Headers: Temperature Range -40°C to 200°C

Component Specifications

Definition

Headers are critical components in heating and cooling coil assemblies that serve as fluid distribution manifolds. They connect to the main supply and return lines, then branch out to multiple parallel tubes within the coil. Headers ensure uniform flow distribution across all tubes, preventing maldistribution that could reduce heat transfer efficiency. They are typically cylindrical or rectangular chambers with multiple outlet ports precisely aligned with coil tube ends.

Working Principle

Headers operate on fluid distribution principles where pressurized fluid enters through a single inlet, then divides evenly into multiple parallel flow paths through outlet ports. The header's internal geometry and port sizing create balanced pressure drops to ensure equal flow distribution to all coil tubes. This uniform distribution maximizes heat transfer surface utilization and prevents localized hot/cold spots.

Materials

Carbon steel (ASTM A106/A53), Stainless steel (304/316L), Copper alloys (C12200), Aluminum alloys (6061-T6). Material selection depends on fluid type, temperature, pressure, and corrosion requirements.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Surface Finish	Ra 3.2 μm minimum for smooth flow
Wall Thickness	Schedule 40-80 depending on pressure requirements
Connection Type	Flanged, Threaded, Welded
Pressure Rating	150-300 PSI standard, up to 600 PSI for high-pressure applications
Temperature Range	-40°C to 200°C
Port Configuration	2-20 outlet ports depending on coil size

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, ASME B31.1, ASTM A234, DIN EN 10216

Parent Products

This component is used in the following industrial products

Heating/Cooling Coils

Heat exchange components within Air Handling Units that transfer thermal energy to or from air streams

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Engineering Analysis

Risks & Mitigation

Corrosion leading to leaks
Flow maldistribution reducing efficiency
Thermal stress cracking
Erosion at inlet zones
Vibration-induced fatigue

FMEA Triads

Trigger: Corrosive fluid attack
Failure: Wall thinning and leakage
Mitigation: Use corrosion-resistant materials (stainless steel), apply protective coatings, implement regular thickness testing

Trigger: Uneven port sizing or alignment
Failure: Flow maldistribution and reduced heat transfer
Mitigation: Precision machining of ports, flow testing during manufacturing, proper installation alignment

Trigger: Thermal cycling stress
Failure: Fatigue cracking at welds and connections
Mitigation: Design with expansion joints, use stress-relieved welds, control temperature gradients during operation

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Port alignment ±0.5mm, Diameter tolerance ±0.1mm, Flatness 0.2mm per 300mm

Test Method

Hydrostatic pressure test at 1.5x design pressure, flow distribution test using tracer methods, dye penetrant testing for welds

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

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Headers

Manufacturer profiles associated with Headers.

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Frequently Asked Questions

What is the main function of headers in heating/cooling coils?

Headers distribute fluid evenly to multiple parallel tubes in the coil, ensuring uniform heat transfer and preventing flow maldistribution that reduces efficiency.

How do I select the right header material for my application?

Consider fluid compatibility (corrosion resistance), operating temperature/pressure, and environmental conditions. Common choices: stainless steel for corrosive fluids, carbon steel for water systems, copper for refrigeration.

What causes header failure in industrial applications?

Common failures include corrosion (especially at welds), erosion from high-velocity fluids, thermal stress cracking, and fatigue from pressure cycling.

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.

Headers