SPIRO-LOC Leakage
The longitudinal (spiral) four ply seam and the circumferential traverse joints in the Spiro-loc should be sealed after installation to the various pressure rating requirements of standards used in the HVAC industry.
Such standards are SMACNA and AS 4254. We recommend that the SMACNA high- and low-pressure ducting standards are followed for sealing requirements. Where leakage is critical, e.g. in high pressure conditioned air supply ducts, each length should be inspected for either impact or fatigue damage. Any looseness of the seam will allow the pipe length to bend slightly under its own weight when lifted by its ends. If the section is not rigid it should not be used in critical high-pressure locations.
Hanger and Support Consideration
The selection of a hanging system should take into consideration the possibly disastrous consequences of its failure. It is a characteristic of any multiple hanger system, that the failure of one hanger transfers that hanger’s load to adjacent hangers. If one of these fails, then an even greater load is transferred to the next and so on. The result is a cascading failure in which an entire run of duct might fall.
