Outer Cylinder Tube: OD_range 25-200 mm, wall_thickness 2-12 mm

Component Specifications

Definition

The outer cylinder tube is a precision-engineered cylindrical component that serves as the main pressure vessel in gas lift cylinder assemblies. It provides structural integrity, contains the piston rod and internal seals, and withstands both static and dynamic loads during compression and extension cycles. This component ensures proper alignment of internal parts while maintaining pressure integrity throughout the service life.

Working Principle

The outer cylinder tube functions as a pressure containment vessel that houses the piston assembly and hydraulic fluid or gas. During operation, it maintains structural stability while internal pressure changes cause the piston rod to extend or retract. The tube's dimensional accuracy ensures proper seal engagement and prevents leakage while withstanding bending moments and axial loads.

Materials

Typically manufactured from cold-drawn seamless steel tubing (ASTM A519), aluminum alloys (6061-T6), or stainless steel (304/316). Common specifications include: yield strength 250-550 MPa, hardness 80-95 HRB, surface finish Ra 0.4-0.8 μm.

Technical Parameters

Parameter	Typical range	Notes & selection driver
OD Range	25-200 mm
Wall Thickness	2-12 mm
Pressure Rating	10-30 MPa
Length Tolerance	±0.5 mm
Surface Roughness	Ra 0.4-0.8 μm
Straightness Tolerance	0.1 mm/m

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 6020-2, DIN 24334, ISO 3320, DIN 2391

Parent Products

This component is used in the following industrial products

Gas Lift Cylinder

A gas lift cylinder is a key component in ergonomic office chairs that enables smooth, controlled vertical adjustment of the seat height.

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Engineering Analysis

Risks & Mitigation

Internal corrosion leading to pressure failure
Dimensional wear causing seal leakage
Fatigue cracking at mounting points
Material defects in seamless tubing

FMEA Triads

Trigger: Inadequate surface finish or dimensional accuracy
Failure: Premature seal wear and hydraulic fluid leakage
Mitigation: Implement statistical process control for honing operations and 100% dimensional inspection

Trigger: Material impurities in seamless tubing
Failure: Catastrophic pressure vessel failure during operation
Mitigation: Ultrasonic testing of raw material and hydrostatic testing of finished tubes

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

ISO 2768-mK for general dimensions, ISO 286-2 for hole basis fits (H8 recommended)

Test Method

Hydrostatic pressure testing per ISO 10763, dimensional verification per ISO 1101, surface roughness per ISO 4287

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

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Manufacturers of Outer Cylinder Tube

Manufacturer profiles associated with Outer Cylinder Tube.

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Frequently Asked Questions

What are the most critical tolerances for outer cylinder tubes?

Internal diameter tolerance (±0.025 mm), straightness (0.1 mm/m), and surface finish (Ra 0.4-0.8 μm) are most critical for proper seal function and longevity.

Can aluminum outer tubes replace steel in gas lift applications?

Yes, aluminum alloys (6061-T6) are suitable for lighter duty applications but require thicker walls to achieve equivalent pressure ratings to steel tubes.

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.

Outer Cylinder Tube