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Iyini imininingwane ye-ASTM A672?

I-ASTM A672ipayipi lensimbi elenziwe ngepuleti lekhwalithi yomkhumbi ocindezelayo,I-Electric-Fusion-Welded (EFW)ngesevisi enengcindezi ephezulu emazingeni okushisa aphakathi nendawo.

Izinkinobho Zokuzulazula

I-ASTM A672 Isigaba Sebanga

Ihlukaniswa ngokohlobo lwepuleti elisetshenziselwa ukwakha amashubhu ensimbi.

Amamaki ahlukene amelela ukwakheka kwamakhemikhali ahlukene kanye nezakhiwo zemishini zokucindezela okuhlukile nezimo zokushisa.

Ibanga lombhobho Uhlobo Lwensimbi Ukucaciswa kwe-ASTM
Cha. Ibanga
A 45 ikhabhoni engenalutho I-A285 / A285M A
A50 ikhabhoni engenalutho I-A285 / A285M B
A 55 ikhabhoni engenalutho I-A285 / A285M C
B 60 plain carbon, wabulawa I-A515 / A515M 60
B 65 plain carbon, wabulawa I-A515 / A515M 65
B 70 plain carbon, wabulawa I-A515 / A515M 70
C 55 ikhabhoni engenalutho, ibulewe, okusanhlamvu okuhle I-A516 / A516M 55
C 60 ikhabhoni engenalutho, ibulewe, okusanhlamvu okuhle I-A516 / A516M 60
C 65 ikhabhoni engenalutho, ibulewe, okusanhlamvu okuhle I-A516 / A516M 65
C70 ikhabhoni engenalutho, ibulewe, okusanhlamvu okuhle I-A516 / A516M 70
D70 i-manganese-silicon, ejwayelekile I-A537 / A537M 1
D80 manganese-silicon, Q&TA I-A537 / A537M 2
H75 manganese-molybdenum, evamile I-A302 / A302M A
H80 manganese-molybdenum, evamile I-A302 / A302M B, C, noma D
j80 manganese-molybdenum, Q&TA I-A533 / A533M Cl-1B
j90 manganese-molybdenum, Q&TA I-A533 / A533M Cl-2B
J 100 manganese-molybdenum, Q&TA I-A533 / A533M Cl-3B
L 65 i-molybdenum I-A204 / A204M A
L 70 i-molybdenum I-A204 / A204M B
L 75 i-molybdenum I-A204 / A204M C
N 75 i-manganese-silicon I-A299 / A299M A

AI-Q&T = ivaliwe futhi ithambile.

ВNoma yiliphi ibanga linganikezwa.

Singaqale sinqume uhlobo lwepayipi lensimbi ngezinhlamvu ezisebangeni.

Amabanga aqala ngezinhlamvu A, B, kanye no-C avame ukukhombacarbon steel pipe.

Amabanga aqala ngezinhlamvu D, H, J, L, kanye no-N akhombisai-alloy steel pipe.

I-ASTM A672 Isigaba Sokuhlukaniswa

Amashubhu ahlukaniswa ngokohlobo lokwelashwa okushisa akutholayo phakathi nenqubo yokukhiqiza nokuthi ahlolwe yini nge-radiographical futhi ahlolwe ingcindezi.

Ikilasi Ukwelashwa kokushisa epayipini I-Radiography, bheka inothi: Ukuhlolwa kwengcindezi, bheka inothi:
10 akukho akukho akukho
11 akukho 9 akukho
12 akukho 9 8.3
13 akukho akukho 8.3
20 ukucindezeleka kuphelile, bheka 5.3.1 akukho akukho
21 ukucindezeleka kuphelile, bheka 5.3.1 9 akukho
22 ukucindezeleka kuphelile, bheka 5.3.1 9 8.3
23 ukucindezeleka kuphelile, bheka 5.3.1 akukho 8.3
30 okwejwayelekile, bheka 5.3.2 akukho akukho
31 okwejwayelekile, bheka 5.3.2 9 akukho
32 okwejwayelekile, bheka 5.3.2 9 8.3
33 okwejwayelekile, bheka 5.3.2 akukho 8.3
40 ijwayelekile futhi inolaka, bheka 5.3.3 akukho akukho
41 ijwayelekile futhi inolaka, bheka 5.3.3 9 akukho
42 ijwayelekile futhi inolaka, bheka 5.3.3 9 8.3
43 ijwayelekile futhi inolaka, bheka 5.3.3 akukho 8.3
50 ucime futhi uthukuthele, bheka 5.3.4 akukho akukho
51 ucime futhi uthukuthele, bheka 5.3.4 9 akukho
52 ucime futhi uthukuthele, bheka 5.3.4 9 8.3
53 ucime futhi uthukuthele, bheka 5.3.4 akukho 8.3

