or (2) Eleven and one-half (11%) threads per inch, standard pipe size. (e) Other types of closures are authorized if they perform without failure under the tests required by this section and a record of the tests is retained during the period the closure is in use. [29 FR 18893, Dec. 29, 1964. Redesignated at 32 FR 5606, Apr. 5, 1967, and amended by Amdt. 178-59, 44 FR 66200, Nov. 19, 1979] $178.88-9 Defective containers. (a) Leaks and other defects to be repaired by method used in constructing container, not by soldering. (b) [Reserved] $178.88-10 Marking. (a) Each barrel or drum must be marked by embossing on a permanent head (or by embossing or die stamping on footring or drums equipped with footrings, or on metal plates securely attached to drum by brazing or welding not less than 20 percent of the perimeter of the plate) with clearly legible raised characters as follows: (1) DOT-5K. (2) If the drum is manufactured of stainless steel, the type of steel used in the body and head sheets as identified by the American Iron and Steel Institute type number, and also the letter HT following the steel designation on barrels or drums subjected to stress relieving or heat treatment during manufacture (for example, 304, 316, 304 HT). This mark should be near the DOT mark. (3) Name or symbol of person making the mark specified in paragraph (a)(1) of this section. A symbol, if used, must be registered with the Director, OHMT. (4) The gauge of the metal in the thinnest part, the rated capacity in gallons, and the year of manufacture (for example, 18-55-83). When the gauge of the metal in the body differs from that in the heads, both must be indicated with a slanting line between them and with the gauge of the body indicated first (for example, 18/16-5583 for body 18 gauge and head 16 gauge). (b) For the purpose of this subchapter, the minimum character size specified in § 173.24(c)(1)(iv) is waived. [Amdt. 178-83, 50 FR 11059, Mar. 19, 1985] § 178.88-11 [Reserved] 8 178.88-12 Type tests. (a) Samples taken at random and closed as for use, shall withstand the prescribed tests without leakage. Each packaging design type must successfully pass the tests before the packaging is used. The test must be repeated every 12 months. A packaging design type is defined by the design, size, material, thickness, and manner of construction, but may include various surface treatments. A type may also include packagings which differ from the design type only in their lesser design heights. The samples last tested must 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 of 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 when container has satisfactorily met prescribed tests at the original start of production. Satisfactory 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. (b) [Reserved] [29 FR 18893, Dec. 29, 1964, as amended by Order 66, 30 FR 5753, Apr. 23, 1965. Redesignated at 32 FR 5606, Apr. 5, 1967, and amended by Amdt. 178-83, 50 FR 11059, Mar. 19, 1985] 8178.88-13 Leakage test. (a) Each container shall be tested, with seams under water or covered |