1.1 This practice describes the procedures for renewal of potable water pipes by using polymers based on isocyanate chemistry, generally known as polyurethane and polyurea. This practice covers design considerations, material requirements, installation techniques, inspection, and testing required for potable water pipe. 1.2 This practice applies to pipes with a minimum diameter of 4 in. (10 cm). 1.3 Several material types and grades are described to suit specific diameter ranges and design specifications. No upper limit on pipe diameter is imposed because Type 1 lining described herein is not tied to structural performance. The recommended range for Type 2 is 4 to 12 in. (10 to 30.5 cm) and for Type 3 is 4 to 48 in. (10 to 122 cm). Material Grade 1 may be used for lining Types 1 and 3 while Grade 2 is limited to Type 2 linings. These recommended ranges apply to metallic pipes like cast iron, ductile iron, and steel. 1.4 If the liner is to be coated on a nonmetallic surface, organic or inorganic, then additional testing should be done to assess the viability of these materials to adhere or be compatible or both with that surface. 1.5 In general, these materials can be applied to a variety of metals and ceramic and organic surfaces. 1.6 The lining material shall be certified for usage with potable water by ANSI/NSF Standard 61 or equivalent with the Water Quality Association (WQA), Underwriters Laboratories (UL), or other recognized and experienced entities using the smallest pipe diameter for which they will be used. 1.7 Units-The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.8 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
This standard is needed for development and applications of new products in structural spray for pipeline renewals.
Keywordspipeline renewal; structural spray; trenchless technology; water main renewal
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Draft Under Development