TL_680.pdf
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1、Klass.-Nr. 55 16 3May 2004 Coolant Hoses with Reinforcement Material Requirements and Functional Requirements TL 680 Konzernnorm Descriptors:coolant hose, hose, elastomer connection, reinforcement, reinforcing substrate, EPDM compound Page ? Fachverantwortung/ResponsibilityNormung/Standards (EZTD, 1
2、733) K-QS-31Dr. OeffnerTel: 36831Frau KrenzTel: +49-5361-9-48869Sobanski Confidential. All rights reserved. No part of this document may be transmitted or reproduced without the prior written permission of a Standards Department of the Volkswagen Group. Parties to a contract can only obtain this sta
3、ndard via the responsible procurement department. VOLKSWAGEN AG Norm vor Anwendung auf Aktualitt prfen / Check standard for current issue prior to usage. Form FE 41 - 01.03 Changes The following changes have been made as compared to Technical Supply Specification TL 680, 1999-09: ?Referenced standar
4、ds updated ?Standard restructured Previous issues 1968-03; 1969-01; 1971-12; 1974-07; 1976-03; 1978-07; 1980-01; 1983-05; 1990-12; 1991-06; 1993-09; 1995-05; 1999-09 1Scope This TL stipulates the material and functional requirements for coolant hoses with reinforcement. These are used as elastomer c
5、onnections in the coolant circuit. Temperature range:-40 C to +135 C Operating pressure:Passenger car: 0 bar to 2.0 bar over-pressure according to the drawing Commercial vehicle: 0 bar to 2.4 bar over-pressure according to the drawing 2Designation EPDM according to TL 680 / 2.0 bar or EPDM according
6、 to TL 680 / 2.4 bar 3Requirements 3.1General requirements Approval of first supply and changes according to Volkswagen standard VW 011 55. Avoidance of hazardous substances according to VW 911 01. 10 finished parts are necessary for the testing of the larger type and 20 finished parts are necessary
7、 for testing of the smaller type. 3.2Types According to drawing; deviating requirements called out in drawings take precedence over this TL standard. The English translation is believed to be accurate. In case of discrepancies the German version shall govern. June 2008 Changes The following changes
8、have been made as compared to TL680:2004-05: - Note for restricted usage added Standard will become invalid, use for new designs and drawing modifications is no longer permitted. Normung/Standards (EKTC, 1733) Ms. Hager-Sss Tel:+49-5361-9 49035Terlinden Page 2 TL 680: 2004-05 3.3Identification accor
9、ding to VDA 260 EPDMEPM 150,000 LC; all hoses functional ?Pressurizing fluid100% coolant additive acc. to TL 774 D ?Temperature of the mediumTM= (135 - 5) C ?Test pressurep = 2.0 bar: 1.05 0.95 bar over-pressure p = 2.4 bar: 1.25 1.15 bar over-pressure ?Test chamber temperatureTCh= 85 + 5 C ?Pulsati
10、ng pressure frequency0.5 to 1.0 Hz sinusoidal 4.1.2Static long-term test For hoses with PP or PA components. ?Test temperatureTO= 135 - 5 C ?Internal test pressurep = 2 bar over-pressure ?Pressurizing fluidCoolant : water = 60 : 40 Cool down to room temperature for 1 h every 170 hrs, raise temperatu
11、re again to TO, check leak tightness. Determine residual load carrying capacity after t = 1,500 h: pulsating pressure test to fracture, desired values N - 2 s 30,000 LC. 5Notes on testing 5.1Aging at elevated temperature S3A standard specimens according to DIN 53504, which have been removed from the
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