Specifications - City of Montpelier, Vermont

Title:Montpelier District HeatingCity of Montpelier, VT33615 – Hot Water Pipe Distribution SystemIssue Date:September 25, 2012Page #:17 of 18be provided by the CONTRACTOR. Where an aluminum jacket is utilized topour the joints, the jacket shall be furnished by the CONTRACTOR, and shall beconsidered incidental to the cost for hot water pipe installation.C. Insulation Methods1. SHRINKABLE SLEEVE AND RIGID FOAM HALVES STYLEINSTALLATIONShrinkable sleeves and foam halves. Sleeves shall be placed over pipe prior towelding, and protected from dirt, debris, mud, etc. through the welding,testing, and jointing process. See Appendix C.2. POUR FOAM JOINTS WITH WELD PLUGPour Foam Joints with shrink sleeves and HDPE weld plug. See AppendixC.3. POUR FOAM JOINTS WITH SHRINK JOINT PATCHESPour Foam Joints with shrink sleeves and shrink joint patch. See AppendixC.D. VERIFICATIONPrior to performing the initial Pipeline Alarm Loop Test, the CONTRACTORshall obtain verification from the OWNER’S Project Representative that allinsulation installation is completed in accordance with the specifications and isacceptable.E. Damage & Replacement3.8 PIPE CLEANINGDamage to all hot water insulation joints, including, but not limited to jacketpenetration, trench flooding prior to insulation jointing, and mud and debrisdeposits on the interior of jacket sleeves will require TOTAL REPLACEMENTof the insulation and joint sleeve. The replacement shall be with same type ofjoint sleeve originally installed (for instance, if the joint was a Pour Foam Joint,the replacement shall be with a Pour Foam Joint). The CONTRACTOR, at nocost to the OWNER, may be required to slide new sleeves over long lengths ofpipe, or cut out and reweld sections of pipe to replace the damaged joint kit inkind. Refer to Section, 02200 ) Earthwork for information regarding trenchdewatering.A. After installation but before the final in service test, thoroughly clean the interiorof all pipes of all scale, dirt, and debris. For pipes 4 inch (100 mm) and larger thecleaning shall be accomplished with pigging or water power jetting. All debrisshall be flushed from the pipeline. For pipes smaller than 4 inch, after installationHOT WATER PIPE DISTRIBUTION SYSTEM3361517