Server Liquid Cooling Manifold

Differentiation: This Manifold vs Industry Conventional

Dimension	This product	Industry conventional	Differential value
Internal roughness	Ra ≤0.4 μm (polished, pickled, passivated)	Ra 1.6–3.2 μm typical	Cuts particle accumulation sites, extends coolant life
Weld quality control	ISO 3834-certified orbital welding, 100% leak tested	Manual TIG, sampled leak testing	Leak points per manifold reduced to zero field welds
Material verification	Chemical composition re-check per batch, ASTM A312 grade control	Mill certificate only	Batch-to-batch corrosion performance stays stable
Dimensional consistency	±0.1 mm OD, ±0.05 mm wall across batches	±0.3 mm OD typical	Rack connections seat on first assembly
Standard compliance	ASTM A312 + JIS G3459, CE/RoHS	Varies by supplier	Drop-in fit to international CDU interfaces
Custom geometry	10×10–80×80 mm, 0.5–3.0 mm wall, up to 6000 mm	Standard straight tube only	Eliminates adapter fittings in tight rack space

Manufacturing Process

• Raw material verification → ASTM A312 / JIS G3459 grade check → spectrometer composition analysis → 304 or 316L confirmed before forming
• Tube forming → dimensional control → precision tube forming equipment → OD and wall tolerance held to ±0.1 mm / ±0.05 mm
• Controlled welding → ISO 3834 orbital welding → automated welding system → consistent penetration and bead geometry across the run
• Internal surface treatment → polishing, pickling, passivation → surface line → Ra ≤0.4 μm verified by profilometer
• Leak and pressure testing → 100% inspection → pressure test bench → every unit tested before shipment

Internal surface quality matters more than most buyers assume. Under Ra ≤0.4 μm, the flow path stays smooth enough that particle accumulation drops and coolant circulation holds steady across years of operation - where conventional industrial tubing at Ra 1.6–3.2 μm gives contamination a place to settle.

Core Components

 

• Orbital-welded tube joints: automated orbital welding heads, ISO 3834 process control - chosen because manual weld inconsistency is the leading cause of manifold leakage in field data.
• 316L stainless steel body: molybdenum-bearing, low-carbon grade - chosen for pitting resistance in chloride and glycol-based coolant environments.
• Passivated internal surface: nitric/citric passivation line - chosen to remove free iron and restore the chromium oxide layer after machining.
• Integrated branch fittings: CNC-machined connection ports - chosen to eliminate field welding between manifold and rack drop lines.

Quality Inspection

• Incoming inspection → chemical composition + material certificate → spectrometer report per batch
• In-process inspection → dimensional measurement → OD/wall/length per drawing tolerance
• Weld inspection → visual + penetration check → ISO 3834 acceptance criteria
• Surface inspection → roughness measurement → Ra ≤0.4 μm sign-off
• 100% leak test → pressure hold → zero-leak acceptance before shipment

Defect rate held below 0.3% across production. Third-party verification available through SGS/TÜV/BV on request, with inspection reports issued per order.

Technical Specifications

 

Category	Parameter	Value	Standard
Dimensional	Square tube size	10×10 mm to 80×80 mm	Custom
Dimensional	Wall thickness	0.5–3.0 mm	Custom
Dimensional	Length	Up to 6000 mm	Custom
Material	Grade options	304 / 316L stainless steel	ASTM A312
Material	Form	Straight tube, bent tube, manifold assembly	JIS G3459
Surface	Internal roughness	Ra ≤ 0.4 μm	Profilometer verified
Surface	Treatment	Polishing, pickling, passivation	Internal spec
Surface	Cleanliness	Particle-controlled, clean packaging	Internal spec
Mechanical	Weld method	Orbital welding	ISO 3834
Mechanical	Leak integrity	100% pre-shipment tested	Pressure hold

Customization Capability

Custom dimension	Range / Options	Verification
Tube cross-section	10×10 mm to 80×80 mm square, round available	Dimensional inspection
Wall thickness	0.5–3.0 mm	±0.05 mm tolerance
Length	up to 6000 mm	Per drawing
Geometry	Custom bends, branch outlets, manifold assemblies	Drawing-based review
Connections	Customized port sizing and spacing	Fit check per drawing

Applications Across Cooling Systems

Industry	Typical application	Recommended spec	Operating environment
AI data centers	Rack-level coolant distribution from CDU	316L, Ra ≤0.4 μm, custom bends	Glycol coolant, continuous 24/7
Immersion cooling	Manifold feeding single-phase immersion tanks	304/316L, 80×80 mm	Dielectric fluid exposure
Energy storage cooling	Battery thermal management distribution	304, 10×10–40×40 mm	Glycol-water mix, vibration

The 316L option is the specified choice where coolant carries chloride or glycol; 304 covers pure-water and deionized-water loops at lower cost. Because the manifold can be formed to fit the rack envelope rather than the rack adapting to standard pipe, installers working inside tight rack clearances skip the adapter fittings entirely.

What Buyers Ask Before Committing

Q: How does the manifold ensure batch-to-batch consistency?

A: Every batch runs the same controlled process: spectrometer composition re-check on incoming material, dimensional control during forming, ISO 3834 orbital welding, and 100% leak testing before shipment. That process discipline keeps OD within ±0.1 mm and wall within ±0.05 mm from the prototype batch to volume production.

Q: What is the standard lead time?

A: Standard products ship in 7–15 working days. Customized manifold assemblies with non-standard bends or port layouts are quoted after drawing review, and urgent projects can see 30% faster delivery through production scheduling adjustment.

Q: What is the minimum order quantity?

A: MOQ depends on the configuration. Standard tube sizes start at small batch quantities, while custom manifold assemblies are quoted per project. Samples are available before mass production so you can verify dimensions and performance first.

Q: Can you supply 316L grade specifically for glycol coolant?

A: Yes. 316L with molybdenum content and low carbon delivers improved pitting resistance and long-term coolant compatibility compared to 304, and it is the recommended grade for glycol-based and chloride-bearing coolant environments. Material is verified per ASTM A312 with a composition report per batch.

Q: How is leakage controlled during production?

A: Welding uses orbital technology under ISO 3834 process control to hold consistent penetration and bead geometry, and every unit passes a pressure-hold leak test before shipment. There is no sampled testing - 100% of production is tested.

Q: What documentation comes with an order?

A: Each order includes material certificates with chemical composition reports, dimensional inspection records, surface roughness verification, and leak test results. Third-party inspection through SGS/TÜV/BV is available for buyers who need independent verification.

Q: How do you handle custom dimensions that must fit existing rack space?

A: Send your drawing or CAD file for a technical review covering tube dimensions, bend requirements, connection methods, and application conditions. Most projects start with a prototype or sample order so fit is confirmed before volume production begins.

Hot Tags: server liquid cooling manifold, China server liquid cooling manifold manufacturers, suppliers, factory, chemical cooling manifold, closed loop manifold system, heat transfer manifold, high tolerance smooth tube, low temperature manifold, machined cooling manifold