Monthly Roundup: Fluid Systems and Components Standards from July 2025 (Part 1)

Looking back at July 2025, the Fluid Systems and Components for General Use sector saw a substantial wave of standardization activity with the publication of five major standards. This monthly overview distills the key insights, technical requirements, and implications of these documents for industry professionals seeking to maintain an up-to-date understanding of sectoral best practices. Whether your role involves engineering, compliance, procurement, or quality management, this retrospective recap brings into focus both the technical essentials and broader industry shifts reflected in July's publications.

With advancements in acoustic measurement, valve systems, and hydraulic hose specifications, the July 2025 standards mark critical updates addressing evolving technologies, safety challenges, and the drive for global harmonization. This analysis is tailored to help you prioritize compliance efforts, understand emerging trends, and identify standards that may significantly impact your operations—helping you stay current in a rapidly changing industry landscape.

Monthly Overview: July 2025

The month of July 2025 represented a diverse and impactful period for standardization in the Fluid Systems and Components for General Use sector. Spanning fan acoustics, valve integration, thermoplastic ball valves, and hydraulic hose assemblies, the standards published highlight a keen focus on reliability, safety, measurement accuracy, and material performance. Compared to previous months, this period was notable for the alignment of international and European approaches, technical revisions building on prior editions, and the expansion of guidance to encompass both laboratory testing and field-applicable procedures.

Key themes emerging from July's publications include:

• Acoustic performance and test standardization for industrial fans
• Enhanced procedures for valve fitting and assembly in gas pressure systems
• Material-specific requirements and best practices for thermoplastic valves and hydraulic hoses
• Emphasis on safety, consistency, and traceability throughout component lifecycle management

Taken together, these standards indicate a sector responding dynamically to growing scrutiny over system safety, market demand for lighter and more versatile materials, and the need to reflect the latest in test methodology. The movement towards harmonized testing and expanded applicability is particularly evident in fan acoustic standards, while the attention to valve and hose requirements points to sustained efforts to support versatile, globalized supply chains.

Standards Published This Month

ISO 13347-1:2025 - Fans – Determination of Fan Sound Power Levels Under Standardized Laboratory Conditions – Part 1: General Overview

Fans – Determination of Fan Sound Power Levels Under Standardized Laboratory Conditions – Part 1: General Overview

This second edition of ISO 13347-1 establishes the principles for determining the acoustic performance of fans, providing an overarching structure for subsequent, more detailed parts of the ISO 13347 series. The standard encompasses both standalone fans and fans integrated with devices such as silencers or dampers, placing a strong emphasis on laboratory-based testing protocols.

The document details:

• The theoretical and practical basis for measuring fan sound power levels, including one-third octave and octave bands
• Laboratory test conditions and instrumentation requirements for reliable and repeatable measurements
• Installation and operating scenarios, covering five defined fan installation categories for ducted and non-ducted systems
• Guidance on reporting, measurement uncertainty analysis, and data use for product comparison and design optimization

Targeted at HVAC manufacturers, building system designers, test laboratories, and acoustics engineers, this standard provides the essential foundation for ensuring comparability and regulatory compliance in fan noise assessments. The 2025 revision incorporates changes for acoustic methods for new installation categories, harmonized symbols, and editorial refinements, replacing the 2004 edition and associated amendments.

Key highlights:

• Foundation for standardized fan acoustic testing globally
• Harmonization with related acoustic standards and fan performance norms
• Applicable to product development, certification, and market claims

Access the full standard:View ISO 13347-1:2025 on iTeh Standards

ISO 13341:2025 - Gas Cylinders – Fitting of Valves to Gas Cylinders

Gas Cylinders – Fitting of Valves to Gas Cylinders

ISO 13341:2025 details the procedures for attaching valves to gas cylinders—crucial for maintaining system integrity, leak prevention, and operational safety across industrial, commercial, and transportable gas systems. Scope covers all relevant valve and cylinder combinations connected using ISO screw threads (as specified in ISO 11363-1 and ISO 15245-1). The document prescribes methods for both taper and parallel screw threads, including preparation, inspection, torque application, and alignment.