Ukunakwa okukhethekile kufanele kukhokhwe ekushiseni kwesevisi okulindelekile lapho kukhethwa isigaba sezinto ezifanele.Bheka imininingwane ye-ASTM A20/A20M.

I-ASTM A672 Ubukhulu Ububanzi

Ibanga losayizi abanconyiwe:DN≥400mm[16 in] kanye ne-WT≤75mm[3 in].

Kwabanye osayizi bepayipi, inqobo nje uma ihlangabezana nazo zonke ezinye izidingo zalokhu kucaciswa, ingasetshenziswa futhi.

Izinyathelo Zokushisela

Ama-seams kufanele ashiselwe kabili, angene ngokugcwele.

Ama-welds azokwenziwa ngesandla noma ngokuzenzakalelayo ngenqubo kagesi efaka ukufakwa kwensimbi yokugcwalisa.

Ama-welds angase ahlolwe kusetshenziswa i-radiography futhi kufanele alandele izinhlinzeko eziseSigabeni VII UW-51 se-ASME Boiler kanye Nekhodi Yomkhumbi Wokucindezela.

Ubude be-weld akumele budlule ku-3 mm [1/8 in].

Ukwelashwa Kokushisa

Wonke amakilasi ngaphandle kuka-10, 11, 12, no-13 azophathwa ukushisa esithandweni okulawulwayo kuye ku-±25 °F[± 15°C]:

Amakilasi 20, 21, 22, kanye nama-23

Ipayipi kufanele lishise ngendlela efanayo phakathi kwezinga lokushisa langemva kokushiselwa eliboniswe kuThebula 2 okungenani libe yi-1 h/in.[0.4 h/cm] ukujiya noma ihora elingu-1, kuye ngokuthi yikuphi okukhulu.

Amakilasi 30, 31, 32, kanye nama-33

Ipayipi kufanele lishiswe ngokufanayo libe izinga lokushisa ebangeni le-austenitizing futhi lingadluli izinga lokushisa eliphakeme elijwayelekile elikhonjiswe kuThebula 2 bese lipholiswa ngokulandelayo emoyeni ekamelweni lokushisa.

Amakilasi 40, 41, 42, kanye nama-43

Ipayipi kufanele lijwayele.

Ipayipi kufanele lishiselwe futhi kumazinga okushisa ashiswe kuThebula 2 njengesilinganiso esincane futhi ligcinwe ezingeni lokushisa okungenani elingu-0.5 h/in.[0.2 h/cm] logqinsi noma1/2h, noma yikuphi okukhulu, nokupholiswa ngomoya.

Amakilasi 50, 51, 52, kanye 53

Ipayipi kufanele lishise ngendlela efanayo kumazinga okushisa ngaphakathi kwebanga le-austenitizing futhi lingadluli izinga lokushisa eliphezulu lokucisha eliboniswe kuThebula 2.

Okulandelayo, cisha emanzini noma emafutheni.Ngemuva kokucisha, ipayipi izoshiswa kabusha ekushiseni okuphansi okuncane okuboniswe kuThebula 2 futhi ibanjwe lapho.

izinga lokushisa okungenani libe ngu-0,5 h/intshi ukujiya noma u-0,5 h, kuye ngokuthi iyiphi enkulu, futhi lipholile emoyeni.

