Data Center Engineering Firm: Roles Across the Water System Design

Data Center Engineering Firm: Roles Across the Water System Design

A data center engineering firm owns the design basis: the water balance, the fire protection hydraulic calculation, the cooling plant configuration and the code selection for every vessel in the system. The tank vendor owns the structural and coating design of the tank itself against the selected standard, and the contractor owns the physical interfaces. When those three boundaries are written into the drawings and specifications, tanks connect on site without rework; when they are not, the decisions that matter - capacity, coating, nozzle orientation, suction conditions - get made by whoever asks first.

Water systems on a data center campus cross disciplines: fire protection, mechanical cooling, process water, plumbing and structural. That crossing point is where design responsibility blurs, and blurred responsibility is expensive at construction stage.

This article describes how a competent engineering firm structures the water system design, what the firm should specify versus what it should leave to the tank vendor's design, and which documents close the gaps. It is written for design leads, vendor engineers and owners' representatives who have to approve the package.

Technical Explanation

What the engineering firm owns

The design firm's deliverables on the water side are the basis on which everything else is built:

•  Water balance: demand, losses by mechanism, refill rates and storage volume derived from them.

•  Fire protection design: suppression demand, duration, hose allowance and the resulting reserve volume.

•  Cooling plant configuration: heat rejection arrangement, flow rates, temperatures and the storage or thermal capacity required.

•  Code and standard selection: which standard governs each vessel, and which edition.

•  Process and instrumentation diagrams, with the point at which the vendor's scope begins marked on the drawing.

•  Structural interface: foundation load data, elevation datum and anchorage design criteria.

What the tank vendor owns

The vendor is the design authority for the tank as a vessel. That scope includes:

•  Shell, stiffener, wind girder and roof design to the specified standard, including wind, snow and seismic cases.

•  Coating or material specification and the process controls that deliver it.

•  Nozzle sizes and orientations to the client's schedule, together with reinforcement design.

•  Bolted joint design, gasket and sealant selection, and the bolt tightening specification.

•  Fabrication drawings, erection drawings and the as-built documentation package.

•  Load data for the foundation, plus anchor bolt layout and tolerance requirements.

The three documents that prevent rework

Projects that hold their schedule tend to have these three documents in circulation early:

•  Design basis memorandum: states duties, capacities, code editions and design margins, so the vendor is not inferring them from a sketch.

•  Frozen nozzle schedule: signed by the mechanical designer and the vendor, with elevation and orientation fixed against the piping model.

•  Interface responsibility matrix: names the party responsible for foundation design, nozzle stubs, instrumentation mounting, testing water supply and commissioning of each water system.

Where the design chain typically breaks

Three recurring failures, all avoidable at design stage:

•  Suction conditions defined too late: if the engineering firm specifies the pump before the tank outlet and minimum water level are fixed, the pump may not achieve its rated flow, and by then the shell is fabricated.

•  Coating chosen from habit rather than water chemistry: a default coating on a process water tank may be unsuitable, and by the time the water analysis arrives the panels are already coated.

•  Instrumentation added by the controls designer after the tank is approved: mounting bosses and cable routes then have to be added to coated panels, which weakens the coating's integrity.

Technical Specifications

Table 1 - Design responsibility matrix for a campus water system

Project Case Study

Project Case Summary - design to code, delivered

The record below is a delivered industrial water storage installation. It is included because the design process - a stated standard, a load case and a documented handover - is the same process a data center water system follows.

Company Expertise

Center Enamel's engineering team works from client design basis documents and issues shop drawings for approval before fabrication, covering shell design, nozzle reinforcement, roof design and anchorage, with design criteria aligned to AWWA D103-09 and OSHA requirements. As-built documentation, coating test records and erection drawings form part of the handover package.

As an outstanding containment and cover system provider with decades of industry experience, Center Enamel sincerely expects to establish long-term cooperation with local partners throughout the world and to make continuous contribution to the development of the industry.

Shijiazhuang Zhengzhong Technology Co., Ltd is not only the first manufacturer in China to produce Glass-Fused-to-Steel tanks, but also the most experienced professional bolted tank manufacturer in Asia. The engineering, design, product testing and quality system of Center Enamel Glass-Fused-to-Steel tanks are in strict accordance with AWWA D103-09, OSHA, ISO 28765, NSF/ANSI 61 and NFPA. By 2023, Center Enamel bolted tanks had been exported to more than 100 countries, including the USA, Australia, Canada, Malaysia, Indonesia, Russia, the UAE, Panama, Brazil and South Africa.

