INDUSTRY COMPONENT

Body/Tube

The main tubular structure of a Submerged Entry Nozzle that directs molten steel into the mold during continuous casting.

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Component Specifications

Definition
The Body/Tube is the primary cylindrical component of a Submerged Entry Nozzle (SEN) used in continuous casting of steel. It serves as the conduit through which molten steel flows from the tundish into the mold, submerged below the mold's meniscus to prevent oxidation and control flow dynamics. Its geometry and material properties are critical for maintaining steel quality, preventing nozzle clogging, and ensuring uniform solidification in the mold.
Working Principle
The Body/Tube operates by creating a sealed, refractory-lined channel that directs molten steel under controlled flow conditions. It utilizes the principle of submerged pouring to minimize turbulence, prevent air entrapment, and reduce reoxidation of the steel. The internal bore geometry (typically tapered or straight) controls flow velocity and distribution, while external features may include flanges for connection and ports for argon injection to prevent clogging.
Materials
High-alumina refractory materials (70-85% Al2O3), often with zirconia or graphite additives for thermal shock resistance and erosion protection. Common grades include fused silica-alumina composites or isostatically pressed alumina-graphite. Material must withstand temperatures up to 1600°C and resist chemical attack from molten steel and slag.
Technical Parameters
  • Length 600-1200 mm
  • Erosion Rate <1 mm per heat
  • Outer Diameter 80-200 mm
  • Wall Thickness 15-40 mm
  • Inner Bore Diameter 30-100 mm
  • Operating Temperature 1500-1600°C
  • Thermal Shock Resistance ≥20 cycles (water quench test)
Standards
ISO 10049, DIN 51060

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Body/Tube.

SEN tube submerged entry nozzle body continuous casting nozzle refractory tube steel casting component molten steel flow control Body/Tube Body/Tube in Basic Metal Manufacturing

Parent Products

This component is used in the following industrial products

Submerged Entry Nozzle (SEN)

A refractory component that directs molten steel from the tundish into the mold while submerged below the metal surface.

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Thermowells

Protective sheaths that house temperature sensors in jacketed systems

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Engineering Analysis

Risks & Mitigation
  • Thermal cracking from rapid temperature changes
  • Erosion from molten steel flow
  • Clogging from alumina buildup
  • Mechanical failure under thermal stress
FMEA Triads
Trigger: Thermal shock during preheating or casting start
Failure: Cracking or spalling of refractory lining
Mitigation: Controlled preheating procedures, use of thermal shock-resistant materials, proper storage to prevent moisture absorption
Trigger: High-velocity molten steel flow
Failure: Erosion of inner bore surface
Mitigation: Optimized bore geometry, erosion-resistant refractory materials, controlled casting speed
Trigger: Alumina inclusions in molten steel
Failure: Nozzle clogging and restricted flow
Mitigation: Argon injection through porous plugs, steel cleanliness control, optimized refractory composition

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
±1.5 mm on critical dimensions, ±0.5° on angular alignment
Test Method
Dimensional inspection per ISO 10049, thermal shock testing per DIN 51060, chemical analysis of refractory composition

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

Related Components

Refractory Liner
Refractory liner for molten metal flow control valves, providing thermal insulation and erosion resistance in extreme temperature applications.
Rotary Impeller
A high-speed rotating impeller used in molten metal degassing systems to inject inert gases and remove impurities.
Probe Assembly
High-temperature sampling probe for molten metal composition analysis in metallurgical processes
Level Sensor
Level sensor for continuous monitoring of molten metal height in industrial furnaces and casting systems.

Frequently Asked Questions

What is the primary function of the Body/Tube in a Submerged Entry Nozzle?

It serves as the main conduit that directs molten steel from the tundish into the mold while submerged below the steel surface to prevent oxidation and control flow patterns.

Why are refractory materials used for the Body/Tube?

Refractory materials withstand extreme temperatures (up to 1600°C), resist chemical erosion from molten steel, and provide thermal shock resistance during rapid temperature changes.

How does the Body/Tube affect steel quality?

Proper design prevents turbulence, minimizes inclusions, controls solidification patterns, and reduces nozzle clogging - all critical for producing high-quality steel with minimal defects.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

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.

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Binding Matrix Boron Element