Allied Construction Associates Inc. 4/23/2021

CITY OF EVERETT SPECIAL PROVISIONS ' 7-20.3(2)D Pipe Laying— HDPE Provide HDPE leak proof, thermal, butt joints, except at field closures and other joint connections specifically identified or approved by the Engineer, and butt weld in accordance with manufacturer's recommendation and ASTM D 2657. Use tools recommended by the pipe supplier and approved by the Engineer for joint fusing. Provide manufacturer trained and certified operators for the joint fusing equipment. Provide a fusing machine having hydraulic pressure control for fusing two pipe ends together. Accurately trim the ends of pipe to form perpendicular faces prior to fusing. Provide on the fusing machine an electrically heated and thermostatically controlled heating plate containing a temperature gauge for monitoring temperature. Periodically inspect the heating plate, using a temperature stick, to assure even heating. For connections requiring flanged connections, provide a HDPE flange adapter with a 316 stainless steel follower ring with Class 125 flange bolt pattern. Provide joints between pipe sections being even with pipe interior. Internal projection beads do not need be removed from each pipe joint. Provide a butt-fused joint having true alignment between the joined pipes with uniform roll back beads resulting from the use of 1 proper temperature and pressure. Allow the joint adequate cooling time before removing pressure. Provide watertight fused joint having tensile strength equal to that of the pipe. Provide City with opportunity to inspection and accept each joint. Cut-out and replace ' defective joints at no cost to the City. City will not allow or permit the following: • Threaded or solvent—cement joints and connections. • Fabrication of fittings in the field. • Sleeve couplings, repair bands, mechanical joints, flanges and other types of pipe connections are not permitted unless shown on the Plans or authorized in ' advance by the Engineer or Inspector. Provide trench construction in accordance with 7-08.3(1)A. Place pipe in the trench in accordance with 7-08.3(2)B and this section. Backfill in accordance with 7-08.3(3)and these ' Special Provisions. Backfill and compact when HDPE pipe is at the same temperature as the surrounding soil. If using flowable CDF for bedding or backfill, fill the pipe with water and anchor pipe to counteract buoyancy. City will not allow blocking under the pipe. Provide continuous HDPE pipe entering manholes. City will not allow short PVC closure segments, except where explicitly shown on the Plans or approved by the Engineer. Provide Kor-N-Seal Boots, or equal, to seal between the pipe and manhole wall. ' 7-20.3(2)E Rubber Gasket Joints Lay sanitary sewer forcemain pipe having rubber gaskets in accordance with 7-08.3(2)E of the Standard Specifications and these Special Provisions. 7-20.3(2)F Plugs Provide plugs for pipe branches, stubs or open pipe ends in accordance with 7-08.3(2)F of the Standard Specifications and these Special Provisions. 7-20.3(2)G Jointing of Dissimilar Pipe Join dissimilar pipes in accordance with 7-08.3(2)G of the Standard Specifications and these Special Provisions. 7-20.3(3) Backfilling Place backfill material in accordance with 7-08.3(3), 7-09.3(10) and 7-09.3(11) of the Standard Specifications and these Special Provisions. 7-20.3(4) Handling of Pipe Handle pipe in accordance with 7-09.3(13) of the Standard Specifications and these Special Provisions. SEI to SRI Intertie,SRO8 Rehab Division 7-STORM, SEWER SP-149 WO No.-UP3714 I