ASME B30.7:2001 pdf download

ASME B30.7:2001 pdf download.BASE- MOUNTED DRUM HOISTS
This Standard is one of a series of safety standards on various subjects which have been formulated under the general auspices of the American National Standards Institute. One purpose of the Standard is to serve as a guide to governmental authorities having jurisdiction over subjects within the scope of the Standard. It is expected, however, that the Standard will find a major application in industry, serving as a guide to manufactur- ers, purchasers, and users of the equipment.
If adopted for governmental use, the references to other national codes and standards in the specific vol- umes may be changed to refer to the corresponding regulations of the governmental authorities. The use of cableways, cranes, derricks, hoists, hooks, jacks, and slings is subject to certain hazards that cannot be met by mechanical means but only by the exercise of intelligence, care, and common sense. It is therefore essential to have personnel involved in the use and operation of equipment who are competent, careful, physically and mentally qualified, and trained in the safe operation of the equipment and the handling of the loads. Serious hazards are overloading, dropping or slipping of the load caused by improper hitching or slinging, obstructing the free passage of the load, and using equipment for a purpose for which it was not intended or designed. The Standards Committee fully realizes the im- portance of proper design factors, minimum or max- imum sizes, and other limiting dimensions of wire rope or chain and their fastenings, sheaves, sprock- ets, drums, and similar equipment covered by the Standard, all of which are closely connected with safety. Sizes, strengths, and similar criteria are de- pendent on many different factors, often varying with the installation and uses. These factors depend on the condition of the equipment or material; on the loads; on the acceleration or speed of the ropes, chains, sheaves, sprockets, or drums; on the type of attachments; on the number, size, and arrangement ofsheaves or other parts; on environmental conditions causing corrosion or wear; and on many variables that must be considered in each individual case. The rules given in the Standard must be interpreted accordingly, and judgment used in determining their application. Some of the provisions of this Standard require compliance with information found in manuals or other documents supplied by the manufacturer with the equip- ment. The information includes recommendations, re- quirements, and instructions (e.g., ‘‘the reeving shall be checked for compliance with the recommendations of the manufacturer’’). Compliance with the provisions should not preclude the possibility of consulting a qualified person. This is true particularly when: the equipment has been altered, repaired, or modified; the manuals or documents supplied by the manufacturer are no longer available; or the manufacturer or a successor is no longer in business and the manuals are no longer available. However, the purpose of consulting a qualified person shall not be to avoid contacting the manufacturer and using the information supplied by the manufacturer. The Standards Committee will be glad to receive criticisms of this Standard’s requirements and sugges- tions for its improvement, especially those based on actual experience in application of the rules. Suggestions for changes to the Standard should be submitted to the Secretary of the B30 Committee, ASME, Three Park Avenue, New York, NY 10016- 5990, and should be in accordance with the following format: (a) cite the specific paragraph designation of the pertinent volume; (b) indicate the suggested change (addition, deletion, revision, etc.); (c) briefly state the reason and/or evidence for the suggested change; (d) submit suggested changes to more than one para- graph in the order that the paragraphs appear in the volume.