Global Hydrogen Blending Control Systems Market Outlook, 2031

Hydrogen blending control systems constitute the process-control layer that enables the controlled injection of hydrogen into natural gas networks, and their regulatory and technical perimeter is defined less by commercial product categories than by the standards, codes, and gas-quality obligations that govern blended-gas transport. The internationally recognized reference for hydrogen pipeline design is ASME B31.12, which provides design rules for new pipelines and criteria for converting pipelines originally designed for other fluids, covering materials, fabrication, inspection, testing, operation, and maintenance, including material qualification and embrittlement considerations. Complementary documents include EIGA 121/14, IGEM/TD/1, PD ISO/TR 15916, CEN/TR 17797, and DVGW G 409, and India’s PNGRB has anchored its own regulatory framework in ASME B31.12, IS 2825, and ISO/TR 15916, applying relevant portions of ASME B31.12 when blending exceeds 10% and adopting it more fully for blending above 20%. PNGRB’s draft hydrogen blending guidelines impose detailed control-system obligations: hydrogen concentration at the blending facility outlet, measured after the validated mixing length, must be continuously monitored and recorded, and the authorized entity must monitor calorific value, relative density, and Wobbe Index to demonstrate compliance with gas-quality, appliance-performance, and heat-content billing-adjustment requirements. The guidelines require validation of homogeneity during commissioning, go-live, material changes, and abnormal flows, and they mandate that only adequately odorized blended gas be supplied, with odorant effectiveness validated across the 0–5% blend range at representative endpoints. The technical consensus emerging from pilots in France, Italy, Germany, Portugal, and Spain converges around an upper limit of approximately 20% hydrogen by volume, beyond which calorific value drops, material stress rises, and burners misbehave, while cross-border interconnections remain capped at 2%.

The manufacturing and development base is led by flow-control and instrumentation majors with hydrogen-ready product lines and skid integration capability. Emerson’s Fisher and Tartarini portfolios provide a 100% hydrogen pressure regulating skid using self-operating devices with no wires, alongside injection and blending skids designed and customized to customer specifications and local industry standards, with product families including FL, BM5, OSE, EZH, 627, MR95, and CSB. ESA S.P.A. builds fuel skids with automation up to SIL 3 level and offers the Phlogiston system for mixing hydrogen or LPG with pipeline natural gas at the beginning of an industrial installation, alongside multigas mixing stations with calorimeter integration, 3D design, skid construction and assembly, and testing and calibration under ISO 9001 and ISO 14000 certification. FT Gas Control Systems designs, manufactures, installs, and commissions gas pressure control systems for natural gas, biogas, CNG, and hydrogen from Class 2500 to low pressure, delivering modular plug-and-play skid units and assisting with hydrogen blending and pure hydrogen control. GTS Controls Energy engineers gas mixing skids for controlled mixing of two or more gases, including HNx systems for precise nitrogen-hydrogen blending. Linde, Air Liquide, and Air Products and Chemicals provide industrial-gas blending equipment and have been active in multiple hydrogen blending pilot projects, while Wärtsilä develops hydrogen-ready engines and gas mixing systems, Siemens Energy supplies hydrogen-capable turbines and grid solutions, and Baker Hughes provides compressors and blending technology for hydrogen. Landi Renzo, through SAFE and its compression-plant division, contributes dynamic blending capability with an electronically controlled pressure regulator and a control unit that dynamically adjusts hydrogen and methane injection.
Market Dynamics

Market Drivers • ASME B31.12 and the Codification of Hydrogen Pipeline Design and Conversion: The most powerful driver across the global hydrogen blending control systems market is the emergence of ASME B31.12 as the only internationally recognized standard for hydrogen transport in pipelines, providing both design rules for new pipelines and criteria for converting pipelines originally designed for other fluids. The standard addresses material qualification and embrittlement considerations, and it is complemented by EIGA 121/14, IGEM/TD/1, PD ISO/TR 15916, CEN/TR 17797, and DVGW G 409. PNGRB’s framework explicitly integrates ASME B31.12, IS 2825, and ISO/TR 15916, applies relevant portions of B31.12 when blending exceeds 10%, and recommends full adoption for blending above 20%. The standard’s material-qualification and conversion-criteria provisions directly determine the design of blending skids, the selection of regulators and valves, and the instrumentation required to verify that the blend remains within the qualified envelope.
• PNGRB’s Continuous Monitoring and Interchangeability Obligations: India’s regulatory framework has moved further than most jurisdictions in specifying the control-system obligations that attach to hydrogen blending. PNGRB’s draft guidelines require continuous monitoring and recording of hydrogen concentration at the blending facility outlet after the validated mixing length, monitoring of calorific value, relative density, and Wobbe Index to demonstrate compliance with gas-quality, appliance-performance, and heat-content billing-adjustment requirements, and verification of hydrogen concentration at hydraulically critical, high-demand, farthest, and representative consumer-end locations under peak and minimum demand conditions. Homogeneity must be demonstrated during validation, go-live, material changes, and abnormal flows, with persistent gradients investigated. Odorant effectiveness must be validated throughout the 0–5% blend range, and odorant smell or concentration checked at least fortnightly.

