Pipeline and Haz. Matls. Safety Admin., DOT Where: tr is the maximum mean bulk temperature during transport, and tf is the temperature in degrees celsius of the liquid during filling. Where: tr is the maximum mean bulk temperature during transport, tf is the temperature in degrees celsius of the liquid during filling, and a is the mean coefficient of cubical expansion of the liquid between the mean temperature of the liquid during filling (tf) and the maximum mean bulk temperature during transportation (tr) both in degrees celsius. b. For liquids transported under ambient conditions a may be calculated using the formula: = d15 - d 50 35 d 50 Where: d15 and d50 are the densities (in units of mass per unit volume) of the liquid at 15 SectionC (59 SectionF) and 50 SectionC (122 SectionF), respectively. TP3 The maximum degree of filling (in %) for solids transported above their melting points and for elevated temperature liquids shall be determined by the following: Where: df and dr are the mean densities of the liquid at the mean temperature of the liquid during filling and the maximum mean bulk temperature during transport respectively. TP4 The maximum degree of filling for portable tanks must not exceed 90%. TP5 For a portable tank used for the transport of flammable refrigerated liquefied gases or refrigerated liquefied oxygen, the maximum rate at which the portable tank may be filled must not exceed the liquid flow capacity of the primary pressure relief system rated at a pressure not exceeding 120 percent of the portable tank-s design pressure. For portable tanks used for the transport of refrigerated liquefied helium and refrigerated liquefied atmospheric gas (except oxygen), the maximum rate at which the tank is filled must not exceed the liquid flow capacity of the pressure relief device rated at 130 percent of the portable tank-s design pressure. Except for a portable tank containing refrigerated liquefied helium, a portable tank shall have an outage of at least two percent below the inlet of the pressure relief device or pressure control valve, under 371 VerDate Sep<11>2014 16:41 Oct 31, 2018 Jkt 244226 PO 00000 Frm 00381 Fmt 8010 Sfmt 8010 Q:\49\49V2.TXT PC31 ER14JN05.003 - dr - -" Degree of filling = 95 - . df - - EN21JN01.009 - - 97 -" Degree of filling = 1 + t - t - . ( r f )- - - - 95 -" Degree of filling = 1 + t - t - . ( r f )- - EN21JN01.001 Code/Special Provisions TP1 The maximum degree of filling must not exceed the degree of filling determined by the following: TP2 a. The maximum degree of filling must not exceed the degree of filling determined by the following: EN21JN01.000 the - T - Code. If a frangible disc is required in series with the reclosing pressure relief device for the specified portable tank, the alternative portable tank must be fitted with a frangible disc in series with the reclosing pressure relief device; and (D) With regard to bottom openings - (1) When two effective means are specified, the alternative portable tank is fitted with bottom openings having two or three effective means of closure or no bottom openings; or (2) When three effective means are specified, the portable tank has no bottom openings or three effective means of closure; or (3) When no bottom openings are authorized, the alternative portable tank must not have bottom openings. (vi) Except when an organic peroxide is authorized under Section 173.225(g), if a hazardous material is not assigned a portable tank - T - Code, the hazardous material may not be transported in a portable tank unless approved by the Associate Administrator. (8) - TP - codes. (i) These provisions apply to the transportation of hazardous materials in IM and UN Specification portable tanks. Portable tank special provisions are assigned to certain hazardous materials to specify requirements that are in addition to those provided by the portable tank instructions or the requirements in part 178 of this subchapter. Portable tank special provisions are designated with the abbreviation TP (tank provision) and are assigned to specific hazardous materials in Column (7) of the Section 172.101 Table. (ii) The following is a list of the portable tank special provisions: Section 172.102