Pipelaying Tender-VOL IV - WorleyParsons.com

REWARI KANPUR PIPELINE
PROJECT
HIGH FREQUENCY ELECTRIC WELDED
(HFW) LINE PIPE
DOCUMENT NUMBER
0068-00-SPC-2002
Revision 0
TYPE OF INSPECTION
Wall thickness measurement
FREQUENCY OF INSPECTION
The wall thickness of each pipe shall be checked along the
circumference at both ends and at the mid location of pipe
body at 12 o'clock, 3 o'clock, 6 o'clock and 9 o'clock
positions
Wall thickness shall be measured and recorded at least 3
times per operating shift (12 hours maximum).
10.2.3 SAMPLES AND TEST PIECES FOR MECHANICAL TESTS
10.2.3.2 TEST PIECES FOR THE TENSILE TEST
Longitudinal tensile tests shall be carried out on a strip specimen. The strip specimen
shall be tested without flattening.
The transverse tensile tests shall be carried out on flattened rectangular specimen.
For weld tensile test: Inside and outside flash of weld in excess of pipe wall thickness
shall be removed from the specimen either by grinding or machining. Specimen shall be
tested for ultimate tensile strength only.
10.2.3.3 TEST PIECES FOR THE CVN IMPACT TEST
In addition to the specimen taken from the body of the pipe, three transverse
specimens with weld in middle and three transverse specimens with Heat Affected
Zone (HAZ) in the middle shall also be taken. When either full size or sub-size
transverse specimen as per API Spec 5L, Table 14 is not possible to obtain,
transverse specimen of either
may be obtained.
When such sub-size specimens are used, the acceptance of the
individual/average absorbed energy values shall be established as per API Spec
5L Para 9.8.1 and as modified in this specification.
10.2.3.4 TEST PIECES FOR DWT TEST
Two transverse specimens shall be taken from one length of pipe per heat per lot
of 100 pipes per combination of pipe size and specified wall thickness. Unless
specified otherwise, the test shall be conducted at +32F (0C).
10.2.4 TEST METHODS
10.2.4.3 CVN IMPACT TEST
The charpy test shall be carried out in accordance with ASTM A 370.
0068-FMT-01 Page 16 of 38
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