Market Challenges • Measurement Accuracy and the Monitoring Gap at Higher Blend Ratios: A persistent technical challenge in hydrogen blending control arises from the degradation of measurement accuracy as hydrogen concentration increases. Research on turbine and ultrasonic flow meters has found that both remain within accuracy limits for hydrogen blending ratios less than 10% by volume, but recalibration is required above 10% hydrogen, and Coriolis meters can overcount at low flow rates with hydrogen and may deviate from original calibration when calibrated with water rather than the process medium. Experimental analysis with 2–20% hydrogen-enriched gases revealed significant measurement errors in current gas analyzers due to low hydrogen sensitivity and poor hydrogen-nitrogen separation, and full replacement with analyzers suitable for hydrogen blending was found to be the most effective of three improvement strategies in terms of cost, accuracy, and stability. A Korean study noted that approximately 200 gas analyzers are in custody-transfer service and may not adequately reflect hydrogen blending in their composition analysis.
• Embrittlement Risk and the Safety-Index Governance Problem: Hydrogen introduces integrity risks that conventional natural-gas control systems were not designed to manage, particularly hydrogen embrittlement of steels and accelerated fatigue crack growth. A patent filing on dynamic hydrogen-blended natural gas transmission notes that the calculation of the hydrogen blending ratio is often not linked to pipe material grade and defect evolution patterns, and that the target value is disconnected from the actual safety status of the pipeline; the proposed solution calculates a hydrogen embrittlement safety index based on measured hydrogen doping ratio, the target safe hydrogen doping ratio, and the service life of the pipeline, and adjusts the blend when the index falls below a threshold. The 10% by volume level is considered a hinge scenario that activates greater integrity and inspection demands, while 20% is used as a high scenario with greater leak and safety requirements and a higher probability of requiring crack-oriented in-line inspection, conservative fitness-for-service assessment, and station upgrades.

Market Trends • Raman Spectroscopy and Advanced Analytical Instrumentation for Real-Time Composition Monitoring: The market is shifting from periodic sampling and laboratory analysis toward real-time, in-line composition monitoring, and Raman spectroscopy is emerging as the reference technology. The National Energy Technology Laboratory’s Raman gas analyzer uses a low-power visible-wavelength laser and a reflective hollow waveguide sample cell for more intense Raman signals and fast sampling rates, enabling rapid determination of gaseous mixture composition for real-time process control. An industrial Raman-based instrument employing a 450 nm broadband laser diode has demonstrated in-line measurement of natural gas and hydrogen-enriched natural gas composition and related thermodynamic properties, with results showing that Raman spectroscopy can provide a robust, low-maintenance solution for continuous gas-quality monitoring and controlled hydrogen blending. Micromachined ultrasonic transducers offer a complementary approach, with an MUT-based flow meter capable of reporting both gas intake and the molar fraction of hydrogen provided that the natural gas source is kept constant.
• Modular Skid Integration and SIL-Rated Safety Functions: The market is moving toward integrated, modular skids that combine pressure regulation, flow measurement, ratio control, gas analysis, and safety instrumented functions in a single factory-tested package. Emerson’s injection and blending skids are designed and customized to customer specifications and local standards, and its 100% hydrogen pressure regulating skid uses self-operating devices with no wires. ESA S.P.A. builds fuel skids with automation up to SIL 3 level and multigas mixing stations with calorimeter integration, 3D design, skid construction and assembly, testing, and calibration under ISO 9001 and ISO 14000 certification. FT Gas Control Systems delivers modular plug-and-play skid units for natural gas, biogas, CNG, and hydrogen from Class 2500 to low pressure. The modular trend responds to the distributed nature of blending injection points city-gate stations, industrial offtakes, and distribution network entry points and to the financing and schedule constraints of pilot and early-commercial projects, where factory integration reduces site work and commissioning risk.



