Expansion Loop Sizing: carbon_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) | notes | nps in (in) | od in (in) | od mm (mm) | offset leg ft (ft) | temp delta C (delta_C) | temp delta F (delta_F) | thermal expansion in per 100ft (in/100ft) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| carbon_steel | cs_10_dt200 | 1 | 0.00078 | 32 | 21.2 | 10.6 | NPS 10 Sch40; dT=200F | 10 | 10.75 | 273.1 | 53.1 | 111.1 | 200 | 1.56 |
| carbon_steel | cs_12_dt200 | 1 | 0.00078 | 35 | 23.2 | 11.6 | NPS 12 Sch40; dT=200F | 12 | 12.75 | 323.9 | 57.9 | 111.1 | 200 | 1.56 |
| carbon_steel | cs_2_dt100 | 1 | 0.00078 | 10 | 7 | 3.5 | NPS 2 Sch40; dT=100F (e.g. 70F to 170F); W=0.015*(dl_mm*OD_mm)^0.5; H=2W; offset=5W; anchor force F=A*E*alpha*dT | 2 | 2.375 | 60.3 | 17.5 | 55.6 | 100 | 0.78 |
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