ASTM WK44403

    Work Item: ASTM WK44403 - Revision of D3771 - 03(2007) Standard Specification for Rubber Seals Used in Concentrating Solar Collectors

    (What is a Work Item?)

    Active Standard: D3771 - 03(2007)

    Developed by Subcommittee: D11.37 | Committee D11 | Contact Staff Manager



    1. Rationale

    Section 5.1.2.2 This section requires revision to a) update the information on the temperature of immersion water in xenon arc exposure apparatus and b) correct the information on the temperature of the spray water which is confusing to an auditor checking the laboratory conditions specified for the test. The current wording on spray water temperature contains both non mandatory language (typically) and a specific tolerance required (21 +/-5oC). Revise as shown below. Delete the original text shown as cross-outs and add the underlined blue text. The editorial changes to Note 5 below are suggested for clarification. Tables 1 and 2- Although resistance to solar radiation (desert outdoor exposure) or to simulated solar radiation (xenon arc laboratory exposure) is required, this require- ment is missing in Tables 1 and 2. Because the resistance is not to solar radiation alone, but also to other environmental conditions, including moisture and heat, it should be listed in the tables as Resistance to Environmental Conditions or to Simulated Environmental Conditions.


    Keywords

    concentrating solar collectors; preformed seals; rubber; sealing compounds; Rubber--specifications; Rubber seals--specifications; Solar collectors--specifications; Solar heating/cooling systems--specifications; Solar materials/applications--specifications;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    12-13-2013

    Technical Contact:
    Norma Searle

    Item:
    013

    Ballot:
    D11 (14-01)

    Status:
    Negative Votes Need Resolution