Steel cylinders for the on-board storage of compressed natural gas as a fuel vehiclesCNG-1No.Cylinder TypeAccording to standardWorkingPressure, MPaHyd. TestPressure, MPaVolumeNominal Outer Dia.Design wall ThicknessNominal LengthNominalWeightMaterialNeckThread1CNP20-V-232AISO11439203020φ2325.5640+10 0≤26.534CrMo4W28.8225.5790+10 0≤32328850+10 0≤354341025+15 0≤40.55CNP20-V-356AISO11439203050φ3568.2708+15 0≤6034CrMo4W28.8657785+15 0≤62.7765875+15 0≤66870930+15 0≤789771015+15 0≤8310901165+15 0≤94111131415+15 0≤114121201500+15 0≤118131301625+15 0≤127141501835+15 0≤14315CNP20-V-406AISO11439203085φ4069.5920+15 0≤10234CrMo4W28.81695990+15 0≤108171001050+15 0≤113181101130+15 0≤120191201220+15 0≤127201301310+15 0≤136211451430+15 0≤148221501480+15 0≤152