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 40 OF 53
MEC/S/05/62/01 REVISION A
11.6 In connecting pipes, special items, fittings and equipment where different wall
thickness are to be welded, CONTRACTOR shall follow the procedures
indicated in ANSI B31.8/ANSI B31.4, as applicable. The required tapering shall
be done by CONTRACTOR at no extra cost to COMPANY.
11.7 For tie-in of adacent sections of pipeline already pressure tested, the pup used
for tie-in shall be of single length or off-cuts of pipe which have already been
hydrostatically tested. CONTRACTOR shall take care that sufficient number of
pretested pipes with different wall thicknesses are readily available.
12.0 SPECIAL INSTALLATIONS ON THE PIPELINE.
12.1 General
12.1.1 In addition to constructing the pipeline, CONTRACTOR shall also install certain
other auxiliary facilities and appurtenances.
CONTRACTOR shall do all work necessary at each of the installations to
provide facilities which are complete in all respects and ready for operation.
Without limiting the generality thereof, the work required to complete the
installations shall, where applicable, include all site surveys, site preparation,
filling, grading, fencing, foundations, installation of block valves, side valves,
pipework, pipe supports, pressure gauges, mechanical facilities, civil work,
painting, installation of all electrical equipments, motors, cables, conduIt, wiring
and fixtures and hooking up of same; installation of all instruments, piping,
valves and fittings; mount all instruments and make all piping and electronic
connections, etc.
On completion, all elements of each installation shall be checked our and tested
for full and correct operation in the presence of and to the satisfaction of
COMPANY. All work shall be carried our strictly in accordance with the
appropriate codes, the approved drawings, and this and other related
specifications.
CONTRACTOR shall fabricate all piping and install valves and fittings as
required by the detailed engineering drawings prepared by him and approved by
COMPANY.