Insulation for pipes or vessels with low temperature material, usually below freezing.
PT&P designed cryogenic trunnion supports for ethylene loss recovery lines at a plant in Texas. The trunnions were fabricated from 2″ dia. stainless steel pipes and have a maximum height of 3′. They include 6″ x 6″ permali® blocks measuring 2″ thick each. The permali® block isolator is a laminated phenolic material from layers of wood impregnated under vacuum and heat with synthetic resin. The temperature range for these supports is from ambient to -300°F.
The operating temperature for these cryogenic shoes ranges from -290°F to 90°F. They are designed for 56″ diameter pipe and are capable of supporting loads up to 40,000 lb. The insulation is multi-layered comprised of 20 PCF polyurethane, a vapor barrier, an aluminum metal jacket, and acoustic pads. The acoustic pads are installed around the cold shoe to absorb vibration. The base and bearing plates are fabricated from carbon steel.