Specifications include, but are not limited to: Cured-In-Place Pipe (CIPP) liners are lining an existing culvert by either pulling or inverting a resin-impregnated fabric tube and curing the tube in place. When CIPP liners are specified, the liner system supplied by the Contractor shall conform to the following requirements as supported by submitted design calculations: • Shall list host pipe diameter ranges for which the product is applicable. • Shall indicate corrosion potential/acid reaction potential. • Shall provide hydraulic calculations comparing existing culvert to proposed culvert liner. • Shall provide structural calculations. • Shall list cure method (e.g., UV, steam, hot water, etc.). • Shall list typical, minimum, maximum application thicknesses. • Shall provide proof of initial Manning’s Number (n value for roughness in open channel flow) of product • Calculated minimum thickness of liner • Designation of air or water inversion or pull-in-place method • Maximum allowable pulling force • Site specific cure time • Minimum pressure to hold liner tight against the host pipe • Maximum pressure to ensure liner does not sustain damage • Maximum and minimum cure temperatures • Ambient temperature range allowable during installation • Post cure temperature • Temperature cure profile. • Sample of temperature and pressure log to be used for monitoring the curing process • Certification on manufacturer's letterhead indicating that the contractor is approved by the fabric tube and resin manufacturer to perform CIPP installation work. • Manufacturer moisture limitations (e.g. installation in the dry, humidity restrictions, etc.). • Material safety data sheets for all hazardous chemicals that will be used on the job site including resin, catalyst, cleaners, and repair agents. Identify the proposed use for each hazardous chemical and where it will be used in the work. • Must provide and comply with specification for installation, and provide NCDOT Type 1 or Type 4 Certificates of compliance with material specifications as applicable to the below, or equivalent as approved by the Engineer: o ASTM D5813 o ASTM F1216 for inverted CIPP o ASTM F1743 for pulled-in-place CIPP o ASTM F2019 for pulled-in-place GRP CIPP o ASTM F2599 for sectional inverted CIPP (applies to pipe sections, not full length) • Long Term Modulus of Elasticity for calculations = 150,000 psi. NCDOT Type 2 or Type 5 certifications may be submitted by vendors or contractors for proof of alternate Long Term Modulus of Elasticity extrapolated from ASTM D2990, 10000-hour test. Design value of Long Term Modulus of Elasticity may be no greater than 50% of Initial Modulus of Elasticity. Tested value must be greater than or equal to value used in design equations. • Initial Modulus of Elasticity for calculations = 300,000 psi. NCDOT Type 2 or Type 5 certifications may be submitted by vendors or contractors for proof of alternate Initial Modulus of Elasticity based on ASTM D790. Tested value must be greater than or equal to value used in design equations. • Long Term Flexural Strength = 2250 psi. NCDOT Type 2 or Type 5 certifications may be submitted by vendors or contractors for proof of alternate Long Term Flexural Strength extrapolated from ASTM D2990, 10000-hour test. Tested value must be greater than or equal to value used in design equations.
