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High explosives Wet sulminate of mercury, wet diazodi

nitrophenol, or wet lead azide Blasting caps, with or without safety fuse

(including electric blasting caps) 1 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)

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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 1.

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Page 893

Dangerous explosives

column. stored together. 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

dangerous articles which must not be loaded or The following table shows the explosives and other

(explosive)
caps) 1

explosive bullets
High explosives
Black powder
Low explosives or
Detonating fuzes, boosters (explosive) | g

does, or mines; rifle or hand grenades i
Explosive projectiles, bombs, torpe-

ammunition for small arms with
projectiles or incendiary projectiles,
sive projectiles, gas projectiles, smoke
Ammunition for cannon with explo-

fuse (including electric blasting
Blasting caps, with or without safety

nitrophenol, or wet lead azido Wet fulminate of mercury, wet diazodi.

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Section 73.0 Prohibited loading, storage, and stowage chart.

PART 73—PROHIBITED LOADING, STORAGE, AND STOWAGE CHART

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Detonating fuzes, boosters (explosive) Ammunition for cannon with empty, sand

loaded or solid projectiles, or without projectiles Smokeless powder for cannon or smokeless

powder for small arms

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Fireworks

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Small arms ammunition Primers for cannon or small arms, empty

cartridge bags-black powder igniters, empty cartridge shells, primed; empty grenades, primed; combination primers

or percussion caps Percussion fuzes or tracer fuzes

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Time or combination fuzes

Cordeau detonant, safety squibs, fuse light

ers, fuse igniters, delay electric igniters, electric squibs, or instantaneous fuse

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Page 894

Relatively safe explosives

Loss dangerous

explosives

Tracer luzes

caps Timo or combination luzes Percussion fuzas or

combination primers or percussion primod; ompty grenados, primod; igniters, empty cartridge shells,

empty cartridge bags-black powder Primers for cannon or small arms,

Small arms ammunition.

Fireworks.

smokeless powder for small arms Smokeless powder for cannon or

without projectlles

sand loaded or solid projectiles, or Ammunition for cannon with empty,

column. stored together. 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 at an intersection of horizontal and

dangerous articles which must not be loaded or The following table shows the explosives and other

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Low explosives or black powder

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High explosives Wet fulminate of mercury, wet diazodi.

nitrophenol, or wet lead azide Blasting caps, with or without safety fuse

(including electric blasting caps) 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)

Section 73.0 Prohibited loading, storage, and stowage chart-Continued.

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Detonating luzes, boosters (explosive) Ammunition for cannon with empty, sand

loaded or solid projectiles, or without projectles Smokeless powder for cannon or smokeless

powder for small arms

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flammable gases, red label
Inflammable solids or oxidizing ma-

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terials, yellow label
Acids or corrosive liquids, white label.. 11
Compressed non-inflammable gases,

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Poisonous gases or liquids, in cylinders, 13

Cordeau detonant, safety squibs, fuse

lighters, fuse ignitors, delay electric ignitors, electric squibs, or instantaneous fuso

Inflammable liquids or compressed in

Other dangerous

articles

groen label

poison gas label

: 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.

(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]

Page 895

PART 74_VAPOR PRESSURE OF NATURAL GASOLINE:

TESTING PROCEDURE

Sec.

Sec.
Standard procedure for determin- 74.4 Water bath.
ing the vapor pressure of natural 74.5 Connections.
gasoline (Reid method)

Procedure 74.1 Scope.

74.6 Filling the gasoline chamber. Apparatus

74.7 Test. 74.2 Vapor-pressure bomb.

74.8 Calculations. 74.3 Pressure gage.

74.9 Accuracy.

CROSS REFERENCES

Certificates of clearance issued by the Petroleum Conservation Division, De

partment 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.**

*88 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.

tIn $ 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 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 14-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

convex.

(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 212 inches, plus or minus 116 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

(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 14-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 41/2 to 512 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 at 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.**

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.*+

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**For statutory and source citations, see note to $ 74.1.

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