SYMPOSIA PAPER Published: 01 January 2011

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


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.

Author Information

Volgstadt, Frank
Volgstadt and Associates, Inc., Madison, OH
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Developed by Committee: F17
Pages: 289–308
DOI: 10.1520/STP49518S
ISBN-EB: 978-0-8031-8892-1
ISBN-13: 978-0-8031-7514-3