IPE-EP-5-6-8

IPE Engineering Practice IPE-EP-5-6-8

Document number: IPE-EP-5-6-8 · Section: 5 — Piping

CoInafsletcatilo nA Prouinbta E nEgningeeirninege Prriancgtic Pesractices Steam Tracing 7.1.4 Tracing of the run pipe shall extend to the first block valve of any branch connection. 7.1.5 For service operations sensitive to cold spots (waxes, asphalts, sulfur, etc.), the tracers shall not leave the insulation at the same point in order to avoid having any pipe length totally untraced. 7.1.6 (*)Flanges, valve bonnets and packing glands shall be traced only when specified by the Owner’s Engineer. Valve tracing shall be in accordance with FIGURE 6FIGURE6. When such components are not traced, the run tracer shall be bent to follow the contour of the main pipe as is shown in FIGURE 5. 7.2 Tracer lines shall preferably be continuously sloped in the direction of flow. Pockets shall be avoided as much as possible. Low points shall have valved drains if the tracer is used intermittently. 7.3 Use bends in place of fittings wherever possible. 7.4 Tubing or pipe bends shall be made by using tube benders that will not kink, wrinkle, or flatten bends. Tubing or pipe that is kinked, wrinkled, or flattened shall be cut out and replaced. 7.5 Tracer lines, when fabricated from tubing, shall be grouped together when possible to permit insulating as a unit; for instance, supply lines from steam supply headers which are to be routed in the same direction. 7.6 Break joints in the tracer system shall be provided at equipment which must be removed for maintenance. Tracer fining break joints and all other mechanical joints shall be located outside of the equipment insulation. 7.7 No provision shall be made for expansion movement of tracers 1/2 inch outside diameter or less. For tracers larger than 1/2 inch outside diameter, a U–Type expansion bend shall be provided. The loop shall be positioned so it is self draining. Insulation shall be slotted where the expansion bend leaves the pipe. Where the line makes a turn, the tracer shall be anchored or banded to restrain expansion so that the insulation at the elbow will not be broken. Guide loops welded to the pipe shall be installed near flanges, valves and expansion loops where movement of tracer may damage the insulation. FIGURES 8 and FIGURE 9 show typical expansion loops for tracers. 7.8 Tracers shall be in contact with piping or equipment except where spacers are specified. 7.9 For conditions where the tracer could locally overheat lines containing acid, caustic, amine, or phenolic water, insulation spacer blocks shall be installed between the tracer and the pipe. Thickness and spacing of the spacer blocks shall be determined by process considerations and/or site specific requirements. 7.10 Typical valve tracing shall be per FIGURE 6. The specified number of tracer turns around the valve body shall be by means of diagonal tracing as shown. When this is impractical, the alternate method of valve body tracing shall be used and the tracer shall be secured to the valve by use of tie wires. 7.11 Typical control valve station tracing shall be in accordance with FIGURE 7. 7.12 (*)Unless otherwise specified by the Owner’s Engineer, steam tracers for under ground lines shall be as shown in FIGURE 7. 7.13 Each steam tracer shall be identified with a tag per Section 9.0 of this Practice.

CoInafsletcatilo nA Prouinbta E nEgningeeirninege Prriancgtic Pesractices Steam Tracing 3) At Trap Assembly where; EQUIP. ID = Traced Line, Instrument or Equipment EQUIP. ID UN = Unit Number UN - TR TR = Tracer Sequential For example: 50P - 200 28 - T1 4) The Steam Trap Assembly will use the same unit number and sequence number as the tracer shutoff valve number regardless of where the steam trap is located. 9.3 Refer to Steam Tracing Index shown in TABLE 6 for steam tracing circuit and items being traced. 9.4 Tags shall be stamped “Winterizing Only” if tracer is used solely for that purpose.

EQUIP. ID	where; EQUIP. ID = Traced Line, Instrument or Equipment UN = Unit Number TR = Tracer Sequential
UN - TR

50P - 200
28 - T1

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