1. Q: Dab tsi yog daim ntawv thov ntawm ASTM A139 steel yeeb nkab?
A:ASTM A139 steel yeeb nkab feem ntau yog siv rau kev xa dej. Nws yog ib qho kev qhia tshwj xeeb rau hluav taws xob - fusion (arc) -welded steel yeeb nkab hauv qhov ntau thiab tsawg NPS 4 thiab siab dua, haum rau siab - cov tshuab xa dej siab thiab lwm yam kev siv tseem ceeb.
2. Q: Cov txheej txheem vuam siv li cas los tsim cov yeeb nkab A139?
A:A139 yeeb nkab yog tsim los siv hluav taws xob - fusion- txheej txheem vuam. Qhov no suav nrog kev tsim cov yeeb nkab los ntawm steel phaj los yog daim ntawv thiab tom qab ntawd welding lub longitudinal seam siv lub tshuab hluav taws xob arc vuam txheej txheem yam tsis muaj qhov sib ntxiv ntawm cov hlau.
3. Q: Dab tsi yog cov qib ntawm cov hlau siv hauv A139 yeeb nkab?
A:Tus qauv qhia ntau qib raws li qhov tsawg kawg nkaus tensile lub zog, nrog Qib A (48 ksi lossis 330 MPa min) thiab Qib B (60 ksi lossis 415 MPa min) yog qhov ntau tshaj. Qib C (75 ksi min) thiab Qib D (70 ksi min) kuj muaj rau cov kev xav tau siab dua.
4. Q: Puas yog A139 yeeb nkab xav tau kev ntsuas siab?
A:Yog, nws yog qhov yuav tsum tau ua. Txhua qhov ntev ntawm A139 yeeb nkab yuav tsum tau ua qhov tsis yog -kev ntsuas hluav taws xob puas tsuaj lossis kev sim hydrostatic. Qhov ntsuas hydrostatic siab yog xam raws li cov yeeb nkab phab ntsa tuab thiab qib, kom ntseeg tau tias nws tuaj yeem tiv taus qhov tseem ceeb hauv siab.
5. Q: Dab tsi yog qhov kev xa khoom zoo rau A139 yeeb nkab?
A:A139 yeeb nkab feem ntau yog muab nyob rau hauv raws li -welded mob, tsis muaj kev tshaj tawm -weld cua sov kho. Txawm li cas los xij, kev kho cua sov tuaj yeem raug teev los ntawm tus neeg yuav khoom yog tias xav tau rau daim ntawv thov tshwj xeeb los daws kev ntxhov siab lossis txhim kho cov khoom.
