McElroy In Field, Operator'S Manual

Page: 21 / 28

Inspect Coupon/Interpret Result
A) The coupon breaks in the joint which is a failing result.
B)
The coupon stretches in the pipe which is a passing result.
C) The coupon breaks in the pipe which is a passing result.
If the joint of the coupon does not pass, examine that you are doing
everything properly and isolate the cause of the failing result.
Areas to Examine
• Testing Procedure
— Was coupon to specifications?
— Were there scratches?
— Was surface smooth?
— Were widths correct?
— Were the pipe and joint temperatures the same?
— Was test performed at too cool a temperature?
• Fusion Procedure
— Is the fusion procedure you are using a qualified procedure?
— Are you following the procedure properly?
— Use a DataLogger™ with the fusion machine to verify the
procedure is correct.
• Adverse Conditions
— Was the fusion joint made in an extreme ambient
temperature situation?
— Was the fusion joint made in inclement weather (rain/snow
etc)?
— Was the fusion joint made during excessive wind?
• Joint Contamination
— Did the ends of the pipe have contamination before the
fusion took place?
• Operator Qualification
— Is the operator qualified to perform the procedure and
visually inspect the resultant fusion?
• Fusion Equipment
— Is the equipment in good repair?
— Is the equipment clean?
— Does the equipment perform to specifications?
• Proper Cool Time
— Was the proper cooling time for the joint used?
• Handling
— Was the pipe with the fusion joint subjected to any rough
handling?
• Material
— Is the material in accordance with the pipe manufacturers
specifications?
TX04081-3-2-11
PH
0417
5-5-
20
-10
PH
0417
6-5-
20
-10
PH
0417
4-5-
20
-10
A
B
C
Operation
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