2.1.2
Fiberglass Pipe Screen
Fiberglass pipe screen and fittings shall be manufactured from
thermosetting epoxy resins and glass fiber by either a centrifugal casting
process or by a filament winding process. Glass fiber used shall be
continuous filament, electrical glass with a finish compatible with epoxy
resins. Each glass fiber or filament shall be thoroughly impregnated with
epoxy resin. The resins used shall be diglycidyl ether of bisphenoa A or
cycloaliphatic diepoxides, or blends of the two. Curing agents for these
resins shall be aromatic diamines, polycarboxylic acid anhydrides and
eutectics therefrom. Curing of the resin system shall be at a temperature
over 150 degrees C 300 degrees F for a minimum of one hour. Fiberglass
pipe wall thickness, strength and durability requirements shall be
equivalent to [_____][the Fiberglass/Epoxy pipe produced by Fiberglass
Resources Corporation of Farmingdale, New York or Burgess Well Company,
Inc., Minden, Nebraska, telephone (308) 832-1642]. All fiberglass pipe and
fittings shall be round and straight, of uniform quality and workmanship,
and free from all defects including indentation, delamination, bends,
cracks, blisters, porosity, dry spots, resin segregation and resin-starved
areas. The inside of the pipe and fittings shall be smooth and uniform.
The impregnation of the glass fiber with resin shall be such that when the
pipe is cut or slotted, no fraying or looseness of glass fiber occurs.
[The well screen, pipe, and fittings shall have a minimum collapse strength
of [_____].] [The screen, pipe, and fittings shall have a clear inside
diameter of [_____].]
2.1.2.1
Couplings
Couplings for fiberglass pipe sections shall be socket threaded or
mechanical key-type couplings. The couplings shall be manufactured of the
same materials used for the fiberglass pipe specified herein and may be
either cast integrally with the pipe sections or as separate components for
attachment to the pipe in the manufacturers plant. Every coupling attached
to the pipe section as a separate component shall be proof tested in the
manufacturer's plant with a tensile load of 9 kN 2000 lbs. Key-type
couplings shall consist of male and female halves designed for joining and
locking together by means of a key strip inserted in grooves in the
coupling halves. The minimum wall thickness remaining at any grooved
section shall not be less than the minimum thickness specified for pipe.
Key strips and locking strips shall be of fiberglass, plastic or other
non-corrosive material capable of withstanding shearing and bearing
stresses equivalent to the design load for the coupling. Socket type
fitting connections of the pipe sections shall be bonded with epoxy
adhesive. The epoxy materials and bonding agents shall be as recommended
by the pipe manufacturer. The determination of the proportions and
preparation of adhesives, the method of application, and the procedures
used for the making and curing of the joints shall be the responsibility of
the Contractor. The pot life, initial setting time and external heating
requirements for curing of the adhesive shall be suitable for the procedure
and climatic and other conditions and shall be varied as required to suit
changes in climatic and other conditions. The system for making joints at
the relief well site shall provide a curing period adequate to develop the
ultimate strength of the adhesive. Self-tapping screws or other devices
for holding adhesive-joined pipe in the couplings during the curing period
may be utilized. In no case shall a newly-made joint in the casing pipe be
lowered into the relief well, or be submerged in water prior to complete
curing of the adhesive.
SECTION 02525A
Page 12
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