(2) Cast iron and steel traps often have their valve seat loosened
b y the erosive effect of flashing condensate. This results in large leaks.
( 3 ) Continuous operation and excessive use cause links, levers,
p i n s , p i v o t s , and elements to change shape and malfunction due to wear.
( 4 ) If trap failure persists and a comprehensive inspection
i n d i c a t e s that failure is not due to residue buildup or wear, the inspector
may determine the problem to be system troubles rather than trap malfunction.
2 . 6 Troubleshooting.
2 . 6 . 1 I d e n t i f i c a t i o n . D u r i n g periodic inspections, inspectors have many
t r a p s to inspect. F a s t i d e n t i f i c a t i o n o f a f a u l t y o r f a i l e d t r a p i s
I f the nature of the problem can be identified, so much the
b e t t e r . E c o n o m i c a l , cost-effective inspection, t h o u g h , depends on identifying
p r o b l e m traps with the least expenditure of labor. Correction of the problems
can be scheduled in a consolidated, planned, efficient manner by the shops.
2 . 6 . 2 D i a g n o s t i c s . T r o u b l e s h o o t i n g begins with the knowledge of trap
o p e r a t i o n s and combines the methods of inspection with a familiarity with trap
m i s a p p l i c a t i o n s and potential failures that are discussed in this chapter.
T a b l e 3-2 outlines the basic indicators of normal operations and problems for
t h e various types of traps.
2 . 7 Inspection Reports and
2 . 7 . 1 Inspection Log. A n example inspection log is shown in figure 3-10.
T h i s log is intended to report results of periodic inspections and is a
temporary record. The log does not repeat data contained in the steam trap
i n v e n t o r y record.
2.7.2 Permanent Records. Permanent inspection and repair records are an
important element in the inspection and maintenance program. The record
p r o v i d e s information needed to identify chronic problem areas, develop life
c y c l e s costs, and generally aid in upgrading the steam system. I n s p e c t i o n
r e p o r t data should be transferred from the inspection log to the permanent
The following data should be included in the permanent record:
Trap identification and location
Date initially installed
Scheduled inspection frequency
D a t e of last inspection
D a t e and description of last repair
2 . 7 . 3 Manual Records. I f automation of the permanent trap records is not
f e a s i b l e , an alternative system that can be used is an index card system.