PSI Casing Spacers Overview

 

 

Carrier Pipe Compatibility with Spacer Model - Guidelines

  Non-metalic Casing Spacers Metalic Casing Spacers
  Model PE Model HT Ranger II Models C & S with 8" band Models C & S wih 12" band
Steel E E E E E
Steel (Mortar Coated) U U U NR E
Ductile Iron U U G G E
Cement U U U E E
Profile Pipe U U S E E
Clay NR NR U E E
HDPE NR NR E E E
PVC Water Pipe NR NR E E E
PVC Scewer Pipe NR NR E E E


E
= Excellent   NR = Not Recommended   G = Good   F = Fair   S = Satisfactory   U = Unsatisfactory

General Notes:The foregoing performance data are intended as guidelines only. Performance suitability for specific applications should be determined by the user. Variation in carrier pipe type, carrier pipe diameter, casing length, casing condition, and position may preclude suggested service use. Casing Spacer selection is at the sole risk of the user.

 


Standard Material Property Comparison - PSI Casing Spacers

For detailed information and higher/lower metallic temp. range please view specific Model pages.

  Non-Metalic Casing Spacers Metallic Casing Spacers
  Model PE Model HT Ranger II Model C8 - C12 Models S8 - S12
Band Material Polyethylene Poly-carbonate Polypropylene 14 Gauge PVC Coated Steel 14 Gauge 304 Stainless Steel
Runner Material Polyethylene Poly-carbonate Polypropylene Glass Reinforced Nylon Glass Reinforced Nylon
Riser Material  None None None  10 Gauge Coated Steel  10 Gauge Stainless Steel 
Liner Material  None High Temp Plastic  None  Polyvinyl Chloride  Polyvinyl Chloride 
Hardware  Plated Steel Plated Steel  None  Plated or 304 Stainless Steel  304 Stainless Steel 
Compressive Strenght  3,200 psi 12,500 psi  3,000 psi  18,000 psi  18,000 psi 
Temperature Range  180F. Max 280F. Max  -40F ro +180F  -22F to +121F  -40F to +170F 

 

 

Model C Metallic Casing Spacer

PSI polyvinyl chloride coated (PVC) steel casing isolators are often selected due to their strength and excellent corrosion resistance.

An extremely tough and durable heat fused plastic coating is offered on steel casing isolators 4" and larger, with 8" and 12" band widths. The cold formed steel casing isolator band, complete with runner studs installed, is vapor degreased, primed, heated and fusion coated with plastic, providing a minimum .010" (.254 mm) thick coating over the entire band and runner studs. A post cured cycle strengthens the bond and provides an even more uniform coating. Polyvinyl chloride is available as a standard. Other heat fused plastic coatings 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 PVC 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 to assure a water tight seal for the stud and the lock fastener.

Model Options

  • Model C8G-2: Coated Steel casing isolator with an 8" (203 mm) wide steel band and 2" (50.8 mm) wide glass reinforced runners.

  • Model C12G-2: Coated Steel casing isolator with a 12" (305 mm) wide steel band and 2" (50.8 mm) wide glass reinforced runners.

Model S Metallic Casing Spacer

Tough, heavy duty 14 gauge (0.74" / 1.88 mm) 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" (9.5 mm) 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.

Model Options

  • Model S8G-2: Stainless Steel casing isolator with an 8" (203 mm) wide steel band and 2" (50.8 mm) wide glass reinforced runners.

  • Model S12G-2: Stainless Steel casing isolator with a 12" (305 mm) wide steel band and 2" (50.8 mm) wide glass reinforced runners.

Typical spacing for all PSI metallic casing isolators / spacers
  • C8 / S8 = 7' (2.1 m) to 10' (3.0 m)

  • C12 / S12 = 8' (2.4 m) to 12' (3.7 m)

An isolator/spacer should be placed within 2' (0.6 m) on each side of a coupling or joint and within 1' (0.3 m) of each end of the casing.



