PSI Casing Spacers Guidelines, Runner Heights & Positioning

PSI Casing Spacers Standard Model Guidelines

Terminology
Casing Spacer and Casing Isolator are the same product and serve the same application needs. The casing isolator terminology originated in the Energy Market in the 1960’s. PSI prefers the term Casing Spacer.
The industry also uses the following terms in lieu of Casing Spacer:

Chalks
Skids
Spiders

Pipe Isolators
Pipe Supports
Clusters

Carrier Pipe Diameter Range
Carrier Pipe Diameter Range Chart

Carrier Pipe Insertion Length

Carrier Pipe Compatibility with Spacer Model
	Non-metallic Casing Spacers				Metallic Casing Spacers
	Model PE	Model HT	Model AZ	Ranger II®	Models C & S 8″ band	Models C & S 12″ band
Steel	E	E	S	E	E	E
Steel (Mortar Coated)	U	U	U	U	NR	E
Ductile Iron	U	U	U	G	G	E
Cement	U	U	U	U	E	E
Profile Pipe	U	U	U	S	E	E
Clay	NR	NR	U	U	E	E
HDPE	NR	NR	S	E	E	E
PVC Water Pipe	NR	NR	G	E	E	E
PVC Sewer Pipe	NR	NR	G	E	E	E
Legend: E = Excellent NR = Not Recommended G = Good F = Fair S = Satisfactory U = Unsatisfactory

Standard Material Property Comparison of Casing Spacer Models
	Non-metallic Casing Spacers				Metallic Casing Spacers
	Model PE	Model HT	Model AZ	Ranger II®	Models C8 – C12	Models S8 – S12	Models SL8
Band Material	Polyethylene	Polycarbonate	Polypropylene	Polypropylene	14 Guage PVC Coated Steel	14 Guage 304 Stainless Steel	16 Guage 304 Stainless Steel
Runner Material	Polyethylene	Polycarbonate	Polypropylene	Polypropylene	Glass Reinforced Nylon	Glass Reinforced Nylon	Glass Reinforced Nylon
Riser Material	None	None	None	None	10 Guage Coated Steel	10 Guage Stainless Steel	12 Guage Stainless Steel
Liner Material	None	High Temp Plastic	None	None	Polyvinyl Chloride	Polyvinyl Chloride	Polyvinyl Chloride
Hardware	Plated Steel	Plated Steel	Plated Steel	None	Plated or 304 Stainlesss Steel	304 Stainless Steel	304 Stainless Steel
Compressive Strength	3,200 psi	12,500 psi	3,000 psi	3,000 psi	18,000 psi	18,000 psi	18,000 psi
Temperature Range	180° Max	280° Max	-40° to 180°	-22° to 212°	-40° to 170°	-40° to 170°	-40° to 170°

PSI Casing Spacers Runner Height Options

Model PE Non-metallic Casing Spacer Model PE runners are molded as an integral part of each segment. Runner heights range from 5/16″ (7.94mm) through 1 1/2″ (38.1mm) depending on model dimensions. Runner height is symmetrical around spacer. Runner/Band width for PE spacers is 3.0″ (76.19mm) through 6.25″ (158.75mm). Refer to Model PE pages for detailed information on PE casing spacers.	For 3/4″ to 12″ diameters: runner heights range from 5/16″ to 7/8″. For 14″ to 48″ diameters: runner heights range from 1″ to 1 1/2″.
Model Ranger II® Non-metallic Casing Spacer Ranger II&174; runners are molded as an integral part of each segment. Runner heights range from 1.5″ (38.1mmmm) through 6.89″ (175.0mm). Runners may be placed asymmetrically around spacer. Runner/Segment width for Ranger II® spacers is 2.13″ (54.1mm) through 8.86″ (225.04mm). Refer to Ranger II® pages for detailed information on Ranger II® casing spacers.	For 0.83″ to 37.60″ diameters: runner heights range from 1.50″ to 6.89″.
Model AZ Non-metallic Casing Spacer Model AZ runners are molded as an integral part of each segment. Runner heights range from 5/8″ (15.9mm) through 4 1/2″ (114.3mm) depending on model dimensions. Runner height is symmetrical around spacer. Runner/Band width for AZ spacers is 5.2″ (132.0mm). Refer to Model AZ pages for detailed information on AZ casing spacers.	For 3.85″ to 13.75″ diameters: runner heights range from 5/8″ to 4 1/2″.
Model HT (High Temp) Non-metallic Casing Spacer Model HT runners are molded as an integral part of each segment. Runner heights range from 5/16″ (7.94mm) through 7/8″ (48.5mm) depending on model dimensions. Runner height is symmetrical around spacer. Runner/Band width for HT spacers is 3.0″ (76.19mm)through 5.0″ (127.0mm). Refer to Model HT pages for detailed information on HT casing spacers.	For 3/4″ to 12″ diameters: runner heights range from 5/16″ to 7/8″.
Model C Coated Metallic Casing Spacer Model S Stainless Steel Metallic Casing Spacer 2″ (50.8mm) wide nylon or polyester glass reinforced runners. Effective runner height is 1.07″ (27.2mm) or 1.70″ (43.2mm). Runners may be attached directly to spacer band. Runners may be attached on top of 10 or 7 guage risers to accommodate any runner height configuration. Metallic spacers are available in 8.0″ (203.2mm) or 12.0″ (304.79mm) wide bands. Refer to Model C and Model S pages for detailed information on metallic casing spacers.	For 4.00″ to 120.0″ diameters: runner heights are customized to the application. Runner may be attached directly to band. Runner height is positioned to specification by 10 or 7 guage risers.
If casing pipe has offsets or weld beads in excess of 1/8″, consider using a metallic casing spacer.

PSI Casing Spacers Positioning Guidelines

Model PE Non-metallic Casing Spacer Standard position inside casing. Runner height must be symmetrical around spacer. Refer to Model PE pages for detailed information on PE casing spacers.
Model Ranger II® Non-metallic Casing Spacer Multiple positions inside casing are possible. Different height runner segments may be mixed around carrier pipe. Runner height may be placed asymmetrically around carrier pipe. Positioning options include: standard (clear bell), centered, centered/restrained, and non-centered/restrained. Refer to Ranger II® pages for detailed information on Ranger II® casing spacers.
Model AZ Non-metallic Casing Spacer Two positions inside casing are possible: standard (clear bell) and centered/restrained. Runner height must be symmetrical around spacer. Refer to Model AZ pages for detailed information on AZ casing spacers.
Model HT (High Temp) Non-metallic Casing Spacer Model HT runners are molded as an integral part of each segment. Standard position inside casing Runner height must be symmetrical around spacer. Refer to Model HT pages for detailed information on HT casing spacers.
Model C Coated Metallic Casing Spacer Model S Stainless Steel Metallic Casing Spacer Multiple positions inside casing are possible. Runner height may be asymmetrical around carrier pipe. Positioning optinces are: standard (clear bell), centered, centered,/restrained, and non-centered/restrained. Refer to Model C and Model S pages for detailed information on metallic casing spacers.	Typical — Energy Market Typical — Water Market