Spray Applied Pipelining

Spray Applied Pipe Lining (SAPL), formerly known as Spray In Place Pipe (SIPP), is a trench-less technology pipe renewal method that sprays layers of polymeric. This is also known as cementitious liner inside the deteriorated pipe to provide longer service life. This service has been known to allow another 50 years of design service life. Amongst different SAPL materials, polymeric SAPLs have superiority due to their higher level of chemical resistance, corrosion protection, and tensile strength. Compared with the conventional open-cut method, polymeric SAPL method is up to 70% less costly making Spray Applied Pipe Lining unbeatable substitute to conventional methods.

SAPLs are separated from conventional coatings. Coatings are considered as barriers for corrosion protection. Linings are used for both corrosion protection and structural enhancement. In comparison with other pipe renewal (rehabilitation) methods, polymeric SAPL cures faster, has less construction foot print, it is more cost-effective, environmental friendly and leaves no annular gap as it is compatible with the complex geometries.

SAPL Technical Studies

Multiple national-level research studies have been conducted by different researchers and institutions that investigated the structural performance of the polymeric SAPL. Investigation shows that the polymeric SAPL can increase the service load carrying capacity of a fully invert corroded culvert up to 800%.