The spacers should be of a projection type that has a minimum number of projections around the circumference that total the number of diameter inches. For example: 8" pipe should have a minimum of 8 projections and 18" pipe should have a minimum of 18 projections.
Spacing between spacer rings (span) should be calculated based on the actual installed load (weight of pipe filled with liquid) but should not exceed 10 feet / 3 meters. Refer to the tables in the current Raci Brochure and website for the load carrying capacity of each type of Raci spacer used.
Spacer should also have a minimum height that clears the pipe bell or as otherwise indicated on the plans.
Casing spacers should be projection type – non metallic spacers constructed of preformed sections of high-density polyethylene. Spacers should be ISO 9001:2000 certified for strength and quality.
Casing spacers should be installed using double backed tape provided with the spacers in order to fasten them tightly to the carrier pipe.
