side-bend zinokwenziwa endaweni yovavanyo lobuso kunye neengcambu.

Ngobunzima bodonga3/4ngaphakathi [19 mm] nangaphezulu kwemizekelo yomibini iya kufakwa kuvavanyo lwe-side-bend.

Iimfuno zeziphumo: Uvavanyo lokugoba luya kwamkeleka ukuba akukho zintanda okanye ezinye iziphene ezidlulayo1/8in. [3 mm] kulo naliphi na icala zikhona kwintsimbi edibeneyo okanye phakathi kwentsimbi kunye nesiseko sesinyithi emva kokugoba.

Iintanda ezivela ecaleni komfanekiso ngexesha lovavanyo, kwaye ezingaphantsi1/4ngo. [6 mm] ilinganiswe kulo naliphi na icala ayisayi kuqwalaselwa.

Uvavanyo loxinzelelo

Iiklasi X2 kunye X3 umbhobho ziya kuvavanywa ngokuhambelana Specification A530/A530M, Hydrostatic Test Requirements.

Uviwo lweRadiographic

Ubude obupheleleyo beweld nganye yeeKlasi X1 kunye ne-X2 buya kujongwa ngeradiographically ngokuhambelana kwaye kuhlangabezene neemfuno ze-ASME Boiler kunye neKhowudi yeVessel yoxinzelelo, iCandelo VIII, umhlathi UW-51.

Uvavanyo lwe-radiographic lunokwenziwa ngaphambi konyango lobushushu.

Ukunyamezelwa komgangatho we-ASTM A672

Ezemidlalo Ukunyamezela Ixabiso Phawula
Ngaphandle Ububanzi ±0.5% Ngokusekelwe kumlinganiselo ojikelezayo
Ngaphandle kwe-Roundness 1%. Umahluko phakathi kweedayamitha ezinkulu nezincinci zangaphandle
Ulungelelwaniso 1/8 ngaphakathi [3 mm] Ukusebenzisa i-10 ft [3 yeemitha] edge ethe tye ebekwe ukuze iziphelo zombini zidibane nombhobho
Ukutyeba 0.01 ngaphakathi [0.3 mm] Ubuncinane bobunzima bodonga bungaphantsi kobungqingqwa obuxeliweyo
Ubude 0-+0.5in [0-+13mm] iziphelo ezingenakwenziwa

 

ASTM A672 Imbonakalo

Umbhobho ogqityiweyo awuyi kuba neziphene ezinobungozi kwaye uya kuba nesiphelo esifana nomsebenzi.

Iimfuno ezifanayo njengakwingcaciso ye-ASTM A20/A20M yokugqitywa komphezulu weepleyiti zentsimbi.

Iziphene kunye noLungiso

Ukuzimisela Kwesiphene

Umgangatho we-ASTM A672 awukhankanyi imigangatho eyamkelekileyo yeziphene kunye neendlela zokumisela imibhobho kwaye idla ngokubhekisa kwimigangatho efanelekileyo yobunjineli kunye nezenzo zeshishini.

Iziphene zangaphakathi: Iziphene zangaphakathi zingabandakanya i-porosity, i-slag, i-inclusions, njl.

Iziphene zangaphandle: Iziphene zangaphandle zingabandakanya iintanda, izibonda, imikrwelo, njl.

Ukususwa ngokuRegrinding

Iziphene zobuso zingasuswa ngokugrumba okanye ngomatshini kunye nobukhulu obushiyekileyo obungekho ngaphantsi kwe-0.3 mm ngaphantsi kobukhulu obuqhelekileyo.

I-regrind depression kufuneka idityaniswe ngokulinganayo kwindawo ejikelezileyo.

Ukulungiswa kweWelding

Iziphene ziya kususwa ngeendlela ezifanelekileyo zokusika okanye ukusika i-thermal okanye iidicing kwaye zilungiselelwe ukulungisa imigodi edibeneyo.

kunye nokuhlolwa ngemitha ngokuhambelana ne-ASME Boiler kunye neKhowudi yeVessel yoxinzelelo, iCandelo VIII, umhlathi UW-51.

Ubude obupheleleyo bombhobho olungisiweyo buya kunyangwa ngobushushu emva kokulungiswa ngokuhambelana neemfuno zombhobho ochaziweyo.

Ukumakishwa kwe-ASTM A672

Ukumakishwa kufuneka kuqulathe oku kulandelayo:

Isazisi somvelisi, esifana nophawu okanye ilogo.

Ukucaciswa kombhobho (ubungakanani, ubukhulu bodonga, njl.).

Ibakala lezinto eziphathekayo okanye uhlobo lombhobho.Umzekelo: C60-22 (isifinyezo sebakala: C60 kunye neklasi 22).

Umgangatho wokwenziwa kombhobho yi-ASTM A672.

Umhla wemveliso okanye inombolo yecandelo lemveliso.

Ukusetyenziswa kwe-ASTM A672 yentsimbi yombhobho

Kwishishini lamandla ombane, i-ASTM A672 Electric Welded Steel Pipe isetyenziswa ngokuqhelekileyo ukuhambisa umphunga kwiinkqubo zebhoyila.

Kwishishini lemichiza, i-ASTM A672 i-welded yentsimbi yombhobho idla ngokusetyenziselwa ukuthutha iikhemikhali ezahlukeneyo, i-asidi, kunye nezisombululo zealkali, kunye nezinye imidiya.

Kwishishini leoli kunye negesi, i-ASTM A672 yentsimbi edityanisiweyo yombhobho iqhele ukusetyenziselwa ukuthutha i-oyile ekrwada, igesi yendalo, kunye nolunye ulwelo okanye iigesi.

Ukusetyenziswa kwe-ASTM A672 yentsimbi yombhobho
Ukusetyenziswa kwe-ASTM A672 yentsimbi yombhobho

Singumvelisi wemibhobho yentsimbi yekhabhoni ekumgangatho ophezulu odityanisiweyo kunye nomthengisi ovela eChina, kunye nesitokhwe semibhobho yentsimbi engenamthungo, ekunika uluhlu olubanzi lwezisombululo zemibhobho yentsimbi!

Tags: ASTM a672, efw, carbon steel pipe, ibakala.


Ixesha lokuposa: Apr-23-2024

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