BSR GPTC Z380.1-2022 TR 2017-39-202x Bubbles in Pipe Wall 1

When operators see bubbles in the fusion melt pattern and suspect that liquid hydrocarbons are present in the PE pipe, either from the Regardless of whether suspected liquid hydrocarbons is a result of surrounding soil environment or from liquid in the gas stream contents of the pipe, only mechanical couplings should be used for the joint and considered instead of heat fusion joining methods shoul. [...] The Further, the operator should then assess the pipeline’s operating conditions and determine whether an adjustment to the design pressure is necessary per 4.2 of the guide material under §192.1213. [...] Note: In the case of socket and saddle fusion, the melt pattern only indicates the presence of bubbles in the outer wall. [...] If the operator visually sees bubbles in the PE pipe melt pattern or the fusion bead has a rough, pockmarked surface appearance, this might be an indication that liquid hydrocarbons have permeated the outer pipe wall. [...] If the operator suspects that liquid hydrocarbons have penetrated the PE pipe wall, see 4.2 of the guide material under §192.1213 regarding the effect of liquid hydrocarbons on design pressure.