Coated Casing Spacers - Isolators (Model C)

Description

An extremely tough and durable heat fused fluid bed thermo set cross-linked polymer coating is offered on steel casing spacers/isolators 4" and larger, with 8" and 12" band widths. The cold formed steel casing spacer/isolator band (risers where applicable) and studs for runner mounting are grit blasted, heated and fusion coated with a cross-linked epoxy polymer formulation, providing a minimum 0.010 (0.254mm) thick coating over the entire metallic surface. A post cured cycle strengthens the bond and provides an even more uniform coating.

Other heat fused formulations are also available for custom orders and applications.
The runners are attached with 3/8" diameter studs, which are fusion welded to the band before it is powder coated. They are recessed far below the wearing surface of the runner. After the runner is anchored to the band, the stud counter-bore is filled with specially formulated caulk to assure a water tight seal for the stud and the locking fastener.

Targeted Use - Energy, Water and Filled Casings

• 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 Coated Casing Spacers

Benefits/Features of Coated 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 - PSI Cross-Linked Epoxy Coated
Metallic Casing Spacers/Isolators

Band

Flanges of the spacer are deep embossed and the corners are chamfered.

Configurations - Band

Liner - T.P.E. Liner (Temperature Extremes)
Model C12 Only

Risers

Hardware (Threaded Studs, 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

Installation Instructions for Coated 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 Coated Casing Spacers

To order Coated Casing Isolators please indicate the following:

1. Quantity
2. Type Finish
3. Band Width
4. Runner Width
5. Carrier Pipe O.D.
   (Type and coating thickness if applicable.)
6. Casing Pipe I.D.
   (Type and coating thickness if applicable.)
7. Carrier Pipe Joint O.D. (if applicable)
8. Carrier Pipe Position within Casing
9. Length of Crossing
10. Contact your local distributor or Pipeline Seal & Insulator, Inc.

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for more detailed ordering instructions.

Distributor Locator

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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
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Contact PSI

Typical Specification for Coated Casing Spacers

Factory made casing spacers/isolators of the following description shall be installed on any carrier pipe passing through a pipe casing. They are designed to protect the carrier pipe corrosion coating and electrically isolate the carrier pipe from the casing.
Casing spacers/isolators shall be PSI Model C8GN-2 for carrier pipes up to 24-inch diameters and Model C12GN-2 for larger pipe sizes as manufactured by Pipeline Seal and Insulator, Inc., Houston, TX.
Casing spacers/isolators shall have a minimum 14 gauge steel band and where required, 10 gauge risers. The band, risers and connecting studs shall be welded and grit blasted at the factory before the application of a fluidized bed thermo set cross-linked Epoxy coating of between 10-16 mils thickness. The coss-linked Epoxy coating shall provide good resistance to acids and alkalies and excellent resistance under ASTM B117 salt spray tests.
The spacers/isolators shall have a flexible PVC inner liner of 0.09 inch thickness with a durometer “A” 85-90 hardness and a minimum 58,000 volt dielectric strength. The runners shall be high pressure molded glass reinforced polymer with a minimum compressive strength of 18,000 psi per ASTM D638. The runners shall be 2.0 inch in width and a minimum of 7.0 inches long for C8GN-2 models and 11” for C12GN-2 models (polyethylene runners are not an acceptable alternative). The runners shall be attached to the band or riser by 3/8” welded 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. The band section shall be bolted together with cadmium plated studs, nuts and washers.
The casing spacers shall be PSI Model C Metallic Casing Spacers as manufactured by Pipeline Seal and Insulator, Inc., Houston, Texas or engineered approved equal. Alternate considerations shall be submitted to Engineer 10 days prior to bid opening.

Considerations
The above specification is considered sufficient for most pipe sizes and types up to 36-inches and casing lengths up to 1,000 feet. For larger size pipes or longer or unusual casings, please contact Pipeline Seal and Insulator, Inc. Heavy Gauge Steel Bands and Steel Risers may be required.

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", Model "W" or Model “R” casing end seal as manufactured by Pipeline Seal and Insulator, Inc., Houston, TX. Energy Market Note: For Tank Farm Applications and Fire Resistant applications, specify Model “FW” casing end seal as manufactured by Pipeline Seal and Insulator, Inc., Houston, TX.

Link-Seal® End Seal Specification
(Carrier Pipe Must Be 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 1/8" thick synthetic rubber end seals equal to the PSI Model "C" or Model “W” end seal. Both as manufactured by Pipeline Seal and Insulator, Inc., Houston, TX.

Quality Assurance
Each spacer/isolator shall be manufactured at a facility that has a Registered ISO 9001:2008 Quality Management System. Copy of current ISO 9001:2008 registration shall be provided with material submittal.

Typical Specification in PDF Format

Related Products to Coated 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.

PSI Contacts for Coated Casing Spacers

Pipeline Seal & Insulator, Inc.
6525 Goforth Street, Houston, TX 77021
Tel: 713-747-6948  •  Fax: 713-747-6029
Toll Free: 800-423-2410
e-mail: info@psipsi.com
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