ASTM-335 thiabSA-355 MTxheem Specification rau Seamless Ferritic Alloy-Steel Pipe rau Kev Pabcuam Kub Kub.
belongs rau Boiler thiab Pressure Vessel Code.
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Daim ntawv xaj yuav tsum suav nrog 11 yam hauv qab no:
1. Quantity (ko taw, meters lossis tus pas nrig)
2. Khoom npe (seamless alloy steel nominal yeeb nkab)
3. Qib (16 hauv tag nrho: P1, P2, P22, P11, P22, P91)
4. Txoj kev tsim khoom (kub tiav lossis kos duab txias)
5. Siv ib qho ntawm cov lus qhia hauv qab no: 1), NPS thiab cov yeeb nkab phab ntsa thickness serial tooj, 2), sab nraud txoj kab uas hla thiab nominal phab ntsa thickness, 3), txheej kab thiab qhov tsawg kawg nkaus phab ntsa thickness, 4), puab txoj kab uas hla thiab nominal phab ntsa thickness, 5), puab txoj kab uas hla thiab yam tsawg kawg nkaus phab ntsa thickness ordering cov lus qhia
6. Length (sib faib ua qhov ntev thiab ntev indefinite)
7. Kev ua tiav tiav.
8. Cov kev cai xaiv (dej siab thiab tso cai sib txawv).
9. Cov ntaub ntawv xeem yuav tsum tau (saib A530).
10. Tus lej txheem. 11 Cov kev cai tshwj xeeb lossis lwm yam kev xav tau ntxiv.
Khoom siv thiab kev tsim khoom
1. Cov kav dej nominal tuaj yeem ua tiav kub lossis txias txias, thiab tau ua tiav qhov kev kho cua sov kawg uas yuav tsum tau ua los ntawm tus qauv.
2. P2 thiab P12 qib steel. Ob qib ntawm cov hlau no yuav tsum tau tsim los ntawm cov txheej txheem coarse grain melting. Yog tias muaj cov kev cai tshwj xeeb rau cov nplej loj lossis cov txheej txheem deoxidation, lawv yuav tsum tau pom zoo los ntawm cov neeg yuav khoom thiab cov chaw tsim khoom steel.
3. Kev kho cua sov
1. Tsuas yog PSC, P23, P91, P92, P122 thiab P911 qib steel thiab raws li tau teev tseg, tag nrho cov qib ntawm cov kav dej nominal yuav tsum tau rov ua dua thiab muab tso rau hauv lub siab annealed, isothermal annealed lossis normalized thiab tempered xeev. Yog hais tias muab nyob rau hauv lub normalized thiab tempered lub xeev, qhov tsawg kawg nkaus tempering kub rau P5, P5B, P9, P21 thiab P22 qib steel yuav tsum yog 675 ° C. Qhov tsawg kawg nkaus tempering kub rau P1, P2, P11, P12 thiab P15 qib steel yuav tsum yog 650 ℃
2. Kev kho cua sov kawg ntawm P92 thiab P911 qib steel yuav tsum normalizing qhov tsawg kawg nkaus ntawm 1040 ℃ thiab tempering ntawm qhov tsawg kawg nkaus ntawm 730 ℃.