ASTM A501 Qib Byog cov yeeb nkab carbon steel uas kub thiab vuam thiab tsis muaj qhov sib txuas nrog lub zog tensile tsawg kawg nkaus ntawm 448 MPa (65,000 psi) rau ntau yam kev siv qauv.
ASTM A501yog rau kev tsim thiab kev ua haujlwm ntawm cov kav hlau carbon uas tau tsim los ntawm cov hlau kub thiab tsis muaj qhov sib txuas rau cov qauv siv.
Cov kav hlau no tuaj yeem yog xim dub (tsis muaj txheej) lossis kub-dipped galvanized, qhov kawg uas tau ua rau muaj kev tiv thaiv corrosion ntau ntxiv los ntawm cov txheej txheem galvanizing, ua rau nws haum rau ntau yam kev mob ib puag ncig.
Cov kav hlau no siv dav hauv cov choj, cov tsev, thiab ntau lwm yam kev siv dav dav.
ASTM A501 faib cov yeeb nkab hlau ua peb qib,qib A, qib B, thiab qib C.
Qib B yog qhov siv dav tshaj plaws ntawm peb qib vim nws muab cov khoom zoo sib npaug rau ntau yam kev siv qauv.
Cov hlau yuav tsum ua los ntawmcov txheej txheem ua hlau los ntawm cov pa oxygen yooj yim lossis cov cua sov hluav taws xob arc.
Cov hlau tuaj yeem raug pov rau hauv cov ingots lossis tej zaum yuav raug cam khwb cia.
Thaum cov hlau ntawm ntau qib sib txawv raug pov rau hauv cov hlau sib txawv, tus neeg tsim cov hlau yuav tsum txheeb xyuas cov khoom siv hloov pauv thiab tshem tawm nws siv cov txheej txheem uas tau teeb tsa uas sib cais cov qib sib txawv.
Cov kav dej yuav tsum ua los ntawm ib qho ntawm cov txheej txheem hauv qab no:tsis muaj qhov tsis sib xws; lub cub tawg-taub-welding (kev vuam tas mus li); hluav taws xob tsis kam vuam (ERW) lossis submerged arc vuam (SAW)ua raws li kev rov ua kom sov thoob plaws hauv seem thiab kub tsim los ntawm kev txo lossis ua kom zoo nkauj, lossis ob qho tib si.
Cov txheej txheem SAW welding yog muab faib uaLSAW(SAWL) thiab SSAW (HSAW).
Qhov kev tsim cov duab kawg yuav tsum ua los ntawm cov txheej txheem kub.
Yuav tsum tau ntxiv kev kho cua sov rau cov raj uas muaj phab ntsa tuab dua 13 hli [1/2 nti].
| ASTM A501 Qib B Cov Kev Cai Tshuaj,% | |||
| Kev sau ua ke | Qib B | ||
| Kev Tshawb Fawb Kub | Kev Tshawb Fawb Txog Khoom | ||
| C (Cov pa roj carbon)B | siab tshaj plaws | 0.22 | 0.26 |
| Mn (Manganese)B | siab tshaj plaws | 1.40 | 1.45 |
| P (Phosphorus) | siab tshaj plaws | 0.030 | 0.040 |
| S (Sulfur) | siab tshaj plaws | 0.020 | 0.030 |
| Cu (Tooj liab)B (thaum tooj liab hlau tau teev tseg) | feeb | 0.20 | 0.18 |
| BRau txhua qhov kev txo qis ntawm 0.01 feem pua qis dua qhov siab tshaj plaws rau cov pa roj carbon, kev nce ntawm 0.06 feem pua ntawm qhov siab tshaj plaws rau manganese raug tso cai, txog li qhov siab tshaj plaws ntawm 1.60% los ntawm kev tshuaj xyuas cua sov thiab 1.65% los ntawm kev tshuaj xyuas khoom. | |||
Kev tshuaj xyuas cov khoom yuav tsum tau ua los ntawm kev siv cov qauv kuaj uas coj los ntawm ob qhov ntev ntawm cov kav dej los ntawm txhua qhov ntau ntawm 500 qhov ntev, lossis ib feem ntawm nws, lossis ob daim ntawm cov khoom lag luam tiaj tiaj los ntawm txhua qhov ntau ntawm cov khoom lag luam tiaj tiaj.
