Description of  forged gost steel flange (GOST12820-80)


* Size: 1/2” to 60”, DN 12mm to DN 2000mm
* Pressure class: Class 150 to Class 2,500, PN 2.5 to PN 250
* Facing: RF / RTJ
* Material:
Cabon steel: A105, A350 LF2, C22.8, S355JR
Stainless steel: A182 F304/F304L/F316/F316L/F321
Alloy steel: F11, F12
* Packing: plywood case and plywood pallet

* Facing Method:rust preventing oil ,paint ,electric galvanized ,hot treatment 

* Certification:ISO,TUV,AD

Applications range:petroleum, smelting, foodstuff, power, papermaking, chemical,   medical  equipment, aviation,  boiler heat exchanger, other

 * Type:WN ,SO

Other Detailed Product Information

Country Standard Standard Code Type Nominal pipe size Pressure rating




ANSI B16.5 WN,SW,SO,BL,THR,RTJ 1/2”-24” Class150.300.400.600.900.2500.
ASME B16.47 SeriesA(MSS SP-44) WN,BL 26”-60” Class150.300.400.600.900
ASME B16.47 SeriesB (API 605) WN,BL 26”-60” Class75.150.300.400.600.900
BS 3293 WN,SO 26”-48” Class150.300.400.600.
ANSI B 16.36 Orifice Flange WN,SO,THR,RTJ 1/2”-24” Class150.300.400.600.900 .1500
ANSI B 16.5 LWN 1/2”-24” Class150.300.400.600.900 .2500
AWWA C 207flange Ring(Hub)flange 3”-144” Class B.D.E.F
 British Standard BS4504 WN,SO,PL,BL DN10-DN2000 PN6,10,16,25,40
EuropeStandard EN1092 WN,SO,BL,PL DN10-DN4000 PN2,5,6,
Russian Standard GOST12820-80 WN,SO DN10-DN1200 PN6.
Japan standard JIS B2220/KS PL,SO,WN DN10—DN1000 5K,10K,16K,20K,30K
Italy standard UNI WN,PL,BL SO DN10—DN2000 PN2.