GDS-15-PH 0519
11
CLEANING PREPARATION
Again, the unit to be cleaned must be absolutely isolated from other parts of any
other system. Contact your Local Goodway local Rep. For specific details on dosage
& recirculation times for your application. For systems that cannot be isolated by the
closing of valves, isolation may be accomplished via other suggested methods – all
which require plant clearance/ authorization: i.e. using rubber blankets, bulkheads
with seals inflatable nylon or rubber bags, rubber sponge-covered plugs, or
blind flanges and steel plates with rubber seals. Long lines may require auxiliary
connections for chemical cleaning. The following information should be considered
before a chemical descaling cleaning process:
It is recommended that ScaleBreak
®
products be recirculated rather than applied
via a soak method (some plants may prefer this). In either case, temporary piping
or hose lines will be required to connect the cleaning solution mixing tanks or
possible trucks to the unit, with return lines to tanks or drains. Proper precautions
and adequate provisions must be made to protect equipment, isolate control lines,
replace liquid level sight glasses with expendable materials if any, and provide
suitable points for checking temperatures if heat is to be applied. It may be
necessary to remove selected system components if the cleaning process
might damage them.
The entire cleaning procedure/process must be developed in detail and agreed
on with plant personnel before starting ScaleBreak
®
descaling operations. Factors
to be considered include: The methods for controlling temperatures; the means
of mixing, heating (if needed), and circulating any ScaleBreak
®
solution; proper
venting of dangerous gases from equipment to a safe area; and means for draining,
filling, and flushing under inert atmospheres. Sampling points, test procedures, and
control limits should also be established.
TO RECAP SPECIFICALLY:
1.
Process Safety Information review with plant personnel and others to be
involved with all parts of descaling operations.
2.
Process Hazard Analysis of descaling procedures and contingencies with plant
management for emergency procedures.
3.
Complete lay-out of developed General Operating Procedures
during descaling.
4.
Training of any personnel involved in the descaling operation itself (Right to
know [RTK] /SDS and understanding of the ScaleBreak
®
product being applied
and neutralizing materials).
5.
Personal Protective Equipment overview needed for the operation.
6.
Mechanical Integrity checks of all systems that will be descaled.
7.
Pre-startup Safety Review with plant & operations/management for the job.
8.
Emergency Planning and Response for descaling operations.
