Zofunikira mu dzikoflangemuyezo "GB/T9124-2010 Technical Conditions for Steel Pipe Flanges":

3.2.1 Kwa ma flanges omwe ali ndi mphamvu zodziwika bwino za PN2.5-PN16 Class150, chitsulo chochepa cha carbon, ndi zitsulo zosapanga dzimbiri za austenitic zimaloledwa kukhala Class I forgings (kuuma kumayesedwa chidutswa ndi chidutswa).

3.2.2 Ngati zotsatirazi zikwaniritsidwa, ma forgings a flanges adzakwaniritsa zofunikira za Class III kapena pamwamba pa forgings (sampling tensile inspection and ultrasonic testing one by one):

1. Forgings kwa flanges ndi mphamvu mwadzina ≥PN100 ndi ≥Class600;

2. Chromium-molybdenum forgings forgings for flanges with nominal pressures ≥PN63 and ≥Class300;

3. Ferrite forgings kwa flanges ndi kuthamanga mwadzina ≥ PN25 ndi Kalasi ≥ 300 ndi kutentha ntchito ≤ -20 ° C.

3.2.3 Zolemba zina za flange ziyenera kutsata zofunikira za Sitandade II kapena pamwamba pa forgings (kuyang'ana ndi kujambula).