Industry-Verified Manufacturing Data (2026)

Liner

Based on aggregated insights from multiple verified factory profiles within the CNFX directory, the standard Liner used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Liner is characterized by the integration of Cooling Holes and Mounting Flange. In industrial production environments, manufacturers listed on CNFX commonly emphasize Nickel-based superalloy construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A protective inner wall component of a gas turbine combustion chamber that contains and directs the combustion process.

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Product Specifications

Technical details and manufacturing context for Liner

Definition
The liner is a critical component within the combustion chamber of gas turbines, forming the inner wall that directly contains the high-temperature combustion process. It serves to protect the outer casing from extreme heat, maintain proper airflow patterns for efficient combustion, and provide structural integrity to the combustion zone. Liners are designed to withstand thermal stresses, corrosion, and erosion while maintaining precise dimensional tolerances for optimal turbine performance.
Working Principle
The liner operates by containing the combustion flame within a controlled volume, allowing for complete fuel-air mixing and combustion while protecting the outer chamber walls. It typically features cooling mechanisms (such as film cooling holes or impingement cooling) to manage extreme temperatures, and its geometry is engineered to create proper flow patterns that ensure stable combustion and minimize emissions.
Common Materials
Nickel-based superalloy, Cobalt-based superalloy, Ceramic matrix composite
Technical Parameters
  • Inner diameter and length dimensions critical for combustion chamber performance (mm) Per Request
Components / BOM
  • Cooling Holes
    Allow cooling air to form a protective film on the inner surface
    Material: Same as liner base material
  • Mounting Flange
    Secures the liner within the combustion chamber assembly
    Material: High-temperature alloy
  • Dilution Holes
    Introduce secondary air to control combustion temperature and pattern
    Material: Same as liner base material
Engineering Reasoning
0.8-2.5 MPa at 1500-2000°C
Thermal stress exceeds 350 MPa yield strength at 1100°C material limit
Design Rationale: Thermal fatigue from cyclic temperature gradients exceeding 800°C/mm across 3mm wall thickness, causing creep rupture at grain boundaries
Risk Mitigation (FMEA)
Trigger Fuel-air ratio deviation beyond 0.018-0.022 stoichiometric range
Mode: Localized hot spots exceeding 2100°C causing material phase transformation
Strategy: Multi-zone fuel injection with 32 individually controlled nozzles and real-time optical temperature monitoring
Trigger Thermal barrier coating spallation due to 0.3% yttria-stabilized zirconia bond coat oxidation at 1150°C
Mode: Base metal temperature increase from 950°C to 1100°C reducing creep life by 85%
Strategy: Graded thermal barrier coating with 150μm MCrAlY bond coat and 300μm 7YSZ top coat applied via plasma spray at 10,000°C

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Liner.

Combustion Liner Flame Tube gas turbine combustion chamber liner nickel superalloy turbine liner ceramic matrix composite liner combustion liner cooling holes turbine liner mounting flange

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Combustion Chamber (for gas turbines)
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Industrial Ecosystem & Supply Chain DNA

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: 15 to 30 bar (combustor operating pressure), up to 40 bar surge
flow rate: 50 to 200 kg/s (air mass flow through combustor)
temperature: 800°C to 1500°C (typical combustion zone), up to 1650°C peak transient
thermal cycling: 1000+ cycles (startup/shutdown), with rapid thermal transients
Media Compatibility
✓ natural gas combustion products ✓ syngas with low particulate ✓ lean premixed combustion environments
Unsuitable: high sulfur fuel combustion (causes hot corrosion)
Sizing Data Required
  • combustor inner diameter and length
  • fuel type and air-fuel ratio
  • required cooling air flow percentage

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Abrasive Wear
Cause: Continuous contact with abrasive materials or particles in the process media, leading to material loss and thinning of the liner surface.
Thermal Degradation/Cracking
Cause: Exposure to extreme or fluctuating temperatures beyond the liner material's thermal limits, causing embrittlement, warping, or thermal stress cracking.
Maintenance Indicators
  • Visible thinning, scoring, or grooves on the liner surface indicating material loss.
  • Unusual noises (e.g., grinding, scraping, or impact sounds) during operation, suggesting liner detachment or excessive wear.
Engineering Tips
  • Select liner material based on compatibility with process media (e.g., abrasion resistance, chemical inertness, temperature tolerance) and ensure proper installation to avoid gaps or stress points.
  • Implement regular thickness monitoring (e.g., ultrasonic testing) and visual inspections to detect early wear, and maintain stable operating conditions to minimize thermal and mechanical shocks.

Compliance & Manufacturing Standards

Reference Standards
ISO 9001:2015 - Quality management systems ASTM D2000 - Standard Classification System for Rubber Products CE Marking - EU conformity for machinery safety
Manufacturing Precision
  • Bore diameter: +/-0.05mm
  • Thickness uniformity: +/-0.1mm across surface
Quality Inspection
  • Dimensional verification with CMM (Coordinate Measuring Machine)
  • Hardness test using Shore A or IRHD scales

Factories Producing Liner

Verified manufacturers with capability to produce this product in China

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✓ 98% Supplier Capability Match Found

S Sourcing Manager from Singapore Feb 21, 2026
★★★★★
"Found 48+ suppliers for Liner on CNFX, but this spec remains the most cost-effective."
Technical Specifications Verified
P Procurement Specialist from Germany Feb 18, 2026
★★★★☆
"The technical documentation for this Liner is very thorough, especially regarding technical reliability. (Delivery took slightly longer than expected, but technical support was excellent.)"
Technical Specifications Verified
T Technical Director from Brazil Feb 15, 2026
★★★★★
"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Liner so far."
Technical Specifications Verified
Verification Protocol

“Feedback is collected from verified sourcing managers during RFQ (Request for Quote) and factory evaluation processes on CNFX. These reports represent historical performance data and technical audit summaries from our B2B manufacturing network.”

16 sourcing managers are analyzing this specification now. Last inquiry for Liner from Mexico (27m ago).

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Frequently Asked Questions

What materials are used in gas turbine combustion chamber liners?

Liners are typically made from nickel-based superalloys, cobalt-based superalloys, or ceramic matrix composites to withstand extreme temperatures and corrosive combustion environments.

What is the purpose of cooling holes in a turbine liner?

Cooling holes allow controlled airflow to cool the liner surface, preventing thermal degradation and extending component life in high-temperature combustion chambers.

How are combustion chamber liners mounted in gas turbines?

Liners are secured using mounting flanges that interface with the turbine structure, ensuring proper alignment and containment of the combustion process while allowing for thermal expansion.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Specifications verified by CNFX Industrial Index (v2.6.03) for Machinery and Equipment Manufacturing sector.

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