1 If tests are made by method involving measurement of amount of liquid forced into tank by test pressure, then the basic data on which calculations are made, such as pump factors, temperature of liquid, coefficient of compressibility of liquid, etc., must also be given. 2 Do not include protective housing, but state whether with or without valves

(c) Before a tank car is placed in service, party assembling completed car must furnish to car owner, the Bureau of Explosives, and the secretary, mechanical division, American Railway Association, a

Page 888

report in proper form, certifying that tanks and their equipment comply with all requirements of this specification, and including information as to serial numbers, dates of tests, and ownership marks on tanks mounted on car structure.* [Par. 15, as amended Jan. 13, 1932]

SHIPPING CONTAINER SPECIFICATION 108

LINED, COATED, OR TREATED WOODEN-STAVE METAL-HOOPED TANKS FOR MOUNTING ON OR TO FORM PART OF A CAR

72.108-1 Type. Tanks built under this specification may be cylindrical, elliptical, or rectangular, with flat heads inserted inside the ends of the tank in rabbets, or tied to the end of the tank and to each other by rods on the outside of the tank, and must have at least one filling and discharge opening in the top of the tank which can be securely closed. The tank must have no bottom or side openings, but may be provided with a recess cut in the bottom of the inside of the tank not over 12 inches in diameter and 1 inch deep to form a well or sump to facilitate unloading.*+ [Par. 1]

72.108-2 Bursting strength. Not specified.*† [Par. 2]

72.108-3 Material. All tank staves and heads must be made of a good grade of well-dried tank lumber of a minimum thickness of 3 inches, stock size, as free from shakes and knots as possible. Lumber used for closure of filling and discharge openings and tank covers may be of 2-inch, stock size. Tank hoops and tie-rods must be made of suitable metal. Metal reinforcing rings on the heads, when required, must be made at least 12-inch thick.*+ [Par. 3]

72.108 4 Thickness of material. Tank hoops and tie-rods must not be less than three-fourths inch in diameter. (See also § 72.108-3.)** [Par. 4]

72.108-5 Tank heads. Tank heads must be made flat, of one or more thickness of lumber. Outside heads must be reinforced by flat or angle metal rings at least 3 inches wide and 12-inch thick and having an outside diameter not exceeding by more than twice the thickness of the ring that of the diameter of the outside heads, which must be at least 6 inches larger in diameter than the outside diameter of the tank body. Rings and projection of the heads must be perforated to receive the tie-rods which extend from ring to ring, thus securing the outside heads to the tank. When tanks are mounted vertically on cars, the metal reinforcing rings of the outside heads may be omitted, in which case the upper end of the tank may be closed with a cover built up with the underside flat and constructed with wooden-top battens of at least 4 by 6 inches, stock size. The cover must be larger than the tank and have a projection over the side of the tank of at least 3 inches on all sides. The battens holding the cover planking together must extend beyond the tank in order to receive the holding-down bolts which secure the tank to the underframe of the car on which it is mounted. The cover may be provided with one manhole of suitable size to permit access to the interior of the tank. The manhole must be provided

**For statutory and source citations, see note to § 72.1A-1.

Page 889

[889]

with a wooden cover at least 2 inches thick built up in one piece with top battens, and must be securely fastened in place. The manhole cover must be provided with a filling and discharge opening securely closed.** [Par. 5]

72.108 6 Lining, coating, or treatment. The entire interior of the tank must be lined or coated or treated as follows:

(a) Lined with pure unvulcanized para or plantation stock rubber, free from adulterants or loading, at least one-sixteenth inch in thickness, or other approved rubber compound at least one-sixteenth inch in thickness, cemented directly to the lumber. The joints in the rubber lining must be made by either a butt joint with a cover strip or a lapweld, but in all cases the joints between rubber and rubber must be made by welding the layers together with a pressure_roller. The joints in the rubber lining may also be vulcanized. Rubber cement used for applying the rubber lining must be made of the same stock as the rubber lining, and any coloring pigment used in this cement solution must not react with hydrochloric acid to form a gas.

(b) Coated with asphaltum, coal tar, pitch, or other suitable material which will remain in plastic condition and not be subject to destruction by the lading.

(c) Treated with a material suitable for withstanding the action of the acid.*t [Par. 6]

72.108-7 Painting. All outside wooden and metal parts of the tank must be painted with an acid-resisting paint or with hot application of pitch to fill in all crevices.*t [Par. 7]

72.108-8 Joints. Joints between outside heads and ends of staves of tank and between filling and discharge openings and their covers must be made tight against leakage by the use of soft-rubber gaskets or by the cementing together of the lining of the tank and the lining of the heads. Joints between the staves may be calked, if necessary, with the same material with which the tank is lined, coated, or treated.*t [Par. 8]

72.108-9 Plugs for openings. Filling and discharge openings when not closed with a cover may be closed by a plug tapered to fit the opening, and the top diameter of the plugs must be at least 1 inch larger than the top diameter of openings. Plugs must be securely fastened in position, but need not be pressure tight.*+ [Par. 9]

72.108-10 Tests of tanks. Before a completed tank is placed in service there must be tightly inserted into or attached to the filling opening a pipe of such length that a hydrostatic head of at least 3 feet above the top of the interior of the tank is established by filling the tank and pipe with water having a temperature not exceeding 100° F. Tank must hold the water for not less than 30 minutes without leak or evidence of distress.** [Par. 10]

72.108-11 Marking. Each tank must be marked, thus certifying that the tank complies with all the requirements of this specification. These marks must be as follows:

(a) ICC-108, in letters and figures not less than three-eighths inch high, stamped plainly and permanently into the lumber near

Page 890

**For statutory and source citations, see note to § 72.1A–1.

the center of one outside head of the tank. This mark must also be stenciled on the tank in letters and figures at least 2 inches high.

