PD ISO PAS — ISO Publicly Available Specifications Single-File Series Overview (9 Standards)

📋 PD ISO PAS is the prefix under which BSI publishes ISO Publicly Available Specifications (ISO/PAS) as Published Documents (PD). An ISO/PAS is a specification developed by ISO for subjects that urgently need to meet market/industry demand but are not yet ready for a formal International Standard (IS) — positioned between an ISO Technical Specification (TS) and a formal standard, with fast publication and flexible updating; BSI publishes it in the UK as a PD. This batch collects 9 PD ISO/PAS documents spanning acoustics and traffic noise (road-surface-noise SPB method, audibility of tones in noise), oil & gas and energy (thermal-well casing-connection qualification, electric-vehicle voltage sub-classes), medical-device safety (mucocutaneous blood-exposure risk assessment), automation and functional safety (Object-Process Methodology, motorcycle functional safety), and ships and port safety (shipboard gas detectors, port-facility security assessments). The batch demonstrates the PAS role in “frontier, fast, cross-disciplinary” technical areas.

1. Series Overview and Document Inventory 📌

All 9 documents in this batch are single-file series; most are BSI UK implementations, with 20858 being a verbatim reproduction. The table below lists the complete inventory and main technical content.

2. Representative Standard (1): PD ISO/PAS 11819-4 Road-Surface-Noise SPB Method 🔇

PD ISO/PAS 11819-4:2013 specifies Part 4 of the method for measuring the influence of road surfaces on traffic noise: the SPB method using a backing board. The ISO 11819 series is the international methodology for evaluating “tyre-road” noise: Part 1 is the Statistical Pass-By (SPB) method, Part 2 the Close Proximity (CPX) method, Part 3 the reference road surface; this Part 4 provides an improved SPB variant — the measurement uses a backing board at the measurement point to suppress background-noise/reflection effects, improving resolution of road-surface noise performance in complex acoustic environments. The SPB method statistically relates the maximum sound-pressure levels of passing vehicles to speed, yielding correction parameters that characterise the noise-absorption performance of the road surface — the core method for European “low-noise road surface” evaluation and road acoustic acceptance.

It is the responsibility of EH/1/2 (Transport noise). Low-noise road surfaces (e.g. porous asphalt) are a key measure of road-noise abatement, and the SPB method provides a standardised field-measurement basis for their quantitative evaluation.

3. Representative Standard (2): PD ISO/PAS 12835 Casing-Connection Qualification for Thermal Wells 🛢️

PD ISO/PAS 12835:2013 specifies the qualification of casing connections for thermal wells. Thermal wells are used in geothermal production, heavy-oil thermal recovery (steam stimulation/SAGD) and other high-temperature well conditions; their casing connections must withstand the huge thermal stresses (expansion/contraction) and high pressures of thermal cycling, with leakage and seal failure as major risks. The specification defines qualification test procedures for thermal-well casing connections (e.g. threaded connections, metal-seal structures) — including thermal-cycling loading, seal performance, combined tension/compression/bending loading, gas-tight and liquid-tight tests, and joint dimensional inspection — and gives requirements for connection grading and applicable well conditions. It is the dedicated complement to ISO 13679 (casing/tubing connection testing) for high-temperature well conditions.

It is the responsibility of PSE/17 (Materials and equipment for petroleum, petrochemical and natural gas industries). Geothermal and thermal-recovery operations place extreme demands on connection seal reliability; this qualification specification provides an internationally unified test basis for thermal-well completion-string selection and acceptance.

4. Representative Standard (3): PD ISO/PAS 18761 Mucocutaneous Blood-Exposure Risk Assessment 🩺

PD ISO/PAS 18761:2013 specifies risk assessment on mucocutaneous blood exposure for the use and handling of medical devices covered by the scope of ISO/TC 84 (catheters and syringes). During medical procedures (injection, blood sampling, puncture, catheter insertion), operator skin or mucosa (eyes, mouth, broken skin) may contact patient blood, creating occupational exposure risk of blood-borne pathogens (HBV, HCV, HIV). The specification provides a risk-assessment method for the design, instructions for use and protective measures of such devices, evaluating exposure probability, exposure amount and the effectiveness of protective barriers (shields, retractable needles, safety devices), supporting the implementation of ISO 14971 (medical-device risk management) on ISO/TC 84 products.

