Pipelaying Tender-VOL IV - WorleyParsons.com

REWARI KANPUR PIPELINE
PROJECT
3 LAYER POLYETHYLENE COATING OF
LINEPIPES
DOCUMENT NUMBER
0068-00-SPC-2004
Revision 0
6. Both 30 days and 48 hour tests shall be carried out for a particular material combination
and pipe diameter. In case results for 30 days test are satisfactory, subsequent coating
application procedure qualification for different pipe size with same coating material
combination, 48 hours test shall be acceptable
Table 5.3.2 : Testing Requirement During Production Coating
Sl. No Test Testing Frequency
Test Method
and
Acceptance
Criteria
Remarks
a Degree of Cure One Pipe/Shift Section 5.3.1 Note 1, 2
b Adhesion Tests One Pipe/ Shift Section 5.3.2 Note 1, 2
One out of 25
c Bond Strength
Pipes Section 5.3.5 Note 1, 2
d Impact Strength One Pipe/Shift Section 5.3.6 Note 1, 2
e
f
Indentation
Hardness
Air Entrapment
Test
One Pipe/Shift Section 5.3.7 Note 1, 2
One out of 25
Pipes Section 5.3.10 Note 1, 2
Thickness Measurements
g
Epoxy Layer
Adhesive Layer
Once in the beginning of
Shift or whenever plant
restart after stoppage
Section 5.3.11 Note 1, 4
Total Coating
Thickness
All Pipes
h
Holiday
Inspection
All Pipes Section 5.3.12 Note 1, 4
i
Cathodic
Disbondment Test
48 hour test at (+)
65° C
Once per week or each
batch of epoxy used
whichever is early
Section 5.3.9 Note 1, 3
Notes:
1 Working shift shall be maximum 12 hours.
2 In case the test fails to comply the specified requirement, preceding and succeeding
coated pipes shall be tested. If both pipes pass the test, then the remainder of the
coated pipes in the lot shall be accepted. If tests on any one of the two pipes fail to
meet the specified requirements then either all pipes shall be individually tested or
0068-FMT-01 Page 21 of 31
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