I-ASTM A672 Imingcele yokwelapha ukushisa

Izingxenye Zekhemikhali

Kuyoba yisibopho somkhiqizi ukuhlola ukwakheka kwamakhemikhali epuleti kanye nama-welds ukuze ahambisane nezidingo zokucaciswa kwepuleti yezinto ezi-odiwe kanye nenqubo yokushisela yokufaka insimbi yokushisela, ngokulandelana.

Tension Test

Imvamisa yokuhlola: isifanekiso esisodwa inkatho ngayinye.

Indlela Yokuhlola: Izibonelo zokuhlola zizokwenziwa ngokuvumelana ne-QW-150 kuSigaba IX se-ASME Boiler kanye Nekhodi Yomkhumbi Wokucindezela.Ama-specimens azohlolwa ezingeni lokushisa legumbi ngokuvumelana ne-Test Methods kanye ne-Definition A370.

Ngokungeziwe KumaBanga i-Dxx, i-Hxx, i-Jxx, ne-Nxx Kumakilasi 3x, 4x, kanye nezindawo eziguqukayo ezingu-5x ze-base plate, zizonqunywa kuma-specimens asikwe epayipini elifakwe ukushisa.

Izidingo zemiphumela: Izakhiwo eziguquguqukayo eziqinile zejoyinti elishiselwe zizohlangabezana nezidingo ezincane zamandla okugcina aqinile wento yepuleti elishiwo. 

Ukuhlolwa kwe-Transverse-Guided-Weld-Bend

Inombolo yezivivinyo: Imvamisa yokuhlola: kanye ngeqeqebana ngalinye, izifanekiso ezimbili

Indlela yokuhlola: Izidingo zokuhlolwa Zezindlela Zokuhlola Nezincazelo A370, isigaba A2.5.1.7 zizohlangatshezwana nazo.

Ngokuqina kodonga ngaphezulu3/ 8phakathi. [10 mm] kodwa ngaphansi kuka3/4ngaphakathi. [19 mm] Ukuhlolwa kwe-side-bend kungase kwenziwe esikhundleni sokuhlolwa kokugoba kobuso nezimpande.

Okokuqina kwezindonga3/4phakathi. [19 mm] naphezu kwazo zombili izifanekiso zizohlolwa i-side-bend.

Izidingo zemiphumela: Ukuhlolwa kokugoba kuzokwamukeleka uma kungekho mifantu noma okunye ukukhubazeka okudlulayo1/8phakathi [3 mm] kunoma iyiphi indlela akhona ensimbi yokushisela noma phakathi kwensimbi eshiselwe nesisekelo ngemva kokugoba.

Imifantu eqhamuka emaphethelweni esampula ngesikhathi sokuhlolwa, futhi engaphansi1/4phakathi. [6 mm] kukalwa kunoma iyiphi indlela ngeke kucatshangelwe.

Ukuhlolwa Kwengcindezi

Ipayipi lamakilasi X2 kanye ne-X3 azohlolwa ngokuhambisana ne-Specification A530/A530M, Izidingo Zokuhlola I-Hydrostatic.

Ukuhlolwa kwe-Radiographic

Ubude obugcwele be-weld ngayinye ye-Class X1 ne-X2 buzohlolwa nge-radiographic ngokuhambisana futhi kuhlangabezane nezimfuneko ze-ASME Boiler ne-Pressure Vessel Code, Isigaba VIII, Isigaba UW-51.

Ukuhlolwa kwe-radiographic kungenziwa ngaphambi kokwelashwa kokushisa.

Ukubekezelelana kwe-Dimensional kwe-ASTM A672

Ezemidlalo Ukubekezelela Inani Qaphela
Ngaphandle Ububanzi ±0.5% Ngokusekelwe esilinganisweni esiyindilinga
Ngaphandle Kwe-Roundness 1%. Umehluko phakathi kwamadayamitha angaphandle amakhulu namancane
Ukuqondanisa 1/8 in. [3 mm] Kusetshenziswa unqenqema oluqondile olungamamitha angu-3 olubekwe ukuze iziphetho zombili zihlangane nepayipi
Ubukhulu 0.01 in. [0.3 mm] Ubukhulu obuncane bodonga bungaphansi kogqinsi olushiwo
Ubude 0-+0.5in [0-+13mm] iziphetho ezingashintshiwe

 

Ukubukeka kwe-ASTM A672

Ipayipi eliqediwe ngeke lingabi nasici futhi lizoba nesiphetho esifana nomsebenzi.

