scope:

In order to ensure compliance to CFR Part 192 requirements, the PA12 suppliers (Evonik Degussa and UBE Industries) have performed comprehensive testing and evaluation to establish the technical basis for generic heat fusion procedures specific to PA12 piping systems. The PA12 grades used in the test program were classified as PA42316 per ASTM F2785. The specific intent of the testing was to address the following key considerations:

• Establishing the optimum set of butt heat fusion joining parameters which lead to strong joints that can effectively perform over the intended service life;

• Verifying the ability to make strong joints over a range of pipe sizes;

• Verifying the compatibility of cross-fusion using PA12 pipe from the various manufacturers.

In order to address each of these key considerations, extensive sample fabrication and testing was performed at leading independent research institutes and McElroy manufacturing. The comprehensive results of the testing confirm the ability to make strong heat fusion joints using a range of heat fusion parameters. Annex A describes the testing program used to establish the recommended fusion condition ranges.