PSI Casing Spacer

Banded Wood Skids

Low labor cost - installed by one person

Labor intensive, high labor costs

Easily secured in place

Easily dislodged

Quick installation

Hard to field construct

Supports pipe and protects coating

Rots and allows settlement

Assured electrical insulation

Non-insulating - allows corrosion

Strength for jack and bore

Swells and breaks pipe joints

Resists weight of pipe and product

Uneven Load on Pipe

Long-term corrosion protection

Allows bacteria & differential oxygen concentration corrosion

Friction varies according to wood hardness

Slides easily (friction coefficient = 0.1 to 0.6)

Easily field adjustable for gravity sewers

Adjustable but extremely time consuming

Eliminates Blown Sand or Pea Gravel

Requires annulus space filler

35 years of in-field proven reliability

High failure rate

Engineered for the Project

At discretion of job site laborer

To maintain the position as an industry leader, a number of unique design improvements have been engineered into PSI's line of casing spacers. For example, PSI was the first to offer:

• Heat fused PVC coating for superior corrosion protection or economical corrosion resistant paint.
• Stud mounted and/or projection welded glass rein-forced polymer runners molded under high pressure - 18,000 psi compressive strength (1,265 kg/cm2).
• Deeply embossed flanges for added strength during tightening of flange bolts.
• Heavy duty PVC inner liner as back up insulation and protection of pipe or coating.

Painted Mild Steel or Stainless Steel Casing Spacers for 4" to 120" Pipe Diameters and Above

Tough, heavy duty painted steel (Model A) or 304 stainless steel (Model S) spacers are available for large diameter pipe, or unusually heavy pipe, for long casings or wherever maximum strength and toughness are required. Standard models include diameters of 4" (100 mm) through 120" (3,048 mm) with 8" (200 mm) or 12" (300 mm) band widths. Runner configurations may be specified to match application and carrier/casing differential.

PVC Fusion Coated Spacers for Added Corrosion Resistance

In addition, fusion coated steel (Model C) casing spacers may be ordered for the ultimate in strength, toughness and extended life. They also are available in diameters of 4" (100 mm) through 120" (3,048 mm) and larger.

Applications:
Rugged, heavy duty steel casing spacers with tough glass reinforced polymer insulating runners are designed for ease of installation on:
• Concrete Pipe
• Ductile Iron Pipe
• Plastic Pipe
• Steel Pipe

Spacers Accommodate:
• Mechanical Joints
• Push-on
• Restrained
• Welded Joint Pipe

Sized for Pipes:
• 4" (100 mm) dia. to 120" (3,048 mm) and larger.
• Standard position, centered or restrained.
• Small or large carrier/casing differentials.
• Electrical isolation of carrier pipe from casing for corrosion protection.

Casing End Seals for Protecting the Annular Space

To complete the line, PSI end seals (Models C, S & W) may be manufactured for any carrier / casing differential. They are used to create a seal or barrier between the carrier pipe and casing. To insure filling material is maintained within or foreign objects kept out of the annular space Link-Seal® Modular Seals may be used to positively seal the carrier pipe in the casing. For more information on Link-Seal® Modular Seals, contact Corrosion Control Products Company.

Individually designed to accommodate custom carrier / casing combinations. Made of 1/8" thick, specially compounded synthetic rubber for long life and easy installation.

Specifically designed for existing installations. Simply remove plastic backing from self-curing rubber and press exposed surfaces together. Available for all carrier/casing differentials.

Made of special synthetic rubber for long life and easy installation, the highly flexible "S"-shaped seal is available for ANSI steel pipe specifications. Band locating ribs are on the outside, with special sealing ribs on the inside under the band to pre-vent leakage.

This model has been developed exclusively for situations involving a need for fire retention. They are applicable to casing through dikes in tank farms, fire walls or wherever a casing may be in a fire prone area.

may be used to seal the ends of casings when the carrier pipe is centered. In fact, double protection may be achieved by using a Link-Seal Modular Seal in combination with any of the End Seals above.

Painted steel casing isolator with an 8" (203 mm) wide steel band with 2" (50.8 mm) glass reinforced runners.

Painted steel casing isolator with a 12" (305 mm) wide steel band with 2" (50.8 mm) glass reinforced runners.

Coated steel casing isolator with a 12" (305 mm) wide steel band with 2" (50.8 mm) glass reinforced runners.

Glass Reinforced Polymer Runners

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.

A. 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 and 12 gauge steel.

B. 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.

C. 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.

D. 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.

E. 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.

Specify:

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

Example:

Coated 12" (305 mm) wide steel band casing spacer with 2" (50.8 mm) wide glass reinforced polymer runners for a 16" (400 mm) ductile iron pipe with a 17.40" (400 mm) outside diameter within a casing pipe with a 23.25" (590 mm) inside diameter, carrier pipe joint O.D. 20.00" (508 mm), standard position.

C 12 G-2 17.40 x 23.25 - 20.00" - S

Type Finish
A = Painted
C = Coated
S = 304 Stainless Steel

Band Width
8 = 8" Band
12 = 12" Band

Carrier Pipe O.D.
Indicate actual O.D., including coating.

Casing Pipe I.D.
Indicate actual I.D., including coating.

Carrier Pipe Joint/Bell O.D. (if applicable).
Indicate actual O.D. including coating

Position within Casing
S = Standard
C = Centered
CR = Centered/Restrained
NCR = Non-centered/Restrained

Pipeline Seal and Insulator (PSI) is the industry leader in the design and fabrication of multiple carrier spacers used for inserting different size pipes, conduits and wires into casings. Projects have ranged from simple dual pipe configurations to complex pipe / conduit arrangements, designed for maximum strength and efficiency within all pipe specifications.

Customized spacers are also available with electrically isolated rollers to ease installation of unusually heavy carrier pipes or for extremely long casing pipe runs. PSI Models A (painted), C (coated) or S (stainless steel) may be designed and fabricated to meet the needs of your custom project.

All custom multiple carrier spacers share the same features as our single carrier spacers described throughout this web page. However, the multiple carrier spacers are considerably more complex, and therefore require more detailed design considerations.

Please contact Corrosion Control Products Company during your design phase. We have over thirty-five years experience with custom casing spacers and can provide you with insights into design criteria based on "real world" applications in the water and wastewater industry.

PSI offers the non-metallic PE casing spacer and the all non-metallic Ranger II® casing spacer. The Ranger II casing spacer requires no bolts and nuts, can center or restrain pipe, and can compensate for grade adjustments with a variety of different runner heights. Ranger II casing spacers are designed for carrier pipe diameters from 0.83" (21 mm) to 37.60" (955 mm) in diameter.