Refractory Materials

Refractory Anchors

Materials SS · Alloy · Ceramic

Max Hot-End Per alloy — to 2,200°F+

Forms V · Y · U · J · Flat · Stud

Attachment Weld · Bolt · Stud

Custom Fab Available to drawing

What we supply

The mechanical backbone of every monolithic lining.

Correct anchor design, material selection, and spacing determine whether your lining stays in service or falls to the furnace floor. Too few anchors and the lining sags. The wrong alloy and the anchor burns away before the lining fails. We stock standard anchors and source custom configurations for any application.

V-Anchors

Most common form for castable linings. Bent wire or bar stock welded to shell or structural members. 10, 12, and 14 gauge; 304SS, 310SS, 330 alloy, and Inconel available.

Y-Anchors

Three-armed version for improved three-dimensional engagement in thick castable linings. Better resistance to thermal-cycling-induced displacement than two-armed forms.

U-Anchors & J-Bolts

For thinner castable sections and gun mixes. U-anchors provide surface engagement; J-bolts hook through castable for mechanical interlock.

Flat Bar & Hex Mesh

Flat bar zig-zag anchors and hexmesh systems for heavy-duty abrasion-resistant linings. Common in cyclones, transfer lines, and high-velocity gas systems.

Ceramic Fiber Module Anchors

Threaded stud or bayonet anchors for securing ceramic fiber modules to furnace shell. Stainless and alloy options. Insulating cups available to cap the hot end.

Ceramic Anchors & Standoffs

For applications above metallic anchor temperature limits. High-alumina ceramic standoffs eliminate hot-end thermal bridging and anchor oxidation in very high-temp zones.

Anchor failure is almost always at the weld

The anchor body rarely fails — the weld does. All anchors should be welded with stainless rod matched to the anchor alloy, and each weld should be visually inspected before casting. A missed weld on an overhead lining is an expensive problem to find during operation.

Product specifications

Alloy	Max Continuous Temp	Atmosphere Resistance	Best Applications
304 Stainless	1,500°F	Oxidizing	Lower-temp furnaces, boilers
310 Stainless	1,900°F	Oxidizing, mildly reducing	General industrial furnaces
330 Alloy (RA330)	2,100°F	Oxidizing, carburizing	Carburizing furnaces, radiant tubes
600 Alloy (Inconel)	2,000°F	Oxidizing, reducing, carburizing	Petrochemical, harsh atmospheres
601 Alloy	2,200°F	Oxidizing	Very high-temp metallic anchor limit
High-Alumina Ceramic	3,000°F+	All atmospheres	Above metallic anchor temperature range

Anchor spacing guidelines

Anchor density is driven by lining weight, thickness, and thermal loading. General guidelines for castable:

Lightweight castable (<75 PCF): 6"–8" on center overhead
Medium castable (75–115 PCF): 8"–10" on center
Dense castable (115+ PCF): 10"–12" with heavier gauge
Increase density at transitions, corners, and high-vibration areas
Overhead and curved surfaces require tighter spacing than vertical walls

Anchor length and hot-end cover

Embed the anchor 2/3 of lining depth, leaving 1/3 cover from the hot face. Wax-coat or foam the hot end before casting to create an expansion void.

Never allow anchors to reach the hot face — direct flame contact degrades alloys rapidly
Wax or foam tips create a void that accommodates anchor thermal expansion
Match weld rod to anchor alloy — do not use mild steel rod on SS anchors
Inspect every weld before casting — it's the one time you can fix it easily

Ready to move forward?

Refractory Anchors — sourced, specified, delivered.

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