Types of Refractory-lined Expansion Joints
Depending on the temperature, pressure, movement and flow media conditions, refractory-lined expansion joints can be hinged, in-line pressure balanced, gimbal, tied-universal and can also include pantographic linkage. For hot applications (up to 1400°F), the bellows is packed with Kaowool and lined with insulating refractory.
The refractory-lining allows for the use of carbon steel pipe instead of 300 series stainless steel. It can reduce the pipe wall temperature to between 300-450°F and also protect the bellows from abrasion caused by the flow of abrasive particles. Refractory-lined expansion joints are used in Fluid Catalytic Cracking Units (FCCU), furnaces, hot gas turbines, styrene plants, fluidized bed boilers, kilns, power recovery trains and thermal oxidizers.
Refractory-lined expansion joints are custom designed for each application due to the extreme environments. U.S. Bellows is an experienced manufacturer of refractory-lined expansion joints. View some of our recent projects:
(Far-Left) 30″ Spent Catalyst Standpipe Expansion Joint with Abrasion Resistant Refractory & Pantographic Linkage - Design temp: 1050°F, design pressure: 19 PSIG, linkage designed to distribute axial compression between the two bellows
(Middle) 63″ In-line Pressure Balanced Expansion Joint with Refractory-lining for a Clean Fuels Project - Design temp: 1200°F, design pressure: 15 PSIG, Inconel® 625 LCF bellows, A516 GR 70 carbon steel shell
(Far-Right) 48″ Expansion Joint with 4″ Thick Refractory-lining - Design temp: 1450°F, design pressure: 60 PSIG, Inconel® 625 LCF bellows, A516 GR 70 carbon steel weld ends, hinges and pantographic linkage
(Left) 80″ Tied Universal Expansion Joint with Refractory-lining and Inconel 625 LCF Bellows Packed with Kaowool - Design temp: 1450°F, design pressure: 58 PSIG, A516 GR 70 carbon steel tie rods and slotted hinges, 309 stainless steel liner seals
(Right) 55″ Universal Gimbal Expansion Joint with Refractory-lining and Slotted Hinges for a Refinery in Joliet - Design temp: 1020°F, design pressure: 60 PSIG, A516 GR 70 carbon steel pipe, Inconel® 625 LCF two-ply bellows and slotted hinge
(Left) Hinged Single and Universal Expansion Joints with Refractory-lining - 31″, 27″ and 25″ diameter, design temp: 1400°F, design pressure: 75.4 PSIG, Inconel® 625 LCF bellows, A516 GR 70 carbon steel pipe
(Right) Rectangular Metallic Expansion Joint with Refractory Lining and Cor-ten Flanges for a FCC Duct - 65″ x 81″ x 41-1/2″, design temp: 1400°F, design pressure: 5 PSIG, lined with both vibra cast and abrasion resistant refractory, 321 stainless steel bellows
(Left) 60″ Tied Universal Expansion Joints with Refractory-lining for a Carbon Monoxide Ducting System - Design pressure: 2 PSIG, lined with 3/4″ thick abrasion resistant refractory in hex mesh, A240 TP 304 SS bellows and flanges and A240 TP 310 SS pipe
(Right) 70″ Tied Universal Expansion Joint with 4″ Refractory-lining and Inconel 625 LCF Bellows for a FCC Unit - Design temp: 1400°F, design pressure: 51 PSIG, Inconel® 625 LCF bellows, A516 GR 70 carbon steel, weld ends and spool