ISO 9930-1993 Green beans storage and refrigerated transport《绿豆 储藏和冷藏运输》.pdf

1、I N T E R NAT I O STANDARD IAL IS0 9930 First edition 1993-09-1 5 Green beans - Storage and refrigerated transport Haricots verts - Entreposage et transport rfrigr Reference number IS0 9930:1993(El IS0 9930: 1993 (E) Foreword IS0 (the International Organization for Standardization) is a worldwide fe

2、deration of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that com

3、mittee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the

4、technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 9930 was prepared by Technical Committee ISO/TC 34, Agricultural food products, Sub-Committ

5、ee SC 14, Fresh fruits and vegetables. Q IS0 1993 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without per- mission in writing from the publisher. international Organization

6、 for Standardization Case Postale 56 CH-121 1 Genve 20 Switzerland Printed in Switzerland II IS0 9930 93 W 4853903 0544959 04% INTERNATIONAL STANDARD IS0 9930:1993(E) Green beans - Storage and refrigerated transport 1 Scope This International Standard gives guidance on con- ditions for the successfu

7、l cold storage and long- distance refrigerated transport of green (snap) beans belonging to the species Phaseolus vulgaris L. and fhaseolus coccineus L., intended for direct con- sumption or industrial processing. 2 Normative reference The following standard contains provisions which, through refere

8、nce in this text, constitute provisions of this International Standard. At the time of publi- cation, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the m

9、ost re- cent edition of the standard indicated below. Mem- bers of IEC and IS0 maintain registers of currently valid International Standards. IS0 21 69:1981, Fruits and vegetables - Physical conditions in cold stores - Definitions and measure- ment. 3 Definitions For the purposes of this Internation

10、al Standard, the definitions given in IS0 2169 apply. 4 Conditions for harvesting and storage 4.1 Varieties The number of green (snap) bean varieties changes year by year with their economical availability de- pending extensively on the seed trade. Suitable methods of storage depend, therefore, on t

11、he quality of the pods rather than the variety, although yellow varieties have somewhat better storage properties. 4.2 Harvesting The product is harvested at an unripe stage (i.e. har- vest maturity). The pods should be easily broken by hand and the seeds should be adequately small and tender. Mecha

12、nically harvested beans are only suit- able for storage when their quality meets the re- quirements specified in 4.3. 4.3 Characteristics for storage The main characteristics of species suitable for cold storage are the following. The pods shall be - whole and tender; - free from any defect includin

13、g mechanical defects; - clean and dry; - of a size, shape and colour characteristic of the variety concerned; and - closed and not withered. 4.4 Packing The beans shall be packed in such a way as to protect them properly, and to retain their good quality and perfect condition during transport. They

14、may be packed in wooden or plastic crates covered with a coarsely perforated film. Each package may contain green bean pods up to a maximum of 12 kg. 5 Optimum storage and transport conditions 5.1 Temperature Optimum temperature limits for the beans are be- tween 5 “C and 10 “C for 7 to 10 days. The

15、 tempera- ture should not be lower than 5 “C and should never exceed 10 OC. Green beans exposed to higher tem- 1 - IS0 9930 93 = 4853903 0544960 863 IS0 9930:1993(E) peratures will wilt quickly so rapid removal of field- heat subsequent to harvest is necessary. Hydro-cooling may be an efficient proc

16、edure to attain, as fast as possible, the desired range of storage temperature. 7.2 Transport vehicle and loading 5.2 Relative humidity Relative humidity of the ambient air shall be between 90 % and 95 %. Lower relative humidity will result in wilting. 5.3 Air circulation Circulation of air is neces

17、sary to keep the constant temperature. and relative humidity as described in 5.1 and 5.2. 5.4 Storage Green beans packed in wooden or plastic boxes may be placed in a precooled store in stacks. The stacking height depends on the load-bearing capacity of the containers. 6 Storage life Under the condi

18、tions mentioned in 5.1 and 5.2, good-quality beans may be stored for about 10 days. Controlled-atmosphere storage is of little use. 7 Transport 7.1 Means of transport It is essential to maintain the chain of refrigeration in order for the beans to retain their quality. For this purpose, the use of i

19、ce or mechanically refrigerated railway trucks and lorries is recommended. 2 Beans should not be transported in vehicles in which materials harmful to human health, such as fertilizers or pesticides, were previously carried. The equipment should be in a good serviceable condition. The fans should fu

20、nction and the drains should be free in ice- refrigerated railway trucks; floor racks should be in- stalled to ensure the movement of air. Before loading, the temperature of the loading space in the vehicles should be set to that required, by ad- justments in the bunkers or mechanical refrigeration.

21、 Wooden or plastic boxes should be stacked lengthwise (facing forward), and empty boxes necessary for filling the spaces between the stacks should be placed crosswise to prevent the load from moving. Similarly, any gaps remaining should be filled in with empty boxes or crates. The ice-bunker in ice-

22、refrigerated railway trucks should be re-iced to capacity after loading and, if necessary, at an interim station to ensure that the trucks arrive with their bunkers containing not less than one-third their capacity of ice at the destination. 8 Operations on arrival After unloading, the beans should

23、be continuously re- frigerated or be consumed or processed immediately. IS0 9930 93 W 4851903 0544963 7TT W IS0 9930:1993(E) U DC 635.652S64.8.037 (083.13) Descripton: agricultural products, plant products, vegetab!es, beans. food storage, cold storage, transportation, refrigerated transport, general conditions. Price based on 2 oaaes