Description
Tough, heavy duty 14 gauge (0.74"[1.88mm]) 304 stainless steel isolators/spacers
are available for use in highly corrosive environments. They offer maximum corrosion
resistance while providing support for large diameter pipe, unusually heavy pipe or
for long casing pulls.
The flanges of the spacer are deep embossed and the corners are chamfered.
The runners are attached with 3/8" (9.5mm) diameter studs, which are fusion welded to the band.
The studs are recessed far below the wearing surface of the runner and, after the runner is
anchored to the band, the stud counter-bore is filled to insure a water tight seal for
the stud and the lock fastener.
Targeted Use - Water
- For carrier pipe diameters ranging from 4" (101.6mm) to 120" (304.8cm).
- For carrier pipe insertion lengths up to 5,000 feet* (1,524M)
- Spacing Recommendations: Max 8' (243.8cm) between spacers, Max 2' (61.0cm) from casing pipe end, Max 2' (61.0cm) on each
side of bell or mechanical joint.
- Recommended End Seals: Model C, S, W, R and FW.
*Pipe insertion lengths may vary depending on type of casing pipe, condition of casing pipe or other factors that may cause
excessive abrasion to runner materials.
Typical Application for Stainless Steel Casing Spacers
Benefits/Features of Stainless Steel Casing Spacers
- Low Labor Costs - May Be Installed
By One Person
- Glass Reinforced Nylon or Polyester Runners Offer Low Coefficient of Friction = 0.1 to 0.6
- Glass Reinforced Nylon or Polyester Runners Offer 18,000 PSI (1,265kg/cm²) Compressive Strength
- Riser Height May Be Specified For Specific Positioning of Carrier Pipe Within Casing
- Heavy Duty PVC Inner Liner Provides Protection For Pipe and/or Coating
- Offers excellent corrosion resistance
- May be used for long pulls and/or heavy pipe installations
- Designed to last for the life of the piping system
- PVC Liner Provides Back-up Isolation
- Deeply Embossed Flanges Offer Added Strength During Tightening of Flange Bolts
- Eliminates the Need for Blown Sand or Pea Gravel
- Available with 8" or 12" bands.
- 10 or 7 gauge risers may be ordered.
Casing Spacer Field Terminology
Material Specifications for Stainless Steel Casing Spacers
Band
14 Gauge (0.074"[1.88mm]) 304 stainless steel.
(S8 and S12) |
12 Gauge (0.105" [2.66mm]) 304 stainless steel.
(S12 = 40"#216; and up)
Engineer/Contractor must specify. |
16 Gauge (0.061" [1.56mm]) 304 stainless steel.
(Model SL8) |
Flanges of the spacer are deep embossed and the corners are chamfered.
Configurations - Band
4" (101.6mm) through 36" (914mm) = 2-piece |
36" (914mm) through 48" (1,219mm) = 3-piece |
48" (1,219mm) and over = Consult Factory |
Finish - None
Liner - Polyvinyl Chloride Liner (Standard)
Thickness | 0.090" (2.29mm) minimum |
Hardness | Durometer "A" 85-90 |
Dielectric Strength
1/8" (3.18mm) Surge Test
Step-by-Step Test |
60,000 V min.
58,000 V min. |
Water Absorption | 1% max. |
Temperature | -40 to 170ºF. (-40 to 76ºC.) |
Liner - T.P.E. Liner (Temperature Extremes)
Model C12 Only
Thickness | 0.118" (3.0mm) |
Hardness | Shore "A" 73 |
Dielectric Strength
1/8" (3.18mm) Surge Test
Step-by-Step Test |
60,000 V min.
