As higher-density AI servers make liquid cooling a baseline, another issue emerges. If each company builds liquid cooling around proprietary specifications, components and maintenance become locked in, and procurement and replacement are tied to specific vendors. To avoid this, the industry standards body OCP (Open Compute Project) is advancing standardization of liquid cooling. This article uses primary information to organize what OCP is trying to standardize and how far that effort reaches.
Areas OCP is standardizing - From cold plates to CDU
OCP's Cold Plate Sub-Project sets out to achieve standardization and an open ecosystem for direct liquid cooling (DLC). Its scope is not limited to the cold plate alone; it extends to the full thermal cooling system (TCS), including CDU (coolant distribution units).
At a higher level, the Cooling Environments Project frames data center cooling across five areas: Cold Plate, CDU, immersion, rear-door heat exchangers, and heat reuse. This is a framework for standardizing cooling not as a single component, but as an end-to-end system that extracts heat and reuses it. In the background is the long history of HPC using liquid cooling, and OCP values the efficiency of heat extraction through warm-water cooling.
Component-level standardization - Connectors and coolants
Standardization extends not only to design concepts, but also to component compatibility. The UQD (Universal Quick Disconnect) specification is being revised to v2.0, moving toward interchangeable connector parts across vendors. On the implementation side, Meta completed evaluation of EPDM hoses for blind-mate quick connectors (BMQC) for ORv3 in January 2026.
Coolant standardization is also moving. OCP released a series of draft coolant guidelines in 2024-2025. BP/Castrol, known for lubricants and related products, is also participating in the development of industry standards for data center coolants, indicating that the liquid-side supply chain is taking shape.
Who is advancing it - The spread of multi-vendor participation
This standardization is not led by a single company. OCP's Cold Plate Sub-Project includes NVIDIA, Meta, Dell, and Intel. Participation across the chip, server, and infrastructure layers indicates an effort to build a supply network based on interoperability rather than a specific vendor's lock-in.
OCP liquid cooling standardization
01
Scope covers the full cooling system
TCS from cold plates to CDU. The higher-level project covers five areas: Cold Plate, CDU, immersion, rear-door heat exchangers, and heat reuse.
02
Component compatibility
The UQD connector specification is being revised to v2.0. Meta completed EPDM hose evaluation for ORv3 BMQC in January 2026.
03
Coolants are being standardized too
Draft coolant guidelines were released in 2024-2025. BP/Castrol is participating in standards development.
04
Multi-vendor participation
NVIDIA, Meta, Dell, and Intel are involved. The goal is an interoperable supply network, built on HPC's liquid cooling track record.
Business implications and checkpoints
As liquid cooling standardization advances, the assumptions behind procurement and maintenance change. The checkpoints are how far the adopted liquid cooling approach aligns with OCP standards for cold plates, CDU, connectors, and coolants; whether multiple sources can be secured through compatible parts such as UQD; and whether coolant selection is consistent with standard guidelines. Standards alignment helps avoid vendor lock-in and preserve flexibility for expansion and replacement. Liquid cooling design and differences among cooling methods are covered in the related articles.
