Nka na ụzụ chọrọ makaọkpọkọ flange forgings(gụnyereemegoronaakpọrepu iberibe).
1.The ọkwa na teknuzu chọrọ nkeforgings(gụnyereakpụkpu na akpọrepu iberibe) ga-emezu ihe ndị kwekọrọ chọrọ nke JB4726-4728.
2.Nrụgide aha PN 0.25 MP 1.0 MPa carbon steel na austenitic igwe anaghị agba ncharaígwè forgingskwere ka ojiji nke larịị Ⅰ forgings.
3.Na mgbakwunye na ndokwa ndị a, nrụgide ọnụ nke PN 1.6 MPa ruo 6.3 MPa forgings ga-adaba na ọkwa Ⅱ ma ọ bụ karịa ọkwa Ⅱforgings etoju.
4.N'ime otu n'ime ihe ndị a kwesịrị ịkwado ihe achọrọ nke Ⅲ naforgings: (1) nrụgide n'ọnụ PN acuity 10.0 MPaflange na-akpụ akpụ(2) chromium-molybdenumígwè forgingsna nrụgide ọnụ ala PN> 4.0MPa; (3) ferriticígwè forgingsna nominal mgbali PN> 1.6MPa na arụ ọrụ okpomọkụ ≤-20 ℃.

Buttịgbado ọkụ na olu, ewepụghị ịgbado ọkụ na olu, oghere ịgbado ọkụnaeriri eriria na-emekarị site n'ịgba ma ọ bụna-akpụ akpụusoro.Mgbe a na-eji efere ígwè ma ọ bụ nchara ngalaba, ihe ndị a chọrọ ga-emezurịrị:
1.A ga-enyocha efere ígwè ahụ site na ultrasonic na-enweghị ntụpọ stratification;
2.A ga-egbutu ya n'ime ibe n'akụkụ ntụgharị ntụgharị nke ígwè ahụ, na-agbanye ya na mgbanaka site na-ehulata, ma mee ka elu nke ígwè ahụ ghọọ cylinder nke mgbanaka ahụ.flanges na olu;
3.A ga-anakwere weld penetration zuru oke maka mgbanaka butt nke mgbanaka ahụ;
4.Weld weld nke mgbanaka ahụ ga-enweta ọgwụgwọ okpomọkụ post-weld ma mee nchọpụta 100% X-ray ma ọ bụ ultrasonic flaw, na nchọpụta X-ray ga-ezute ihe achọrọ klas II nke JB4730 na nchọpụta ultrasonic flaw ga-ezute klas I. Ihe achọrọ maka JB4730