1. LAF is the first company designed one-piece tubular PP fabric, LAF flexitank with one-piece tubular PP fabric has passed AAR Railway Impact test, with 2G heavy dynamic impacts to the running container, flexitank was found intact without any leaking. This design is recognized as ZL 2011 2 0039469.8 patent for utility model by China State Intellectual Property Office. 2. Automatic Air Vent can automatically release air when pressure inside flexitank exceeding the set pressure limit, so as to grantee safety of flexitank during transportation. 3. The specially designed bonnet avoids contamination to flexitank caused by spillages during filling or discharging alongside the protection of valve. 4. Frame Bulkhead is in full compliance of COA and COP requirements, LAF flexitank with such bulkhead has passed AAR Railway Impact test, with 2G heavy dynamic impacts to the running container, flexitank valve no touching to container rear end, flexitank was found intact without any leaking, container panels were found with negligible deformation but in full compliance with COA requirements.