Volume-II of IV - GAIL

1.0 SCOPE
1.1 General
This specification covers the minimum requirement for application of anticorrosion
field joints coating on welded pipe section and field tie-in joints
referred to here in after as Joint(s). The contractor shall perform all work in
accordance with this specification, latest pipeline coating practices and to
the full satisfaction of the Owner. The anti-corrosion pipe joint coating shall
be compatible with yard applied, Ultra Violet (UV) radiation protected, 3
layer side extruded polyethylene coating conforming to DIN-30670. The
sleeve width shall be suitable for cut back of 120 ± 20 mm to be left at
both the ends of coated pipes. The job includes supply of all materials
equipment, consumables, labour, supervision, quality control, inspection
repairs.
1.2 Manpower, Material & Equipment
1.2.1 The Contractor shall supply wrap around heat shrinkable sleeves which is
composed of two parts such as adhesive coated wrap around and a
curable modified epoxy primer alongwith applicator pads.
1.2.2 The supply of wrap around heat shrinkable sleeve shall be under
Contractor’s scope.
1.2.3 The Contractor shall provide all skilled/ unskilled personnel required for
execution of this work.
1.2.4 The joint coating operation starting from cleaning and surface preparation
till application of joint coating and wrapping of the pipe joints shall be
performed under the supervision of skilled personnel who are well versed
in the work.
1.2.5 Contractor shall at his own cost provide a fully equipped laboratory and
test facilities with adequate inventory to carry out tests required for
procedure qualification and during regular production, for testing of joint
coating system.
2.0 REFERENCE DOCUMENTS
2.1 Provision of the following documents/ codes shall generally be followed for
standard of specification and workmanship.
a) DIN – 30672 : Corrosion protection tapes and Heat Shrinkable
Sleeves.
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