... flat is forged according to BS4504, material: RST37.2, C22.8, SS400. Pressure: 75bls to 2500 bls Marking: Required My factory ... 3000mm5. Pressure: 75bls to 2500 bls6. Marking: Required7. Painting: yellow, blank, clear, oil and Zn8. Inspection: in-house and the third partyCarbon ...