6.1 Production Conditions
Pipes, fittings, valves and accessories shall be manufactured in an environment equivalent to, or meeting the requirements of a
Quality Assurance System such as ISO 9001.
Pipes, fittings, valves and welding machines shall be supplied from one manufacturer, GF Piping Systems to ensure correct and
proper jointing between components and uniform chemical and physical properties of the piping system.
6.3 Handling of Material
- Material shall be stored in original packaging and protected from environmental damage until installation.
- Pipe shall be supported sufficiently to prevent sagging. Care shall be taken not to gouge or otherwise notch the pipe in excess of 10% of the wall thickness.
6.4 Training, Certification and Installation
- Site personnel, permissible for PE piping installation, shall undergo training and certification according to manufacturer’s published guidelines prior to performing any jointing operations on site.
- The system shall be tested in accordance with the manufacturers’ recommendations.
- Following is a general test procedure for GF Piping Systems. It applies to most applications. Certain applications may require additional consideration. For further questions regarding your application, please contact your local GF representative.
1. All pressure tests should be conducted in accordance with the appropriate building, plumbing, mechanical and safety codes for the area where the piping is being installed.
2. When testing plastic piping systems, all tests should be conducted hydrostatically and should not exceed the pressure rating of the lowest rated component in the piping system (often a valve). Test the system at 150% of the designed operational pressure. (i.e.: If the system is designed to operate at 80PSI, then the test will be conducted at 120PSI.)
3. When hydrostatic pressure is introduced to the system, it should be done gradually through a low point in the piping system with care taken to eliminate any entrapped air by bleeding at high points within the system. This should be done in four stages, waiting ten minutes at each stage (adding ¼ the total desired pressure at each stage).
4. Allow one hour for system to stabilize after reaching desired pressure. After the hour, in case of pressure drop, increase pressure back to desired amount and hold for 30 minutes. If pressure drops by more than 6%, check system for leaks.
Note: If ambient temperature changes by more than 10
F during the test, a retest may be necessary.