0, rb.ao/j;6i- /(i or ASTM D B38-72 using speed C. The test may be discon- tinued at this point if the results show not less than 85 percent retention of tensile strength and elongation. Otherwise, the test shall be repeated on 10 specimens which have been immersed for a total of 60 days to determine conformance with 3.11. 4.12. Flammability and elevated temperature resistance — Two tests shall be performed : a. A container shall be completely rilled with Avater at 75 ± 5 °F. A %-inch-diameter Bunsen burner, using natural gas having a calorific value of approximately 1000 btu per cubic foot, shall be adjusted so that the outer blue flame is 1 inch in length and the inner blue cone is % inch long. The temperature of the flame just above the inner cone shall be a minimum of 1700 °F and the tem- perature of the flame % mcn above the burner shall be a minimum of 550 °F. The burner shall be tilted at an 18° angle and placed so that the closest edge of the tip is % inch from the bottom of the container. The burner shall remain in this position for 75 seconds. The container shall then be examined for leaks. This test shall be repeated on the side and on any corner of the container. Following each test, the container shall be exam- ined for leaks. b. A container shall be completely filled with water at 75 ± 5 °F. A i^-inch-diameter steel rod, 6 inches long, shall be heated to 500 ± 10 °F and immediately placed lengthwise on the bottom of an inverted container where it shall be allowed to cool to 75 ± 5 °F. This procedure shall be re- peated ; except that the heated rod shall be placed lengthwise on the side wall of the container after the container has been placed on its side. The con- tainer shall be examined for leaks. 4.13. Stress cracking — Two containers shall be tested in accordance with procedure B of ASTM D 2561-70, Standard Method of Test for Environmental Stress-Crack Resistance of Blow- Molded Polyethylene Containers;" except that, the outside of the containers shall not be exposed to the stress-cracking agent. 5. EFFECTIVE DATE AND IDENTIFICATION The effective date of this Standard is May 1, 1974. As of the effective date, reference to PS 61- 15 See footnote 2, page 1. 74, may be made in contracts, codes, advertising, invoices, product labels, and the like, but no prod- uct may be advertised or represented in any man- ner which would imply or tend to imply approval or endorsement of that product by the National Bureau of Standards, the Department of Com- merce, or by the Federal Government. The following statements are suggested for use in representing products as conforming to all re- quirements of this Standard : (1) "This container conforms to all require- ments established in Voluntary Product Standard PS 61-74, developed and pub- lished in accordance with the U.S. De- partment of Commerce Procedures for the Development of Voluntary Product Standards. Full responsibility for the conformance of this product to the stand- ard is assumed by (name and address of producer or distributor)." (2) "Conforms to PS 61-74, (name and ad- dress of producer or distributor)." 6. HISTORY OF PROJECT In 1964 The Society of the Plastics Industry, Inc., requested the assistance of the Department of Commerce in establishing a Voluntary Product Standard for plastic containers for petroleum products. In September 1965, a draft proposal was circulated for comment. After an extensive amount of testing, and several committee ballots, changes were made to the standard which were based upon performance. A new draft was devel- oped by the Standard Review Committee in March 1973. In June 1973, public announcement was made, and the recommended Voluntary Prod- uct Standard was widely circulated for accept- ance. The response to this circulation indicated that certain changes were necessary. The standard was again circulated for acceptance in January 1974 and the response indicated a consensus of acceptability as defined in the Procedures for the Development of Voluntary Product Standards. Accordingly, the Standard designated PS 61-74, Plastic Containers (Jerry-Cans) for Petroleum Products, was approved for publication by the National Bureau of Standards to be effective May 1, 1974. Technical Standards Coordinator: Karl G. Newell, Jr. Standards Development Services Section, National Bureau of Standards, Washington, D.C. -20234 7. STANDING COMMITTEE A Standing Committee has been appointed to assist in keeping this Voluntary Product Stand- ard up to date. The names of the members of the committee are available from the Standards De- velopment Services Section, Washington, D.C. 20234, which serves as secretariat for the com- mittee. APPENDIX — Metric Conversion The conversion factors and units contained in this appendix are in accordance with the Inter- national System of Units (abbreviated SI for Systeme International d'Unites). The SI was de- fined and given officials status by the 11th Gen- eral Conference on Weights and Measures which met in Paris in October 1960. For assistance in converting U.S. customary units to SI units, see ASTM E 380, ASTM Standard Metric Practice Guide, available from the American Society for Testing and Materials, 1916 Race Street, Phila- delphia, Pa. 19103. The conversion factors for the units found in this Standard are as follows: 1 inch = 25.4 millimeters 1 gallon = 3.8 liters 1 pound = 0.454 kilogram t c = (tf F — 32)/1.8 where : t c = temperature in degrees Celsius t F = temperature in degrees Fahrenheit Digitized by the Internet Archive in 2012 with funding from LYRASIS Members and Sloan Foundation http://www.archive.org/details/plasticcontainerOOunit NBS TECHNICAL PUBLICATIONS PERIODICALS JOURNAL OF RESEARCH reports National Bureau of Standards research and development in physics, mathematics, and chemistry. It is published in two sec- tions, available separately: • Physics and Chemistry (Section A) Papers of interest primarily to scientists working in these fields. This section covers a broad range of physi- cal and chemical research, with major emphasis on standards of physical measurement, fundamental con- stants, and properties of matter. Issued six times a year. 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