CSST Approvals and Testing

CSST Approvals and Testing

CSST piping is recognized by code and certifying bodies responsible for approving material used in piping gas into residential and commercial buildings. It is important to note that rigid copper and black iron pipe—which is usually imported from foreign manufacturers without quality control—is not tested nor listed to any national standards for gas piping.

CSST piping is accepted by model codes including the National Fuel Gas Code (NFPA-54), International Fuel Gas Code (IFGC), and Uniform Plumbing Code (UPC). Additionally, certain brands of CSST are Factory Mutual (FM) listed for seismic resistance. CSST is approved for use in all 50 states.

CSST piping sold in the U.S. is also listed to ANSI LC 1-2005. The ANSI LC-1 product standard lists a number of stringent material and performance testing requirements to assure that the product can demonstrate its use as a flexible piping product. These tests include:

  1. Flexibility

  2. Torsion

  3. Impact resistance

  4. Leakage

  5. Fire resistance

  6. Environmental resistance (resistance to corrosion and freeze/thaw)

  7. Axial load

  8. Strike protection

  9. Flow capacity

  10. Pressure capacity

  11. Crush strength


20 Years of Safety

As the only gas piping technology approved by ANSI and other national standards, Corrugated Stainless Steel Tubing (CSST) has been installed in millions of homes with an outstanding safety record.

Rigid Pipe Kills

Two natural forces affect gas piping: earthquakes and lightning strikes.