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• Verify that the pipe and tanks are not damaged by sharp rocks or excessive abrasion <br />when the pulled into place during fusion welding and installation operations. <br />5.2.2 Fusion Welding <br />• Before pipe fusion welding operations and installations verify that solid walled pipe, <br />perforated pipe, fittings, and flanged couplings comply with product requirements of the <br />technical specifications. <br />• Verify that certified fusion welding operators will be performing the welding. <br />• Verify that caution is taken to prevent water from coming in contact with the pipe and <br />heater plates during welding operations. A shelter may be required for the fusion <br />welding machine to allow operations to continue in adverse weather conditions. <br />• Verify that heater plate surface temperatures are maintained between 375°F and 400°F <br />for both coated plates and uncoated plates. Verify that operator checks heater plate <br />surface temperatures with pyrometer. <br />• Verify that inside and outside of pipe ends are cleaned to remove dirt, water, grease, and <br />other foreign material. <br />Page 50 0 <br />Number of Rows High <br />Nominal Pipe Size (in.) <br />For SDRs* 18 and <br />for SDRs* over 18, up <br />for SDRs* over 26, up <br />under <br />to 26 <br />to 32.5 <br />3 <br />45 26 <br />14 <br />4 <br />45 26 <br />14 <br />6 <br />31 17 <br />10 <br />8 <br />24 13 <br />8 <br />10 <br />17 10 <br />6 <br />12 <br />13 8 <br />5 <br />14 <br />12 7 <br />4 <br />16 <br />11 6 <br />4 <br />18 <br />10 6 <br />4 <br />Pipe Diameter <br />*SDR=Standard Dimension <br />Ratio= <br />Min. Wall Thickness <br />• Verify that the pipe and tanks are not damaged by sharp rocks or excessive abrasion <br />when the pulled into place during fusion welding and installation operations. <br />5.2.2 Fusion Welding <br />• Before pipe fusion welding operations and installations verify that solid walled pipe, <br />perforated pipe, fittings, and flanged couplings comply with product requirements of the <br />technical specifications. <br />• Verify that certified fusion welding operators will be performing the welding. <br />• Verify that caution is taken to prevent water from coming in contact with the pipe and <br />heater plates during welding operations. A shelter may be required for the fusion <br />welding machine to allow operations to continue in adverse weather conditions. <br />• Verify that heater plate surface temperatures are maintained between 375°F and 400°F <br />for both coated plates and uncoated plates. Verify that operator checks heater plate <br />surface temperatures with pyrometer. <br />• Verify that inside and outside of pipe ends are cleaned to remove dirt, water, grease, and <br />other foreign material. <br />Page 50 0 <br />