Segmentation Analysis

Hydrogen blending skids dominate the global market’s capital project value because they integrate pressure regulation, flow measurement, ratio control, and safety functions into a single factory-tested package, and because ASME B31.12 conformity and PNGRB’s homogeneity requirements are most directly satisfied at the skid level. • The global hydrogen blending control systems market is segmented by equipment type into hydrogen blending skids, flow and ratio control systems, and gas composition monitoring systems. Blending skids represent the dominant capital layer, encompassing pressure regulators, flow meters, control valves, mixing elements, and safety instrumented functions packaged as a modular unit.
• Emerson’s Fisher and Tartarini 100% hydrogen pressure regulating skid uses self-operating devices with no wires, and its injection and blending skids are designed and customized to customer specifications and local standards, covering product families including FL, BM5, OSE, EZH, 627, MR95, and CSB.
• ESA S.P.A. builds fuel skids with automation up to SIL 3 level and multigas mixing stations with calorimeter integration, 3D design, skid construction and assembly, testing, and calibration under ISO 9001 and ISO 14000 certification, while FT Gas Control Systems delivers modular plug-and-play skid units for hydrogen blending from Class 2500 to low pressure.
• The dominance of skids reflects the engineering reality that blending is a packaged process: the ratio control, safety logic, and gas-quality verification must be co-designed, and factory integration reduces the commissioning risk that would otherwise fall on site contractors unfamiliar with hydrogen service.

Flow and ratio control systems are the fastest-growing equipment segment because the accuracy of the blend ratio determines whether the gas meets interchangeability specifications, and because the control valve and flow-metering architecture must be matched to the hydrogen concentration and the pipeline operating envelope. • By equipment type, flow and ratio control systems represent the growth segment, encompassing flow meters for hydrogen and natural gas streams, ratio controllers, control valves, and the programmable logic that compares allowable hydrogen flow with measured value and modulates the flow ratio control valve to maintain the set ratio.
• The ratio set point is expressed as a natural gas-to-hydrogen ratio: a 5% hydrogen blend corresponds to a 19:1 ratio, a 10% blend to 9:1, and a 20% blend to 4:1, and the controller must maintain this ratio across variable flow regimes.
• Measurement accuracy is the binding constraint: turbine and ultrasonic meters remain within accuracy limits below 10% hydrogen but require recalibration above that threshold, and Coriolis meters perform within ±0.5% with hydrogen-enriched natural gas up to 30% concentration when properly compensated for pressure and speed-of-sound effects.
• The growth of ratio control reflects the shift from fixed-blend pilot projects to variable-blend commercial operations, where the hydrogen ratio must respond to supply availability, end-user gas-quality requirements, and pipeline integrity constraints rather than being set once at commissioning.

Gas composition monitoring systems are the fastest-growing equipment segment by regulatory necessity because PNGRB and equivalent frameworks require continuous verification of hydrogen concentration, calorific value, relative density, and Wobbe Index, and because conventional analyzers exhibit significant errors in hydrogen-enriched service. • By equipment type, gas composition monitoring systems represent the regulatory-necessity segment, encompassing hydrogen analyzers, gas chromatographs, Raman spectrometers, Wobbe Index meters, and calorific-value measurement instruments.
• PNGRB requires continuous monitoring and recording of hydrogen concentration at the blending facility outlet after the validated mixing length, and monitoring of calorific value, relative density, and Wobbe Index to demonstrate compliance with gas-quality and heat-content billing requirements.
• NETL’s Raman gas analyzer and industrial Raman-based instruments using 450 nm broadband laser diodes provide in-line composition measurement with fast sampling rates and low maintenance, while micromachined ultrasonic transducers can report hydrogen molar fraction alongside gas intake.
• Experimental analysis with 2–20% hydrogen-enriched gases revealed significant measurement errors in current analyzers due to low hydrogen sensitivity and poor hydrogen-nitrogen separation, and full replacement with hydrogen-suitable analyzers was found to be the most cost-effective, accurate, and stable improvement strategy.
• The monitoring segment’s growth reflects the maturation of blending from pilot to commercial operation: pilots can rely on periodic sampling and laboratory verification, while commercial operation requires continuous, auditable, control-loop-compatible measurement.

Transmission networks are the largest application segment globally because they carry the highest gas volumes, the most stringent integrity-management obligations, and the longest distances over which blend homogeneity must be maintained and verified. • By application, transmission networks represent the dominant share, encompassing high-pressure pipeline systems where hydrogen is injected at receipt points and blended gas must remain within gas-quality specifications across hundreds of kilometres.
• Portugal’s transmission grid has been certified for 10% hydrogen after exhaustive assessment of pipelines, welds, compressors, and underground storage, with the REN transmission system operator reporting that 10% can be handled with minor investments provided operating and inspection practices are changed.
• The SHIMMER project has investigated flow assurance of hydrogen blending in Spanish transmission and distribution pipelines operated by Enagás and Redexis, and the technical consensus from European pilots converges around approximately 20% hydrogen by volume as the upper limit before calorific value drops and material stress rises.
• Distribution networks represent the second core application segment, where blending occurs at city-gate or district entry points and where the gas-quality impact on end-user appliances is most direct. Spanish distributor SEDIGAS has tested blends of up to 20% in distribution networks without major structural upgrades, while Portugal’s Floene has begun a 12% green hydrogen blend project in Seixal feeding 80 residential customers.
• Industrial gas networks represent a specialised application segment, where blending is used to decarbonise process heat and combustion systems. ESA S.P.A.’s Phlogiston system mixes hydrogen or LPG with pipeline natural gas at the beginning of an entire industrial installation, and Wärtsilä develops hydrogen-ready engines and gas mixing systems for industrial combustion.

