Pipelaying Tender-VOL IV - WorleyParsons.com

EPMC SERVICES FOR REWARI – KANPUR PIPELINE
SPECIFICATION FOR PIPELINE CONSTRUCTION
4.6.6 The intent of the foregoing Clauses is to produce bends which shall minimize the distortion of
the pipe and which shall in no way impair the strength of the pipe. If OWNER so directs, and prior to
the bending of any pipe to be used on the work, test specimens of any or all sizes of pipe to be used
on the work shall be bent to determine the optimum bending and distortional limitations that will be
used on the work. For such tests the CONTRACTOR shall furnish the labour and equipment
necessary, and OWNER shall furnish the pipe.
4.6.7 The pipe shall be handled during laying, in such a manner as to prevent the ends and the wall
from being damaged.
4.6.8 Skids shall be used to raise the pipe sufficiently to accommodate welding and the wrapping of
joints.
4.6.9 Pipe shall be laid in such a manner as to allow slack in the line when lowered into the ditch.
4.6.10 Miter and Unsatisfactory bends: No miter bends shall be permitted in the construction of the
pipeline. Contractor shall cut out and remove any bend or bends, which do not meet the specifications
and shall replace the same with the bends complying with specification at no additional cost to the
owner. In the event the contract provides for supply of the line pipes required for replacement will be
furnished by owner, but cost of replacement of such pipes shall be done by contractor. Cutting of
factory made bends and cold field bends for any purpose are not permitted.
4.7 Welding
This shall include the welding of pipe joints, fittings, etc.
4.7.1 All welding shall be done by the manual, electric shield-arc process unless written approval of an
alternate method has been obtained from the OWNER prior to commencement of the work. The
CONTRACTOR shall furnish all labour, equipment, tools and supplies including welding rods, oxygen,
acetylene, and all other necessary materials.
4.7.2 All welding done under this specification shall be in accordance with latest edition of ASME
Standard B31.4 "Pipeline Transportation Systems for Liquid Hydrocarbons, and other Liquid" and
General Specification MH2145-C000-PL-SPC-0020, Pipeline Welding.
4.7.3 OWNER reserves the right to have any and all welds checked by such non-destructive tests as
X-ray, gamma ray, Magnaflux, ultrasonic, or any combination of these, or other inspection methods;
and if the results of these inspections as determined by OWNER indicate that any weld is
unsatisfactory, CONTRACTOR shall have the weld repaired or replaced at his own expense as
directed by the OWNER.
4.7.4 After the welding operation, the pipe shall be left uncoated for a period not greater than twentyfour
(24) hours to permit OWNER to conduct the non-destructive tests on the welds. The
CONTRACTOR shall co-operate fully with the crew carrying out the tests. Whenever practical,
OWNER will also conduct non-destructive tests on all tie-in welds. The CONTRACTOR will allow a
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