... in water liter. Manufacturing standards:GB5099,DOT-3AA,EN1964-1,ISO9809,Q/JB Seamless steel cylinder’s has reliable quality ,clear stamping ... can produce large, medium, small sizes high pressure seamless cylinders which range from 8-35Mpa in working pressure ... Standard:GB5099,ISO9809-1,DOT-3AA,EN1964-1,Q/JB THB008We also offer the valve aplly in the different steel cylinders 37Mn seamless steel cylinder ...