Cov qauv tensile yuav tsum ua raws li cov kev cai ntawm Cov Txheej Txheem Xeem thiab Cov Lus Txhais A370, Appendix A2.
| ASTM A501 Qib B Cov Kev Xav Tau Tensile | |||
| Daim Ntawv Teev Npe | Phab ntsa tuab mm [hauv] | Qib B | |
| Lub zog tensile, feeb, psi[MPa] | Tag nrho | 65000 [448] | |
| Lub zog tawm los, feeb, psi[MPa] | ≤25 [1] | 46,000 [315] | |
| >25 [1] thiab ≤ 50 [2] | 45,000 [310] | ||
| >50 [2] thiab ≤ 76 [3] | 42,500 [290] | ||
| >76 [3] thiab ≤ 100 [4] | 40,000 [280] | ||
| Kev ntev, feeb, % | — | 24 | |
| Lub zog cuam tshuam | feeb,nruab nrab, ft/Ibf [J] | — | 20 [27] |
| feeb,ib leeg xwb, ft/Ibf [J] | — | 14 [19] | |
Cov qauv kuaj kev nruj yuav tsum yog cov qauv kuaj ntev puv lossis cov qauv kuaj kab ntev.
Rau cov kav dej welded, txhua qhov kev sim kab ntev yuav tsum tau coj los ntawm qhov chaw tsawg kawg 90 ° ntawm qhov vuam thiab yuav tsum tau npaj yam tsis muaj kev tiaj tus hauv qhov ntev ntawm lub ntsuas.
Kev xeem kab ntevcov qauv yuav tsum tau tshem tawm tag nrho cov burrs.
Cov qauv kuaj kev nruj yuav tsum tsis txhob muaj qhov tsis zoo ntawm qhov chaw uas yuav cuam tshuam rau kev txiav txim siab zoo ntawm cov khoom tensile.
Phab ntsa tuab ≤ 6.3 hli [0.25in] tsis tas yuav kuaj qhov cuam tshuam.
| ASTM A501 Kev Ntsuas Kev Ntsuas | ||
| Daim Ntawv Teev Npe | qhov dav | Lus Cim |
| Txoj kab uas hla sab nraud (OD) | ≤48 hli (1.9 nti) | ±0.5 hli [1/48 nti] |
| > 50 hli (2 nti) | ± 1% | |
| Phab ntsa tuab (T) | Qhov tuab ntawm phab ntsa uas tau teev tseg | ≥90% |
| Qhov hnyav | qhov hnyav teev tseg | 96.5% -110% |
| Ntev (L) | ≤7m (22 ft) | -6 hli (1/4 nti) - +13 hli (1/2 nti) |
| 7-14m (22-44 ft) | -6 hli (1/4 nti) - +19 hli (3/4) | |
| Kev Ncaj Ncees | Qhov ntev yog nyob rau hauv imperial units (ft) | L/40 |
| Cov chav ntev yog metric (m) | L/50 | |
Cov kav dej yuav tsum tsis muaj qhov tsis zoo thiab yuav tsum muaj qhov tiav du uas yog los ntawm cov txheej txheem tsim khoom kub dov.
Thaum qhov tob ntawm cov qhov tsis zoo ntawm qhov chaw ntawm cov yeeb nkab tshaj 10% ntawm qhov tuab ntawm phab ntsa nominal, cov qhov tsis zoo no yuav raug suav hais tias tsis ua raws li txoj cai. Kev kho los ntawm kev vuam yuav tsum tau tso cai tsuas yog thaum pom zoo ntawm tus neeg yuav khoom thiab tus neeg tsim khoom. Ua ntej kho los ntawm kev vuam, cov qhov tsis zoo uas yuav tsum tau kho yuav tsum tau tshem tawm tag nrho los ntawm kev txiav lossis sib tsoo.
