ASME A112.18.6 pdf download

ASME A112.18.6 pdf download.Flexible water connectors.
a) continuous pressure in accessible locations; and
b) intermittent pressure in recreational vehicles only.
In this Standard, “shall is used to express a requirement, i.e., a provision that the user is obliged to satisfy in order to comply with the standard; “should’ is used to express a recommendation or that which is advised but not required; and “may” is used to express an option or that which is permissible within the limits of the Standard.
Notes accompanying clauses do not include requirements or alternative requirements; the purpose of a note accompanying a clause Is to separate from the text explanatory or Informative material.
Notes to tables and figures are considered part of the table or figure and may be written as requirements.
Annexes are designated normative (mandatory) or informative (non-mandatory) to define their application.
SI units are the units of record In Canada. In this Standard, the yard/pound units are shown In parentheses. The values stated in each measurement system are equivalent in application; however, each system is to be used independently, Combining values from the two measurement systems can result In non-conformance with this Standard.
All references to gallons are to U.S. gallons.
For information on the conversion criteria used in this Standard, see Annex B.
2 Reference publications
This Standard refers to the following publications, and where such reference is made, it shall be to the edition listed below, including all amendments published thereto.
ASME (The American Society of Mechanical Engineers)
5.2.2 Procedure
The intermittent impulse pressure test shall be conducted as follows:
a) Supply water to the specimen In such a manner that the flowing pressure upstream of the specimen does not exceed 517 kPa (75 psi) and the flow rate is 7.6 i 1.9 1/mm (2.0 i 0.5 gpm), at the following temperatures:
i) 82 i 3 C (180±5 ‘F) for flexible connectors intended for hot and cold water applications; and
ii) 49 ± 3 ec (120 ± 5 °F) for flexible connectors intended only for cold water applications.
b) For each cycle, stop the flow and increase the pressure from 517 kPa (75 psi) to 1240 ± 35 kPa (180 ± 5 psi).
c) Cycle the specimen for 100 000 cycles at a minimum of 7 cycles/mm at the following rates:
I) 3 ± 1 s at 517 kPa (75 psI) maximum; and ii) 3 ± 1 sat 1240 ± 35 kPa (180 ± S psi) maximum.
5.3 Burst pressure test
5.3.1 Performance
Flexible connectors shall not leak when subjected to the hydrostatic bur5t pressure test specified in
Clause 5.3.2.
5.3.2 Procedure
The burst pressure test shall be conducted as follows:
a) Fill the specimen with water.
b) For flexible connectors intended
I) for hot and cold water applications, submerge the specimen in water at 82 ± 3 ‘C (180 ± 5 F) for 30 mm. Alternatively, if the medium is air, condition the specimen for 60 mm at ambient laboratory conditions while flowing water at 82 ± 3 ‘C (180 ± 5 ‘F) through It; or
a) only for cold water applications, submerge the specimen in water at 49 ± 3 °C (120 ± 5 °F) for 30 mm. Alternatively, if the medium is air, condition the specimen for 60 mm at ambient laboratory conditions while flowing water at 49 ± 3 UC (120 ± 5 °F) through it.
c) Pressurize the specimen at 1724 ± 35 kPa (250 ± S psi).
d) Hold the specimen at the temperature and pressure specified in Items b) and c) for 30 mm.
e) Remove the specimen from the water; if applicable.
f) Inspect the specimen for leaks while it is still being subjected to the test pressure.
5.4 Pressure drop test
5.4.1 Performance
The pressure drop across the specimen shall not exceed the applicable value specified in Table 1 when It is tested in accordance with Clause 5.4.3. This requirement shall not apply to flexible connectors that
are an integral part of a faucet that complies with ASME A112.8.1/CSA B125.1.
5.4.2 Setup
The test assembly shall be set up in accordance with Part 4 of ANSI/ISA-75.02. The test specimen shall consist of a flexible water connector bent 180’ around a mandrel of the applicable size specified in Table 1.