... .Certification:ISO9001:2008,TUV 2010, PED20 4145H WN Flange:1.Type:Alloy flange2.Material:Alloy steel3.Certification:ISO9001 ... Carbon steel,Alloy steelWN/BL/PL/SO/SW/THANSIANSI B16.5 B16.47 API-605,6A,6B,MSS Sp44, AWWA S207DINDIN2527 ... PN0.25,PN0.6,PN1.0,PN1.6,PN2.5,PN4.0,PN6.3,PN10.0,PN16.0Mpa, ... Material 2.Material Sectioning 3. Heating 4. Forging 5. Heat Treatment 6.Cutting7. Inspection 4145H WN Flange