Ul 142

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UL 142

Steel Aboveground Tanks for Flammable and Combustible Liquids


FEBRUARY 12, 2010 − UL 142


UL Standard for Safety for Steel Aboveground Tanks for Flammable and Combustible Liquids, UL 142 Ninth Edition, Dated December 28, 2006

Summary of Topics The following revisions to the ninth edition of UL 142 are beingpublished: 1. Revisions to clarify tank venting requirement 2. Revision to correct dike top wall hydro load deflection requirement
Text that has been changed in any manner or impacted by UL’s electronic publishing system is marked with a vertical line in the margin. Changes in requirements are marked with a vertical line in the margin and are followed by an effective date note indicating the date ofpublication or the date on which the changed requirement becomes effective. The new and revised requirements are substantially in accordance with Proposal(s) on this subject dated July 3, 2009 and October 2, 2009. All rights reserved. No part of this publication may be reproduced, stored in a retrieval system, or transmitted in any form by any means, electronic, mechanical photocopying, recording, orotherwise without prior permission of UL. UL provides this Standard ″as is″ without warranty of any kind, either expressed or implied, including but not limited to, the implied warranties of merchantability or fitness for any purpose. In no event will UL be liable for any special, incidental, consequential, indirect or similar damages, including loss of profits, lost savings, loss of data, or anyother damages arising out of the use of or the inability to use this Standard, even if UL or an authorized UL representative has been advised of the possibility of such damage. In no event shall UL’s liability for any damage ever exceed the price paid for this Standard, regardless of the form of the claim. Users of the electronic versions of UL’s Standards for Safety agree to defend, indemnify, andhold UL harmless from and against any loss, expense, liability, damage, claim, or judgment (including reasonable attorney’s fees) resulting from any error or deviation introduced while purchaser is storing an electronic Standard on the purchaser’s computer system. The requirements in this Standard are now in effect, except for those paragraphs, sections, tables, figures, and/or other elements of theStandard having future effective dates as indicated in the note following the affected item. The prior text for requirements that have been revised and that have a future effective date are located after the Standard, and are preceded by a ″SUPERSEDED REQUIREMENTS″ notice.


FEBRUARY 12, 2010 − UL 142

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DECEMBER 28, 2006 (Title Page Reprinted: February 12, 2010)1 UL 142 Standard for Steel Aboveground Tanks for Flammable and Combustible Liquids The first edition was titled Horizontal and Vertical Aboveground Storage Tanks for Hazardous Liquids. The second edition was titled Aboveground Storage Tanks for Hazardous Liquids. First Edition – December, 1922 Second Edition – October, 1953 Third Edition – May, 1968 Fourth Edition – December, 1972 Fifth Edition –December, 1981 Sixth Edition – September, 1987 Seventh Edition – April, 1993 Eighth Edition – July, 2002 Ninth Edition December 28, 2006 This ANSI/UL Standard for Safety consists of the Ninth edition including revisions through February 12, 2010. The most recent designation of ANSI/UL 142 as an American National Standard (ANSI) occurred on February 11, 2010 ANSI approval for a standard does notinclude the Cover Page, Transmittal Pages, Title Page, or effective date information. The Department of Defense (DoD) has adopted UL 142 on August 11, 1989. The publication of revised pages or a new edition of this Standard will not invalidate the DoD adoption. Comments or proposals for revisions on any part of the Standard may be submitted to UL at any time. Proposals should be submitted via a...
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