It is the responsibility of CH/84 (Catheters and syringes). Occupational sharps/blood-exposure protection is an important infection-control issue; this specification, together with ISO 23908 (sharps protection) and ISO 23975 and other safe-injection standards, supports exposure-risk assessment of medical devices.

5. Representative Standard (4): PD ISO/PAS 19450 Object-Process Methodology (OPM) 🔄

PD ISO/PAS 19450:2015 specifies the Object-Process Methodology (OPM) within automation systems and integration. OPM, proposed by Prof. Dov Dori of Israel, is a unified modelling language and method for integrated structural/behavioural/functional modelling of complex systems (products, processes, organisations): “objects” represent system entities, “processes” represent state transformations of objects, and a dual view — Object-Process Diagrams (OPD) and Object-Process Language (OPL) — expresses the model, supporting stepwise refinement and multi-perspective unification from concept to design. As a modelling methodology of enterprise integration and architecture frameworks (ISO 10303/STEP, ISO 15704/GERAM), it serves systems engineering, Industry 4.0 and complex-product development.

It is the responsibility of AMT/5 (Industrial architectures and integration frameworks). OPM expresses structure, behaviour and function in a single model, avoiding consistency problems of multiple models (e.g. SysML diagrams); it is an important systems-modelling method, later upgraded to ISO 19450 as a formal International Standard.

6. Representative Standard (5): PD ISO/PAS 19695 Motorcycle Functional Safety 🏍️

PD ISO/PAS 19695:2015 specifies functional safety for motorcycles. With motorcycles adopting electronic throttle control, ABS, TCS, electronic steering dampers, x-by-wire and other E/E/PE safety-related systems, functional-safety requirements have become prominent. The specification adapts the framework of automotive functional safety (ISO 26262) to motorcycles, providing motorcycle-specific functional-safety requirements on risk classes (e.g. ASIL/risk grading), the safety lifecycle, safety requirements, hardware/software development, and production/in-service safety — the L-category (two-wheeled/moped) extension of ISO 26262.

It is the responsibility of AUE/14 (Motor cycles and mopeds). It serves the safety-design certification of motorcycle E/E systems and links with ISO 26262 and ISO 25100 (motorcycles) standard families.

7. Remaining Standards at a Glance 📋

• Electric-vehicle high voltage: PD ISO/PAS 19295:2016 (PEL/69) specifies the voltage sub-classes of voltage class B (>60 V d.c./30 V a.c.) for electrically propelled road vehicles, providing a voltage-grading basis for safety design, protection levels and testing of HV components (batteries, drives, charging interfaces), working with the ISO 6469 series (electric-vehicle safety).
• Shipboard gas detection: PD ISO/PAS 19891-1:2016 (SME/32) specifies portable gas detectors for atmosphere testing of enclosed spaces (e.g. O₂, flammable gases, H₂S, CO), serving the pre-entry safe testing of cargo holds, ballast tanks, pump rooms and other enclosed spaces (required by SOLAS Chapter XI-1) — the standard for shipboard gas-detector selection and verification.
• Tone audibility: PD ISO/PAS 20065:2016 (EH/1) specifies an objective engineering method for assessing the audibility of tones in noise, used to identify tone components in noise assessment (e.g. hum of fans, transformers, pumps) and quantify their prominence — the supporting method of the ISO 1996 series (environmental-noise assessment) for “tone correction”, with practical value for noise complaints and limit assessment.
• Port security: PD ISO/PAS 20858:2004 (SME/32) specifies port facility security assessments (PFSA) and port facility security plan (PFSP) development, serving the port-side implementation of the International Ship and Port Facility Security (ISPS) Code, providing methods for threat/vulnerability assessment, security measures and emergency response at port facilities.

8. Frequently Asked Questions ❓