SEPL-24 Fiber Stud Anchors — Ceramic Fiber Lining System

SEPL-24 Fiber Stud Anchors are the primary mechanical fixing used to secure ceramic fiber blanket and module linings against the inner face of furnace shells, fired heater walls, and process vessel casings. The anchor is a cylindrical stud — round in cross-section, dimensionally stable under repeated thermal cycling — that is stud-welded directly to the shell plate in a single arc discharge. No pre-drilling, no threading, no bolts. The result is a fast, consistent, high-density anchor array that holds multiple layers of ceramic fiber insulation firmly against the hot-face without the fibre sagging, peeling, or blowing off under operating draft and pressure fluctuations.

Each SEPL-24 stud is used in combination with a ceramic ferrule washer that clips onto the exposed stud tip after the fiber layers have been threaded on. The ceramic body of the ferrule breaks the thermal conduction path between the hot-face fiber and the metal stud, eliminating heat-bridging at the anchor point — a problem that causes localised hot spots on the outer shell and accelerates shell corrosion when left unaddressed.

• Part of Santura's complete Ceramic Fiber Lining Anchor system
• See also: SEPL-25 Threaded Studs for module installations
• Full refractory anchor range

Available Alloys & Grades

SEPL-24 Fiber Stud Anchors are drawn and machined from wire rod in the following alloys. Grade selection depends on furnace operating temperature, hot-face atmosphere (oxidising, reducing, carburising, sulphidising), and service life requirement.

Custom alloys including Alloy 601, Haynes 230, and other high-performance grades are available on request. Contact our technical team with your operating conditions for a grade recommendation.

How SEPL-24 Fiber Stud Anchors Work

The complete SEPL-24 ceramic fiber lining system operates in the following sequence:

1. Shell preparation: The furnace shell or steel casing is cleaned to bare metal in the anchor zones. A stud welding layout is marked based on the anchor pattern density required (typically 400–900 studs/m² depending on blanket weight and operating conditions).
2. Stud welding: Each SEPL-24 stud is loaded into a stud welding gun. The gun is positioned against the shell, fired, and the stud is welded in under one second via a drawn arc. The weld is full-penetration — the stud becomes an integral part of the shell, not a surface attachment. No special tooling or shell penetration is required.
3. Fiber impalement: Ceramic fiber blanket strips or pre-cut modules are pierced over the stud array, layer by layer, until the required insulation thickness is achieved. The stud holds the layers in alignment and prevents the blanket from sagging before the ferrule is fitted.
4. Ferrule fitting: A ceramic ferrule washer is pushed over the stud tip and seated against the outer face of the last fiber layer, locking everything in compression. The ceramic body insulates the metal stud from peak hot-face temperatures and acts as the mechanical retainer for the entire fiber stack.
5. Optional plastic cap: During transport and construction phases, a plastic cap can be fitted over each stud to protect personnel and the stud tip from damage before the fiber layers are installed.

Applications & Industries

Standard Specifications

• Stud diameter: 3 mm, 4 mm, 5 mm, 6 mm (custom diameters available)
• Stud length: 50 mm to 300 mm, in 25 mm increments (custom lengths to drawing)
• Head type: Flat disc head (standard) or headless plain pin (for clip-on ferrule systems)
• End form: Weld base (arc stud weld) or threaded base (bolt-on to pre-welded pad)
• Surface finish: Mill finish standard; pickled and passivated available on request
• Certification: EN 10204 3.1 material test certificates as standard; 3.2 available on request
• Packaging: Bulk carton or banded bundles; export packing available

Why Specify Santura SEPL-24 Fiber Stud Anchors

Santura Engineering has been manufacturing refractory anchors from Mumbai for over three decades. For SEPL-24 Fiber Stud Anchors specifically:

• Ready stock of SS304, SS310S, and Inconel wire rod — short lead times even on large volume orders
• Custom sizes machined to drawing — non-standard diameters, lengths, head geometries, and weld base configurations
• Complete system supply — SEPL-24 studs, ceramic ferrule washers, and stainless steel washers supplied together
• Exported to 25+ countries including UAE, Saudi Arabia, USA, Germany, Netherlands, South Korea, and Japan
• EN 10204 3.1 material test certificates provided as standard with every shipment
• Competitive pricing vs. European and North American suppliers — no reduction in alloy quality or dimensional tolerance

Related Products

SEPL-24 is part of Santura's complete ceramic fiber lining anchor system. For module-based ceramic fiber installations, see SEPL-25 Threaded Studs — corrugated and smooth shaft variants with knurled tips for improved module grip. For insulation materials including calcium silicate boards and rockwool blankets used in composite lining systems, see our insulation materials range.

For furnaces with castable or brick-lined sections adjacent to ceramic fiber zones, Santura supplies the full range of refractory anchors — V anchors, Y anchors, bullhorn anchors, brick staples, and shear connectors — all from one source. See also our chemical composition data and testing and certification pages.