Shijiazhuang Zhengzhong Technology Co., Ltd (Center Enamel) is a professional manufacturer dedicated to the design and fabrication of bolted storage tanks since 2008. Our product range includes Glass-Fused-to-Steel (GFS) tanks, fusion bonded epoxy tanks, stainless steel tanks, galvanized steel tanks and aluminum geodesic dome roofs. With a professional enameling R&D team and nearly 200 enameling patents, Center Enamel has become a leader in the bolted tank industry in Asia. Our products are certified to ISO 9001, NSF 61, EN 1090, ISO 28765, WRAS, FM, LFGB, BSCI and ISO 45001.

Shijiazhuang Zhengzhong Technology Co., Ltd (Center Enamel) is a professional manufacturer dedicated to the design and fabrication of bolted storage tanks since 2008. Our product range includes Glass-Fused-to-Steel (GFS) tanks, fusion bonded epoxy tanks, stainless steel tanks, galvanized steel tanks and aluminum geodesic dome roofs. With a professional enameling R&D team and nearly 200 enameling patents, Center Enamel has become a leader in the bolted tank industry in Asia. Our products are certified to ISO 9001, NSF 61, EN 1090, ISO 28765, WRAS, FM, LFGB, BSCI and ISO 45001.

Shijiazhuang Zhengzhong Technology Co., Ltd is not only the first manufacturer in China to produce Glass-Fused-to-Steel tanks, but also the most experienced professional bolted tank manufacturer in Asia. The engineering, design, product testing and quality system of Center Enamel Glass-Fused-to-Steel tanks are in strict accordance with AWWA D103-09, OSHA, ISO 28765, NSF/ANSI 61 and NFPA. By 2023, Center Enamel bolted tanks had been exported to more than 100 countries, including the USA, Australia, Canada, Malaysia, Indonesia, Russia, the UAE, Panama, Brazil and South Africa.

As an outstanding containment and cover system provider with decades of industry experience, Center Enamel sincerely expects to establish long-term cooperation with local partners throughout the world and to make continuous contribution to the development of the industry.

Frequently Asked Questions (FAQ)

Q: Should the engineering firm specify the tank or leave it to the vendor?

A: Specify the duty, the standard and the interfaces; leave the vessel design to the vendor. A performance-and-interface specification gets a better tank than a fully prescriptive one, because the vendor can apply its own design tools while the client keeps control of capacity, water quality and connections.

Q: Who is responsible if the tank does not hold the required volume?

A: The vendor, provided the required volume and the freeboard assumptions were stated clearly in the specification. Capacity claims should be qualified, because usable volume depends on the overflow elevation, minimum operating level and the dead volume below the outlet.

Q: How is the required storage volume normally established?

A: From the water balance and the redundancy requirement, not from a rule of thumb. For fire reserves the volume comes from the hydraulic calculation and duration; for cooling makeup it comes from the evaporation, blowdown and refill analysis.

Q: What should be in the design basis for a tank package?

A: At minimum: water duty and chemistry, required usable volume, code and edition, design wind and seismic cases, roof requirement, nozzle schedule with elevations, instrumentation, access requirements and the delivery scope boundary.

Q: How early should the tank vendor be engaged?

A: At concept or early detailed design, so that geometry, foundation loads and nozzle positions can be considered while the layout is still flexible. Engaging a vendor only at tender stage usually locks in interfaces that are then expensive to change.

Q: Does a data center need a specialist water engineer?

A: Where the water strategy includes reuse, treatment trains or thermal storage, specialist input is valuable. On conventional projects the mechanical and fire protection engineers usually cover the scope, provided the design basis and interface matrix are maintained.

The engineering firm's job on water systems is to fix the basis - volumes, codes, chemistry, interfaces - and then to hold the boundary against the vendor and the contractor. The three documents that make this work are the design basis memorandum, the frozen nozzle schedule and the interface responsibility matrix. Everything else follows.

Talk to the Engineering Team

If you are preparing a design basis or a specification for campus water storage, send the duties, capacities and code requirements. Our engineering team will review the geometry and coating selection and return vendor design input - load data, nozzle arrangements and standard references - for your package.