Volume-II of IV - GAIL

MECON LIMITED
REGD. OFF : RANCHI (BIHAR)
Document6
PROCESS & PIPING
DESIGN SECTION
NEW DELHI
TITLE MAINLINE CONSTRUCTION
(ONSHORE)
STANDARD SPECIFICATION
SPECIFICATION NO. PAGE 11 OF 53
MEC/S/05/62/01 REVISION A
4.4.4 CONTRACTOR shall grade sharp points or low points, without prejudice to
section 6.0 of this specification, to allow the pipe to be bent and laid within the
limits set forth in these specifications and drawings as regards the minimum
elastic curvature permitted, and shall drill, blast or excavate any rock or other
material which cannot be graded off with ordinary grading equipment in order to
make an adequate working space along the pipeline.
4.4.5 No temporary or permanent deposit of any kind of material resulting from
clearing and grading shall be permitted in the approach to roads, railways,
streams, ditches, drainage ditches and any other position which may hinder the
passage and/or the natural water drainage.
4.4.6 The Right-of-Way clearing and grading operations shall in no case involve
embankment structures of any type and class without prior approval of the
authorities having jurisdiction over the same.
4.4.7 In the case of natural or artificial deposits of loose soil, sand, heaps of earth, or
other fill materials, these shall be removed till stable natural ground level is
reached so as to ensure the construction of the pipeline ditch is in stable ground.
4.4.8 In the case of Right-of-Way clearing and grading on hillside or in steep slope
areas, proper barriers or other structures shall be provided to prevent the
removed materials from rolling downhill. The Right-of-Way crossfall shall not
exceed 10%.
4.4.9 Wherever the pipeline Right-of-Way runs across plantations, alongside
farmyards, built up areas, groups of trees, horticultural spreads, gardens, grassfields,
ditches, roads, paths, railways or any other area with restrictions of some
kind, CONTRACTOR shall grade only the minimum area required for digging
and constructing the pipeline. In the said places, CONTRACTOR shall carry out
the works in such a way that damage done from the pipeline construction is
kept to a minimum.
4.5 Provision of Detours
CONTRACTOR shall do all necessary grading and bridging at road, water and
other crossings and at other locations where needed, to permit the passage of
its men and equipment. It is understood that the CONTRACTOR has recognised
such restricctive features of the Right-of-Way and shall provide the necessary
detoors and execute the works without any extra cost to COMPANY. Public
travel shall not be inconvenienced nor shall be wholly obstructed at any point.