Zhejiang TianEn Pressure Vessel Co., Ltd. is a professional manufacture of High pressure seamless steel cylinders, CNG cylinders, Fire-fighting cylinders,and other cylinders series. We have B1, B3 level qualifications of pressure vessel and passed ISO:9001:2000. Own the experienced in and qualified for designing and manufacturing various kinds of high pressure gas cylinders, which including CNG cylinder for vehicle, seamless steel cylinders, Fire-fighting cylinders, Fully wrapped composite cylinders and other series. widely used for transportion , fire-fighting, medical treatment, industry and so on. Out Diameter:232mm, 279mm, 325mm, 356mm,406mm water capacity:20-150l working pressure:20MPA testing pressure:30MPA certifation by BV material:34CrMo4