Page 11 - CPVC Fire Sprinkler Products Installation Instructions & Technical Handbook
P. 11

BLAZEMASTER CPVC pipe and fittings have been successfully installed encased in concrete for many years. Lubrizol is unaware of any problems that have been caused by chemical incompatibility between BLAZEMASTER pipe and fittings and concrete or any chemicals that have been added to concrete. Since new construction materials are regularly introduced to the market, however, you may have questions regarding the compatibility of the products you’re using. To help ensure a successful installation, Lubrizol recommends contacting the manufacturer of the chemical to confirm chemical compatibility.
• Steps must be taken to prevent the wire mesh or reinforcing bars from 2 causing any abrasion damage to the TYCO CPVC Pipe and Fittings (see Handling and Storage section). This is mostly of concern prior to pouring the concrete. TYCO CPVC Pipe and Fittings shall not be installed in concrete that is to be post tensioned. The post tensioning process can create excessive forces which can damage the TYCO CPVC piping system.
• When there are pipe joints that will be covered in concrete, the installation shall be pressure tested prior to pouring the concrete. If there will not be any joints covered by concrete, there is no need to pressure test the system prior to pouring the concrete.
• Prior to the pouring of the concrete, the TYCO CPVC pipe shall be intermittently secured to prevent movement during this process. Nonabrasive, plastic fasteners are good choices for this application. When hangers are used, most metal hangers designed for metal pipe are suitable for TYCO CPVC pipe. Do not use undersized hangers. Hangers with sufficient load bearing surface shall be selected based on pipe size (e.g., 1 1/2 in. hangers for 1 1/2 in. pipe). The hanger shall not apply compressive load or have rough or sharp edges that come into contact with the pipe.
• Care shall be taken so that the TYCO CPVC Pipe and Fittings are not damaged by the tools and equipment used to pour and finish the concrete. All standard methods of pouring concrete onto the ceiling construction with concrete pumps or concrete containers followed by compaction with vibrators can be used in combination with TYCO CPVC sprinkler systems. TYCO CPVC Pipe and Fittings shall not come into contact with equipment such as tampers and agitators.
• As the concrete is poured, assure that the pipe has not moved from its intended positioning.
• Thermal expansion and contraction is not an issue for TYCO CPVC Pipe and Fittings that are embedded in concrete. Those forces are relieved in a manner that does not affect the pipe or fittings. However, expansion and contraction shall be incorporated in the design of those sections of pipe that are not embedded in concrete. Failure to adequately allow for stress at these points may result in damage to the pipe where it enters and exits the concrete.
NOTE: It is recommended that when transitioning from embedded to not embedded in concrete that 6 in. of 1 in. compatible foam pipe insu- lation be installed around the embedded pipe.

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