Support Legs/Skirt: Load Capacity 5-50 tons per leg

Component Specifications

Definition

Support legs and skirt components are engineered structural elements designed to provide vertical support, stability, and peripheral protection for feedwater tanks within storage sections of industrial systems. These components ensure proper weight distribution, prevent tank deformation, protect against external impacts, and maintain alignment with connected piping and equipment. They are critical for operational safety, vibration dampening, and thermal expansion management in high-pressure and high-temperature applications.

Working Principle

Support legs transfer the tank's weight and operational loads to the foundation through vertical compression, while the skirt provides lateral stability and protects the tank base from environmental and mechanical damage. The design incorporates load distribution principles, material strength calculations, and thermal expansion allowances to maintain structural integrity under varying operational conditions.

Materials

Carbon steel (ASTM A36/A283), stainless steel (304/316L), or alloy steel with corrosion-resistant coatings; typical thickness: 6-20mm for legs, 3-10mm for skirt; weld quality per AWS D1.1.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Bolt Holes	4-8 M16-M24 per leg
Skirt Height	200-800mm
Load Capacity	5-50 tons per leg
Surface Finish	Hot-dip galvanized or epoxy coated
Base Plate Size	300x300mm to 600x600mm
Height Adjustment	±50mm

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 9001, DIN 18800, ASME BPVC Section VIII

Parent Products

This component is used in the following industrial products

Storage Section / Feedwater Tank

The storage section of a deaerator that holds treated feedwater before distribution to boilers.

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Water Collection Sump

A basin at the base of a quench tower designed to collect and temporarily hold water after it has passed through the tower's packing or spray system.

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Engineering Analysis

Risks & Mitigation

Structural failure due to overloading
Corrosion in humid environments
Misalignment causing pipe stress
Vibration-induced fatigue cracks

FMEA Triads

Trigger: Inadequate material thickness or poor weld quality
Failure: Leg buckling or skirt deformation under operational loads
Mitigation: Regular ultrasonic thickness testing and weld inspection per AWS standards

Trigger: Corrosion from chemical exposure or moisture
Failure: Reduced load capacity and potential collapse
Mitigation: Apply protective coatings and implement cathodic protection systems

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

±2mm for vertical alignment, ±5mm for base plate positioning

Test Method

Load testing per ISO 7500-1, non-destructive testing per ASME V, dimensional verification per ISO 2768-m

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 Support Legs/Skirt

Manufacturer profiles associated with Support Legs/Skirt.

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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 is the primary function of support legs and skirt on a feedwater tank?

The support legs provide vertical load-bearing capacity to transfer tank weight to the foundation, while the skirt offers lateral stability, protects against impacts, and prevents debris accumulation under the tank.

How are support legs designed to handle thermal expansion?

Support legs incorporate sliding plates, expansion joints, or flexible connections that allow controlled movement during thermal cycling while maintaining structural stability and preventing stress concentrations.

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.

Support Legs/Skirt