Cov kev cai cuam tshuam hauv lub tebchawsflangetxuj "GB / T9124-2010 Kev Kho Mob rau Hlau Yeeb Nkab Flanges":

3.2.1 Rau flanges nrog nominal pressures ntawm PN2.5-PN16 Class150, tsawg carbon steel, thiab austenitic stainless hlau forgings raug tso cai los ua Class I forgings (qhov hardness yog kuaj ib thooj).

3.2.2 Yog tias cov xwm txheej hauv qab no tau ua tiav, cov forgings rau flanges yuav tsum ua tau raws li qhov yuav tsum tau ua ntawm Chav Kawm III lossis siab dua forgings (kev kuaj xyuas tensile thiab kuaj ultrasonic ib los ntawm ib qho):

1. Forgings rau flanges nrog nominal pressures ≥PN100 thiab ≥Class600;

2. Chromium-molybdenum steel forgings rau flanges nrog nominal pressures ≥PN63 thiab ≥Class300;

3. Ferrite forgings rau flanges nrog nominal siab ≥ PN25 thiab Class ≥ 300 thiab kev khiav hauj lwm kub ≤ -20 ° C.

3.2.3 Lwm cov flange forgings yuav tsum ua raws li qhov yuav tsum tau ua rau Qib II lossis siab dua forgings (chaw kuaj xyuas thiab kos duab).