58,000 V min. |
Water Absorption | 1% max. |
Temperature | -50 to 270ºF. (-45 to 132ºC.) |
Risers
10 Gauge (0.135" [3.43mm]) 304 stainless steel MIG welded to band.
(standard S8 and S12) |
7 Gauge (0.179" [4.55mm]) steel MIG welded to band. (Contact PSI) |
12 gauge (0.105" [2.667mm]) steel MIG welded to band (Model SL8) |
Hardware (Threaded Studs, Nuts and Washers)
Threaded Studs = 5/16" - 18 x 2-1/2"
304 staianless steel or plated |
Hex Nuts = 5/16" |
Washers = 5/16" SAE 2330 |
Configurations (Threaded Studs, Nuts and Washers)
8" (203.2mm) Band = 6 studs, 12 nuts and washers |
12" (305mm) Band = 8 studs, 16 nuts and washers |
Material Specifications for G and GN Runners
Runners (G and GN)
NOTE: GN Material is the PSI Standard Material
Sizes and Configurations
2" (51mm) Wide Glass Reinforced Polyester (G) or Nylon Runners (GN) |
4" (101.6mm) thru 12" (305mm) = 2 top and 2 bottom
14" (356mm) thru 36" (914mm) = 2 top and 4 bottom
38" (965.2mm) and over = Consult Factory |
Runner Specifications (G and GN)
Tensile Strength,
(ASTM D638) | 17,600 psi (1,237kg/cm²) |
Flexural Strength,
(ASTM D790) | 25,300 psi (1,779kg/cm²) |
Compression Strength,
(ASTM D695) | 18,000 psi (1,266kg/cm²)
(10% Deformation) |
Deflection Temp. @ 264 psi,
(ASTM D648) | 405°F (205°C) |
Effective Runner Heights and Lengths - G and GN
Sizing carrier pipe O.D. and casing I.D. can be misleading at times due to a difference between nominal and effective dimensions.
When sizing, make sure to consider effective runner height. Two heights are available/used; custom positioning in the casing can be
achieved with riser heights.
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Heights - Nominal Versus Effective
2" Wide Glass Reinforced Nylon or Polyester Runners
Nominal = 1.0" (25.4mm) - 1.5" (38.1mm)
Effective = 1.07" (27.2mm) - 1.70" (43.2mm) |
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Lengths - Effective
2" Wide Glass Reinforced Nylon or Polyester runners
7.0" (177.8mm) - 11.0" (279.4mm)
Glass reinforced polymer runners are standard in 2" (50.8mm) widths for Model C (coated).
PSI GN glass reinforced nylon runners have 5 times the compressive strengthof polyethylene runners. Our Model
G polyester 2" wide runners are particularly designed for heavier pipes and longer pulls. |
Warranty
All products are warranted against failure caused by manufacturing defects for a period of one year. Any product found to be
so defective and returned within one year from date of shipment will be replaced without charge. The above warranty is made in
lieu of, and we disclaim, any and all other warranties,
expressed or implied, including the warranties of merchantability and
fitness for a particular purpose, and buyer agrees to accept the products without any such warranties. We hereby disclaim any
obligation or liability for consequential damages, labor costs or any other claims or liabilities of any kind whatsoever.
Installation Instructions for Stainless Steel Casing Spacers
Always Wear Appropriate Safety Equipment and Follow
All Your Company Regulations!
In general, the actual physical insertion method is left to the expertise of the installation contractor and beyond
the scope of PSI-Pipeline Seal and Insulator, Inc.
The following are suggested installation techniques and guidelines that should be taken into consideration when installing
the casing spacers to the carrier pipe and handling prior to insertion.
-
It is absolutely critical that when installing the casing spacer that the spacers are lined up perfectly straight on the carrier pipe.
All runners should line up straight like the sight through a gun barrel, making sure all segments of the spacer correspond to the drawing.
- When handling the pipe it is also critical that the load is uniformly applied to all casing spacers on each joint of pipe and not just one.
Furthermore, caution should be taken so they do not set the carrier pipe down with the casing spacers attached unless it is on a cut-a-way
section of the casing pipe so the runners are bearing the weight uniformly. The weight should be uniformly distributed
to all bottom runners at one time. Better yet, until the pipe is being installed, have the contractor place sand bags
or similar material under the pipe to bear the weight.
- The casing spacers should be uniformly tightened so that approximately ½” space (by design) exists at each flange of the
casing spacer. The studs at each flange should be tightened uniformly which should result in a torque reading of 60 inch-pounds
(5 foot-pounds)*. Spacing between casing spacers is as detailed on the project or in accordance with the latest PSI literature.
- It is desirable to restrict or minimize rotation or rifling of the carrier pipe within the casing unless the spacers are
designed with equal length runners and specifically intended to allow for rotation.
- Spacers are manufactured with requested clearance design. If weld beads are excessive (more than ¼”), bore of casing
beyond quality tolerances, bend or sags exist in the casing, these tolerances could be diminished. Call PSI @ 800-423-2410
if any of these conditions exist.
*In most installations, torque wrenches are not used.
The nuts are tightened on the studs sufficiently, but not so much as to bend the flanges of the casing spacers.
How To Order Stainless Steel Casing Spacers
To order stainless steel casing isolators please indicate the following:
- Quantity
- Type Finish
- Band Width
- Runner Width
- Carrier Pipe O.D.
(Type and coating thickness if applicable.) - Casing Pipe I.D.
