Section 5 — Piping

IPE-EP-5-3-19

IPE Engineering Practice IPE-EP-5-3-19

Document number: IPE-EP-5-3-19 · Section: 5 — Piping

CoInafsletcatilo nA Prouinbta E nEgningeeirninege Prriancgtic Pesractices FCCU Slide Valves 10.6.2.2 A recorder shall be used to monitor the temperature throughout the entire test. If the recorder is not operational, the test shall be halted until it can be repaired or replaced. The following temperature locations shall be monitored: 1) Gas temperature 12 inches upstream of the orifice 2) Gas temperature 12 inches upstream of the gas outlet from the valve 3) Shell temperature where the cone attaches to the body 4) Cone 6 inches upstream of the mounting flange 5) Dissimilar metal weld 6) Cone at the mounting flange 7) Orifice plate NOTE: Thermocouples at monitoring points “3” through “7” shall be on the same radial plane. Thermocouples at monitoring points “4” through “7” shall be installed prior to the refractory installation. These small holes shall be plugged at the end of the test. 10.6.2.3 Since the valves will be operating without lubrication, no lubricant shall be used between the disc and guides. 10.6.2.4 There shall be a hold point in the heat–up part of the test approximately half way to the design operating temperature. The valve shall be stroked at this point and may be rejected if problems occur. 10.6.2.5 At operating temperature, the valve shall be held for 4 hours and stroked ten times each hour. The strokes shall be distributed equally throughout each hour to achieve the maximum time interval between cycles. 10.6.2.6 Before initially stroking the valve at both the midway hold temperature and the final test temperature, all the thermocouple temperatures shall stabilize on the temperature chart for at least 15 minutes. The inlet and outlet temperatures shall not differ by more than 50°F. 10.6.2.7 The valve shall meet the following criteria for acceptance: 8) There shall be no binding or chattering sounds. 9) The actuator shall be adjusted so the valve operates with only the minimum force needed to break the static friction. 10) There shall be no indications of binding or chattering in the movement of the shaft. 11) After cool–down, the valve shall be reinspected. 12) There shall be no signs of galling or other damage to the running surfaces and overlaid surfaces. 13) There shall be no signs of contact with surfaces that are supposed to be separated. 14) The refractory shall meet the requirements of EP 11–1–1. 10.6.2.8 (*)If the valve does not pass the hot stroke, it shall be retested at the Inspector’s discretion. Any retesting required shall be at the vendor’s expense.

CoInafsletcatilo nA Prouinbta E nEgningeeirninege Prriancgtic Pesractices FCCU Slide Valves 24) (*)Specify if the orifice is lined with erosion resistant refractory or hard surfaced, see Paragraph 7.2.8. 25) (*)Specify if the disc edge is other than straight, see Paragraph 8.6.14. 26) (*)Specify the minimum flow area for double disc slide valves, see Paragraph 8.6.3. 27) (*)Specify if the disc and orifice is lined with erosion resistant refractory or hard surfaced, see Paragraphs 8.6.9 and 7.2.8. 28) Specify the internal material of construction. If a different grade of stainless steel is required, so specify (e.g. “Use Type 347H”), see Paragraph 7.1. 29) Specify the body and bonnet material of construction, see Paragraph 7.1. 30) (*)Specify the minimum thickness and type of insulating refractory for a cold wall slide valve. This would normally be the refractory thickness in the adjoining pipe. Specify if a dual layer lining with a hex–mesh is required in areas subject to erosion. 31) (*)Specify the thickness (1 or 3/4 inch) and type of refractory in a hexmesh erosion resistant lining and type of hexmesh installation (e.g. 3/4 inch, 1 inch raised bar). 32) (*)Specify the refractory ID of the adjoining pipe. 33) For the upstream end, specify: flange size, face, and class for flanged end; pipe outer diameter and thickness or NPS and schedule for weld–end. 34) Specify the downstream end the same as line 32. 35) (*)Specify whether or not a lip seal is required, see Paragraph 8.3.3. 36) (*)Specify “Per Paragraph 8.9.7” or specify differences if a different purge arrangement is required, see Paragraph 8.9.7. 37) (*)Specify flange class for auxiliary connections into the valve body, see Paragraph 8.9.2. 38) (*)Specify if there are geometry limitations to the valve (e.g. for replacement valves) such as length and/or diameter. Attach a sketch if necessary, see Paragraph 8.2.2. 39) (*)Specify if a Finite Element Analysis is required, see Paragraph 6.2.2. 40) (*)Specify the loads acting on the upstream end of the valve. Check if this is an estimated load that will be revised based on actual valve dimensions. 41) (*)Optionally, also specify loads acting on the downstream end of the valve, in the same manner the loads on the upstream end are specified. 42) (*)Provide any other pertinent information.

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