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前言这项标准是应牛奶场技术协会的要求制定的。第一次出版在1961年,以“牛奶罐技术条件”的标题出版。第一次修正案是在1968年发行,标题改为“牛奶罐技术条件(常压型)”。条款中标准的范围被限制在罐容量不超过4000加仑(18000升),而且不承受加压和抽真空,始终有排气孔与大气相通。在这一版中,以前的限制取消了,真空下罐装和压力下泄放就包括进来了。新的附录包括的压力试验(附录 A)和结构材料的选择,(附录 B)涉及到检查和测量的附录 C 已重写,以便根据现代的实践提供一个实用的指导。这次修订稿准备期间,已经考虑到采用塑料材料制作的牛奶运输罐,然而,由于没有使用这种材料的充足经验,还不能制定出一个令人满意的规定。
Preface This standard was developed at the request of the Dairy Farm Technology Association. First published in 1961, published under the title “Technical conditions of milk cans”. The first amendment was issued in 1968 and the title was changed to “Milk cans technical conditions (atmospheric type)”. The standard scope of the clauses is limited to a tank capacity of no more than 4,000 gallons (18,000 liters) and is not pressurized and evacuated, with vents always open to the atmosphere. In this edition, the previous restrictions have been lifted and can be included in cans and under pressure under vacuum. The new appendix includes a selection of stress tests (Appendix A) and structural materials, (Appendix B) relating to inspection and measurement of Appendix C has been rewritten in order to provide a practical guide based on modern practice. The preparation of this revised version already takes into account the use of plastic milk containers, but due to the lack of adequate experience in the use of such materials, it has not been possible to establish a satisfactory rule.