Headers and Manifolds for Heat Transfer Systems

Product Specifications

Technical details and manufacturing context for Headers / Manifolds

Definition

Headers and manifolds are critical components within heat transfer assemblies that serve as distribution and collection points for working fluids. They connect multiple parallel tubes or channels to a single inlet or outlet, ensuring uniform flow distribution across the heat exchange surface. In heating systems, they collect heated fluid from the source and distribute it evenly to various zones or circuits, while in cooling systems, they gather fluid from different sections for return to the cooling unit. These components are typically manufactured from stainless steel, carbon steel, copper, or aluminum, with material selection based on the application's corrosion resistance, temperature, and pressure requirements. Common specifications include nominal diameters from DN15 to DN600 (ISO 6708), operating pressures from 1.0 to 1.6 MPa, and operating temperatures from -40°C to 120°C. Flow capacity ranges from 0.5 to 50 m³/h, and end connections can be flanged, threaded, or welded (ISO 7005). Material grades such as 304/316L stainless steel (ASTM A240) are often specified for corrosion resistance. Wall thickness varies from 2 to 12 mm (ISO 4200), surface roughness from 0.8 to 3.2 µm (ISO 4287), and pressure ratings from PN16 to PN40 (ISO 7268). Weight ranges from 5 to 500 kg depending on size and material. These values are typical reference ranges and must be verified for the specific model and application. Always confirm with the legal manufacturer or supplier that the selected header or manifold meets the required standards and performance criteria for your system.

Working Principle

Headers and manifolds operate on fluid dynamics principles to distribute or collect working fluids (typically water, steam, refrigerants, or thermal oils) across multiple parallel paths. They maintain pressure balance and flow uniformity through carefully designed internal geometries, ensuring each connected tube or channel receives the appropriate fluid volume for efficient heat transfer. The inlet header receives fluid from the source and divides it, while the outlet header collects fluid from multiple paths and combines it for return.

Common Materials

Stainless Steel, Carbon Steel, Copper, Aluminum

Technical Parameters

Parameter	Typical range	Notes & selection driver
Nominal Diameter	DN15–DN600 mm	Common range for headers/manifoldsISO 6708
Operating Temperature	-40–120 °C	Above 120°C may require special materials
Flow Capacity	0.5–50 m³/h	Depends on diameter and pressure drop
End Connection	DN15–DN600 mm	Flanged, threaded, or weldedISO 7005
Material Grade	304/316L	Stainless steel for corrosion resistanceASTM A240
Wall Thickness	2–12 mm	Thicker for higher pressureISO 4200
Surface Roughness	0.8–3.2 µm	Smoother for hygienic applicationsISO 4287
Pressure Rating	PN16–PN40 bar	Higher rating for high-pressure systemsISO 7268
Weight	5–500 kg	Depends on size and material

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Header Body Part
Main structural component that contains and directs fluid flow

Material: steel
Connection Ports Part
Threaded or welded openings for attaching tubes or pipes

Material: steel
End Caps Part
Sealed ends of the header to contain fluid pressure

Material: steel
Mounting Brackets Part
Attachment points for securing the header to the assembly

Material: steel

Applied To / Applications

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

Heat Transfer Assembly

View system integration details

Manufacturers of Headers / Manifolds

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Frequently Asked Questions

What materials are headers and manifolds typically made of?

Common materials include stainless steel, carbon steel, copper, and aluminum. The choice depends on factors like corrosion resistance, operating temperature, and pressure requirements. For example, stainless steel grades 304/316L are often used for corrosion resistance.

What are the typical pressure and temperature ranges?

Typical operating pressure ranges from 1.0 to 1.6 MPa, and operating temperature ranges from -40°C to 120°C. However, these are reference ranges; the actual limits depend on the specific design and materials. Always verify with the manufacturer.

How do I select the right size for my system?

Selection involves considering the nominal diameter (DN15–DN600), flow capacity (0.5–50 m³/h), and end connection type (flanged, threaded, or welded). These parameters must match your system's requirements. Consult the manufacturer for detailed sizing guidance.

What standards apply to headers and manifolds?

Relevant standards include ISO 6708 for nominal diameters, ISO 7005 for end connections, ASTM A240 for material grades, ISO 4200 for wall thickness, ISO 4287 for surface roughness, and ISO 7268 for pressure ratings. Compliance should be verified with the supplier.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 100 bar (standard), custom designs up to 300 bar
flow rate:	0.5 to 500 L/min per channel
temperature:	-40°C to +120°C
slurry concentration:	Up to 30% solids by weight (requires erosion-resistant materials)

Headers / Manifolds

Product Specifications

Applied To / Applications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards