Bukatun fasaha donbututu flange forgings(ciki har daƙirƙirakumabirgima guda).
1.A sa da fasaha bukatun naƙirƙira(ciki har daƙirƙira da birgima guda) zai cika daidai buƙatun JB4726-4728.
2.Matsin lamba PN 0.25 MP 1.0 MPa carbon karfe da austenitic bakinkarfe forgingsan yarda da amfani da matakin Ⅰ ƙirƙira.
3.Baya ga tanadi masu zuwa, matsa lamba na PN 1.6 MPa zuwa 6.3 MPa ƙirƙira zai dace da matakin Ⅱ ko sama da matakin Ⅱmatakan ƙirƙira.
4.A cikin ɗayan waɗannan ya kamata ya dace da buƙatun Ⅲ daƙirƙira: (1) matsa lamba PN acuity 10.0 MPaƙirƙira flange(2) chromium-molybdenumkarfe forgingstare da matsa lamba PN> 4.0MPa; (3) ferritickarfe forgingstare da matsa lamba PN> 1.6MPa da zafin jiki na aiki ≤-20 ℃.

Buttwaldi da wuyansa, lebur waldi tare da wuyansa, soket waldikumazaren flangegabaɗaya ana yin su ta hanyar jabu koƙirƙira mirginaLokacin da aka yi amfani da farantin karfe ko sashin karfe, dole ne a cika waɗannan buƙatun:
1.Za a bincika farantin karfe ta ultrasonic ba tare da lahani ba;
2.Za a yanyanka shi cikin ɗigo tare da jujjuyawar karfe, a sanya shi cikin zobe ta lanƙwasa, sannan a sanya saman karfen ya zama Silinda na zoben.flanges tare da wuyansa;
3.Za a ɗauki cikakken walƙiyar shigar ciki don butt weld na zoben;
4.The butt weld na zobe za a sha maganin zafi bayan waldi kuma ya yi 100% X-ray ko gano lahani na ultrasonic, kuma gano lahani na X-ray zai cika buƙatun aji II na JB4730 kuma gano aibi na ultrasonic zai dace da aji I. Abubuwan da suka dace don JB4730.