Technical xav tau rauyeeb nkab flange forgings(xws liforgedthiabdov daim).
1.Qib thiab kev xav tau ntawmforgings(xws liforged thiab dov pieces) yuav tsum ua tau raws li cov cai ntawm JB4726-4728.
2.Nominal siab PN 0.25 MP 1.0 MPa carbon steel thiab austenitic stainlesshlau forgingstso cai siv cov qib Ⅰ forgings.
3.Ntxiv rau cov kev cai hauv qab no, nominal siab ntawm PN 1.6 MPa rau 6.3 MPa forgings yuav tsum ua raws li qib Ⅱ lossis siab dua qib Ⅱforgings qib.
4.Hauv ib qho ntawm cov hauv qab no yuav tsum ua raws li qhov yuav tsum tau ua ntawm Ⅲ thiabforgings: (1) nominal siab PN acuity 10.0 MPaflange forging; (2) chromium-molybdenumhlau forgingsnrog nominal siab PN> 4.0MPa; (3) ferritichlau forgingsnrog nominal siab PN> 1.6MPa thiab kev khiav hauj lwm kub ≤-20 ℃.

Qab qabvuam nrog caj dab, tiaj welding nrog caj dab, qhov (socket) vuamthiabthreaded flangefeem ntau yog ua los ntawm forging los yogforging yobtxheej txheem.Thaum steel phaj los yog seem steel siv, cov hauv qab no yuav tsum tau ua raws li:
1.Cov hlau phaj yuav tsum tau soj ntsuam los ntawm ultrasonic tsis muaj stratification defect;
2.Nws yuav tsum tau txiav mus rau hauv ib daim hlab raws li dov kev taw qhia ntawm cov hlau, thiab welded rau hauv ib lub nplhaib los ntawm dabtsi yog khoov, thiab ua rau saum npoo ntawm cov hlau ua ib lub tog raj kheej ntawm lub nplhaib.Steel daim hlau yuav tsum tsis txhob ncaj qha machined rau hauv.flanges nrog caj dab;
3.Tag nrho kev nkag mus rau weld yuav tsum tau saws rau lub pob tw weld ntawm lub nplhaib;
4.Lub pob tw weld ntawm lub nplhaib yuav tsum tau txais kev kho cua sov tom qab vuam thiab ua 100% X-ray lossis ultrasonic qhov tsis pom kev, thiab kev kuaj pom qhov tsis zoo ntawm X-ray yuav tsum ua tau raws li cov chav kawm II ntawm JB4730 thiab kev kuaj xyuas qhov tsis zoo ultrasonic yuav tsum ua tau raws li cov chav kawm I. cov cai ntawm JB4730.