Expansion Loop Sizing: stainless steel
Pipe thermal expansion loop sizing — U-bend loop width, height, and offset leg dimensions by pipe material, NPS, and temperature differential. Based on Engineering ToolBox formula W=0.015*(dl_mm*OD_mm)^0.5 per ASME B31.3 Appendix D flexibility principles and Kellogg/Spielvogel methods. Covers carbon steel (NPS 2–12, dT 100–300°F), stainless steel 304/316 (NPS 2–8, dT 100–300°F), and copper (NPS 2–4, dT 50–100°F). Also includes L-bend offset leg records for carbon steel. Thermal expansion per ASME B31.3 Appendix C.
| pipe material | record id | anchor force multiplier (dimensionless) | cte in per 100ft per deltaT (in/100ft/F) | guide spacing from loop ft (ft) | loop height ft (ft) | loop width ft (ft) | nps in (in) | od in (in) | od mm (mm) | offset leg ft (ft) | standard | temp delta C (delta_C) | temp delta F (delta_F) | thermal expansion in per 100ft (in/100ft) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| stainless steel | ss 8 dt300 | 1.3 | 0.00104 | 40 | 27 | 13.5 | 8 | 8.625 | 219.1 | 67.4 | ASME B31.3 Appendix C; MSS SP-69 | 166.7 | 300 | 3.12 |
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