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BS ISO TR — ISO Technical Reports (TR) Single-File Series Overview (18 Standards)
ISO Technical Reports (TR) Adopted as British Standards — 18 Standards
📋 BS ISO/TR are ISO Technical Reports adopted by BSI under a British number. A Technical Report records technical research, data collection, experience summaries and application guidance; it generally does not constitute normative requirements. This review brings together 18 single-file technical reports in this batch, heavily concentrated on the two technical fields of fluid flow measurement and fire testing, supplemented by product data representation and exchange, petroleum metering and liquid-pump safety.
💡 About half of this batch relates to “flow measurement” (closed conduits, open channels, pressure differential, vortex, ultrasonic, electromagnetic flowmeters and calibration uncertainty). They provide essential background and guidance for the ISO 5167, ISO 8316 and related flow-standard series, and are core reference material for flow measurement engineering.
1. Series Background 📌
ISO Technical Reports (TR) are the file type in the ISO system that records “supplementary information, data collection or guidance”. BSI adopts them directly in the UK through the BS ISO/TR numbering, allowing UK flow metrology and fire engineering fields to reference technical conclusions reached at the international level. Unlike a formal standard, the content of a TR is largely guidance, research and experience summaries, and it is not itself used as a mandatory acceptance basis.
The 18 TRs in this batch fall roughly into: flow measurement (3313, 7066-1, 8363, 9464, 11974, 12764, 12765, 12767, 15377); fire testing (5925-2, 11696-2, 11925-1, 14697); fluid properties and petroleum metering (3666, 9494, 13739); and data and equipment (10303-12, 13989).
⚠️ The guidance, data and study conclusions in a Technical Report are advisory; they are not equivalent to the mandatory clauses of a formal standard. When citing in flow metrology and fire acceptance work, distinguish the guidance in a TR from the normative requirements of the corresponding ISO standard.
2. Standard Inventory (18 items) 📚
The table below lists all 18 single-file BS ISO/TR technical reports in this batch, ordered by number, with the document number and subject.
| Document | Subject |
|---|---|
| BS ISO/TR 3313:1998 | Measurement of fluid flow in closed conduits – Guidelines on the effects of flow pulsations on flow-measurement instruments |
| BS ISO/TR 3666:1998 | Viscosity of water |
| BS ISO/TR 5925-2:1997 | Fire tests – Smoke control door and shutter assemblies – Part 2: Commentary on test method and data |
| BS ISO/TR 7066-1:1997 | Assessment of uncertainty in the calibration and use of flow measurement devices – Part 1: Linear calibration relationships |
| BS ISO/TR 8363:1997 | Measurement of liquid flow in open channels – General guidelines for the selection of method |
| BS ISO/TR 9464:1998 | Guidelines for the use of ISO 5167-1 – Pressure differential devices |
| BS ISO/TR 9494:1997 | Petroleum liquids – Guidance on static and dynamic petroleum measurement |
| BS ISO/TR 10303-12:1997 | Industrial automation systems – Product data representation and exchange – Part 12: Description methods – The EXPRESS-I language reference manual |
| BS ISO/TR 11696-2:1999 | Uses of reaction to fire test results – Part 2: Fire hazard assessment of construction products |
| BS ISO/TR 11925-1:1999 | Reaction to fire tests – Ignitability of building products – Part 1: Guidance on the direct impingement of flame |
| BS ISO/TR 11974:1997 | Measurement of liquid flow in open channels – Electromagnetic flowmeters |
| BS ISO/TR 12764:1997 | Measurement of fluid flow in closed conduits – Vortex flowmeters |
| BS ISO/TR 12765:1998 | Measurement of fluid flow in closed conduits – Ultrasonic time-of-flight flowmeters |
| BS ISO/TR 12767:1998 | Measurement of fluid flow by means of pressure-differential devices – Guidelines to the effects of departure from ISO 5167-1 specifications |
| BS ISO/TR 13739:1998 | Petroleum products – Methods for specifying practical procedures for the transfer of bunker fuels to ships |
| BS ISO/TR 13989:2000 | Liquid pumps – Technical report on safety and performance assessment |
| BS ISO/TR 14697:1997 | Fire tests – Guidance on the choice of substrates for building products |
| BS ISO/TR 15377:1998 | Measurement of fluid flow by means of pressure-differential devices – Guidelines for the specification of orifice plates, nozzles and Venturi tubes beyond ISO 5167-1 |
3. Technical Points of Representative Documents 🔬
1. BS ISO/TR 12765:1998 — Ultrasonic Time-of-Flight Flowmeters in Closed Conduits
This report gives technical guidance for transit-time ultrasonic flowmeters measuring fluid flow in closed conduits, covering operating principle, installation requirements, signal processing, performance indicators and sources of uncertainty. Ultrasonic flowmeters are widely used for water, gas and petrochemical media because they are non-invasive and have a wide turndown ratio; this TR provides systematic reference for their selection, installation and acceptance.
