Ndokwa ndị dị mkpa na mbaflangeỌkọlọtọ “GB/T9124-2010 Ọnọdụ nka maka ígwè ọkpọkọ flanges”:

3.2.1 N'ihi na flanges na nominal mgbali nke PN2.5-PN16 Class150, obere carbon ígwè, na austenitic igwe anaghị agba nchara forgings na-ekwe ka Klas I forgings (ike na-anwale ibe site ibe).

3.2.2 Ọ bụrụ na ezute ọnọdụ ndị a, forgings maka flanges ga-emezu ihe achọrọ nke Klas III ma ọ bụ n'elu forgings (nleba anya tensile na ultrasonic ule otu otu):

1. Forgings maka flanges na nominal mgbali ≥PN100 na ≥Class600;

2. Chromium-molybdenum ígwè forgings maka flanges na nominal mgbali ≥PN63 na ≥Class300;

3. Ferrite forgings maka flanges na nominal mgbali ≥ PN25 na Klas ≥ 300 na arụ ọrụ okpomọkụ ≤ -20 ° C.

3.2.3 Ndị ọzọ flange forgings kwesịrị ime ihe a chọrọ maka ọkwa II ma ọ bụ n'elu forgings (nyocha ntụpọ na ịbịaru).