3 02/18 INSTALLATION: A 6-inch layer of sand or fine gravel shall be placed and tamped in the trench bottom to provide uniform bedding for the pipe. The entire trench width shall be evenly backfilled with a similar material to the bedding in 6-inch compacted layers to a minimum height of 6 to 12 inches above the top of the insulated piping system. The remaining trench shall be evenly and continuously backfilled in uniform layers with suitable excavated soil to a minimum depth of 30". The entire piping system installation shall be engineered by the system manufacturer. Complete installation drawings showing all expansion compensation, anchors, thrust blocks, insulation, and dimensions will be provided to the engineer for approval before fabrication commences. The contractor shall include any and all offsets that may be required to provide a complete installation in accordance with the existing conditions at the site and/or the requirements of the manufacturer’s final installation drawings. SUPER WELD-TITE APPLICATION ENGINEERING PIPE SYSTEM DESIGN: Standard design techniques and practices for Super Weld-Tite shall be used. Thermal Pipe Systems, Inc. Engineering Department may, on request, provide certain detailed design aspects of the piping for each project based on the project documents and drawings provided by the Design Engineer. It is understood that the project specifications and layout drawings will specify the type of service, location of the site, temperature and pressure classifications, soil conditions, general path and elevations of the system, location and design of manholes, known obstacles, size of the carrier pipe, and the maximum permissible heat losses. It is further understood that other requirements, such as the type of pipe, the location size and capacity of valves, traps, pumps, anchors, controls, expansion devices and special structural elements will be provided by the Design Engineer. The design provided by Thermal Pipe Systems, Inc. and their engineers for the piping will be in accordance with ANSI B31.1 and good engineering practices. INSULATION: Thicknesses of insulation for Super Weld-Tite pipe, as shown on the page four, are for temperatures up to 450F. DIMENSIONS AND WEIGHTS: Dimensions and weights of insulated Super Weld-Tite piping and fittings are as shown on the following pages. The piping may be furnished in 20 ft. and/or 40 ft. lengths. SPECIAL DESIGN: Special design of the Super Weld-Tite system components is the responsibility of the Design Engineer.