High quality spiral steel pipe,Website:http://www.ausinpipeline.com, ERW steel pipe, seamless steel pipe coated material, anti-corrosion pipe Three Polyethylene(3LPE), two polyethylene (2PE) pipe coatings for oil and gas pipes.Standard: SY/T0413-2002, DIN30670, ISO 21809-1, CSA Z245.20 etc.Process: (1) Sanding blast SA2.5 and near white metal(2) First layer FBE thickness as per standard(3) Second layer Adhesive thickness as per standard(4) Third layer Polyethylene (HDPE) thickness as per standard(5) End Cutting Beveled 30degree, cut back 20mm from end2PE/3PE Coating CharacteristicsNO.ItemProperty dataTest waytwo layethree layer1Detach strength(N/cm)20℃±5℃≥70≥100SY/T0413-200250℃±5℃≥35≥702Cleaning of the cathode(65℃,48h)(mm)≤8SY/T0413-20023Impact test(J/mm)≥8SY/T0413-20024Bending strength(2.5°-30℃±5℃)No crack of polytheneSY/T0413-20022PE/3PE Coating Thickness RequirementsN.BEpoxy powder coatingAdhesive（um）Min wall thickness of anticorrosive coating（mm）(mm)(mm)two layerthree layerusual gradestrengthen grade≤100≥801.82.5250＜DN≤250200-400170-25022.7250＜DN≤5002.22.9500＜DN≤8002.53.2DN≥80033.7