Gas transmission operators are the largest end-user segment globally because they own the high-pressure networks where blending volumes are largest, where ASME B31.12 conversion criteria apply, and where the integrity and gas-quality obligations are most stringent. • By end user, gas transmission operators represent the dominant share, encompassing national transmission system operators and interstate pipeline companies that inject hydrogen at receipt points and must verify blend homogeneity and gas quality across their networks.
• Gas distribution utilities represent the second core end-user group, where blending occurs at city-gate and district entry points and where the impact on domestic and commercial appliances drives conservative blend limits. PNGRB has authorised five pilot projects for hydrogen blending in city gas distribution networks with blending ranges between 2% and 5% by volume, including NTPC Kawas Township in Surat.
• Industrial gas network operators represent a specialised end-user segment, where blending is integrated with combustion systems, furnaces, and process heaters, and where the control system must coordinate with burner management and emissions monitoring. ESA S.P.A. supplies SIL 3-rated fuel skids and multigas mixing stations with calorimeter integration for this segment.
• The dominance of transmission operators reflects the structure of the regulatory obligation: ASME B31.12 conversion criteria, PNGRB’s homogeneity verification, and the 20% blend consensus are most directly applicable to high-pressure transmission networks, and transmission operators own the assets through which blending volumes are largest.

Regional Analysis

Europe leads in hydrogen blending control system deployment because the SHIMMER project, national certification programmes in Portugal and Spain, and the European consensus around a 20% blend limit create an explicit technical and regulatory pathway, while India leads in regulatory codification through PNGRB’s detailed monitoring and interchangeability obligations, and North America follows through ASME B31.12 adoption and industrial blending projects. • Europe is the most advanced market for hydrogen blending control systems, with Portugal’s REN certifying its transmission grid for 10% hydrogen after exhaustive assessment of pipelines, welds, compressors, and underground storage, Spanish distributor SEDIGAS testing blends of up to 20% without major structural upgrades, and the SHIMMER project investigating flow assurance in Enagás and Redexis networks. The technical consensus from pilots in France, Italy, Germany, Portugal, and Spain converges around approximately 20% hydrogen by volume, and cross-border interconnections remain capped at 2%, creating a gap between national capability and cross-border rules that operators describe as technically conservative and commercially stifling.
• India is the most prescriptive market for control-system obligations, with PNGRB’s draft guidelines requiring continuous monitoring and recording of hydrogen concentration after the validated mixing length, monitoring of calorific value, relative density, and Wobbe Index, homogeneity verification at hydraulically critical and farthest consumer-end locations, and odorant effectiveness validation across the 0–5% blend range. PNGRB has authorised five pilot projects in city gas distribution networks with blending between 2% and 5%, and its roadmap sets a phased strategy for 2025–2028 and 2029–2033, with 2% considered safe and 20% requiring new infrastructure.
• North America is a standards-led market where ASME B31.12 provides the design and conversion framework, and where industrial blending projects and utility pilots are advancing at the distribution and industrial-network level. The region’s extensive natural gas infrastructure and its role as the origin of ASME standards give it disproportionate influence over global control-system design practice, even where deployment volumes lag Europe.
• The Middle East and Africa and Latin America are project-driven markets where blending pilots are tied to industrial decarbonisation, gas-network expansion, and export-oriented hydrogen strategies. Regulatory frameworks are less developed than in Europe or India, and control-system specification is often driven by operator standards, EPC requirements, and multilateral development finance.
Considered in this report
• Historic Year: 2020
• Base year: 2025
• Estimated year: 2026
• Forecast year: 2031

Aspects covered in this report
• Hydrogen Blending Control Systems Market with its value and forecast along with its segments
• Various drivers and challenges
• Ongoing trends and developments
• Top profiled companies
• Strategic recommendations

By Equipment Type
• Hydrogen Blending Skids
• Flow and Ratio Control Systems
• Gas Composition Monitoring Systems

By Application
• Transmission Networks
• Distribution Networks
• Industrial Gas Networks

By End-User
• Gas Transmission Operators
• Gas Distribution Utilities
• Industrial Gas Network Operators