ISO 19880-5 pdf download – Gaseous hydrogen -Fuelling stations 一 Part 5: Dispenser hoses and hose assemblies.
3.8
pressure rating
maximum pressure at which it Is permissible to operate a component as specified by the manufacturer at the maximum temperature expected during service
3.9
proof pressure
pressure applied during a non-destructive test and held for a specified period of time to prove the integrity of the construction
4 ClassificatIon
This clause applies to newly manufactured hoses and hose assemblies For dispenser hoses connecting the dispenser to the fuelling nozzle supply port.
Hoses and couplings shall meet the requirements in this document with end fittings selected by the manufacturer, customer or testing agency as required to connect to the test equipment. Fittings shall be consistent with the requirements of the appropriate documents in the ISO 191380-series, ISO 17268. or Iso 15649.
The end fitting of the hose assembly may he changed to another type that meets requirements defined above without the need to repeat the performance tests for verification of the hose assembly and its coupling as long as the hose coupling remains unchanged.
Some newly manufactured hoses and hose assemblies Include vent lines required by some fuelling nozzles. Nozzle vent hose assemblies shall meet the requirements of ISO 16964 or the requirements in this document and be appropriately rated for operation in the vent system that has been defined based on the nozzle manufacturer instructions and the dispenser design
Tablel converts Hydrogen Service Levels (HSL), as defined in ISO 19880-1, to pressure levels.
When using ISO 16964, the hose rating is 125 % of the working pressure which is 10% lower than the pressure ratings in Table.
A hose assembly shall be designated according to the pressure classes defined in T4blc I or by the manufacturer’s stated pressure rating. The information in Table 1 is taken from ISO 19880-1 (and pressure class Hii is added). The pressure rating of the hose assembly shall be equal to or above the dispenser pressure ratings. For further information regarding the relationships between pressure terms, see ISO 19880-I.
Leakage can be tested by the permeation test during the first 15 mm according to Method A.
The air contained in the reinforcement layer (trapped air), which comes out from perforated holes, can
be omitted unless they are abnormal.
7.3 Hydrostatic strength
7.3.1 Proof pressure test
When tested in accordance with ISO 1402, a hose assembly shall withstand a pressure of at least 2,1 z HSL for 5 men without bursting or visible loss of fluid.
As a test fluid, water or a mixture of water and glycol or oil can be used. This is a non-destructive test,
7.3.2 Ultimate strength
The hose assembly shall be air oven aged For 70 hat 85°c ± 1 °C.
Following the oven aging, when tested in accordance with ISO 1402, a hose assembly shall withstand without bursting or visible loss of fluid with a pressure of a minimum of S times of HSL for 5 mm. Then, continue to pressurize until the hose assembly bursts and measure the pressure.
As a test fluid, water or a mixture of water and glycol or oil can be used. This is a destructive test.
7.4 Electrical conductivity
When determined in accordance with ISO 8031:2009, 4.8, the bonding resistance of fuelling hose assembly, from end fitting to end fitting, shall be no greater than 100 kIt, in order to dissipate static electricity.
This test shall be conducted with the hose unpressurized.
The bonding resistance of the tuelhng hose assembly may need to be no greater than 1 ku for manufacturing quality control.
ISO 19880-5 pdf download – Gaseous hydrogen -Fuelling stations 一 Part 5: Dispenser hoses and hose assemblies
