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ENVIRONMENTAL HEALTH <br />DEPARTMENT <br />pipe. T.A.B. couplings can also accept either a tapered spigot <br />or T.A.B. spigot end of the pipe. Tapers can be made in the <br />field with tools designed for this purpose. Bells cannot be field <br />made. When a belled end is needed, a sleeve coupling is re- <br />quired. <br />LAYOUT AND PREPARATION <br />While handling, storing, and transporting the pipe, it some- <br />times incurs rough treatment. Inspect all pipe surfaces for <br />possible damage to the pipe wall and spigot ends. Damaged <br />pipe must be cut out and replaced. Inspect fittings for damage. <br />Impact damage on the pipe will appear as a light spot on the <br />surface. Spigot damage will appear as a crack or ragged edge <br />to the taper. Spigot damage can be remedied by cutting and <br />re -tapering. If in doubt about damage, do not use the pipe. <br />Exposing machined surfaces to direct sunlight prior to bond- <br />ing can result in loss of joint bonding strength. Because the <br />degree of weathering or surface degradation and subsequent <br />effect on bond strength varies greatly, it is difficult to place a <br />fixed time limit on the acceptable amount of exposure. In all <br />instances where protective coverings are removed from ma- <br />chined surfaces and ultraviolet exposure exceeds one day, <br />surfaces must be restored to factory -fresh condition. <br />Layout <br />Advance planning of the piping layout can reduce the quanti- <br />ties of material required and will make servicing the system <br />easier. Note: The scarfed containment pipe must be posi- <br />tioned over the product pipe before bonding the product pipe. <br />Installation Crew Size and Organization <br />Each installation is different and requirements change depend- <br />ing on whether the installation is simple (long, straight runs of <br />piping) or complex. Requirements are also affected by pipe <br />size, installation temperature, and site locations. <br />