NFPA 55-2020 Compressed Gases and Cryogenic Fluids Code

NFPA 55-2020 Compressed Gases and Cryogenic Fluids Code. 8.2.3 Foundations and Supports. Stationary tanks shall be provided with concrete or masonry foundations or structural steel supports on frm concrete or masonry foundations, and the requirements of 8.2.3.1 through 8.2.3.5 also shall apply. 8.2.3.1 Excessive Loads. Stationary tanks shall be supported to prevent the concentration of excessive loads on the support‐ ing portion of the shell. 8.2.3.2 Expansion and Contraction. Foundations for horizon‐ tal containers shall be constructed to accommodate expansion and contraction of the container. 8.2.3.3* Support of Ancillary Equipment. 8.2.3.3.1 Foundations shall be provided to support the weight of vaporizers or heat exchangers. 8.2.3.3.2 Foundations shall be designed to withstand soil and frost conditions as well as the anticipated seismic, snow, wind, and hydrostatic loading under operating conditions. 8.2.3.4 Temperature Effects. Where drainage systems, terrain, or surfaces beneath stationary tanks are arranged in a manner that can subject stationary tank foundations or supports to temperatures below –130°F (–90°C), the founda‐ tions or supports shall be constructed of materials that are capable of withstanding the low-temperature effects of cryo‐ genic fuid spillage. 8.2.3.5 Corrosion Protection. Portions of stationary tanks in contact with foundations or saddles shall be painted to protect against corrosion. 8.2.4 Pressure Relief Devices. 8.2.4.1 General. N 8.2.4.1.1 Where a bulk gas source system is connected to an indoor cryogenic fuid piping system protected by a pressure relief device that is designed to protect against exceeding the maximum allowable working pressure or maximum process operating pressure, releases shall be directed to a safe location outdoors to the open air. 8.2.4.1.2 Pressure relief devices shall be provided to protect containers and piping systems containing cryogenic fuids from damage due to overpressure. 8.2.4.6 Arrangement. 8.2.4.6.1 Pressure Relief Devices. Pressure relief devices shall be arranged to discharge unobstructed to the open air in such a manner as to prevent impingement of escaping gas on personnel, containers, equipment, and adjacent structures or its entrance into enclosed spaces. 8.2.4.6.2 Portable Containers with Volume Less Than 2.0 scf (0.057 Nm 3 ). 8.2.4.6.2.1 The arrangement of the discharge from pressure relief devices from DOT-specifed containers with an internal water volume of 2.0 scf (0.057 Nm 3 ) or less shall be incorpora‐ ted in the design of the container. 8.2.4.6.2.2 Additional safeguards regarding placement or arrangement shall not be required. 8.2.4.7 Shutoffs Between Pressure Relief Devices and Contain‐ ers. 8.2.4.7.1 General. Shutoff valves installed...