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All pipe welds shall be performed by certified welders employed by the booster pumping system <br />manufacturer. As part of the equipment submittal, the pumping system manufacturer shall provide copies <br />of the welding certificates of the employees who are to perform the pipe welds. <br />All piping surfaces shall be prepared by sandblasting, or other abrasive blasting, prior to any welds <br />taking place. Piping or 5" diameter and smaller may be cut by saw. Piping of 6" diameter and larger shall <br />be bevel cut, and Oxyfuel or Plasma -arc cutting techniques shall be used to assure and facilitate bevel pipe <br />cuts. No saw cuts or other form of abrasive cut-offs are allowed on 6" and larger diameter pipe. <br />In all cases, short circuit transfer, spray transfer or pulse -arc transfer modes of the gas metal arc <br />welding process shall be applied semi -automatically. When utilizing the short circuit mode, shielding gas <br />shall be used. When utilizing the short circuit mode, shielding gas consisting of 50% carbon dioxide and <br />50% argon gas shall be used. When utilizing the spray or pulse -arc transfer modes, a shielding gas <br />consisting of 5% carbon dioxide and 95% argon shall be used. In all cases, welding wire with a minimum <br />tensile strength of 70,000 psi shall be employed. All tensile strength of 60,000 psi shall be employed. All <br />flange welds and butt welds of equal size pipe shall be a single continuous nonstop weld around the <br />complete circumference of the pipe. Whenever possible, vertical up weld passes will be applied to all pipe <br />welds. No vertical down weld passes will be allowed. Completed welding assemblies shall create no <br />internal obstruction, restriction or create any unintended sources of water deflection. <br />Piping of six (6) inch diameter and larger shall require a minimum of two (2) weld passes to <br />complete each weld. The first pass, or root pass, shall be applied at the bottom of the bevel cut using the <br />short circuit transfer welding mode, and the second pass, or cap pass, shall be applied over the root pass <br />using the spray or pulse arc transfer welding modes to insure that at a minimum the total weld thickness <br />shall be equal to thinnest of the two (2) pieces being welded together. <br />Dated: APRIL 8. 2024 <br />State of ILLINOIS <br />County of MARION <br />EFI-SOLUTIONS, INC. <br />Company Name <br />The above CORROSION <br />acknowledged before me o <br />DAVID A. EALY (Officer), <br />EFI-SOLUTIONS. INC.(Company). <br />Notary Public <br />PROTECTION <br />I this WSJ-{ <br />acting in <br />re <br />SYSTEM STATEMENT was signed <br />day of APRIL 2024 <br />the aforesaid capacity <br />Official Seal <br />Gina Marie Foster <br />Notary Public State of Illinois <br />rviy Commission Expires 212612026 <br />Seller's Proposal for Public Works 15 <br />and <br />by <br />for <br />