Izidingo ezifanayo njengokucaciswa kwe-ASTM A20/A20M kokuqedwa kwangaphezulu kwamapuleti ensimbi.

Amaphutha kanye Nokulungisa

Ukunqunywa Kwesici

Izinga le-ASTM A672 alicacisi amazinga amukelekayo okukhubazeka kanye nenqubo yokunquma yokufaka amapayipi futhi ngokuvamile ibhekisela kumazinga afanelekile wobunjiniyela nezindlela zomkhakha.

Ukukhubazeka kwangaphakathi: Ukukhubazeka kwangaphakathi kungase kuhlanganise i-porosity, slag, inclusions, njll.

Ukukhubazeka kwangaphandle: Ukukhubazeka kwangaphandle kungase kuhlanganise ukuqhekeka, ukubola, ukuklwebheka, njll.

Ukususwa ngo-Regrinding

Amaphutha angaphezulu angasuswa ngokugaya ngokweqile noma ngomshini ngogqinsi olusele olungekho ngaphansi kuka-0.3 mm ngaphansi kogqinsi olujwayelekile.

I-regrind depression kufanele ihlanganiswe ngokulinganayo endaweni ezungezile.

Ukulungisa Welding

Amaphutha kufanele asuswe ngokusika ngomshini noma okushisayo noma izindlela zokudayela futhi kulungiselelwe ukulungisa imigodi eshiselwe.

futhi ihlolwe ngemisebe ngokuhambisana ne-ASME Boiler and Pressure Vessel Code, Isigaba VIII, Isigaba UW-51.

Ubude obugcwele bepayipi elilungisiwe buzophathwa ngokushisa ngemva kokulungiswa ngokuhambisana nezidingo zebanga lamapayipi.

Ukumaka kwe-ASTM A672

Ukumaka kumele kuqukathe okulandelayo:

Isihlonzi somkhiqizi, njengophawu lokuhweba noma ilogo.

Ukucaciswa kwepayipi (usayizi, ubukhulu bodonga, njll.).

Ibanga lezinto ezibonakalayo noma uhlobo lwepayipi.Isibonelo: C60-22 (isifinyezo sebanga: C60 kanye nekilasi 22).

Izinga lokukhiqiza ipayipi yi-ASTM A672.

Idethi yokukhiqiza noma inombolo yendawo yokukhiqiza.

Ukusetshenziswa kwe-ASTM A672 Steel Pipe

Embonini yamandla kagesi, i-ASTM A672 Electric Welded Steel Pipe ijwayele ukusetshenziselwa ukudlulisa isitimu kuma-boiler systems.

Embonini yamakhemikhali, ipayipi lensimbi elishiselwe i-ASTM A672 livame ukusetshenziselwa ukuthutha amakhemikhali ahlukahlukene, i-asidi, nezixazululo ze-alkali, neminye imidiya.

Embonini kawoyela negesi, ipayipi lensimbi elishiselwe i-ASTM A672 livame ukusetshenziselwa ukuthutha uwoyela ongahluziwe, igesi yemvelo, nolunye uketshezi noma amagesi.

Ukusetshenziswa kwe-ASTM A672 Steel Pipe
Ukusetshenziswa kwe-ASTM A672 Steel Pipe

Singabakhiqizi nabahlinzeki bepayipi lensimbi yensimbi esezingeni eliphezulu abavela eChina, futhi siphinde sibe nesitoko sepayipi sensimbi esingenamthungo, sikunikeza izixazululo eziningi zamapayipi ensimbi!

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


Isikhathi sokuthumela: Apr-23-2024

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