ISO/DIS 7195

Nuclear energy -- Packagings for the transport of uranium hexafluoride (UF6)

Énergie nucléaire -- Emballages pour le transport de l'hexafluorure d'uranium (UF6)

Standards Content (sample)

DRAFT INTERNATIONAL STANDARD
ISO/DIS 7195
ISO/TC 85/SC 5 Secretariat: BSI
Voting begins on: Voting terminates on:
2015-10-22 2016-01-22
Nuclear energy — Packagings for the transport of uranium
hexafluoride (UF6)

Énergie nucléaire — Emballage de l’hexafluorure d’uranium (UF6) en vue de son transport

ICS: 27.120.30
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 7195:2015(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. ISO 2015
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ISO/DIS 7195:2015(E)
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© ISO 2015, Published in Switzerland

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ii © ISO 2015 – All rights reserved
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ISO/DIS 7195 Rev 0
Contents
Foreword
Introduction
1. Scope and purpose
2. Normative references
3. Terms and definitions
4. Management system
5. General requirements for cylinders
5.1 Design of cylinders
5.2 Fabrication of cylinders
5.3 Cleanliness
5.4 In-service inspections and tests
5.5 Cylinder maintenance / repair
5.6 Cylinder skirt holes for the 48X and 48Y valve protector alternate
5.7 Standard cylinders
6. Specific requirements for cylinders
6.1 1S Cylinder
6.2 2S Cylinder
6.3 5B Cylinder
6.4 8A Cylinder
6.5 12B Cylinder
6.6 30B Cylinder
6.7 30C Cylinder
6.8 48Y or 48X Cylinder
7. General requirements for cylinder valves and plugs
7.1 Manufacturing process for valves and plugs
7.2 Installation of valves and plugs specified in 8.3 and 8.4
7.3 Valve maintenance on cylinders in use
8. Specific requirements for cylinder valves and plugs
8.1 Valves for 1S and 2S Cylinders
8.2 Cylinder Valve 50 (3/4 in)
8.3 Cylinder Valve 51 (1 in)
8.4 Plug
9. Shipping
9.1 New cylinders
9.2 Clean and washed out cylinders
9.3 Other cylinders
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ISO/DIS 7195 Rev 0
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies

(ISO member bodies). The work of preparing International Standards is normally carried out through ISO

technical committees. Each member body interested in a subject for which a technical committee has been

established has the right to be represented on that committee. International organizations, governmental and

non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the

International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.

International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.

The main task of technical committees is to prepare International Standards. Draft International Standards

adopted by the technical committees are circulated to the member bodies for voting. Publication as an

International Standard requires approval by at least 75 % of the member bodies casting a vote.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent

rights. ISO shall not be held responsible for identifying any or all such patent rights.

ISO 7195 was prepared by Technical Committee ISO/TC 85, Nuclear energy, Subcommittee SC 5, Nuclear

fuel technology.

This third edition cancels and replaces the second edition (ISO 7195:2005) which has been technically revised.

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ISO/DIS 7195 Rev 0
Introduction

The transport of uranium hexafluoride (UF6) is an essential operation in the nuclear industry. The packaging

and transport of UF is subject to the relevant transport regulations for dangerous goods of each of the

countries through or into which the material is transported. This International Standard does not take

precedence over applicable governmental regulations, nor does it relieve the consignor and other parties from

compliance with these regulations. For more detailed information, the user of this International Standard is

encouraged to consult the appropriate regulatory document.

The United States Standard ANSI N14.1 (first issued in 1971) has been used internationally as an industry

reference and the standard cylinders included in ANSI N14.1 have been used widely for international transport

of UF6. However, in some cases minor adaptations of the American standard were required to meet local

conditions in a particular country. For example, equivalent materials may have been used instead of the

materials specified. Moreover, the certification of cylinders as pressure vessels can have required equivalent

authorization procedures appropriate in the countries concerned, rather than the US certification procedure

specified.

This International Standard presents primarily information on UF packagings (including valves, plugs, and

valve protectors). It is intended to provide for compatibility of UF packagings among different users within the

nuclear industry. It has been developed from ANSI N14.1, but with incorporation of, and allowance for, other

equivalent materials and national authorization and certification procedures. ISO 7195 was first issued in 1993

and a revision was published in 2005.

