Specs, UL&cUL

We offer ASTM A135/A795 SCH 7,10,40 UL&cUL listed external galvanized/internal black hot-rolled steel fire sprinkler pipes in various sizes, including 1-1/2", 2", 2-1/2", 3" and 4". According to statistical data, MIC in fire sprinkler pipes almost always occurs in pipes smaller than 2-1/2". Therefore, using small-sized Corrosion (MIC) - Preventing Steel Fire Sprinkler Pipes is sufficient for prevention, while larger-sized pipes can use standard fire sprinkler pipes.

UL&cUL Listed: Yes (UL 852), EX15151. The following is UL document.

FM Approvals status. Our product configuration (UL & cUL listed steel sprinkler pipe with an clean interior) is not currently within an FM Approvals program scope. This is not the result of a failed test, but a scope mismatch. For AHJ-reviewed projects, we provide a complete acceptance package—including UL & cUL listing, O₂ ≤ 2% inerting logs (WPNI, supplied by Tyco, ECS, Potter, or equivalent), NFPA 13 air-venting and a Clean-Pipe Evidence Pack—so reviewers can make an informed approval based on documented outcomes.