Pressure Rating
Pressure rating tests have been conducted to ensure performance and reliability under the appropriate conditions.
Pull-Out Test of the Compression Fittings connected with PE Pipes:
The entire assembly body with pipe is tested for pull-out force in relation to the pressure rating of the connected pipe (eg. Coupling 63mm tested with a pull-out force of II,256 N when connected with PNI6 pipe, without any failure).
Internal Pressure Test of Compression Fitting Body:
All metric pipe fitting bodies are tested under hydrostatic pressure at 20ºC, 2.5 times the indicated pressure rating of the fitting (eg. COUPLING 20mm tested for one hour at 40 bar without any failure).
All compression fitting bodies are also tested under long-term hydrostatic pressure at 95ºC, 0.4 times the indicated pressure rating of the fitting (eg. 90º TEE 50mm is tested for 1000 hours at 6.4 bar without any failure).
Internal Pressure Test of Compression Fitting fixed with PE Pipes:
The entire assembly body with pipe, is tested in long-term under hydrostatic pressure at 40ºC, 0.8 times the indicated pressure rating (eg. 90º Elbow 40 mm is tested for 1000 hours at 12.8 bar without any failure)
Leak Tightness under Bending:
The entire assembly body with pipe, tested by bending the pipe on the prescribed radius under hydrostatic pressure at 20º C, 1.8 times the indicated pressure rating (Eg. MALE ADAPTOR 20mm is tested for I hour at 28.8 bar without any failure).
Leak Tightness against Low Pressure:
The entire assembly body with pipe, is tested at negative pressure or vacuum at 20º C (eg. End Plug 25mm tested for I hour at -0.8 bar followed by -0.2 bar without any failure).
Pressure Drop (Head losses)
To determine the total pressure drop in the system, the total straight pipe length calculated for the poly pipe fittings is added to the total straight pipe length to obtain the total drop. The pressure drop in compression fittings can be calculated with the following formula:
L = ID x K
L = Head loss based on equivalent pipe length (m)
ID = Pipe inner diameter (m)
K = Fitting constant as shown on table
