Aluminum Spun Enclosures for UHV Power Systems

Precision Metal Spinning | 5A02-H112 Aluminum GIS Assembly Components for Ultra-High Voltage Systems with Micron-Level Accuracy (GB/T 1804-m)

Attributes

Material5A02-H112 Aluminum-Magnesium Alloy
Thickness2mm
CoatingMirror-Grade Deburring
SizeØ517×H218
ApplicationGIS (Gas-Insulated Switchgear) Components for Ultra-High Voltage Systems
Forming ProcessShear Spinning + Power Spinning (Flow Forming)
Structure TypeOne-Piece Integrated Spun Assembly
Dimensional Tolerance±0.1 mm
Geometric ToleranceGB/T 1184-K
Linear Tolerance StandardGB/T 1804-m
Surface FinishMirror-Grade Deburring
Surface RoughnessRa ≤ 25 μm
CleanlinessChip-Free Internal Cavity

Core Process

Manufactured using a combination of shear spinning (thinning spinning) and power spinning (flow forming), these GIS components are designed for integrated multi-part forming.

This process consolidates traditionally welded multi-piece structures into a single-piece spun assembly, significantly reducing welding operations and minimizing the risk of assembly-induced distortion.

The result is improved structural integrity, enhanced dimensional stability, and higher reliability for gas-insulated switchgear (GIS) systems in ultra-high voltage applications.

Precision Control

Dimensional accuracy is controlled in strict accordance with:

GB/T 1804-m (linear tolerances)

GB/T 1184-K (geometric tolerances)

All critical mating surfaces undergo 100% inspection, with dimensional variation maintained within ±0.1 mm to ensure precise assembly fit and sealing performance.

Surface Treatment

A mirror-grade deburring and finishing process is applied to achieve high surface integrity:

General surface roughness: Ra ≤ 25 μm
All edges are fully deburring and radius-controlled (edge rounding)
Internal cavities are completely free of metal chips and contaminants

This level of cleanliness meets the strict requirements of high-voltage electrical equipment, preventing contamination and electric field concentration.

Material Adaptability

Specialized in 5A02-H112 aluminum-magnesium alloy, offering excellent corrosion resistance and mechanical stability.

Combined with precision metal spinning processes, this material ensures long-term durability and reliable performance under harsh outdoor conditions typical of ultra-high voltage transmission systems.

Technical Specifications

Parameter	Specification
Product Name	5A02-H112 Aluminum GIS Metal Spinning Assembly Components
Application	GIS (Gas-Insulated Switchgear) Components for Ultra-High Voltage Systems
Material	5A02-H112 Aluminum-Magnesium Alloy
Forming Process	Shear Spinning (Thinning Spinning) + Power Spinning (Flow Forming)
Structure Type	One-Piece Integrated Spun Assembly
Manufacturing Capability	Integrated Multi-Part Forming
Linear Tolerance Standard	GB/T 1804-m
Geometric Tolerance Standard	GB/T 1184-K
Dimensional Tolerance	±0.1 mm
Inspection Method	100% Inspection of Critical Mating Surfaces
Surface Finish	Mirror-Grade Deburring & Finishing
Surface Roughness	Ra ≤ 25 μm
Edge Treatment	Full Deburring & Radius-Controlled Edge Rounding
Internal Cleanliness	Chip-Free & Contaminant-Free Internal Cavity
Structural Advantages	Reduced Welding Operations / Minimized Assembly Distortion
Electrical Performance Advantage	Reduced Risk of Electric Field Concentration
Key Material Characteristics	Corrosion Resistance / Mechanical Stability / Outdoor Durability
Reliability Features	Enhanced Structural Integrity & Sealing Performance
Typical Application	Ultra-High Voltage GIS Transmission Equipment