How safe is Corrugated Stainless Steel Tubing?

New interviews and documents obtained by NBC 5 Dallas-Fort Worth Investigates raise more questions about how well one manufacturer-recommended safety measure prevents lightning-related fires involving flexible gas lines and questions how often those fires happen.

Earlier this year, an NBC 5 investigation into the safety of yellow corrugated stainless steel tubing, or CSST, showed how some fire investigators said energy from lightning has punched holes in the tubes, releasing gas and starting fires.