STP1528: Yesterday, Today, and Now: Polyamide-11 Gas Piping at 200 psig under the New Rules

    Volgstadt, Frank
    Volgstadt and Associates, Inc., Madison, OH

    Pages: 20    Published: Jan 2011


    Abstract

    This paper will explore and explain the Dec. 24, 2008, PHMSA rulemaking resulting in revisions to 192.123, permitting the use of polyamide-11 (PA-11) plastic gas piping in gas distribution systems at pressures of up to 200 psig using a design factor of 0.4 without waivers or special permits. The paper will also explore (1) PA-11 properties and attributes; (2) PA-11 and polyethylene piping in complimentary but not competing plastic gas piping applications; (3) PA-11 piping as a cost effective alternate to steel piping; (4) updates on some existing, special permit (waiver) installations made prior to the Dec. 24, 2008, rulemaking; (5) standard PA-11 installations as well as unique applications into which PA-11 piping is being introduced; and (6) how to install PA-11 piping.

    Keywords:

    polyamide-11, PA-11, gas pipe, plastic pipe, high pressure, gas distribution, nylon-11


    Paper ID: STP49518S

    Committee/Subcommittee: F17.67

    DOI: 10.1520/STP49518S


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