... Material : Carbon Steel Grade 4.8 with Zinc Coating , Epoxy Coating or Dacromet Coating ; Or Stainless Steel upon customers request ... Rods : Carbon Steel Grade 4.8 with Zinc Coating , Epoxy Coating or Dacromet Coating ; Or Stainless Steel upon customers request ... drinking water and sewage : SBR Grade F . 7) Body Coating : Fusion Bonded Epoxy Coating inside and outside , or bitumen 8) Sizes : DN50 - ...