(Type and coating thickness if applicable.)
- Carrier Pipe Joint O.D. (if applicable)
- Carrier Pipe Position within Casing
- Length of Crossing
-
Contact your local distributor or Pipeline Seal & Insulator, Inc.
Click here
for more detailed ordering instructions.
Distributor Locator
Click here
for a PDF RFQ Interactive Form/Worksheet
Acrobat 8.0 required.
A PDF form that may be filled out, resaved and sent as an attachment via e-mail or printed out and fax'ed back to PSI
For version 8.0 of Adobe Acrobat visit www.adobe.com
Contact PSI
Typical Specification for Stainless Steel Casing Spacers
Model "S" Stainless Steel Stainless Steel Casing Spacer/Isolator Specification
Factory made casing spacers/isolators of the following description shall be installed on any carrier pipe passing through a pipe casing or tunnel.
They are designed to support and protect the carrier pipe, and electrically isolate the carrier pipe from the casing.
Stainless Steel Casing Spacers/Isolators with risers shall be Model S8G-2 for pipes up to 24 inch diameters and Model S12G-2 for
larger pipe sizes as manufactured by Pipeline Seal & Insulator, Inc., Houston, TX., or Engineer approved equal, provided and installed
where shown on drawings and in accordance with these specifications.
Alternate considerations shall be submitted to Engineer 14 days
prior to bid opening for consideration of other manufacturers of casing spacers. The spacer insulator “system” shall be designed and
fabricated for the specific project and application for which they are furnished.
The casing spacer/isolator system manufacturer
must have a current ISO 9001:2000 Registered Quality Assurance Program.
Band - shall have a minimum 14 gauge 304 stainless steel band.
Bands shall be two segment, 8-inch wide for Model S8G-2 and 12-inch wide for Model S12G-2. For carrier pipes 42-inch diameter and
larger, bands shall be three or more segments.
Steel Risers - high grade 304 stainless steel, minimum 10 gauge thickness shall be fabricated
to support the carrier pipe and its liquid load. Risers shall be sized to position the carrier pipe in the casing, support all loads
and provide proper contact for the isolation function.
Liner - The casing spacers/isolators shall have a flexible PVC liner of 0.09 inch thickness with a
Durometer "A" 85-90 hardness and a min. 58,000 volt dielectric strength.
Runners - The runners shall be of high pressure molded Glass Reinforced Polymer with a minimum compressive strength
of 18,000 psi, 2-inch in width and a minimum of 8 inches long (11-inch for S12G-2).
Polyethylene runners are not an acceptable alternative. The runners shall be attached to the band or riser by
3/8 inch welded stainless steel studs and lock nuts which shall be recessed far below the wearing surface on the runner.
The recess shall be filled with a corrosion inhibiting filler.
Hardware - The band section shall be bolted together with 304 stainless steel studs, nuts and washers.
Hardware shall be 5/16-inch for pipes up to 42-inch diameter and 3/8-inch for carrier pipes 42-inch and larger.
Quality Assurance
Each spacer/isolator shall be manufactured at a facility
that has a Registered ISO 9001:2000 Quality Management System. Copy of current ISO 9001:2000 Registration shall be provided with
material submittal.
Considerations
The above specification is
considered sufficient for most pipe sizes and types up to 36-inches and casing lengths up to 300 feet. For larger size pipes or
longer or unusual casings, please contact Pipeline Seal and Insulator, Inc.
End Seal Specification
After insertion of the carrier pipe in the casing,
the ends of the casing shall be closed by installing a PSI Model "C", Model "S" or Model "FW" casing end seal as
manufactured by Pipeline Seal and Insulator, Inc., Houston, TX.
Link-Seal® End Seal Specification
(Carrier Pipe Must
Centered Within Casing)
After insertion of the carrier pipe in the casing, the ends of the casing shall be
closed by installing the Link-Seal® end seals and a 1/8" thick synthetic rubber end seal equal to the PSI Model "C" end seal.
Both as manufactured by Pipeline Seal and Insulator, Inc., Houston, TX.
Typical Specification in PDF Format
Other Resources for Stainless Steel Casing Spacers
Related Products to Stainless Steel Casing Spacers
- End Seals
Models "C" (Pull-on), "S" (Standard Pull-on), "W" (Wrap Around) and "FW" (Fire Resistant)
- Link-Seal® Modular Seals
Link-Seal® is an excellent method for enclosing the end of a casing when the pipe is center within the casing.
- Custom Isolators
Multiple carrier spacers are used for inserting different size pipes, conduits and wires into casings.
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