High Quality EN Welding Neck Flanges

Material A105, A350LF2 ,A694, RST37.2 S235JR;S275JR;S355JR;S420NL;S460NL;P245GH;P250GH;P265GH;P280GH;S355GH;C45(E);42CrMo4;34CrNiMo6;080M15;etc. A182F1,A182F304,A182F304L,A182F316,A182F316L,etc. Size 1/4"-144'' ,   Dia 73mm-6500 mm Protective Coating Anti-rust Oil, Black or Yellow Painting, Hot-dip Galvanized. Process Raw material incoming test→ Cutting→ Heating→ Forging→ Heat treatment→ Rough Machining→ UT Test→ Finish Machining→ Final Inspection→ Stock & Delivery Quality Assurance System     -Certificate of Conformity of the Factory Production Control   : Hot Rolled Productes of Structural Steel  (CE)      -Managment system as per GB/T 19001-2016/ ISO 9001 : 2015  (TUV NORD)     -Managment system as per GB/T 24001-2016/ ISO 14001: 2015  (TUV NORD)     -Managment system as per OHSAS 18001 : 2007  (TUV NORD)…