UFC 4-390-01
23 July 2003
or exceeds the system operating pressure. The soft goods (e.g.
O-rings, gaskets) contained in the valves should be compatible
with the system fluid.
Consult manufacturer's literature for recommendation on routine
maintenance.
Ball Valves should be used in "on/off" applications and should
not be used for throttling.
Globe/Plug Valves should be used in locations where throttling is
necessary.
Needle Valves should be used in by-pass applications and where
precise control is needed.
B.8.2.3 Piping Component Testing. All piping system components
should be subjected to adequate strength and leak tests to ensure
that the system is safe. The requirements for material OQE and
component testing are given in Appendix C. All test results must
be formally documented and available for SCA review during on-
site surveys.
B.8.3 General Considerations for Piping Systems. It is
essential that all seals, gaskets and o-rings in unmanned
pressure test facilities be fabricated from the proper material.
Gaskets containing asbestos material should not be used without
approval of the SCA.
B.8.3.1 Identification and Labeling. All piping and components
including fittings should be identified in sufficient detail on
the system drawings (i.e., description, material, part number,
pressure rating) to prevent replacement with an unsuitable part.
Unless specifically exempted by the SCA, all hoses, valves,
pressure vessels, gages, filters, etc., must be marked or labeled
to indicate function and content.
Unless authorized by the SCA, all piping and piping system
components used for the transmission or monitoring of liquid or
gas within a system should be marked and color-coded to identify
the specific gas or liquid contained and the direction of flow.
Where piping is located behind a panel, an accurate schematic
should appear on the panel. Color-coding of piping systems not
identified in Table B.2 should be negotiated with the SCA. A
labeling system should be used to identify each component by type
of gas or liquid, by color and by word or letter symbol.
Table B.2.
Suggested Color Code And Component Designation
For Unmanned Pressure Test Facilities
Gas System
Designation
Color Code
88
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