Flame/Smoke Containment Pipe
GF Harvel FlameTech has been developed for use as containment piping in visual leak detection systems in areas where flame spread and smoke generation are of concern
(i.e., containment piping installed in return air plenum applications). Major building and mechanical codes require that combustible piping installed within an air plenum must have a maximum flame spread of 25 and a maximum smoke development rating of 50. Based on large-scale burn testing of finished piping products conducted by ULC, GF Harvel FlameTech piping meets this fire performance requirement and is Listed by ULC for surface burning characteristics.In addition to excellent fire performance properties, GF Harvel FlameTech translucent piping offers good optical qualities. This enables its use as containment piping for high-purity piping runs where quick identification of primary tubing and visual leak detection are critical. Primary tubing can be readily identified and inspected visually through the pipe wall. Utilizing a flashlight or alternate light source greatly enhances this unique attribute.
Fire Performance Rating
GF Harvel FlameTech piping has been evaluated and Listed for Surface Burning Characteristics by Underwriters Laboratories of Canada (CAN/ULC Standard S102.2). This is a large-scale test conducted on 24-foot lengths of dry piping to evaluate flammability characteristics compared to known non-combustibles (asbestos cement board) and known combustibles (red oak). GF Harvel FlameTech piping has a maximum flame spread rating of 10 and a maximum smoke generation of 35-50 when tested in accordance with this standard. Testing has shown that GF Harvel FlameTech piping meets the maximum flame spread (25) and maximum smoke generation (50) values for combustible materials installed within an air plenum as called out by major building codes. GF Harvel FlameTech out-performs the fire performance characteristics of alternate plastic piping materials typically used for visual leak detection.
As a listed product, each pipe length is marked with the flame spread and smoke generation values for easy identification in the field.
Contact GF Harvel Technical Services Department at (610) 252-7355 for additional information concerning the fire performance properties of GF Harvel piping products.
GF Harvel FlameTech piping is produced from a new version of clear PVC material that has been optimized to address fire performance issues. As a result, this product exhibits characteristics similar to those of conventional GF Harvel Clear piping with regard to joining techniques, field fabrication, chemical resistance, and other beneficial physical properties. GF Harvel FlameTech piping is heat-formable for on-site fabrication of belled ends, sweeps and bends. The maximum service temperature of this product is 140°F. Refer to GF Harvel HPB-107 Clear bulletin for basic physical properties, fabrication guidelines and additional information.
FlameTech piping is joined using conventional PVC solvent cement joining techniques, providing a quick, strong, leak-tight seal. GF Harvel recommends the use of a clear, medium-bodied, fast-setting PVC cement in conjunction with a clear primer for optimum joint integrity such as IPS Weld-On 705 Clear solvent cement and IPS Weld-On P-70 Clear Primer. Details on proper solvent cementing techniques are available and must be reviewed for proper assembly and joint integrity. GF Harvel FlameTech piping is compatible with Clear PVC piping components and/or standard PVC fittings, and can be incorporated into existing PVC containment systems via the solvent cement joining process.
Hangers and Supports
Support location and spacing are dependent on the pipe diameter, operating temperature of the system and the location of any concentrated stress loads (i.e., valves, and any other heavy system components). Proper support location is critical to ensure deflection is kept to a minimum. Hangers used must have an adequate load-bearing surface free of any rough or sharp edges that could damage the pipe. They must also not restrict linear movement of the system due to the effects of thermal expansion and contraction.
Systems utilizing GF Harvel FlameTech piping are to be designed and installed using existing industry standards for the installation of rigid thermoplastic piping. Factors such as operating temperatures, proper support spacing, chemical resistance, thermal expansion and contraction, handling and storage, and joining must be taken into consideration and addressed with appropriate design techniques. The use of this product to address code compliance issues regarding any local, state, or national code requirements concerning its use is the responsibility of the end user. Additional information is available from GF Harvel.
Although GF Harvel FlameTech maintains its physical properties when exposed to many substances, exposure to certain chemicals can affect the clarity of the pipe over time. Certain nitrogen-containing organics, bleaches, oxidative agents and acids may result in discoloration. Exposure to sunlight (U.V.R.) will also affect clarity. These facts should be considered and testing under actual use conditions is recommended. GF Harvel does not recommend the use of this product for pressurized fluid applications or for the transportation or storage of compressed air or gases. Standard threading or grooving of GF Harvel FlameTech is not recommended due to insufficient wall thickness.