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Glas Mesh FRP
Fiberglass Reinforced Plastic (FRP)
by Glas Mesh Company

Standardized corrosion control and anti-wear products
for metal and plastic piping

FRP roll-on shields |
FRP
insulation spacers |
FRP casing
insulators
FRP pipe saddles |
FRP Flatties |
Epi-Seal®
Seam Sealer
Background
Having been a fiberglass reinforced plastic (FRP)
manufacturer and fabricator since 1965, Glas Mesh Company set as objectives (1) the
development and marketing of several new and standardized FRP products for use by industry
corrosion control engineers and technicians, and (2) insulating products suitable for the
prevention of electrical contact shorts on buried and exposed pipelines or mains. Until
recently, companies simply used whatever they happened to have on the job site. After a
comprehensive development program, Glas Mesh Company designed and began fabricating a line
of corrosion and abrasion control products specifically shaped for piping and particularly
useful to the gas, oil and chemical industries. These new FRP products are standardized,
work effectively and are economical to use. They are also immediately available from
stock.
The first of Glas Mesh Company's line of FRP products was
the highly successful Roll-On Shield, which stops corrosive and electrolytic wear of
ferrous metal suspended or overhead pipe mains effectively and economically. FRP Roll-On
Shields also eliminate or materially reduce hot or cold energy loss on thermally insulated
pipe mains and serve to control abrasion and wear on plastic piping systems. Roll-On
Shields are pre-shaped 240o peripherally.
Today Glas Mesh Company provides a complete line of FRP
corrosion and abrasion control products: FRP Insulation Spacers, FRP Roll-On Shields, FRP
Pipe Saddles, FRP Casing Insulators, and FRP Flatties. All are pre-formed and fabricated
for specific functional uses.
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Why FRP?
When considering the advantages of modern plastics (light
weight , ease of handling and installation, high dielectric strength, no corrosion
problems), and their disadvantages (cold flow, cold temperature embrittlement, heat
distortion, low abrasion resistance, relatively low compressive strength), it becomes
obvious that fiberglass reinforced plastic (FRP) provides all the physical advantages and
properties while eliminating or materially reducing the disadvantages of the
non-reinforced plastics.
FRP's properties of light weight, ease of handling and
installing, high dielectric strength, corrosion resistance with great compressive strength
combine to make it the state-of-the-art material for Glas Mesh FRP abrasion control and
electrical insulation products. Glas Mesh FRP products will not cold flow under pressure
nor become brittle in cold temperatures, will not soften nor distort from heat, and they
have excellent abrasion resistant properties.
Glas Mesh products are fabricated from a precision
manufactured, filament wound, ultraviolet protected, FRP epoxy with integral epoxy liner
and exterior coating. FRP products' inside diameters approximated the outside diameters of
the carrier pipes, thus assuring close fit and requiring minimum clearance during
installation. Glas Mesh products meet all known industry recommended standard
specifications and properties.
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A non-conductive, pre-shaped 240o peripheral
snap-on pipe saddle. Applications: Used by utilities for electrical isolation and abrasion
control of mains and by industry for load distribution, energy conservation, and
insulation protection at hangers and supports of overhead and pylon-supported pipe mains.
Also employed for abrasion control on plastic pipe systems and wrapped cables. FRP Roll-On
Shields will never corrode or deteriorate, physically or chemically, and are easily
installed. Snaps on carrier pipe and slides into place without tools, banding or welding.
Special lengths can be made available for pipe diameters larger than 16".
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Shield
Nos. |
Pipe Dia.
(nominal) |
Shield
Length |
| 2 |
2" |
6" |
| 3 |
3" |
6" |
| 4 |
4" |
6" |
| 6 |
6" |
9" |
| 8 |
8" |
12" |
| 10 |
10" |
12" |
| 12 |
12" |
12" |
| 16 |
16" |
12" |
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An extremely strong, non-conductive fiberglass reinforced
plastic insulation spacer. Applications: Used by utilities to prevent and or correct
