Data Center Cooling FAQs

• Central Coolant Distribution Units (CDUs) — commonly built in the 8-10 MW range per system, 2M per module (N+1), but CSI can engineer smaller or significantly larger systems when required.
• Rack-level, in-row manifolds, and supply/return headers tailored to site density and layout.
• Custom fabrication of CDU sub-assemblies, piping networks, welded headers, and stainless assemblies to project specifications.  
• Options for standardized designs (fast delivery) or engineered-to-order (ETO) systems for unique site constraints. 

• Orbital-quality welds performed by AWS-certified craftsmen.
• Welded manifolds with pulled ports — fewer joints than stacked tees.
• Hydrostatic and pneumatic testing before shipment for every system or assembly.
• Guidance on gasket replacement intervals and clamp torque to minimize field-related leaks.
• Custom approaches available for sites with higher-than-normal pressure, temperature, or vibration requirements. 
• Welded connections used where possible; flanged or tri-clamp connections used for service access.

• Straightforward designs for reliability and ease of service — not over-engineered.
• Built-in multi-stage filtration (25 µm inline; 1 µm side-stream).
• Heat exchangers sized for low ΔP, reducing pump horsepower and energy use across fleets.
• Redundant pumps, dual power feeds, and UPS-backed controls for resilience.
• Configurable for smaller, larger, or modular systems, depending on facility requirements. 

• ASME B31.3 for piping design and fabrication.
• ASTM A270 for tubing quality.
• AWS-certified welders for all projects.
• Project-specific QC plans, inspection records, and factory acceptance tests (FATs).
• Adaptable compliance with additional customer or hyperscale standards when specified. 

• 304 stainless steel is standard for glycol/water loops — balancing cost and corrosion resistance.
• 316 stainless steel where higher corrosion resistance or chemical compatibility is required.
• Other alloys and finishes available if project conditions demand.
• Custom material selections aligned to fluid chemistry, pressure, and lifecycle cost priorities. 

• Distribution centers positioned in Missouri, North Carolina, Texas, and California to support fast logistics.
• Over 100 craftsmen and 40+ engineers for high-volume or complex projects.
• Experience delivering single-engineered skids, replicated OEM programs, and large-scale multi-MW deployments.
• Lead time depends on scope and long-lead materials — we align early to protect schedules and can scale resources as needed. 

• BIM coordination via Autodesk Construction Cloud for clash-free installs.
• 30/60/90 design reviews plus detailed as-builts at turnover.
• FAT and prefab testing reduce site installation hours.
• Custom integration strategies developed for retrofits, greenfield builds, or modular programs. 

• Yes — CSI designs manifolds, skids, and assemblies for D2C/DLC and immersion applications.
• Modular skid architectures that scale linearly with AI/HPC density growth.
• Heat exchangers sized conservatively for pump efficiency and energy savings.
• Flexible system designs allow hybrid approaches or future expansion without redesign. 

• Inspection records, dimensional checks, and weld certifications.
• Hydrostatic and pneumatic leak testing.
• FAT reports; customer-witnessed FATs available for any build size.
• O&M manuals, recommended spares, and training materials at handover.
• Additional reporting or documentation provided for high-volume OEM or hyperscale customers upon request. 

• CSI provides startup and commissioning support for systems and assemblies.
• Training and recommended spares packages to support long-term up time.
• Dedicated project and account managers remain engaged for troubleshooting and lifecycle support.
• Service and support scale with project size — from single CDU startups to multi-campus deployments. 

• In-house polishing, passivation, ultrasonic cleaning, and leak testing (hydro & pneumatic).
• Broad machining and fabrication capacity to handle both one-off engineered builds and repetitive, high-volume OEM programs.  
• Automation and precision tools ensure repeatability and consistency at scale. 

• Decades in hygienic industries (food, dairy, beverage, pharma) where failure is not an option.
• Practices like smoother welds, polished surfaces, and leak-tight assemblies reduce fouling, biofilm, and chemical use.
• Proven ability to adapt sanitary design discipline into mission-critical data center cooling.
• Cleaner systems, longer heat exchanger life, and more reliable uptime in HPC and AI environments.

• ASME B31.3 for process piping design, fabrication, inspection, and testing.
• ASTM A270 for tubing quality.
• AWS-certified welders with orbital welding where geometry allows.
• Project-specific QC documentation and inspection records provided.
• Adaptable to additional hyperscale or OEM standards. 

• Yes — smoother welds reduce fouling, biofilm, and minimize crevices where corrosion can initiate.
• Practices drawn from food/pharma yield clean, leak-tight assemblies.
• Not full sanitary polish, but typical industrial piping data center fabrication quality.
• Supports longer service life and fewer leaks. 

304 SS — standard for glycol/water loops (best balance of cost and resistance). 

• Tube-laser workflows and 3D-printed fixtures and jigs ensure consistency.  
• Tolerance bands locked for OEM programs, set per-project for ETO builds.
• Gauge checks and dimensional inspections performed throughout fabrication.
• Inspection records provided at FAT turnover. 

• Inspection data logged per project.
• Trend tracking is not standard.
• SPC (statistical process control) available for OEM or volume programs. 

