9 10 11 12 13 PART 73-PROHIBITED LOADING, STORAGE, AND STOWAGE CHART Section 73.0 Prohibited loading, storage, and stowage chart. Low explosives or black powder High explosives nitrophenol, or wet lead azide Wet fulminate of mercury, wet diazodi (including electric blasting caps) 1 Blasting caps, with or without safety fuse Ammunition for cannon with explosive projectiles, gas projectiles, smoke projectiles or incendiary projectiles, ammuni tion for small arms with explosive bullets Explosive projectiles, bombs, torpedoes, or mines; rifle or hand grenades (explosive) Ammunition for cannon with empty, sand loaded or solid projectiles, or without Detonating fuzes, boosters (explosive) projectiles Smokeless powder for cannon or smokeless Fireworks powder for small arms Primers for cannon or small arms, empty cartridge bags-black powder igniters, empty cartridge shells, primed; empty grenades, primed; combination primers or percussion caps Small arms ammunition Percussion fuzes or tracer fuzes Time or combination fuzes ers, fuse igniters, delay electric igniters, Cordeau detonant, safety squibs, fuse lightelectric squibs, or instantaneous fuse Inflammable liquids or compressed inflam mable gases, red label yellow label Inflammable solids or oxidizing materials, abel Acids or corrosive liquids, white lab able gases, green Compressed non-inflammab Poisonous label or liquids, in cylinders, poison gas label gases or The following table shows the explosives and other The letter X at an intersection of horizontal and X X X X X X X 1 Blasting caps or electric blasting caps in quantity not exceeding 1,000 caps may be loaded, stowed, or stored with all articles above named, except those in columns b, c, e and f. Low explosives or a Black powder X High explosives b X X Wet fulminate of mercury, wet diazodinitrophenol, or wet lead azide C XX X X Dangerous explosives Page 893 X Section 73.0 Prohibited loading, storage, and stowage chart-Continued. column. loaded or stored with High explosives (b) vertical Blasting caps (d) horizontal column must not be not be loaded or stored together, for example: vertical columns shows that these packages must The letter X at an intersection of horizontal and stored together. dangerous articles which must not be loaded or The following table shows the explosives and other Page 894 Less dangerous explosives without projectiles sand loaded or solid projectiles, or Ammunition for cannon with empty, smokeless powder for small arms Smokeless powder for cannon or Fireworks. Small arms ammunition.. combination primers or percussion caps Percussion fuzes or Tracer fuzes Time or combination fuzes Relatively safe explosives X XX 10 X X X 3 جر 5 6 7 8 9 10 11 12 13 8 X 9 XXX X X X X X X X X Acids or corrosive liquids, white label.. 11 XXX X X X XXX X X (Secs. 232-236, 41 Stat. 1444, 1445; 18 U.S.C. 382-386) [Regs. for transportation of explosives, etc., Part I, sec. 5, I.C.C., May 12, 1930, effective Oct. 1, 1930, as amended Apr. 7, 1931, Mar. 12, 1936, 1 F.R. 48] Cordeau detonant, safety squibs, fuse Inflammable liquids or compressed in flammable gases, red label Inflammable solids or oxidizing ma terials, yellow label Compressed non-inflammable gases, green label poison gas label Other dangerous articles 2 Unless loaded in opposite ends of car, acids must not be loaded with yellow label articles, ammunition for cannon with or without projectiles, or smokeless powder. NOTE.---Charged electric storage batteries must not be loaded in the same car with dangerous explosives. Page 895 PART 74—VAPOR PRESSURE OF NATURAL GASOLINE: Sec. TESTING PROCEDURE Sec. Standard procedure for determin- 74.4 Water bath. ing the vapor pressure of natural gasoline (Reid method) 74.1 Scope. Apparatus 74.2 Vapor-pressure bomb. 74.3 Pressure gage. 74.5 Connections. Procedure 74.6 Filling the gasoline chamber. 74.7 Test. 74.8 Calculations. 74.9 Accuracy. CROSS REFERENCES Certificates of clearance issued by the Petroleum Conservation Division, Department of the Interior, for movements of petroleum and petroleum products in interstate commerce: See Mineral Resources, 30 CFR Part 402. Regulations of the Bureau of Mines requiring containers for helium to conform to shipping containers specified by the Interstate Commerce Commission: See Mineral Resources, 30 CFR 1.2 (g). STANDARD PROCEDURE FOR DETERMINING THE VAPOR PRESSURE OF NATURAL GASOLINE (REID METHOD) Section 74.1 Scope. This method is intended primarily for the determination of vapor pressures of natural gasoline, but is also applicable to other inflammable liquids when and as specified in the regulations in Parts 80–85.