IPE-EP-5-10-2

IPE Engineering Practice IPE-EP-5-10-2

Document number: IPE-EP-5-10-2 · Section: 5 — Piping

CoInafsletcatilo nA Prouinbta E nEgningeeirninege Prriancgtic Pesractices Supplemental Requirements for Piping in HF Service (UOP-Trainer) 4.8 All socket welds in Pipe Classes HF–2, 4, & 5 (see Table 1 for EP 5–2–3 equivalent) shall be liquid penetrant inspected per ASME B31.3 Paragraph 344.4. 4.9 100% RT is required for all welds in Class HF–1 and HF–2 (see Table 1 for EP 5–2–3 equivalent). 4.10 Vent and drain attachments shall be installed per Figure 3A and Figure 3B. 4.11 Tangential drains on all HF–1, 2, 4, 5 (see Table 1 for EP 5–2–3 equivalent) shall be NPS 1, minimum size of run pipe is NPS 3 to install a tangential drain per Figure 3. 4.12 To avoid liquid traps, all reducers in horizontal runs shall be eccentric and oriented with the flat side down. 4.13 The use of piping unions is prohibited in HF process service. 4.14 In process service HF 2, 4 & 5, piping NPS 2 and larger shall be butt welded, piping smaller than NPS 2 shall be socket welded. All butt welds 2 inches and below shall be welded with a tig root pass, and tig weld out. 4.15 Gap–o–lets shall be used on all socket welds. 4.16 All external studs and bolting used on the HF unit shall be ASTM A193 B7M with ASTM A194 2HM nuts, see EP 5–2–2. 4.17 The Carbon Equivalent (CE) for all carbon steel material (pipe, valves, fittings, and forgings) shall be less than .43%, where CE is defined as follows, see EP 10–2–1. In addition, Cb + V shall not exceed 0.1 percent. Mn Cr+Mo+V Cu+Ni CE=C + + + 6 5 15 where: C = weight percent Carbon Mn = weight percent Manganese Cr = weight percent Chromium Mo = weight percent Molybdenum V = weight percent Vanadium Cu = weight percent Copper Ni = weight percent Nickel Cb = weight percent Columbium 4.18 100% PT and RT is required for all tangential drains. 4.19 Pneumatic pressure tests as outlined in EP 5–5–7 and ASME B31.3 shall be used in lieu of hydrotesting for existing equipment and piping. 4.20 All piping shall be designed in accordance with EP 5–1–2, UOP HF Acid Specification, and the additional requirements of this Practice. 4.21 The selection and design of flanges, gaskets, and bolting shall be per EP 5–2–2, UOP HF Specification and the additional requirements of this Practice. 4.22 All HF piping shall be inspected, tested, and fabricated in accordance with EP 5–5–1, UOP HF Specification and the additional requirements of this Practice.

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