Corrugated Stainless Steel Tubing (CSST) is thinner than traditional
black iron gas pipelines and can be perforated when exposed to the
high voltages associated with nearby lightning strikes. Perforation can
lead to gas leakage and possible ignition.
The National Fire Protection Association (NFPA) has recently
determined that the existing bonding requirements in the NFPA gas
code (NFPA 54) do not provide adequate protection from lightning induced
surges and subsequent gas leakage.
For this reason, LPI strongly recommends that in facilities equipped
with CSST the requirements of NFPA 54 should be supplemented by
additional bonding between the CSST lines and the lightning protection
LPI and LPI-certified installers do not warrant that additional bonding
will absolutely prevent perforation, given the inherent susceptibility of
CSST. However, following these additional measures represents best
practice until such time that technically-verified CSST product data is
developed and test-based standard are adopted to remediate this
For additional information, visit the Lightning Protection Institute website.
(courtesy of Lightning Protection Institute)