Standard Test Method for Pressure Rating Poly(Vinyl Chloride) (PVC) Plastic Pipe Fittings, Schedule 40 and 80 Socket-Type

Importancia y uso:

4.1 The procedure for establishing the long-term pressure rating of fittings starts with an extrapolation of a regression line that is based on fitting failure data with respect to time, when assemblies are tested in accordance with Test Method D1598. The pressure-versus time to failure data are obtained using water at 73 °F in assemblies that are immersed in a water or air environment. The extrapolation is made in such a manner that the long-term hydrostatic pressure rating is determined for these conditions.

4.2 The pressure design basis is determined by considering the following items and evaluating them in accordance with 6.3.

4.2.1 Long-term hydrostatic pressure-strength at 100 000 h,

4.2.2 Long-term hydrostatic pressure-strength at 50 years

4.3 The fitting pressure rating may be calculated by multiplying the pressure design basis (PDB) by the appropriate design factor (DF).

Subcomité:

F17.40

Volúmen:

08.04

Número ICS:

23.040.45 (Plastic fittings)

Palabras clave:

PVC socket fittings; pressure rating; method;