Cov Lus Qhia Txog Lub Rooj Vag Rau Kev Lag Luam Txhua Lub Limtiam (2025): Lub Cev Rooj Vag

Vim li cas qhov no thiaj tseem ceeb: Kev hloov pauv thiab kev tsim kho tshiab sib tshooj, ua kom muaj peev xwm ntawm cov chaw tsim khoom / forges, kev siv tshuab loj, thiab cov chaw kuaj mob sab nraud nruj dua. Ib qho huv si kev kho kom ruaj khov ua ntej PO tseem yog qhov ceev tshaj plaws rau kev xa khoom raws sijhawm.

Kev tshuaj xyuas kev ua lag luam

• Muaj peev xwm nruj rau kev casting/forging qhov, kev ua haujlwm raug, thiab EN 10204 3.2 pom.

• Xauv lub scope thaum ntxov kom tsis txhob rov ua dua; kev khov ib zaug feem ntau txuag tau 1-3 lub lis piam.

Cov khoom siv (haum rau kev siv)

• A105/qis-alloy: txhim khu kev qha rau kev pabcuam dav dav, kev siv tshuab zoo.

• 304/316L: dej/chlorides me me; 316L muaj cov npoo xeb zoo dua.

• CF8/CF8M lub cev cam khwb cia: ua kom muaj qhov geometry nyuaj ntawm lub valve; nce kev pab them nqi NDE.

• Ob chav 2205: chlorides + lub zog; xyuas kom meej tias kev kho cua sov/theem sib npaug.

• Kub qis/qaub: qhia txog cov nqi cuam tshuam thiab ISO 15156 / NACE MR0175lub hau hardness.

Cov qauv (hais cov kab lus, tsis yog cov lus hais)

Sau cov ntawv thiab cov kab lus rau ASME B16.34, API 600/602/6D, ISO 15156, ISO 15848, thiab EN 10204 (3.1/3.2). Muab ib daim ntawv teev cov lus zam, cov ntsiab lus tim khawv, thiab cov khoom xa tuaj (MTC, HT, NDE, hydro/air, PMI, qhov ntev).

Kev Tsim Khoom & NDE

• Flow: preform → datums → cov yam ntxwv tseem ceeb → tiav → xeem.

• Tswj qhov chaw ntawm lub rooj zaum/coaxiality, qhov perpendicularity ntawm lub rooj vag channel, qhov tiaj tus ntawm lub ntsej muag qhia.

• NDE: UT/RT (volumetric), MT/PT (nto), PMI (kev tswj kev sib xyaw); sau ntawv mus kuaj mob ua ntej.

• Siv FAI los khov cov ntaub ntawv teev cia, kev kam rau siab, thiab cov txheej txheem ntsuas.

Kev ntsuam xyuas siab thiab xau

Txhais kev sim tshuaj, kub, thiab tuav lub sijhawm rau hydro. Xyuas kom tseeb ob txoj kev kev ntsuam xyuas lub rooj zaum/qhov xau. Khaws cov ntaub ntawv tag nrho (cov lej ntsuas, cov xwm txheej, kev soj ntsuam), tsis yog "PASS" xwb.

Daim ntawv txuas PO (daim ntawv teev npe me me 10-point)

1. Lub ntsej muag rau lub ntsej muag; flange; sealing ntsej muag (RF / RTJ)

2. Cov khoom siv qib + lub xeev kho cua sov

3. NDE scope; txoj kev npaj ua tim khawv; EN 10204 theem

4. Kev kam rau siab (coaxiality / perpendicularity / roughness)

5. Ntsuas nruab nrab/kub/tuav lub sijhawm; chav kawm xau

6. Cov ntsiab lus ntawm kev cim/kev taug qab

7. Txoj kev npaj tiv thaiv nto

8. Cov ntaub ntawv pob (MTC, HT, NDE, hydro/air, qhov ntev, CoC)

9. Kev Ntim Khoom/Incoterms

10. Cov ntsiab lus tseem ceeb (preform, FAI, witness, hydro, lub qhov rais nkoj)

Cov lus qhia tseem ceeb: Cov lus qhia meej ntawm lub valve, kev ua tim khawv rau cov kauj ruam uas hloov tsis tau, thiab txoj kev tseem ceeb pob tshab ua rau lub cev valve qhov kev pab cuam kwv yees tau - qhov zoo, kev ua raws li txoj cai, thiab raws sijhawm.