Rau cov yeeb nkab uas yuav tsum tau kub-dip galvanized, cov txheej no yuav tsum ua raws li cov kev cai ntawm SpecificationASTM A53.
Txhua qhov ntev ntawm cov kav dej qauv yuav tsum tau cim los ntawm ib txoj kev tsim nyog, xws li dov, stamping, stamping, lossis pleev xim.
Daim ntawv cim ASTM A501 yuav tsum muaj cov ntaub ntawv hauv qab no tsawg kawg nkaus:
Lub npe ntawm tus neeg tsim khoom
Hom lag luam lossis cov cim lag luam
Loj
Lub npe ntawm tus qauv (xyoo ntawm kev tshaj tawm tsis tas yuav tsum muaj)
Qib
Rau cov kav hlau uas muaj qhov loj tshaj 50 hli [2 nti] OD, nws raug tso cai rau cim cov ntaub ntawv hlau ntawm daim ntawv lo uas txuas rau txhua pob.
ASTM A501 Qib B hlau sib xyaw ua ke lub zog thiab ductility nrog cov txheej txheem tsim khoom kub, ua rau nws haum rau ntau yam kev siv qauv.
Kev tsim kho thiab kev tsim khoFeem ntau siv rau hauv kev tsim kho thiab kev siv cov khoom siv uas xav tau lub zog siab thiab ruaj khov. Qhov no suav nrog cov tsev, chaw ua si nawv, choj, thiab lwm yam qauv.
Cov Chaw Lag LuamVim nws muaj zog heev, nws tsim nyog siv rau hauv cov chaw ua haujlwm xws li cov chaw tsim khoom thiab cov tsev rau khoom uas qhov kev ua kom ruaj khov yog qhov tseem ceeb.
Kev thauj mus los hauv paus: qib no yog siv rau hauv kev tsim cov khoom siv thauj mus los, suav nrog cov chaw nres tsheb ciav hlau, tshav dav hlau, thiab cov kev hla kev loj.
Cov Cheebtsam Tsim Kho: Nws kuj tseem siv rau hauv kev tsim cov khoom siv xws li kem, beams, thiab trusses, uas tsim cov qauv ntawm ntau yam qauv.
Kev tsim khoom sivHauv kev tsim cov khoom siv hnyav thiab tshuab, nws tuaj yeem siv rau cov khoom uas xav tau cov khoom siv muaj zog siab.
Tus neeg tsim khoom yuav tsum muab daim ntawv pov thawj ua raws li tus neeg yuav khoom uas qhia tias cov khoom tau raug kuaj, sim, thiab tshuaj xyuas raws li cov lus qhia no thiab lwm yam kev cai uas tau teev tseg hauv daim ntawv xaj yuav khoom lossis daim ntawv cog lus thiab tias txhua yam kev cai ntawd tau ua tiav. Daim ntawv pov thawj ua raws li tus lej tshwj xeeb thiab xyoo uas tau muab tawm.
Botop Steel yog cov chaw tsim khoom zoo Welded Carbon Steel Pipe thiab cov neeg muag khoom los ntawm Tuam Tshoj, kuj yog cov chaw muag khoom yeeb nkab hlau seamless.
Botop Steel muaj kev cog lus ruaj khov rau qhov zoo thiab siv cov kev tswj hwm thiab kev sim nruj komxyuas kom cov khoom muaj kev ntseeg siab. Nws pab neeg muaj kev paub dhau los muab cov kev daws teeb meem rau tus kheej thiab kev txhawb nqa los ntawm cov kws tshaj lij, nrog rau kev tsom mus rau kev txaus siab ntawm cov neeg siv khoom. Peb tos ntsoov yuav ua haujlwm nrog koj.