Throughout this International Standard and in conformity with standard ISO practice, SI metric units are used

in preference to imperial units (which are given in parenthesis for information). However, generic packaging

designations are based on the cylinder diameter expressed in imperial units (48’’ for instance)

If a common, commercially available component uses features that are defined in an appropriate non-SI

metric-based Standard document, only the relevant base units are quoted.
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DRAFT INTERNATIONAL STANDARD ISO/CD7195
Nuclear energy – Packagings for the transport of uranium hexafluoride (UF )
1 Scope and purpose

This International Standard provides requirements for the procurement and fabrication of new packagings

(including valves, plugs, and valve protectors) for transport of 0.1 kg or more of uranium hexafluoride (UF6)

and for inspection, cleanliness, and maintenance of packagings in service.

It is intended to provide for compatibility of UF packagings among different users within the nuclear industry.

2 Normative references

The following referenced documents are indispensable for the application of this document.

For dated references, the edition current at the time of publication of this International Standard applies.

Editions that supersede these may be adopted with approval of the competent authority.

For undated references, the latest edition of the referenced document (including any amendments) applies.

ANSI/A5.18:1993, Specification for Nickel and Nickel Alloy Bare Wire Electrodes and Rods

ANSI/API Std 527, Seat Tightness of Pressure Relief Valves
ANSI/ASME, Boiler and Pressure Vessel Code 2011
ANSI/ASME B1.1-2003, Unified Inch Screw Threads (UN and UNR Thread Form)
ANSI/ASME B1.5-1997(R2004), Acme Screw Threads
ANSI/ASME B1.20.1-1983(R2001), Pipe Threads, General Purpose (Inch)
ANSI/ASME B16.11-2005, Forged Steel Fittings, Socket-Welding and Threaded

ANSI/ASME B18.3-2003, Socket Cap, Shoulder, and Set Screws, Hex and Spline Keys (Inch Series)

ANSI/ASME NQA-1-1994, Quality Assurance Program Requirements for Nuclear Facilities

ANSI/AWS A5.8/A5.8M:2004, Specification for Filler Metals for Brazing and Braze Welding

ANSI/AWS A5.14/A5.14M:2005, Specification for Nickel and Nickel-Alloy Bare Welding Electrodes and Rods

ANSI/AWS D1.1/D1.1M:2008, Structural Welding Code—Steel

ANSI/CGA V-1-2005, Standard for Compressed Gas Cylinder Valve Outlet and Inlet Connections

ANSI/NB-23 (2007), National Board Inspection Code (NBIC)

ASTM A20/A20M-05, Standard Specification for General Requirements for Steel Plates for Pressure Vessels

ASTM A36/A36M-05, Standard Specification for Carbon Structural Steel

ASTM A53/A53M-06, Standard Specification for Pipe, Black and Hot-Dipped, Zinc–Coated, Welded and

Seamless

ASTM A105/A105M-05, Standard Specification for Carbon Steel Forgings for Piping Applications

ASTM A106/A106M-06, Standard Specification for Seamless Carbon Steel Pipe for High-Temperature

Service

ASTM A108-03e1, Standard Specification for Steel Bar, Carbon and Alloy, Cold-Finished

ASTM A131/A131M-04ae1, Standard Specification for Structural Steel for Ships

ASTM A193/A193M-06a, Standard Specification for Alloy-Steel and Stainless Steel Bolting Materials for High

Temperature or High Pressure Service and Other Special Purpose Applications

ASTM A234/A234M-06a, Standard Specification for Piping Fittings of Wrought Carbon Steel and Alloy Steel

for Moderate and High Temperature Service

ASTM A240/A240M-06b, Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate,

Sheet, and Strip for Pressure Vessels and for General Applications

ASTM A285/A285M-03, Standard Specification for Pressure Vessel Plates, Carbon Steel, Low and

Intermediate-Tensile Strength

ASTM A354-07a, Standard Specification for Quenched and Tempered Alloy Steel Bolts, Studs, and Other

Externally Threaded Fasteners

ASTM A370-05, Standard Test Methods and Definitions for Mechanical Testing of Steel Products

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ISO/DIS 7195 Rev 0

ASTM A516/A516M-06, Standard Specification for Pressure Vessel Plates, Carbon Steel for Moderate- and

Lower-Temperature Service
ASTM A574-04, Standard Specification for Alloy Steel Socket-Head Cap Screws

ASTM A575-96(2002), Standard Specification for Steel Bars, Carbon, Merchant Quality,MGrades

