AA-TR7-1981-R1999.pdf
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1、U The Incorporated Aluminum Association o Copyright The Aluminum Association Inc. Provided by IHS under license with AA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 11:24:00 MDTNo reproduction or networking permitted without license from IHS -,-,- Use of the Inform
2、ation Any data and suggestions contained in this publication were compiled andlor developed by the Aluminum Association. Inc. In view of the variety of conditions and methods of use to which such data and suggestions m y be applied, the Aluminum Association and its member companies assume n o respon
3、sibility or liability for the use of information contained herein. Neither the Aluminum Association nor any of its member companies give any warranties, express or implied, with respect to this information. First Edition, January 1981 Reprinted 1996 Reaffirmed 1999 Copyright The Aluminum Association
4、 Inc. Provided by IHS under license with AA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 11:24:00 MDTNo reproduction or networking permitted without license from IHS -,-,- Guidelines for inwplant handling of aluminum sheet and plate Contents 1. Introduction 2 2. Pa
5、ckaging 2 3. Matenal Receiving Inspection . 2 4. Storage 2 5. Handling 4 6. Turning Flat Sheet by Hand 6 8. Processing . 13 7. other Techniques for Handlkg Sheet and Plate . . 1 0 I All Aluminum Association published data, specifications and other material are reviewed at least every five years and
6、revised, reafirmed or withdrawn. Users are advised to contact the Aluminum Association to ascertain whether the information in this publication has been superseded in the interim between Publication and proposed use. 1 Copyright The Aluminum Association Inc. Provided by IHS under license with AA Lic
7、ensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 11:24:00 MDTNo reproduction or networking permitted without license from IHS -,-,- i. Introduction Aluminum sheet and plate can be efficiently handled manually and with most equipment. This brochure describes procedures and
8、 methods that have been used successfully. The suggestions and precautions outlined for handling aluminum to minimize surface damage and in-plant scrap can be equally beneficial for handling other metal products. 2. Packaging Aluminum products are packaged to prevent damage to the metal during trans
9、it, transfer and storage. It is important that the size, weight and configuration of the skidded material are within the limits of your handling system. Material suppliers can furnish material packed in a customary method which offers maximum protection. Should handling equipment limitations dictate
10、 different skid configurations, it is recommended that the material supplier be contacted. 3. Material Receiving Inspection Inspection of incoming material for physical damage and wetness is a vital part of the receiving process. This should be done, if possible, while the material is sti on the veh
11、icle or as it is being unloaded. If any physical or water damage is discovered on the skids, packaging or the metal, it should be noted on the receiving papers. The purchasing or quality control department should be informed immediately Additional information about incoming material inspection can b
12、e found in the Aluminum Association publication, “Guidelines for Minimizing Water Staining of Aluminum.” 4. Storage Proper storage of aluminum is vital to preventing damage to the metal. Damage to material in storage is primarily caused by condensation or by the storage systems that are in use. A. W
13、ater Stain In the presence of moisture and under certain conditions aluminum will stain. Aluminum and other metals can stain when water is trapped between wraps, sheets or other mating surfaces. If there is no air flow to remove the water, prolonged contact between the water and the metal causes a r
14、eaction between the two which results in water stain. Sources of water include rain, snow, water leaks and condensation. Water vapor will condense on the surface of a metal if the temperature of the metal drops below the dew point of the surrounding air, When metal is received, it should be inspecte
15、d for wetness. If found wet, note this on a i l copies of the receiving papers and inform the purchasing or quality control dipartment immediately. If the metal feels cold, notify your supervisor and temporanly store the metal in a cool indoor area away from cold drafts to allow it to warm slowly. (
16、If this is not done, and the metal is stored in a heated warehouse immediately, condensation may occur 2 Copyright The Aluminum Association Inc. Provided by IHS under license with AA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 04/18/2007 11:24:00 MDTNo reproduction or networ
17、king permitted without license from IHS -,-,- and later result in water stain.) Once the metal warms (in about 24 hours), move it to the warehouse. When metal is moved between storage areas, check the temperature of he metal and the temperature of the area to which the metal will be taken. If the te
18、mperature of the new storage area is warmer by 11C (20F) or more, move only enough metal for immediate use and noti your supervisor. Leave the remainder of the metal where it is until required for use. The following steps need to be taken, whenever possible, to prevent moisture from condensing on th
19、e metal in storage: e Store metal in heated warehouses. e Mow wrapping materials to remain intact (repair if tom) until the aluminum is used. e Store away from outside doors where the metalcould be subject to rapid temperature fluctuations. e Store away from high humidity areas (such as paint or ano
20、dizing lines) where the dew point is usually high. The Aluminum Association publication, “Guidelines for Minimizing Water Staining of Aluminum” provides precautionary measures to prevent stined material. B. Flat Sheet and Plate Storage Various types of storage racks are being used today and circumst
21、ances may warrant these racks tied permanently into the building structure. But an ever-changing product-mix demanded by industry has stimulated development of simple, rugged, self-supporting racking systems that can be erected, modified, or moved quickly Figure 1. Typical type of cantilever rack an
22、d easily Several manufacturers offer systems of this type. The next series of figures presents some typical examples. and easily erected from standard components. Arms of various lengths and capacities are interchangeable. They can be moved up or down by one employee to accommodate changing storage
23、requirements. The type of rack shown in Figure 2 is also easily disassembled and moved. The cantilever rack shown in Figure 1 is self-supporting Figure 2. Typical type of storage rack C. Coil Storage Since coils concentrate many pounds of metal in a compact, stable package, storage may or may not be
24、 a critical problem. Original skidded coil packages can ususally be stacked three or four high. But this is not always the most satisfactory answer for locations where coils are frequently removed and returned to the storage area. It presents difficulty in returning partly-used coils to storage. (Ne
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