OGSI MOGS - 100, Инструкция по установке, эксплуатации и обслуживанию

Страница: 62 / 67

Effective 11/2010 II
Oxygen Cleaning Procedure
Scope
This procedure sets forth the cleaning requirements for parts that are used in the
construction of
OGSI
oxygen systems and are in the gaseous oxygen product stream including
but not limited to valves, tubing, fittings, manifolds and pipes.
Objective
The objective of this procedure is to provide personnel with clear directions and an
understanding of how parts are to be cleaned and why that is important. This document is based
on guidelines provided in publication CGA G-4.1-2009 which is produced by the Compressed
Gas Association (CGA) and is intended to ensure that our internal procedure is compliant with
that publication.
Safety
Harmful contamination such as grease, dirt, oil, dust, solvents, weld slag, sand, rust and
previously applied thread sealants on parts that come into contact with oxygen can cause a
combustion reaction resulting in system degradation or failure or worse, a hazard to nearby
personnel. Care needs to be taken in the cleaning and handling of components used in oxygen
service to prevent any contamination related failure.
While the
CGA G-4.1-2009
standard makes allowance for cleaning parts using caustic
agents, acids or solvents, the OGSI procedure will use only mechanical (soaking, wire brushing
or grinding) means for pre-cleaning and hot water cleaning with aqueous detergents for final
cleaning. This is done to reduce any chemical exposure risk to personnel and to eliminate the
additional steps needed to remove these cleaning agents from the parts themselves.
Training
Personnel involved in the cleaning and preparation of parts used in oxygen service should
be trained in these cleaning procedures and be familiar with this document.
Process Flow Chart
The flow chart below describes oxygen cleaning and parts handling process.
Parts Received and Initial Inspection
Upon determining which parts need to be cleaned, the technician needs to perform an
initial visual inspection (under white light). Check for the presence of visible residue on the parts
including but not limited to oil, grease, dirt, dust, rust, weld slag or pre-existing thread sealant