• Yes — rack-level manifolds, CDU skids (2–10 MW/module), welded headers, and distribution.
• Custom layouts tailored to site density, footprint, and redundancy requirements.
• ETO and OEM programs supported. 

• Skids built up to 40 ft long with narrow clearances (~2 ft).
• BIM coordination ensures clash-free integration.
• AR/VR walkthroughs validate service access and maintenance. 

• Autodesk Construction Cloud used for clash detection and BIM integration.
• 30/60/90 reviews and detailed as-builts provided.
• Welded joints by default; flanges/tri-clamps where service is required.
• Prefab and FAT reduce on-site hours. 

• Direct-to-chip (D2C), direct liquid cooling (DLC), and immersion skids.
• Heat exchangers sized for low ΔP, improving pump efficiency and lowering total system energy use.
• Modular CDU architectures scale linearly with HPC rack density.
• Hybrid designs are possible for phased deployments. 

• Yes — QC, documentation, and component selection aligned per project.
• Experience adapting to internal standards across power, redundancy, vibration, and metallurgy. 

• Orbital-quality welds with pulled-port manifolds (fewer joints vs. stacked tees).
• Hydrostatic and pneumatic pressure testing are performed before shipment.
• Annual gasket replacement intervals and clamp torque guidance provided.
• Custom leak-prevention strategies for high-pressure or vibration-prone sites. 

• No public data due to site variability.
• Each CDU is hydro-tested and FAT-documented.
• Pressure test results and inspection records supplied with turnover. 

• Hydrostatic testing to operating pressure.
• Optional pneumatic and helium leak testing when specified.
• FAT with simulated glycol/tower water.
• Customer-witnessed FATs available on any project. 

• Default — welded connections (fewest leak points).
• Flanges used in high-vibration or service-critical areas.
• Tri-clamps where routine access is needed. 

• Same-day emergency builds executed in rare cases.
• Fast Fittings group delivers sketch-to-part in ~3 days.
• Lead time depends on scope and long-lead materials.
• Forecasting and multi-unit orders improve vendor priority. Get us the POs early, and we can help forecast and build the supply chain to manufacture and deliver your products. 

• No pre-welded assemblies.
• Large inventory of stainless steel and pump components for fast builds.
• Stocked compact CIP, pump carts, fittings, and installation material available. 

• 170,000 sq ft fabrication capacity.
• High-volume machining center for repetitive fittings.
• 100+ craftsmen and 40+ engineers for large-scale deployments.
• Proven track record of OEM and hyperscale programs. 

• Orbital welding wherever geometry allows.
• Tube-laser cutting and manifold pullers in use.
• Robotic welding under evaluation (adoption pending QC equivalence).
• Jigs and fixtures maintain consistency across batches. 

• Baseline: AWS-certified welders, ASME B31.3 standards, staged inspections.
• Hydrostatic testing on all assemblies.
• Helium leak testing is optional when specified.
• Enhanced QC for skidded systems with full documentation packages. 

• Yes — audits, shop visits, and customer-witnessed FATs are encouraged.
• Turnover package includes dimensional records, hydro/pneumatic results, and O&M manuals. 

• Yes. CSI supports startup, commissioning, and operator training for skids and assemblies.
• Documentation includes O&M manuals, test reports, and spares lists to support long-term reliability.
• A dedicated project manager and service team remain available after handover for ongoing support. 

• Modular CDU design: Our CDUs are engineered as modular building blocks, allowing linear scaling as rack density and site demand grow.  
• Capacity range: Standard CDU modules cover ~2 MW up to 10 MW, but CSI can engineer larger single units when project requirements call for it.
• Multi-HX arrays: Instead of relying on a single oversized heat exchanger, CSI often designs arrays of multiple smaller HXs manifolded together. This approach improves:
  • Lead time (smaller HXs are faster to source)
  • Cost efficiency (avoids the premium of oversized units)
  • Serviceability (individual HXs can be maintained without taking the system offline)
  • Redundancy (if one HX is offline, the array continues to operate)
  • Resilience and lifecycle support: By combining modular CDUs and HX arrays, CSI balances scalability, redundancy, and ease of service —ensuring reliable growth paths for hyperscale and colocation facilities. 

Design reviews typically run in Microsoft Teams; email is the official record (shared project folder). 

A single Project Manager (PM) is assigned at order and sets the review/status cadence; email remains the source of truth.  Customers sometimes set the cadence of update meetings, which usually coincide with the availability of the necessary stakeholders on their side.

Changes are captured in drawing/model reviews, and on a design change log. If cost or lead time is affected, CSI issues a change order; like-for-like corrections to protect schedule may be executed by the PM and documented.

 Quote → Order → Drawing/Model & Instrument List generation and approval → Fabrication → Inspection/FAT → Shipment.

Verification of sequence of operations, mechanical walkdown against P&ID’s, I/O setpoints/interlocks, alarms, verification of applicable CSI tests, and documentation; any punch-list is aligned prior to shipment.

A complete turnover package and any required programming updates; post-site changes are documented and redistributed.

Within 2 weeks. Budgetary quotes are available early.

Primary risk is long-lead vendor capacity. CSI may propose like-for-like substitutions (customer-approved) to protect schedule. Expedite fees—if needed—are priced upfront.