1.1 This specification covers requirements and test methods for materials, dimensions, workmanship, and markings for factory manufactured high-pressure thermoplastic liner containing a reinforcing aramid fabric for the non-structural trenchless rehabilitation of water lines. This system specification includes end connections and installation procedures. It covers design pressures up to 82 bar (1189 psi) in nominal diameters from 150 with an outer diameter of 134 mm (5.28 in.) up to 500 with an outer diameter of 454 mm (17.87 in.) for installation into host pipe with nominal diameter from 6 to 20 in. 1.2 The same thermoplastic liner system may be used as a stand-alone pipeline provided that the pipeline is not buried. The piping is designed for containment and transport of pressurized liquids. The piping has sufficient flexibility to allow coiling and for use in rehabilitation of existing pipelines. The piping system is not designed to withstand external soil loads. Underground applications are limited to lining of structural host piping. 1.3 Aramid fabric reinforced thermoplastic liners are multi-layered liner products in which the core and outer sheath are melt bonded to an aramid fabric reinforcement manufactured in long continuous lengths and reeled for storage, transport, and installation. The multilayer thermoplastic and aramid fabric lining system1 governed by this specification is intended for continuous use up to 50C (122F) for the transport of sewage, non-potable water, or potable water. 1.4 The system covered by this specification is suitable for applications that meet all of the following criteria for operation and maintenance. 1.4.1 Operation 18.104.22.168The system section begins at one system connector fitting and ends at another system connector fitting. 22.214.171.124The section is constantly filled with fluid during all operating conditions. 126.96.36.199The pressure along the entire section is positive and either constant, constantly increasing, or constantly decreasing. 188.8.131.52The fluid flow velocity is constant along the entire length of the section and does not exceed 3 m/s. 184.108.40.206There are no free inlets or free outlets adjacent to the system connectors. 1.4.2 Maintenance 220.127.116.11If the section is drained for maintenance, draining in a controlled manner will allow full draining without collapsing the liner or blocking flow. This is done by assuring the outlet for draining at the lower connector has a smaller diameter than the installed liner. 18.104.22.168When fully empty, the liner may collapse flat. It will be rerounded upon reapplication of pressure and restoration of flow. 1.5 Units--The values stated in SI units are to be regarded as the standard. The values given in parentheses are mathematical conversions to inch-pound units that are provided for information only and are not considered standard. 1.6 This standard does not purport to address all of the safety concerns, is 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.
The product and applications are valuable and unique in two ways: for long-term rehabilitation of pressurized fluid lines that require a very flexible yet strong liner and shorter-term above-ground fluid pipelines, such as for emergency water delivery, temporary bypass pipelines, and other applications.
Keywordsreline pipeline repair
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
Negative Votes Need Resolution