Among the notable inclusions are:

• Mandatory pre-assembly inspection to verify compatibility and thread condition
• Specific torque value tables for steel, aluminium alloy, and composite cylinders (Annex A)
• Guidance on sealant application, alignment for cylinders with fixed shrouds, and torque measurement
• Recommendations for equipment, safety checks, and best practices in both manual and automatic assembly settings
• Reference to global thread identification (ISO/TR 11364) for users dealing with non-ISO-threaded combinations

This standard is vital for manufacturers, gas distributors, cylinder refurbishers, and safety inspectors who must ensure reliable sealing and avoid catastrophic valve ejection. The 2025 revision updates cleaning requirements for cylinder threads, brings regulatory references up to date, and emphasizes adherence to both general and manufacturer-specific assembly guidance.

Key highlights:

• Stepwise procedures for assembly of all major cylinder/valve types
• Comprehensive torque and sealing recommendations
• Enhanced focus on cleaning, alignment, and equipment maintenance

Access the full standard:View ISO 13341:2025 on iTeh Standards

ISO 18984:2025 - Ball Valves for Thermoplastics Piping Systems for Hot and Cold Water Installations Under Pressure – Types, Dimensions and Requirements

Ball Valves for Thermoplastics Piping Systems for Hot and Cold Water Installations Under Pressure – Types, Dimensions and Requirements

ISO 18984:2025 introduces a comprehensive specification for two-way and multi-way ball valves manufactured from polypropylene (PP) and chlorinated polyvinylchloride (PVC-C) for pressurized hot and cold water systems. Addressing the growing use of thermoplastic piping in domestic, commercial, and utility applications, the standard clarifies requirements for valve design, function, and material qualification.

Highlights of the document include:

• Dimensional requirements for assembly in thermoplastic pipelines, informed by ISO and EN series references
• Material specifications not only for PP and PVC-C but allowing inclusion of other plastics where application classes are substantiated in relevant material standards
• Guidance for mechanical performance (pressure containment, endurance, leak resistance)
• Design distinctions between two-way valves (flow control/sectioning) and multi-way valves (diversion/mixing)
• Clear exclusion of metallic and copper alloy pipe systems from scope

Utility engineers, piping designers, and manufacturers will find this standard instrumental for ensuring compatibility, regulatory conformance (especially regarding human consumption water), and durability in modern building services.

Key highlights:

• Standardization of valve types and end connections for plastic piping
• Comprehensive coverage of both mechanical and application-specific requirements
• Supports hygienic and regulatory objectives for potable water systems

Access the full standard:View ISO 18984:2025 on iTeh Standards

ISO 13347-4:2025 - Fans – Determination of Fan Sound Power Levels Under Standardized Laboratory Conditions – Part 4: Sound Intensity Method

Fans – Determination of Fan Sound Power Levels Under Standardized Laboratory Conditions – Part 4: Sound Intensity Method

Part of the comprehensive ISO 13347 series, ISO 13347-4:2025 details a robust procedure for measuring fan sound power via sound intensity methods. This second edition bridges laboratory reproducibility, real-world applicability, and cross-standard alignment (with ISO 9614 and ISO 5801), targeting accuracy and comparability in airborne sound emission assessments.

Key topics covered:

• Principle and practice of enveloping surface sound intensity measurement for fans (including ducted and un-ducted)
• Requirements for measurement surfaces, instrumentation (including calibration and field checks), and acoustical environment
• Step-by-step instructions for fan installation, mounting, and test point selection
• Reporting requirements, including uncertainty estimation and standardized presentation of results
• Alternative procedures for large fans or special installations

Applicable to fan manufacturers, acoustic consultants, HVAC designers, and laboratories, the standard underpins reliable product labelling, compliance verification, and design optimization in response to increasingly stringent regulatory and market demands for low-noise solutions. The revision adds new methods for category E fans, modernized symbols (in line with ISO 5801), and updated editorial content.

Key highlights:

• Advanced, reproducible sound intensity measurement for any fan size
• Precise guidance on test setup and performance verification
• Enables transparent comparison and regulatory demonstration for sound emissions

Access the full standard:View ISO 13347-4:2025 on iTeh Standards

EN ISO 18752:2025 - Rubber Hoses and Hose Assemblies – Wire- or Textile-Reinforced Single-Pressure Types for Hydraulic Applications – Specification (ISO 18752:2025)

Rubber Hoses and Hose Assemblies – Wire- or Textile-Reinforced Single-Pressure Types for Hydraulic Applications – Specification (ISO 18752:2025)

Serving as the fifth edition and adopted as a European Standard, EN ISO 18752:2025 defines requirements for ten hydraulic hose classes (across four grades and seven types) using wire or textile reinforcement, covering nominal sizes from 5 to 102. This harmonized document is critical for organizations designing or maintaining modern hydraulic systems across industrial, construction, and mobile applications.

