Dab tsi yog cov qauv tseem ceeb hauv tsev?
Seamless Pipes: GB / T 5310-2017 (Kev Tsim Nyog Boiler Kav)
Welded Kav Dej: GB / T 20409-2018 (welded kav rau cov khoom thermal)
Kev Xav Tau: GB / T 9948-2022 (PETROLEUM CRACKING PIPES)
Qhov muaj pes tsawg leeg yuav tsum tau ntsib GB / T 3077, thiab cov cuab yeej siv cov neeg kho tshuab yuav tsum raug kuaj raws li GB / T 228.1.
Yuav ua li cas cov qauv neeg thoob ntiaj teb (xws li ASME / ASTM) nruab nrab?
ASTM A335 P11 / P12 yog ib qib sib luag, xav tau li cas:
Tshuaj lom neeg muaj feem: P11 muaj cr 1.00% ~ 1.50%, MO 0.44% ~ 0.65%
Cov Cuab Yeej Siv Cov Neeg Kho Tshuab: Tensile Lub Zog Ntau dua lossis sib npaug rau 415 MPa, tawm ntau dua lossis muaj ntau dua lossis sib npaug rau 197 HB
Yuav tsum muaj kev xeem them cai Charpy ntxiv (ASME SA335) yuav tsum muaj.
Dab tsi yog cov kev sim ua txhaum cai?
Kev sim ultrasonic (UT): Tshawb nrhiav sab hauv stratification thiab suav nrog, raws li GB / T 5777 L2 qib.
Eddy kev sim tam sim no (li): Siv rau saum npoo degrom, qauv GB / T 7735 B qib.
Sib nqus partle kuaj (MT): chaw xyuas cov kab nrib pleb, siv NB / T 47013.4.
RadioGraphic Xeem (RT): Yuav tsum muaj cov khoom rau Welds, thiab qib II yog tsim nyog.
Yuav ua li cas ua qhov ntsuas kub ua tau zoo?
Raws li GB / T 2039, nqa tawm cov kev ntsuas siab kawg (500℃/ 10 teev ntau dua los yog sib npaug rau 145 MPa ntawm 500 MPA). Metallographic cov kev ntsuas ntsuas yog raws li DL / T 787 (spheroiding qib 1-5, tsawg dua los yog sib luag rau 3 qib tsim nyog).
Yuav ua li cas kom tau txais daim ntawv thib peb tog?
Yuav tsum:
Cov Ntawv Pov Thawj Khoom (MTC) suav nrog melting ntsuas + tiav kev tsom xam
Kev Kho Cua Sov Nkhaus Cov Ntaub Ntawv
Cov Ntawv Tshaj Qhia Tsis Yog-RT / UT)
Cov khoom siv thev naus laus zog cov khoom sib tw
Cov khoom xa tawm yuav tsum tau txais BV, SGS lossis TÜV ntawv pov thawj, thiab cov chaw muaj hluav taws xob nuclear yuav tsum ua raws li ASME NQA-1 system.