ASTM B16/B16M-05, Standard Specification for Free-Cutting Brass Rod, Bar and Shapes for Use in Screw

Machines
ASTM B32-04, Standard Specification for Solder Metal

ASTM B127-05, Standard Specification for Nickel-Copper Alloy (UNS N04400) Plate, Sheet, and Strip

ASTM B150/B150M-03, Standard Specification for Aluminum Bronze Rod, Bar, and Shapes

ASTM B160-05, Standard Specification for Nickel Rod and Bar
ASTM B161-05, Standard Specification for Nickel Seamless Pipe and Tube
ASTM B162-99(2005), Standard Specification for Nickel Plate, Sheet, and Strip
ASTM B164-03, Standard Specification for Nickel-Copper Alloy Rod, Bar, and Wire

ASTM B165-05, Standard Specification for Nickel-Copper Alloy (UNS N04400)* Seamless Pipe and Tube

ASTM B171/B171M-04E1, Standard Specification for Copper-Alloy Plate and Sheet for Pressure Vessels,

Condensers, and Heat Exchangers

ASTM B209-06, Standard Specification for Aluminum and Aluminum-Alloy Sheet and Plate

ASTM B211-03, Standard Specification for Aluminum and Aluminum-Alloy Bar, Rod, and Wire

ASTM B249/B249M-06, Standard Specification for General Requirements for Wrought Copper and Copper-

Alloy Rod, Bar, Shapes and Forgings

ASTM B366-04b, Standard Specification for Factory-Made Wrought Nickel and Nickel Alloy Fittings

ASTM E2375-04, Standard Practice for Ultrasonic Examination of Wrought Products

NUREG/CR-6407-1996, Classification of Transportation Packaging and Dry Spent Fuel Storage System

Components According to Importance to Safety
SAE J512, Rev. April 1997, Automotive Tube Fittings
SAE J513, Rev. January 1999, Refrigeration Tube Fittings—General Specifications

ISO 263, ISO inch screw threads — General plan and selection for screws, bolts and nuts — Diameter range

0.06 to 6 in

ISO 898-1:1999, Mechanical properties of fasteners made of carbon steel and alloy steel — Part 1: Bolts,

screws and studs ISO 9453, Soft solder alloys — Chemical compositions and forms

ISO 9712, Non-destructive testing — Qualification and certification of personnel

ISO 12807, Safe transport of radioactive material – Leakage testing on packages

Note For the purpose of this International Standard, ANSI N14.5-1997, Leakage tests on packages for

shipment, may be used in lieu of ISO 12807

IAEA Transport Regulations (Regulations for the Safe Transport of Radioactive Materials - Edition applicable

at the time of publication of this standard)

EN 10025:1990, Hot rolled products of non-alloy structural steels — Technical delivery conditions

EN 10025:1990/A1:1993, Amendment 1

EN 10028-3:2003 Flat products made of steels for pressure purposes — Part 3: Weldable fine grain steels,

normalized

EN 10088-2:1995, Stainless steels — Part 2: Technical delivery conditions for sheet/plate and strip for general

purposes

Note 1 Codes and standards with corresponding versions using metric units may be used

interchangeably.

Note 2 With respect to this International Standard, American Society of Mechanical Engineers (ASME)

material and filler metal specifications, identified by the prefix “S,” are interchangeable with corresponding

ASTM International (ASTM) and American Welding Society (AWS) specifications referenced herein.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in the IAEA Transport Regulations and the

following apply.
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ISO/DIS 7195 Rev 0

Note 1 Throughout this International Standard, the word shall denotes a requirement; the word should

denotes a recommendation; the word may denotes a permission, neither a requirement nor a

recommendation.

Note 2 Units are those of the International System, with other units shown in brackets for information.

Note 3 Throughout this International Standard, the words suggested and typical denote an example for

weld constructions, dimensions and/or layout, and means that other solutions may be used provided they

comply with the requirements in the Code and this International Standard, as appropriate.

