Volume-II - GAIL

(vi) Heat Ageing (*) - Melt flow rate
shall not
deviate by
more than
35% of
original value
(vii) Light Ageing (*) - Melt flow rate
shall not
deviate by
more than
35% of
original value
(viii) Cathodic Disbondment
@+65°C after 30 days
@+65°C after 48 hrs
(ix) Degree of Cure of Epoxy
Percentage Cure, ∆H
∆Tg
mm radius of
disbondment
(**)
%
°C
15 max.
7 max.
95
+3/ -2
DIN 30670
DIN 30670
ASTM G42
CSA Z245.20-
98(*)
(*) Test carried out in an independent laboratory of national/ international
recognition on PE top coat is also acceptable.
(**) Disbondment shall be equivalent circle radius of total unsealed area as per
ASTM G 42.
(***) Temperature to which the test specimens are to be heated during cyclic
heating shall however be as per the recommendations of epoxy powder
manufacturer.
6.0 MEASUREMENT AND LOGGING
CONTRACTOR shall maintain records in computer using MS ACCESS database
Software containing all the relevant data of individual pipe and pipe coating including
heat number, diameter, length, wall thickness, defects, pipe number, batches of
materials, materials balance, sampling, testing, damages, repairs, rejects and any
other information that COMPANY considers to be relevant and required for all
incoming bare pipes and COMPANY approved outgoing coated pipes as applicable.
CONTRACTOR shall submit this information in the form of a report at the agreed
intervals. The above data shall also be provided in MS EXCEL/MS ACCESS formant in
Compact Disc (CD). CONTRACTOR shall provide a Computer Terminal to COMPANY
Representative for monitoring/tracking of the above. The CONTRACTOR shall also
submit the material balance details to COMPANY for information at the end of shift.
7.0 COATING PROCEDURE AND QUALIFICATION
7.1 Upon the award of the CONTRACT, the CONTRACTOR shall submit within two(2)
weeks for COMPANY approval, a detailed report in the form of bound manual
outlining, but not limited to the following:
GAIL (INDIA) LIMITED
3 – LAYER POLYETHYLENE
COATING OF LINEPIPES
GAIL-TS-COATING-3LPE
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