... steel 3.Cert:ISO9001:2008,TUV2010,PED2010 ANSI Carbon steel A-105 LB2000MainMaterialStainless steel,Carbon steel,Alloy steelWN/BL/PL/SO ... /SW/THANSIANSI B16.5 B16.47 API-605,6A,6B,MSS Sp44, AWWA ... 2500#,PN0.25,PN0.6,PN1.0,PN1.6,PN2.5,PN4.0,PN6.3,PN10.0,PN16.0Mpa,PN2. ... : 1.Raw material 2.Cutting 3. Heating 4. Forging 5. Heat Treatment 6. Machining 7. Inspection