Key elements include:

• Common requirements for hoses used with a broad range of hydraulic fluids (oil-based, water-based, and water), specifying temperature resistance for each fluid category
• Performance requirements address physical properties (fluid resistance, hydrostatic strength, flexibility, adhesion, impulse resistance, vacuum resistance, ozone and abrasion resistance)
• Exclusion of end-connection specifications, reinforcing the focus on hose/assembly performance
• Guidance for compatibility checks, robust markings, and manufacturer documentation
• Revised requirements in alignment with ISO 1817 for fluid immersion, and updated test protocols for reliability and safety

Manufacturers, maintenance organizations, contractors, and quality assurance professionals will benefit from the clarity and harmonization provided—essential for systems operating in harsh or critical environments.

Key highlights:

• Ten-class system supporting precise application-matching
• Harmonized requirements for compatibility, labelling, and documentation
• Updated testing and material compatibility provisions for system safety

Access the full standard:View EN ISO 18752:2025 on iTeh Standards

Common Themes and Industry Trends

A review of July 2025's standards reveals several cross-cutting trends:

• Measurement and performance verification: Both fan acoustic standards demonstrate the sector’s commitment to objective, comparable laboratory testing, reflecting demands for transparency and interoperability across markets.
• Safety and assembly reliability: Procedures for gas cylinder valve fitting and requirements for hydraulic hose assemblies highlight persistent industry challenges around leak prevention, mechanical integrity, and in-service safety—especially as more advanced materials (e.g., composites) become prevalent.
• Material specificity and adaptability: Thermoplastics and elastomerics feature prominently, responding to increasing adoption in piping, valve, and hose systems for their light weight, durability, and corrosion resistance.
• International and regional harmonization: The dual publication of ISO and EN ISO standards, as well as close alignment with European and international norms, underscores a market reality of globalized supply, cross-border projects, and harmonized compliance expectations.

With ongoing innovation in materials and growing regulatory scrutiny on efficiency and safety, these July 2025 standards collectively shape a more rigorous, versatile foundation for fluid systems used worldwide.

Compliance and Implementation Considerations

For organizations impacted by these standards, several practical considerations are recommended:

• Review and update internal specifications to incorporate revised acoustic measurement and testing methods for fans, and adopt new valve/hose material and assembly protocols into procurement and QA processes.
• Train technical and field staff on the updated assembly, installation, and reporting requirements (especially relevant for gas cylinder valve fitting and hydraulic hose assembly).
• Conduct product and process audits against new testing and documentation requirements to verify readiness for regulatory or market-driven assessments.
• Prioritize risk assessment for legacy systems or where changes in materials (e.g., transition to thermoplastics or synthetic rubber) may influence performance, compatibility, or safety margins.
• Engage with manufacturers and suppliers to obtain the latest certification and performance declarations, particularly for critical or safety-related components.
• Monitor transition timelines for the withdrawal of earlier standards, and coordinate with certification bodies to ensure seamless compliance.

Conclusion: Key Takeaways from July 2025

The month of July 2025 brought significant advancements in the standardization of fluid systems and components for general use. The breadth of topics—from fundamental acoustic testing to the material-specific requirements for valves and hoses—signals a sector attuned to the dual challenges of innovation and operational safety. Industry professionals should view these new and revised standards as more than regulatory checklists; they are essential tools for assuring product reliability, market competitiveness, and end-user safety.

Key recommendations for professionals include:

• Actively integrate the new standards into design, installation, and maintenance practices
• Utilize harmonized testing and performance protocols for market access and risk reduction
• Stay engaged with ongoing updates and part 2 of this monthly overview for a complete sector snapshot

To delve further into industry trends and ensure your business remains at the forefront of quality and compliance, visit iTeh Standards for full access and detailed analysis of these documents.