Ranger Il Casing Spacer
An all non-metallic spacer system designed to ease carrier pipe insertion, reduce inventory costs, make installation quick and easy to last for the life of the piping system. Features:
  • All non-metallic. No nuts, bolts, washers or any other metal parts to corrode or degrade over time.
  • Segmented pieces - small inventory may be used to accommodate a large variety of pipe styles, types and diameters. No extra trips from job site to warehouse for additional parts.
  • Easy assembly. Simply slide the segments together and ratchet tight with the patented Slide-Lock connecting system.
  • Wide variety of runner heights to allow numerous options for pipe positioning within the casing.
  • Manufactured from UV resistant polypropylene.
  • No special tools required for installation.
  • Accommodates plastic, ductile iron and steel carrier pipe (not suitable for concrete pipe).
Model Options:
For carrier pipe diameters from 0.83" (21 mm) to 37.60" (955 mm) in diameter. 
Band/Runner Segment Specifications

Material

UV resistant polypropylene.

Compressive Strength

3,000 lbs/sq.in (211 kg/sq.m)

Temperature

-40ºF to +180ºF (-40ºC to +82ºC)

Impact Strength

1.5 ft.lb/sq.in (10.34 kPa)

Dielectric Strength

800 Volts/mil min.

Color

Black

Liner

None

Typical Installation
Based on 20' (6.1 m) carrier pipe segments in a casing of not more than 300' (91.5 m). Consult Farwest for longer casings and for concrete pipe.
Typical Specification Casing spacers shall be all non-metallic (polypropylene), molded in segments for field assembly without any special tools. Spacer segments shall be secured around carrier pipe by insertion of a cinching spline. The casing spacer polymer shall contain ultraviolet inhibitors and shall have a minimum compressive strength of 3,000 psi, an 800 Volts/mil dielectric strength and impact strength of 1.5 ft-Ibs/inch. Each casing spacer shall have full length, integrally molded skids extending beyond the bell or mechanical joint of the carrier pipe. Each casing spacer 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. Recommended Maximum Spacing All Ranger II Isolators/Spacers should not exceed 8' (2.4 m) center to center.
An isolator/spacer should be placed within 2' (0.6 m) on each side of a coupling or joint and within 1' (0.3 m) of each end of the casing. For more details on spacing, contact Farwest.


 

Model PE Casing Spacer

High density (linear), injection molded virgin polyethylene casing isolators / spacers provide positive insulation, high abrasion resistance and low coefficient of friction for a wide variety of energy industry double containment carrier / casing pipe applications. They are extremely light in weight and easy to handle during installation.

A ribbed inner surface prevents slippage and guards against carrier pipe coating damage while the outer surface may include any one of several molded runners to accommodate 2" (50.8 mm) x 4" (101.6m m) or larger carrier / casing differentials.

One piece solid molded segments provide for maximum load bearing. Hardware includes cadmium plated steel studs, nuts and washers. A screwdriver is the only tool needed for installation.

Model PE Options:

  • 3/4" (19 mm) through 12" (305 mm) = 2 segments, T\pop/bottom.

  • 14" (356mm) through 48" (1,219mm) and larger = multiple segments.



Model HT Casing Spacer

A unique formulation of polymers is used in the manufacture of the Hi-Temp isolators/spacers giving them the capability of being used for applications that may reach 280°F(138°C). A high-temperature plastic liner improves friction with the carrier pipe while protecting it from damage to either pipe or coating.

Typical Installation
Based on 20' (6.0 m) carrier pipe segments in a casing of not more than 300' (91.5 m). Consult Farwest for longer casings and for concrete pipe.

Model HT Options

  • 3/4" (19 mm) through 12" (305 mm) = 2 segments

  • Top/bottom 14" (356 mm) and above = contact Farwest for availability.

Recommended Maximum Spacing
All model PE and Hi-Temp Polymer Isolators / Spacers should not exceed 5' (1.5 m) to 8' (2.4 m) center-to-center. An isolator / spacer should be placed within 2' (0.6 m) on each side of a coupling or joint and within 1' (0.3 m) of each end of the casing.