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BOXED CARBOYS (GLASS, EARTHENWARE, CLAY, OR STONEWARE) Section 72.1A-1 Packages used more than once. (a) Packages must be carefully examined before each shipment and any parts broken or decayed or inefficient in any way, must be replaced or repaired before shipment.

(b) Carboys boxed under previous specifications of the Commission are authorized to be continued in use if they will withstand the tests prescribed by § 72.1A-5; reboxing must be done according to the requirements of this specification.

(c) The use of carboys with badly chipped lips or with cracked necks is forbidden; in case a closing device with gasket is used, the carboy must have an even surface around the mouth on which the gasket seats.** [Pars. 1-3]

*§§ 72.1A-1 to 72.108A-14, inclusive, issued under the authority contained in sec. 232-236, 41 Stat. 1444, 1445; 18 U.S.C. 382–386.

In 88 72.1A-1 to 72.108A-14, inclusive, the number or numbers (including the letter, when present) between the decimal point and the dash correspond with the respective specification numbers in Regulations for transportation by rail of explosives and other dangerous articles in freight, express and baggage services, including specifications for shipping containers, Part IV (shipping container specifications), Interstate Commerce Commission, revised, May 12, 1930, effective Oct. 1, 1930, as amended. Paragraphs of the source reference are noted in brackets at the end of each section; amendments are noted in brackets following sections, paragraphs or subparagraphs affected.

72.1A-2 Closing devices. (a) Except as required or authorized by the packing regulations for the particular article being shipped, carboys must be closed by one of the following methods:

(1) By porcelain, clay, or earthenware stoppers, with gaskets, fastened by methods described in paragraph (b). Stoppers must be resistant to disintegration and not brittle or friable; clay and earthenware stoppers must be sufficiently porous to vent off pressure in the carboy; porcelain stoppers must be vented.

The shank of stopper must be at least 1 inches long, must taper not more than 1 inch on the diameter and must have a clearance in the carboy neck of not over 1/8 inch; the top must have two grooves of 516-inch maximum width and 5%2-inch minimum depth except that screw-in stoppers are authorized with or without grooves.

Gaskets must be 14-inch asbestos rope or other similar asbestos material; those cut from asbestos board not permitted. Gaskets containing less than 98 percent pure asbestos must be impregnated with machine oil and paraffin mixture (50 percent of each is generally satisfactory) at about 250° F. and drained. Gaskets must be in plastic condition when applied. Use of plaster of Paris or other cement as substitute for gaskets is forbidden.

(2) By glass stoppers ground to fit, secured by burlap or other suitable material.

(3) If the contents of the carboy is not corrosive, by a cork or other efficient closing device.

(b) Stopper fastening devices are authorized, under the provision that all metal must be coated with an acid-resistant coating, as follows:

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(1) Loop of soft iron wire (not steel), No. 14 Birmingham gage or thicker, applied under lip of carboy neck, passed over the stopper and down on the other side and twisted up tightly.

(2) Lever of acid-resistant wire, No. 9 Birmingham gage or thicker, and of proper arrangement on the neck of the carboy.

(3) Screw-on cap of acid-resistant metal, No. 18 United States Standard gage or thicker. At least two full threads must be engaged with gasket and stopper in place.

(4) Screw-in stoppers with large rounded threads. At least two full threads must be engaged with gasket in place.*t [Pars. 4, 5]

72.1A-3 Manufacture (a) Carboys. (1) Carboys must have nominal capacity of 5 to 13 gallons inclusive and be plainly and permanently marked to indicate name of manufacturer and year of manufacture. Copy of marking must be filed by the manufacturer with the Bureau of Explosives.

(2) (i) Glass carboys must contain at least 20 pounds of glass for 12-gallon carboys and 21 pounds for 13-gallon carboys, and must be thoroughly annealed by the best methods.

(ii) Glass in side walls should be well distributed and at least 16-inch thick. Taper of mouth should be the least possible; one thirty-second inch recommended. Top of lip must have flat, even surface for gasket seat.

(iii) Each carboy must be carefully inspected and tested and all defective carboys must be rejected.

(3) Clay, stoneware, or earthenware carboys must be made of acidproof material, as evenly distributed as practicable in bottom and side walls, and not less than 3%-inch thick.

(b) Outside containers—(1) Type. Outside container must be a wooden box completely inclosing the body of the carboy. Sides and ends must be applied with grain of wood horizontal; for ends at least twice as thick as prescribed, grain may be vertical.

(2) Material. (i) Material must be good, sound lumber, dry and well seasoned, without loose knots.

(ii) Top, bottom, ends, and sides must be twenty-five thirty-seconds inch or thicker for 7 to 13 gallon carboys and five-eighths inch or thicker for less capacity. Thicknesses are for finished box.

(3) Cleats. Cleats must be same thickness as prescribed for sides of box; width, at least four times such thickness, except that width at least three times such thickness is authorized for carrying cleats and cleats for shoes. Use of cleats of other cross section equal to the foregoing is also authorized. Cleats are required as follows: [As amended June 27, 1931]

(i) As reinforcement for the four vertical edges; not required when ends are at least twice as thick as prescribed;

(ii) Carrying cleats: Two; one each on opposite sides of the box; (iii) Cleats for shoes: Two; one each along opposite outside edges of bottom of box, applied parallel to carrying cleats. [As amended Apr. 7, 1931]

(4) Hole for neck. Under edge of hole, to accommodate neck of carboy, must be beveled off about 45°.

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

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(5) Nails. (i) Cement coated nails, except for top, are recommended. Sides and ends must be nailed together and to the prescribed reinforcing pieces; tops and bottoms must be nailed to sides and ends; two or more nails are required in each end of each board. (See exceptions.)

Parts of two or more pieces are considered as one piece when Linderman jointed and glued. [As added Apr. 18, 1932] (ii) Size and interval as follows (see exceptions):

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(iii) Exceptions: Authorized as follows:


(a) For top, one or two nails in each end of each board not over

8 inches wide and three nails in each end of wider boards. Nails along edges parallel to grain of wood not required.

(6) For a top reinforced on the underside across the grain with cleats fitting closely in contact with two opposite sides of the box, two or more nails in each of the cross-grain edges of the top. Cleats must be at least as thick as the top, and in width at least two times the thickness of the top plus three-fourths inch. Such tops are authorized only for use on carboy boxes cushioned with fibrous material.

(c) For bottom, average interval 6 inches for nails along edges parallel to grain of wood.

(d) Screws of holding power equal to nails specified.*t [Pars. 6-13]

72.1A-4 Marking. Each box must be plainly and permanently marked, with hot branding iron or black printing ink with high pressure printing dies, in letters and figures at least three-fourths inch high as follows:

(a) ICC ***, the stars to be replaced by letters and figures to indicate the specification number under which the container was made. (For example, ICC-1A, ICC-1B, etc.) This mark shall be understood to certify that the container complies with all specification requirements.

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

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