ISO/TR 12391-1:2001 PDF

Name: ISO/TR 12391-1:2001 — Gas cylinders — Refillable seamless steel — Performance tests — Part 1: Philosophy, background and conclusions
SKU: ISO/TR 12391-1:2001
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Gas cylinders — Refillable seamless steel — Performance tests — Part 1: Philosophy, background and conclusions

Название (английский):

ISO/TR 12391-1:2001

Gas cylinders — Refillable seamless steel — Performance tests — Part 1: Philosophy, background and conclusions

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 13
Дата публикации:: 20 декабря 2001 г.
Издание:: ISO TR 12391 edition 1 version 1
ICS:: 23.020.30

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Описание (английский):

This part of ISO/TR 12931 applies to seamless steel refillable cylinders of all sizes from 0,5 l up to and including 150 l water capacity produced of steel with tensile strength (Rm) greater than 1 100 MPa. It can also be applied to cylinders produced of steels used at lower tensile strengths. In particular, it provides the technical rationale and background to guide future alterations of existing ISO standards or for developing advanced design standards.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO/TR 12391-1:2001 is an informative Technical Report that documents the philosophy, background and conclusions for performance testing of refillable seamless steel gas cylinders, especially those manufactured from steels with tensile strength (Rm) greater than 1 100 MPa. It covers cylinders from 0.5 l to 150 l water capacity and provides the technical rationale used to introduce additional manufacturing and test controls for higher‑strength steels. The report summarizes the WG 14 research program, test methods, data collection and final recommendations that informed changes in ISO cylinder design standards.

Key topics and technical requirements

Scope and intent: Guidance for assessing fracture performance and fatigue behaviour of high‑strength seamless steel cylinders and for updating ISO design and test standards.

Primary test methods:

Flawed cylinder burst test - finished cylinders with an exterior machined flaw (~75% of wall thickness) are pressurized (monotonic or cyclic, hydraulic) to observe leak vs. fracture behaviour.
Flawed cylinder cycle test - shallow machined flaw (~10% of wall thickness) with cyclical hydraulic pressurization to evaluate fatigue life.
Charpy V‑notch (CVN) impact test - transverse orientation at −50 °C used as a secondary toughness control.
Standard tensile testing to record mechanical properties.

Fracture performance focus: Distinguishes between leak‑before‑break (LBB) and running crack fracture modes and addresses the potential toughness reduction at higher tensile strengths.

Data program and validation: Over 500 standardized tests from multiple manufacturers were compiled in a common data bank (NIST) to validate the flawed cylinder approach and CVN acceptance criteria.

Conclusions: The flawed cylinder burst test is an effective manufacturing control to predict fracture initiation; CVN at −50 °C supports toughness acceptance. The flawed cylinder cycle test was later adopted in ISO 9809‑2 to control fatigue performance.

Applications and users

Cylinder manufacturers developing or qualifying high‑strength seamless steel cylinders

Design and materials engineers evaluating fracture and fatigue safety margins

Test laboratories and quality control teams implementing flawed burst/cycle and impact tests

Regulators and certification bodies assessing compliance of new cylinder designs

Standards committees and researchers updating design rules or creating advanced design standards

Related standards

ISO 9809‑1:1999 - design and testing for quenched and tempered steel cylinders (Rm < 1 100 MPa)

ISO 9809‑2:2000 - design and testing for cylinders with Rm ≥ 1 100 MPa (adopts flawed cycle test)

ISO 6406:1992 - periodic inspection and testing of seamless steel gas cylinders

ISO/TR 12391 Parts 2–4 - detailed test data and procedures (fracture and cycle tests)

Keywords: gas cylinders, seamless steel, refillable cylinders, flawed cylinder burst test, fracture performance, Charpy V‑notch, fatigue cycle test, ISO 9809‑2, leak‑before‑break, tensile strength >1100 MPa.

ISO/TR 12391-1:2001 PDF

Abstract

Похожие стандарты

Overview

Key topics and technical requirements

Applications and users

Related standards

Технические детали

ISO 9809-1:1999

Gas cylinders — Refillable seamless steel gas cylinders — Design, construction and testing — Part 1: Quenched…

ISO 9809-2:2000

Gas cylinders — Refillable seamless steel gas cylinders — Design, construction and testing — Part 2: Quenched…

ISO 6406:1992

Periodic inspection and testing of seamless steel gas cylinders

SIST EN ISO 9809-2:2019

Gas cylinders - Design, construction and testing of refillable seamless steel gas cylinders and tubes - Part…

ISO/TR 12391-4:2002

Gas cylinders — Refillable seamless steel — Performance tests — Part 4: Flawed-cylinder cycle test