2. BS ISO/TR 7066-1:1997 — Calibration Uncertainty of Flow Measurement Devices: Linear Calibration Relationships
This report provides a systematic method for assessing uncertainty in the calibration and use of flow measurement devices, in particular where calibration data can be described by a linear relationship, explaining how to determine the calibration function and its uncertainty through least-squares fitting, residual analysis and statistical testing. It is an important methodology document for flowmeter calibration laboratories establishing traceable calibration procedures.
3. BS ISO/TR 11696-2:1999 — Fire Hazard Assessment of Construction Products
This report belongs to the “Uses of reaction to fire test results” series and gives a fire hazard assessment method for construction products, explaining how to combine the results of individual reaction-to-fire tests (e.g. ignitability, heat release, smoke density) into fire-scenario analysis, integrated with performance-based fire design. It converts test data into engineering-usable fire hazard information.
4. BS ISO/TR 10303-12:1997 — EXPRESS-I Language Reference Manual
This report belongs to the product data representation and exchange (STEP, ISO 10303) system and gives the EXPRESS-I language reference manual. EXPRESS-I is a textual representation language used to describe and instantiate instances of EXPRESS data models, providing a unified syntax for the instance representation of STEP data exchange, and is an important technical basis for product data interoperability.
5. BS ISO/TR 13739:1998 — Methods for Specifying Practical Procedures for the Transfer of Bunker Fuels to Ships
This report addresses the metering and procedural issues of bunker fuel transfer to ships, giving methods for specifying practical operating procedures, covering pre-transfer metering confirmation, procedural control during transfer and post-transfer settlement. It serves the standardisation of ship bunkering operations and the fairness of trade settlement, and is an important reference in the marine fuel metering field.
✅ The five representative reports above cover ultrasonic flowmeters, calibration uncertainty, fire hazard assessment, product data exchange and ship fuel metering, illustrating the role of ISO/TR across “metrology methods, fire engineering and data interoperability”. The remaining 13 are listed in the full inventory table.
4. Engineering Practice 🛠️
- 🌊 Flow metrology: ultrasonic (12765), vortex (12764), electromagnetic (11974) and pressure-differential (12767/15377/9464) flowmeter guides support instrument selection, installation and acceptance, combined with calibration uncertainty (7066-1) for metrological traceability.
- 🔥 Fire engineering: fire hazard assessment of construction products (11696-2), ignitability testing (11925-1), substrate selection (14697) and smoke-control door/shutter assemblies (5925-2) together support fire design and performance-based assessment.
- 📦 Data interoperability: EXPRESS-I (10303-12) provides a unified instance representation syntax for product data exchange, a technical basis for CAD/CAM/PDM integration.
- 🛢️ Petroleum metering: viscosity of water (3666), petroleum metering guidance (9494) and ship bunker-fuel transfer (13739) serve trade settlement and metering management of petroleum products.
5. Frequently Asked Questions ❓
❓ Q: What is the difference between an ISO Technical Report and a formal International Standard?
A: A TR is a technical report providing guidance, data, study conclusions or supplementary information without mandatory requirements; an International Standard (IS) contains normative clauses that must be followed. TRs often support understanding and application of standards.
A: A TR is a technical report providing guidance, data, study conclusions or supplementary information without mandatory requirements; an International Standard (IS) contains normative clauses that must be followed. TRs often support understanding and application of standards.
❓ Q: Are BS ISO/TR documents mandatory?
A: No. They are voluntary technical documents adopted by BSI; they become binding only where legislation or a contract explicitly references them.
A: No. They are voluntary technical documents adopted by BSI; they become binding only where legislation or a contract explicitly references them.
❓ Q: Why are so many TRs in this batch concentrated on flow measurement?
A: Flow measurement involves many measurement principles (pressure differential, vortex, ultrasonic, electromagnetic) and complex uncertainty analysis that a formal standard cannot fully cover; guidance and background studies are therefore issued as TRs to support the ISO 5167 and related flow-standard series.
A: Flow measurement involves many measurement principles (pressure differential, vortex, ultrasonic, electromagnetic) and complex uncertainty analysis that a formal standard cannot fully cover; guidance and background studies are therefore issued as TRs to support the ISO 5167 and related flow-standard series.
🔍 Q: How do I judge whether a TR is still current?
A: Verify current status and edition via the BSI/ISO official catalogue; if superseded by a new edition or a formal standard, switch to the latest document and reassess the applicability of the content.
A: Verify current status and edition via the BSI/ISO official catalogue; if superseded by a new edition or a formal standard, switch to the latest document and reassess the applicability of the content.