(b) Initials of manufacturer and date of original test of tank in letters and figures not less than 3%-inch high, stamped plainly and permanently into the lumber of the tank immediately below the stamped mark specified in paragraph (a). These initials and date must also be stenciled on the tank in letters and figures at least 2 inches high.

(c) "Rubber-lined tank-Pressure test not required," or "Coated tank-Pressure test not required," or "Treated tank-Pressure test not required," stenciled on the tank immediately below the stenciled mark specified in paragraph (b).*† [Par. 11]

72.108-12 Reports. Before a tank car is placed in service the party assembling the completed car must furnish to car owner, Bureau of Explosives, and the secretary, mechanical division, American Railway Association, a report in approved form certifying that the tank and its equipment comply with all the requirements of this specification. In case of alterations of the tank or equipment therefor from original design, a similar report must be rendered to the same parties.*t [Par. 12]

SHIPPING CONTAINER SPECIFICATION 108A

METAL-JACKETED, COATED, WOODEN-STAVE METAL-HOOPED TANKS FOR MOUNTING ON OR TO FORM PART OF A CAR

72.108A-1 Type. Same as specification 108, except that tanks must be cylindrical and inclosed within a metal jacket. The space between the wooden tank and the metal jacket must be filled with material not subject to destruction by the lading.*+ [Par. 1]

72.108A-2 Bursting strength. Same as specification 108.** [Par. 2]

72.108A-3 Material. Same as specification 108, except that the following requirements for metal jacket are added:

Plates for metal jacket may be made of open-hearth boiler-plate steel of flange quality, or ordinary rolled steel. The minimum thickness of plates for the metal jacket, including thickness of each plate at rivet seams, must be as follows:

Rivets may be of the same quality as used for steam boilers and other pressure vessels, or of ordinary steel.** [Par. 3]

72.108A-4 Thickness of material. Same as specification 108, except that the additional requirements for metal jacket in § 72.108A-3 are also added.*+ [Par. 4]

**For statutory and source citations, see note to § 72.1A–1.

Page 891

72.108A-5 Tank heads. Same as specification 108, except that the tank heads of the metal jacket must be flat and flanged for riveting on the outside of the tank.*t [Par. 5]

72.108A-6 Lining, coating, or treatment. Same as specification 108, except that the following requirement is added:

The open spaces between the wooden tank and the metal jacket must be filled with asphaltum, coal tar, pitch, or other suitable material which will remain in plastic condition and not be subject to destruction by the lading.** [Par. 6]

72.108A-7 Painting. Same as specification 108.*+ [Par. 7] 72.108A-8 Joints. Same as specification 108.*+ [Par. 8] 72.108A-9 Plugs for openings. Same as specification 108.** [Par. 9]

10]

72.108A-10 Tests of tanks. Same as specification 108.** [Par.

72.108A-11 Marking. Same as specification 108.

(a) ICC-108A, in letters and figures not less than three-eighths inch high, stamped plainly and permanently into the metal near the center of one head of the jacket. This mark must also be stenciled on the jacket in letters and figures at least 2 inches high.

(b) Initials of manufacturer and date of original test of tank in letters and figures not less than 3-inch high, stamped plainly and permanently into the metal of the jacket immediately below the stamped mark specified in paragraph (a). These initials and date must also be stenciled on the jacket in letters and figures at least 2 inches high.

(c) "Coated, wooden-lined tank-Pressure test not required,' stenciled on the jacket immediately below the stenciled mark specified in paragraph (b).*+ [Par. 11]

72.108A-12 Reports. Same as specification 108.** [Par. 12]

72.108A-13 Riveting. All seams formed in the manufacture of the jacket and in the attachment of fixtures and connections may be single riveted. Seams must be riveted metal to metal without interposition of other material. The efficiency of the seams when single riveted must be not less than 60 percent and when double riveted must be not less than 70 percent of the strength of the thinnest plate.* [Par. 13]

72.108A-14 Calking. (a) All seams and rivets in the metal jacket must be calked on the outside when necessary to prevent seepage of intermediate filler.

(b) The edges of steel plates at all riveted seams must be prepared for calking so that the angle of the calking edge will be between 60° and 70° with the flat surface of the plate, except that the ends of the bottom sheet, edges of upper sheets at ends of tanks, and edges of tank-head flanges must be at right angles to the surface of the plates. The extreme calking edge distance, measured from center line of rivet hole, must be not less than one and one-half times the diameter of the hole and not more than that distance plus one-quarter inch.** [Par. 14]

Page 892

**For statutory and source citations, see note to § 72.1A-1.