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Thank you for interesting in our services. We are a non-profit group that run this website to share documents. We need your help to maintenance this website. Please help us to share our service with your friends. Share Embed Donate. ASME B There will be no written interpretations of the requirements of this Standard issued to this edition.

Errata to codes and standards may be posted on the ASME Web site under the Committee Pages to provide corrections to incorrectly published items, or to correct typographical or grammatical errors in codes and standards. Such errata shall be used on the date posted. There is an option available to automatically receive an e-mail notification when errata are posted to a particular code or standard. This code or standard was developed under procedures accredited as meeting the criteria for American National Standards.

The Standards Committee that approved the code or standard was balanced to assure that individuals from competent and concerned interests have had an opportunity to participate. The proposed code or standard was made available for public review and comment that provides an opportunity for additional public input from industry, academia, regulatory agencies, and the public-at-large.

ASME does not take any position with respect to the validity of any patent rights asserted in connection with any items mentioned in this document, and does not undertake to insure anyone utilizing a standard against liability for infringement of any applicable letters patent, nor assumes any such liability. Users of a code or standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, is entirely their own responsibility.

Participation by federal agency representative s or person s affiliated with industry is not to be interpreted as government or industry endorsement of this code or standard.

ASME accepts responsibility for only those interpretations of this document issued in accordance with the established ASME procedures and policies, which precludes the issuance of interpretations by individuals. No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher. Committee Roster. Correspondence With the B73 Committee. Definitions of Terms.

Additional Definitions. Pressure and Temperature Limits. Shaft Sealing. Bearings, Lubrication, and Bearing Frame. Materials of Construction.

Corrosion Allowance. Direction of Rotation. Miscellaneous Design Features. Tests and Inspections. Specially Requested Documentation. Cylindrical Seal Chamber. Self-Venting Tapered Seal Chamber. Seal Chamber Face Runout. Seal Chamber Register Concentricity. Universal Cover. Packing Box. Backplate With Seal Chamber. Backplate With Clamp Ring. Sample Outline Drawing. Baseplate Dimensions. Pump Material Classification Codes.

Minimum Requirements for Auxiliary Piping Materials. Approximate Hydraulic Coverage, 50 Hz. Approximate Hydraulic Coverage, 60 Hz. Minimum Continuous Flow. Although the Standards Committee had not completed its assignment, the work of one of its task forces resulted in the development of a de facto standard that was published by the Manufacturing Chemists Association in as an American Voluntary Standard AVS. More than a dozen manufacturers of chemical process pumps marketed pumps conforming with the AVS.

In , the Hydraulic Institute published a tentative standard similar in content to the AVS, but updated certain portions. Although the Hydraulic Institute Tentative Standard reflected more nearly the current practice of manufacturers and users, it was believed necessary to publish a new document that would supersede both the original AVS and the tentative standard, and that could incorporate the technical content of both documents and dimensional criteria and features generally accepted by manufacturers and users.

ANSI B The edition brought to 15 the number of pump sizes covered by the standard. The committee continued to be active, adding 5 more sizes for a total of 20, and making a number of revisions in the text of the standard.

Shortly thereafter, the American National Standards Committee B73 undertook to revise the standard, and, as a result, new information on baseplate rigidity, bearing frame adapter, and bearing housing drain was introduced. The revision included larger and self-venting tapered seal chambers, as well as conventional packing boxes; revised baseplate dimensions, with a new identification numbering system; and a ductile material requirement for the bearing frame adapter if it clamps the rear cover plate to the casing.

The revision of the standard incorporated 7 new sizes of pumps, bringing the total number to Many of the new additions were at the request of the user population. Inclusion of ISO standard size pumps was considered by the committee. It was consensus that the ISO inclusion would have made the B Thus, this action was rejected by the committee.

Recent publications by the Hydraulic Institute in areas such as baseplate tolerance, acceptable nozzle loads, preferred operating region, and NPSH margin were incorporated into this revision. A standardized electronic data exchange file specification was established as an integral portion of the standard.

This was, in part, in response to the needs of the user community for compliance to U. In total, these revisions to the standard were intended to better serve process industries and expand the use of ASME B73 pumps worldwide. The revision of the standard includes several changes to reduce redundancy in the B73 set of standards and to better align with the Hydraulic Institute HI and American Petroleum Institute API pump standards. Revisions have also been made to further improve the reliability of the B ASME standard B Reference is now made to API practices for mechanical seal configurations and cooling and heating plans.

A universal cover has been added to the standard as an alternate sealing cover. Requirements for the bearing frame have been revised to assure more robust pumps.

C-face motor adapters are now an option. More detail has been added to the required drawings, curve, and documentation that should be included with the pump.

A new data sheet has been developed and added to the standard. Suggestions for improvement of this Standard are welcome. This revision was approved as an American National Standard on November 14, Burkhardt, Chair R. Estep, Vice Chair C. Allis, Consultant K. Burkhardt, DuPont G. Clasby, Flowserve Corp. Coussens, Peerless Pump Co. Estep, The Dow Chemical Co. Huebner, Flowserve Corp. James, Best PumpWorks B. Myers, Bayer CropScience G. Sabol, Lyondell Chemical Co.

Strautman, Alternate, Lyondell Chemical Co. Schnelzer, Met-Pro Corp. ASME Standards are developed and maintained with the intent to represent the consensus of concerned interests. As such, users of this Standard may interact with the Committee by proposing revisions and attending Committee meetings.

Revisions are made periodically to the Standard to incorporate changes that appear necessary or desirable, as demonstrated by the experience gained from the application of the Standard. Approved revisions will be published periodically. The Committee welcomes proposals for revisions to this Standard.

Such proposals should be as specific as possible, citing the paragraph number s , the proposed wording, and a detailed description of the reasons for the proposal, including any pertinent documentation.

Proposing a Case. Cases may be issued for the purpose of providing alternative rules when justified, to permit early implementation of an approved revision when the need is urgent, or to provide rules not covered by existing provisions.

The request should identify the Standard, the paragraph, figure or table number s , and be written as a Question and Reply in the same format as existing Cases. Requests for Cases should also indicate the applicable edition s of the Standard to which the proposed Case applies.

Attending Committee Meetings.


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