*† *§§ 74.1 to 74.9, inclusive, issued under the authority contained in secs. 232-236, 41 Stat. 1444, 1445; 18 U.S.C. 382-386. †In §§ 74.1 to 74.9, inclusive, the numbers to the right of the decimal point correspond with the respective section numbers in Part IV, Appendix 1 to packing requirements, Interstate Commerce Commission, May 12, 1930, as amended Dec. 15, 1931. APPARATUS 74.2 Vapor-pressure bomb. The vapor-pressure bomb consisting of two sections or chambers, an upper section or air chamber, and a lower section or gasoline chamber, shall conform to the following requirements: (a) Air chamber. The upper section or air chamber shall be a cylindrical vessel 2 to 21 inches in diameter and 10 inches, plus or minus one-eighth inch, in length, inside dimensions. In one end of the air chamber a 1/4-inch pipe thread shall be tapped to receive the gage coupling, shown in Figure 1. Other means of connecting the air chamber with the pressure gage may be employed, provided the requirements of paragraphs (d) and (e) are fulfilled. In the other end of the air chamber an opening approximately one-half inch in diameter shall be provided for purpose of coupling with the gasoline bomb. The nature of this opening will depend upon the method of coupling employed. The air chamber must drain completely from either end when held in a vertical position and for this reason the ends may be slightly convex. Page 896 (b) Gasoline chamber for sampling materials at atmospheric pressure. The lower section of gasoline chamber, shown in Figure 1, shall be a cylindrical vessel of the same inside diameter as the air chamber and 21/2 inches, plus or minus 1/16 inch, in inside length. In one end of the gasoline chamber an opening approximately onehalf inch in diameter shall be provided for purpose of coupling with the air chamber. The nature of this opening will depend upon the method of coupling employed. The other end of the gasoline chamber shall be completely closed. The gasoline chamber must drain completely when inverted and for this reason the top may be slightly convex. (c) Gasoline chamber for sampling materials under pressure. For testing natural gasoline where it is impracticable to obtain a sample by immersing the gasoline chamber in the liquid, as for example, gasoline in pressure storage or gasoline being transported by pipe line, the gasoline chamber shall conform to the requirements specified in paragraph (b), except that a 1/4-inch needle valve shall be attached near the bottom and a 1/2-inch gate valve shall be introduced in the coupling between the chambers as illustrated in Figure 2. (d) Method of coupling air and gasoline chambers. Any method of coupling the air and gasoline chambers may be employed, for example, a simple screw union or a clamp. The sole provision in this respect is that the assembly shall be free from leaks under the conditions of test. Responsibility for freedom from leaks rests with the user. (e) Volumetric capacity of air and gasoline chambers. The ratio of the volume of the air chamber to the volume of the gasoline chamber shall be between the limits of 3.8 and 4.2. To determine the volume of the air chamber, insert a 1/4-inch plug in the gage coupling, invert the chamber, fill with water up to and including the portion of the coupling device attached permanently to the air chamber, and then carefully measure the volume of water. To determine the volume of the gasoline chamber, fill with water up to and including the portion of coupling device attached permanently to the gasoline chamber, and then carefully measure the volume of water.*† 74.3 Pressure gage. The pressure gage shall be a standard Bourdon type spring gage 411⁄2 to 511⁄2 inches in diameter. The range of the gage used shall be governed by the vapor pressure of the sample being tested, as follows: For those samples with vapor pressures not in excess of 12 pounds per square inch absolute at 100° F., the gage shall have a 15-pound scale. For those samples with vapor pressures between 12 and 45 pounds per square inch absolute 100° F., the upper limit of the scale of the gage shall not be less than 45 nor more than 60 pounds. Gages shall be checked frequently and adjusted if found in error.*† at 74.4 Water bath. The water bath shall be of such dimensions that the vapor-pressure bomb may be immersed to the bottom of the pressure gage. Means for maintaining the bath at a constant temperature of 100° F., plus or minus 0.5° F., should be provided.*† *†For statutory and source citations, see note to § 74.1. Page 897 [897] |
