Wash. Admin. Code § 296-59-080 - Installation, inspection, and maintenance of pipes, piping systems, and hoses
(1) Design and
installation. All new piping systems intended to be used in hazardous material
service must be designed and installed in accordance with applicable provisions
of the ASME Code for Pressure Piping or in accordance with applicable
provisions of ANSI B31.1 through B31.8. The referenced edition in effect at the
time of installation must be utilized.
Note: Both referenced standard have identical requirements.
(2) Inspection
and maintenance.
(a) Management must develop
a formal program of inspections for all hazardous material piping systems. The
program must be based on sound maintenance engineering principles and must
demonstrate due consideration for the manufacturing specifications of the pipe,
hose, valves, and fittings, the ambient environment of the installation and the
corrosive or abrasive effect of the material handled within the
system.
(b) Type and frequency of
tests and/or inspections and selection of inspection sites must be adequate to
give indications that minimum safe design operating tolerances are maintained.
The tests may include visual and nondestructive methods.
(c) You must submit your formal program of
initial and ongoing inspections to the department for approval within one year
after the effective date of this requirement.
(d) All existing hazardous material systems
must be inspected to the criteria of this section prior to two years after
effective date, or in accordance with a schedule approved by the
department.
(3)
Inspection records.
(a) Results of inspections
and/or tests must be maintained as a record for each system.
(b) Past records may be discarded provided
the current inspection report and the immediate preceding two reports are
maintained.
(c) When a system is
replaced, a new record must be established and all past records may be
discarded.
(d) The records for each
system must be made available for review by the department upon
request.
(e) You may omit the
inspection requirements for portions of existing systems that are buried or
enclosed in permanent structures in such a manner as to prevent exposure to
employees even in the event of a failure.
(4) Systems or sections of systems found to
be below the minimum design criteria requirements for the current service must
be repaired or replaced with component parts and methods which equal the
requirements for new installations.
(5) Identification of piping systems.
(a) Pipes containing hazardous materials must
be identified. It is recommended that USAS A13.1 "Scheme for Identification of
Piping Systems" be followed.
(b)
Positive identification of piping system content must be identified by lettered
legend giving the name of the content in full or abbreviated form, or a
commonly used identification system. Such identification must be made and
maintained at suitable intervals and at valves, fittings, and on both sides of
walls or floors. Arrows may be used to indicate the direction of flow. Where it
is desirable or necessary to give supplementary information such as hazard of
use of the piping system content, this may be done by additional legend or by
color applied to the entire piping system or as colored bands. Legends may be
placed on colored bands.
Examples of legends which may give both positive identification and supplementary information regarding hazards or use are:
| Ammonia ..................... | Hazardous liquid or gas |
| Chlorine ...................... | Hazardous liquid or gas |
| Liquid caustic ................. | Hazardous liquid |
| Sulphuric acid ................. | Hazardous liquid |
| Natural gas ................... | Flammable/explosive gas |
Note: Manual L-1, published by Chemical Manufacturers Association, Inc., is a valuable guide in respect to supplementary legend.
(c) When color,
applied to the entire piping system or as colored bands, is used to give
supplementary information it should conform to the following:
| CLASSIFICATION | PREDOMINANT COLOR |
| F-Fire-protection equipment ............. | . Red |
| D-Dangerous materials ................. | . Yellow (or orange) |
| S-Safe materials ....................... | . Green (or the achromatic colors, white, black, gray, or aluminum) |
| And, when required, P-Protective materials ............................ | . Bright blue |
(d)
Legend boards showing the color and identification scheme in use must be
prominently displayed at each plant. They must be located so that employees who
may be exposed to hazardous material piping systems will have a frequent
reminder of the identification program.
(e) All employees who work in the area of
hazardous material piping systems must be given training in the color and
identification scheme in use.
Notes
Statutory Authority: Chapter 49.17 RCW. 88-14-108 (Order 88-11), § 296-59-080, filed 7/6/88.
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