1 Rolling hoops of pliable solid rubber or other suitable material are also authorized when approved as to type and construction by the Bureau of Explosives. leakage. (a) Adequate to prevent Closure must be of screw-thread type or fastened by screw-thread device. Unthreaded cap is authorized for containers of 12 gallons or less if cap is provided with outside sealing devices which cannot be removed without destroying the cap or sealing device. (b) Closing part (plug, cap, plate, etc., see Note 1) must be of metal as thick as prescribed for head of container; this not required for containers of 12 gallons or less when the opening to be closed is not over 2.3 inches in diameter. NOTE 1: This does not apply to cap seal over a closure which complies with all requirements. (c) For closure with threaded plug or cap, the seat (flange, etc.) for plug or cap must have 5 or more complete threads; 2 drainage holes of not over 6inch diameter are allowed in that section of flange which extends inside the drum. Plug or cap must have sufficient length of thread to engage 5 threads when securely tightened with gasket in place. (d) Openings over 2.3 inches diameter are not permitted. Threads for plug or cap must be 8 or less per inch when over 4 inch standard pipe size. (1) Flanges with inside threads and plug must conform with the thread diameter and thread form shown in the following drawing (other details shown on the drawing are recommended): (e) Other threaded closures may be authorized by the Bureau of Explosives upon demonstration of equal efficiency. § 178.90-9 Defective containers. (a) Leaks and other defects to be repaired by method used in constructing container, not by soldering. § 178.90-10 Marking. (a) Marking on each container by embossing on head with raised marks, or by embossing or die stamping on footring on drums equipped with footrings, or on metal plates securely attached to drum by brazing or welding not less than 20 percent of the perimeter as follows: (1) DOT-5M. This mark shall be understood to certify that the container complies with all specification requirements. (2) Name or symbol (letters) of maker; this must be recorded with the Bureau of Explosives. (3) Gauge of metal in thinnest part, rated capacity in gallons, and year of manufacture (for example, 14-55-50). [29 F.R. 18893, Dec. 29, 1964, as amended by Order 66, 30 F.R. 5753, Apr. 23, 1965] § 178.90-11 Size of markings. (a) Size of marking (minimum): 1⁄2" high for 33-gallon or less, 34" for over 33 and not over 55 gallons. § 178.90-12 Type tests. (a) Samples, taken at random and closed as for use, must be capable of withstanding prescribed tests without leakage. Tests to be made of each type and size by each company starting production and to be repeated every 12 months, except as provided in subparagraph (3) of this paragraph. Samples last tested to be retained until further tests are made or for 2 years, whichever period is shorter. The type tests are as follows: (1) Test by dropping, filled with water to 98 percent capacity, from height of 6 feet onto solid concrete so as to strike diagonally on chime, or when without chime seam, to strike on other circumferential seam; also additional drop test on any other parts which might be considered weaker than the chime. Closing devices and other parts projecting beyond chime or rolling hoops must also be capable of withstanding this test. (2) Hydrostatic pressure test of 80 pounds per square inch sustained for 5 minutes. (3) Periodic drop and hydrostatic tests are not required where container has satisfactorily met prescribed tests at the original start of production. Satis factory test results must be obtained on samples of subsequent containers that have been altered in design or construction. Samples so tested must be retained until further tests are made or for 2 years, whichever period is shorter. [29 F.R. 18893, Dec. 29, 1964, as amended by Order 66, 30 F.R. 5753, Apr. 23, 1965] § 178.90-13 Leakage test. (a) Each container shall be tested, with seams under water or covered with soapsuds or heavy oil, by interior air pressure of at least 15 pounds per square inch. Equally efficient means of testing are authorized upon demonstration and proof of satisfactory tests to representative of Bureau of Explosives. Leakers shall be rejected or repaired and retested. § 178.91 Specification 5X; steel drums, aluminum lined. Removable head containers not authorized. (a) Required in all details. § 178.91-2 Rated capacity. (a) Rated capacity as marked, see § 178.91-11(a) (3). Actual capacity of straight-sided containers shall be not less than rated (marked) capacity plus 2 percent, nor greater than rated capacity plus 2 percent plus 1 quart, except that for containers over 30 gallons marked capacity actual capacity shall be not less than rated capacity plus 2 percent, nor greater than rated capacity plus 2 percent plus 2 quarts; actual capacity of bilge-type containers must be not less than rated capacity, nor greater than rated capacity plus 2 percent plus 2 quarts. § 178.91-3 Composition. (a) Sheets for body and heads to be low carbon, open hearth or electric steel. § 178.91-5 Seams. (a) Body seams welded. (b) Head and chime seams welded or double-seamed. (c) Flanges for closures welded in place. § 178.91-6 Chime reinforcement. (a) Containers over 25 gallons capacity, with flanged head secured to body, to have chime reinforcement adequate for its protection. 1 Rolling hoops of pliable solid rubber or other suitable material are also authorized when approved as to type and construction by the Bureau of Explosives. I Thickness shall be measured at any point on the sheet not less than 3% inch from an edge. (c) Lining. Required; of aluminum 99 percent pure; thickness 0.12''; all seams welded. It shall have reasonably good fit in outside drum and be arranged so that extensive movement therein will be prevented. § 178.91-8 Rolling hoops. (a) Separate hoops to have tight fit on shell and be firmly secured in place. Beading under rolling hoops or spot welding not permitted. § 178.91-9 Closures. (a) Adequate to prevent leakage; shall be located between rolling hoops; aluminum plate gasket, at least 0.10 inch thick, is required. Closure must be of screw-thread type or fastened by screwthread device. Unthreaded cap is authorized for containers of 12 gallons or less if cap is provided with outside sealing devices which cannot be removed without destroying the cap or sealing device. (b) Closing part (plug, cap, plate, etc., see Note 1) must be of metal as thick as prescribed for head of container; this not required for containers of 12 gallons or less when the opening to be closed is not over 2.3 inches in diameter. NOTE 1: This does not apply to cap seal over a closure which complies with all requirements. (c) For closure with threaded plug or cap, the seat (flange, etc.) for plug, or or cap, must have 5 or more complete threads; two 16" drainage holes are allowed. Plug, or cap, must have sufficient length of thread to engage 5 threads when screwed home without gasket. Threaded cap closures, 3 full threads engaged are also authorized. (d) Openings over 2.3" diameter not permitted. Threads for plug or cap must be 8 or less per inch when over 34" standard pipe size. § 178.91-10 Defective containers. (a) Leaks and other defects to be repaired by method used in constructing container, not by soldering. § 178.91-11 Marking. (a) Marking on each container by embossing on head with raised marks, or by embossing or die stamping on footring on drums equipped with footrings, or on metal plates securely attached to drum by brazing or welding not less than 20 percent of the perimeter as follows: (1) DOT-5X. In addition, when the container is of stainless steel, the type of steel used in body and head sheets, as identified by American Iron and Steel Institute type number, and also the letters HT following steel designation on containers subjected to stress relieving or heat treatment during manufacture (for example, DOT-5X-304 or DOT-5X |