Bore Lining: Inner Diameter 10-500 mm, Length 50-1000 mm

Component Specifications

Definition

A bore lining is a specialized refractory component designed as a sleeve or tip that lines the internal diameter of machine openings, nozzles, or channels. It serves as a protective barrier in high-temperature industrial applications, preventing thermal degradation, mechanical wear, and chemical attack on the underlying machine structure. Typically used in metal processing, glass manufacturing, and chemical reactors, it maintains dimensional stability and process efficiency under extreme conditions.

Working Principle

The bore lining operates by providing a sacrificial or durable layer between the process medium and the machine body. It absorbs thermal stress, resists abrasive wear from flowing materials, and prevents chemical reactions that could damage the equipment. Its refractory properties allow it to maintain integrity at temperatures exceeding 1000°C, while its precise geometry ensures consistent flow or alignment in the machine operation.

Materials

High-alumina ceramics (Al2O3 content 85-99%), silicon carbide (SiC), zirconia (ZrO2), fused silica, or advanced refractory composites. May include bonding agents like phosphate or clay binders. Operating temperature range: 1000-1800°C depending on material grade.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Length	50-1000 mm
Density	2.5-4.0 g/cm³
Inner Diameter	10-500 mm
Wall Thickness	5-50 mm
Pressure Rating	Up to 10 bar
Thermal Conductivity	2-30 W/m·K
Max Service Temperature	1600°C

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 5019, DIN 1089, ASTM C24

Parent Products

This component is used in the following industrial products

Refractory Sleeve or Tip

A refractory component at the end of a stopper rod that controls molten metal flow in continuous casting.

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Engineering Analysis

Risks & Mitigation

Thermal shock cracking
Erosion from abrasive flows
Chemical corrosion from molten materials
Installation misalignment causing leaks
Material degradation over time reducing protection

FMEA Triads

Trigger: Rapid temperature changes exceeding material thermal shock resistance
Failure: Cracking or spalling of lining
Mitigation: Use graded thermal expansion materials, implement controlled heating/cooling cycles, apply protective coatings

Trigger: High-velocity abrasive particle flow
Failure: Erosion and thinning of lining wall
Mitigation: Select harder materials like silicon carbide, design smoother internal surfaces, implement flow conditioning upstream

Trigger: Chemical reaction with process materials
Failure: Corrosion and loss of structural integrity
Mitigation: Choose chemically inert materials like high-alumina ceramics, monitor process chemistry, implement protective purge gases

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±0.5% on inner diameter, ±1% on length for precision applications; general applications ±2%

Test Method

ISO 5019 for dimensions, ASTM C20 for apparent porosity, ASTM C133 for crushing strength, thermal shock testing per ASTM C1171

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Bore Lining

Manufacturer profiles associated with Bore Lining.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Frequently Asked Questions

What industries commonly use bore linings?

Primary industries include steel and metal foundries (for ladles and tundishes), glass manufacturing (forehearths and feeders), chemical processing (reactor nozzles), and cement production (kiln inlets).

How often should bore linings be replaced?

Replacement intervals vary from weeks to years based on material, operating temperature, and abrasion exposure. High-wear applications may require monthly inspection, while stable processes can last 1-3 years.

Can bore linings be custom-shaped?

Yes, most are custom-manufactured to match specific machine geometries using precision molding, extrusion, or machining of refractory materials before firing.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Bore Lining