Note 4 Throughout this International Standard, the words nominal and Schedule qualify a thickness of a

material from stock (plate, bar, pipe, etc.), for which the tolerance is according to the standard specification for

the relevant material.
3.1
authorized inspector
individual who is qualified by the jurisdictional / inspection authority
3.2
clean and washed out cylinder

cylinder that has been previously used and has been cleaned to remove residual quantities of uranium and

other contaminants ; any material left behind on the inside surface of the cylinder after the cleaning operation

shall:

a. not obstruct the internal examination as required in 5.4.2.2-1 of this standard,

b. not influence the quality and chemical purity of the next UF fill, and
c. not react with UF

This definition should not be confused with the category of empty packaging classified under UN 2908 in IAEA

Transport Regulations
3.3
code or “the Code”

pressure vessel code that is acceptable to the competent authority; Section VIII of ANSI/ASME Boiler and

Pressure Vessel Code is an example
3.4
competent authority

national or international regulatory body or authority designated or otherwise recognized as such for any

purpose in connection with this International Standard
3.5
competent inspector

individual who is qualified according to the owner’s requirements regarding inspection activities as detailed in

its quality assurance program
3.6
cylinders
common term used to refer to the packagings defined by this standard
3.7
fabricator
manufacturer, repairer, or modifier of cylinders
3.8
heel
residual amount of UF and/or nonvolatile reaction products in excess of the tare
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ISO/DIS 7195 Rev 0
3.9
heeled cylinder

a cylinder containing a heel in quantities equal to or less than those specified in Table 8 in this document.

This definition should not be confused with the category of empty packaging classified under UN 2908 in IAEA

Transport Regulations
3.10
jurisdictional / inspection authority

entity with the power, right, or authority to interpret and enforce laws, rules, or ordinances pertaining to the

Code
3.11
licensee-user

person or organization that is authorized to conduct activities under a license issued by a competent authority

3.12
minimum design metal temperature (MDMT)

minimum value of design metal temperature at the maximum value of cylinder design pressure to meet the

Code requirements
3.13
maximum allowable working pressure (MAWP)

maximum value of cylinder design internal gauge pressure at the maximum value of cylinder design

temperature
3.14
maximum allowable external working pressure (MAEWP)

maximum value of cylinder design external gauge pressure difference at the maximum value of cylinder

design temperature
3.15
new cylinder

cylinder that has been cleaned to remove fabrication debris and contaminants that would react with UF and

that has never been filled with UF
3.16
owner

individual, agency, contractor, company, or corporation that carries or will carry title to the packaging during its

use
3.17
outer protection

mechanical and / or thermal protection for cylinders containing UF , during transport

3.18
service life

period of time from initial cylinder acceptance of any radioactive material until the cylinder is no longer suitable

for transport of UF , in accordance with this International Standard.
3.19
tare

cylinder mass with valve(s), including cap(s), and plug(s) without valve protector with an internal air or

nitrogen total pressure corrected to 34,5 kPa (5 lbf/in )

Note 1 The tare, colloquially designated tare weight, is denominated in kilograms (pounds).

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ISO/DIS 7195 Rev 0

Note 2 The tare is established before the new cylinder is placed in service and after each five-year periodic

inspection
4 Management system

The licensee-user shall have a management system that meets the applicable requirements of the competent

authorities, for the manufacture, maintenance, repair, and use of the packaging. Certain quality related

activities may be satisfied by obtaining certificates from packaging suppliers (fabricators) stating that their

activities were conducted in accordance with a quality management system that meets the requirements of

the competent authorities.

Fabricators shall be notified concerning their contribution to the above quality management system.

5 General requirements for cylinders

UF shall be packaged for transport in cylinders meeting the manufacture, inspection, testing, and certification

and service requirements of this International Standard.

When shipped, all UF packages shall incorporate a feature, such as a seal that, while intact, shall provide

assurance that the cylinder has not been illicitly opened. This also applies when shipping new and clean and

washed out cylinders.
5.1 Design of cylinders
Cylinders shall:.

- be as shown in the Figures 3 through 11, and be in accordance with the requirements specified in 6.1

through 6.9 of this International Standard,
and
- comply with the Code.

In order to minimize points of leakage, only one valve and one plug (where applicable) should be installed.

However, if the purchaser deems additional valves or plugs necessary, they shall be installed in accordance

with the requirements specified in 6.3 through 6.9.
Lifting lugs shall be:

- as shown in Figure 10, and in accordance with the requirements specified in 6.8 of this International

Standard; additional holes or slots may be provided in lifting lugs (e.g., for tie-down) and shall be

dimensioned such that the fitness for purpose of the lifting lug is not impaired,

- designed, using an appropriate safety factor, to allow the gross mass of the cylinder to be lifted and

restrained during transport.

Additional holes in skirts are permitted and shall be designed such that the fitness for purpose of the package

is not impaired.

