1、 AEROSPACE STANDARD TUBE BEND RADII AS33611Copyright 2015 SAE International All rights reserved. No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, photocopying, recording, or otherwise, without the prior w
2、ritten permission of SAE. TO PLACE A DOCUMENT ORDER: Tel: 877-606-7323 (inside USA and Canada) Tel: +1 724-776-4970 (outside USA) Fax: 724-776-0790 Email: CustomerServicesae.org SAE WEB ADDRESS: http:/www.sae.org ISSUED 1997-08REAFFIRMED2015-04THIRD ANGLE PROJECTION CUSTODIAN: G-3 FEDERAL SUPPLY CLA
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5、se visit http:/www.sae.org/technical/standards/AS33611 RATIONALE AS33611 HAS BEEN REAFFIRMED TO COMPLY WITH THE SAE FIVE-YEAR REVIEW POLICY. This document has been taken directly from U.S. Military Standard, MS33611A, and contains only minor editorial and format changes required to bring it into con
6、formance with the publishing requirements of SAE technical standards.The original Military Standard was adopted as an SAE standard under the provisions of the SAE Technical Standards Board (TSB) Rules and Regulations (TSB 001) pertaining to accelerated adoption of government specifications and stand
7、ards. TSB rules provide for (a) the publication of portions of unrevised government specifications and standards without consensus voting at the SAE Committee level, (b) the use of the existing government specification or standard format, and (c) the exclusion of any qualified product list (QPL) sec
8、tions.NOTICEAEROSPACE STANDARD AS33611 SHEET 2 OF 3 TUBE BEND RADII FIGURE 1 - TUBETABLE I - BEND RADII FOR CRES AND ALUMINUM TUBINGNOTES:1. FLATNESS IN THE AREA OF A TUBE BEND SHALL BE DEFINED BY THE FORMULA2. THE BENDS WITH WALL THICKNESS PER TABLE II, WHEN USED IN FLUID SYSTEMS WITH WORKING PRESS
9、URES OF 1500 psi OR GREATER, SHALL NOT EXCEED FLATNESS VALUES OF:a. 5% FOR CRES OR ALUMINUMb. 3% FOR TITANIUM, COMMERCIALLY PURE AND COLD WORKED, STRESS RELIEVED.3. TUBE FLATNESS FOR FLUID SYSTEMS WITH WORKING PRESSURES LESS THAN 1000 psi SHALL NOT EXCEED 10% FOR CRES AND ALUMINUM AND 5% FOR TITANIU
10、M.4. FLATNESS LIMITATIONS APPLY TO BEND RADII LISTED ON THIS STANDARD. APPLICABILITY TO OTHER BEND RADII SHOULD BE VERIFIED BY TESTING.FLATNESS %MAX. OD MIN ODNOMINAL OD-x100=AEROSPACE STANDARD AS33611 SHEET 3 OF 3 TUBE BEND RADII NOTES (CONTINUED):5. USE OF SMALL BENDS (LESS THAN 3D) IN HYDRAULIC,
11、PNEUMATIC AND AIRCRAFT FUEL SYSTEMS REQUIRE THE APPROVAL OF THE PROCURING SERVICE. FOR OTHER FLUID SYSTEMS (LESS THAN 1500 psi) THE SPECIAL BEND RADII COLUMN MAY BE USED.6. THIS IS A DESIGN STANDARD. NOT TO BE USED AS A PART NUMBER.TABLE II - HIGH STRENGTH 3000 psi TUBING WALLS AND BEND RADIINOTE: TUBING WALL THICKNESS LESS THAN .020 INCH REQUIRE THE APPROVAL OF THE PROCURING SERVICE.FIGURE 2 - INSPECTION AREATABLE III - PERMISSIBLE WRINKLES AND SCRATCHES IN BENDS