electrical shorts caused when buried steel mains contact each other or are in close
proximity. Peripheral circumference of 120o. Minimizes shielding effect on
cathodic protection systems.
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Spacer
Nos. |
Pipe Dia.
(nominal) |
Wall
Thickness |
Spacer
Length |
| 2 |
2" |
.08" |
12" |
| 3 |
3" |
.09" |
12" |
| 4 |
4" |
.09" |
12" |
| 6 |
6" |
.12" |
12" |
| 8 |
8" |
.15" |
12" |
| 10 |
10" |
.17" |
12" |
| 12 |
12" |
.19" |
12" |
| 16 |
16" |
.25" |
12" |
| 18 |
18" |
.25" |
12" |
| 20 |
20" |
.25" |
12" |
| 24 |
24" |
.25" |
12" |
| 30 |
30" |
.25" |
12" |
| 36 |
36" |
.25" |
12" |
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Application: Provides an extremely tough, inexpensive
casing insulator that electrically isolates a gas carrier main from a steel casing, and
provides excellent abrasion control. The two pieces snap together surrounding the carrier
pipe and separating it from the casing. No tools, banding or welding are required. Ideal
for retrofits where original or existing spacer or insulator has been damaged,
deteriorated or failed. Special lengths can be made available.
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Insulator
Sizes |
Pipe Dia.
(nominal) |
Insulator
Length |
| 2 |
2" |
6" |
| 3 |
3" |
6" |
| 4 |
4" |
6" |
| 6 |
6" |
6" |
| 8 |
8" |
6" |
| 10 |
10" |
6" |
| 12 |
12" |
6" |
| 16 |
16" |
6" |
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Non-corrosive, non-conductive 180o pipe saddles
fabricated from high quality FRP. Applications: Substitute for, or use in place of, metal
saddles where electrical insulation is desirable, and is ideal for pipes exposed to
corrosive environments. Protects pipe insulation and plastic pipe systems from abrasive
wear at overhead hangers and supports. May be banded, cemented or taped in place. Special
lengths can be made available.
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Saddle
Nos |
Pipe Dia.
(nominal) |
Saddle
Length |
| 1 |
1" |
6" |
| 1 1/2 |
1 1/2" |
6" |
| 2 |
2" |
6" |
| 3 |
3" |
6" |
| 4 |
4" |
6" |
| 6 |
6" |
9" |
| 8 |
8" |
12" |
| 10 |
10" |
12" |
| 12 |
12" |
12" |
| 14 |
14" |
12" |
| 16 |
16" |
16" |
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FRP Flatties:
Type Nos. 12" x 12" x 1/16", 1/8", 1/4",
1/2"
FRP Flatties are made of a select combination of random
glass mat reinforcements saturated with polyester resins combined with suitable fillers.
These composites are cured and compressed under moderate pressure to form smooth, dense
laminates. Flatties have numerous applications in the natural gas distribution and
transmission and liquid pipeline industries. They are available in 12" x 12"
squares or economical larger sized sheets. We will be glad to quote prices on specific
thicknesses or non-standard sizes, thicknesses or widths.
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Whenever it is deemed desirable to bond or
seal the space between the inside surface of our FRP Shields or Spacers
and the corresponding pipe surface, we suggest that you use Epi-Seal®
Epoxy Seam Sealer for this purpose. Epi-Seal® Seam Sealer is a filled,
two-part epoxy that is used for the repair and maintenance of steel
tanks and structures.
Recommended Application
Procedure:
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1. Wire brush or grit
blast the inside surface of the FRP Spacer and
corresponding pipe surface. |
2. A FRP Type #60
Spacer is used when the pipe rests on a flat surface. |
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3. Check that the
surfaces are clean and dry, then mix and apply the Seam
Sealer to the prepared FRP Spacer and corresponding pipe
surface. For easier mixing in cool weather, warm Seam
Sealer to approximately 100°F (38°C). Avoid applying
Seam Sealer at temperatures below 50°F (10°C). |
4. Secure the FRP
Spacer in place and trowel off any excess epoxy from
around the edges. Depending on temperature, the epoxy
will cure in three to five hours. |
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Size |
Type #60 |
Type #120 |
8
10
12
16
18
20
24
30
36 |
1/4 lb
1/4 lb
1/2 lb
1/2 lb
3/4 lb
3/4 lb
1 lb
1-1/4 lb
1-1/4 lb |
1/2 lb
1/2 lb
1 lb
1 lb
1-1/2 lb
1-1/2 lb
2 lb
2-1/2 lb
2-1/2 lb |
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5. The weight of the
pipe is usually sufficient to keep the FRP Spacer in
place until the epoxy cures. |
Approximate Usage in Pounds |

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