Details of cylinder (including skirts, stiffening rings, lifting lugs), valve, plug, and valve protector, as applicable,

are given in Figures 1 through 16.

Threads identified in this International Standard shall conform to ISO 263, unless otherwise specified in this

International Standard.

Metric units shown in this International Standard may have been converted from Imperial units. Rounding of

values is acceptable when not in conflict with the functional specification.
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ISO/DIS 7195 Rev 0
5.1.1 Design conditions

The parameters given in Table 1, along with the values for the minimum volume shown in Table 4, shall be the

basis by which the pressure vessel parts of the various cylinders are designed.
Table 1 - UF6 cylinder design conditions
Design pressure / temperature
Cylinder
Clause
model
MAEWP MAWP MDMT
1S 6.1
2S 6.2
1,38 MPa gauge -196 °C
at 121 °C at 1,38 MPa gauge
172 kPa gauge
5B 6.3
(25 lbf/in² gauge)
(200 lbf/in² gauge (-320 °F
at 250 °F) at 200 lbf/in² gauge)
8A 6.4
12B 6.5
30B 6.6
1,38 MPa gauge -29 °C
at 121 °C at 1,38 MPa gauge
6.7 172 kPa gauge
30C
(25 lbf/in² gauge)
(200 lbf/in² gauge (-20 °F
at 250 °F) at 200 lbf/in² gauge)
6.8
48X and 48Y

Note The requirements regarding the behaviour at low temperature which are included in the transport

regulations shall also be taken into account.
5.2 Fabrication of cylinders
5.2.1 General
Cylinders shall be fabricated and stamped in accordance with the Code.

Longitudinal seam, head-to-shell girth seams, skirts, stiffening rings, lifting lugs, etc., shall be welded as

shown in the relevant figures. Fillet welds shall be in accordance with 5.24 of ANSI/AWS D1.1 and the Code.

All butt welds shall be full penetration unless otherwise specified. Longitudinal skirt welds shall be away from

lifting holes, holes for valve protector alternate and weep holes. Circumferential cylinder seams should be

welded without backing rings. Optionally, circumferential cylinder seams may be welded with backing rings, as

shown in Figure 1.
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ISO/DIS 7195 Rev 0

All welders and welding procedures (brazing included) shall be qualified in accordance with the Code.

Where couplings are to be installed in cylinders, an appropriately sized National Pipe Thread (NPT) plug shall

be inserted into the coupling for the purposes of the coupling being welded into the cylinder. After welding is

completed, the coupling should be allowed to cool before removal of the plug. The coupling threads shall be

inspected following removal of the plug. Tapped threads shall be free of all burrs, gouges, scratches, and the

like. An appropriate sized NPT tap shall be used for a light chase only. Prior to installing a valve or plug, the

coupling shall be gauged to assure compliance with ANSI/ASME B.1.20.1.

Where the material of construction is steel per 5.7, Table 4, at least one test weld representing each welding

procedure to be used in the fabrication of the cylinder shall be Charpy V-notch impact tested. Test plates,

including those for the appendages, shall have butt-type weld joints. The weld metal specimens shall be taken

across the weld with the notch in the weld metal. Each specimen shall be oriented so that the notch is normal

to the surface of the material, and one face of the specimen shall be within 1,6 mm (1/16 in) of the surface of

the material. Each weld procedure shall be qualified with impact testing. This testing shall be as specified by

the Code utilized for the material being welded. Acceptance criteria shall be in accordance with the grade of

steel to be used in fabrication of the cylinder. Procedures and qualifications shall be documented as required

by the Code. The fabricator shall receive the purchaser's formal acceptance of the test results prior to cylinder

fabrication.
5.2.2 Radiography and other non-destructive examinations (NDEs)

All NDE personnel shall be certified in accordance with ISO 9712 or equivalent and inspections shall be

carried out using Code-compliant procedures. The weld imperfections indicated by NDEs shall not exceed the

defects permitted by the Code.

Radiography is applicable for 5B, 8A, 12B, 30B, 30C, 48X and 48Y cylinders, in accordance with the

appropriate section of the Code.

For 5B, 8A, 12B, 30B, 48X and 48Y cylinders, the minimum number of spot X-ray examinations for each

cylinder shall be as required by the Code. Unless otherwise directed by an authorized inspector, the locations

of spots shall be as follows:

1. 5B cylinders: at the circumferential head-to-shell weldment, alternating ends for successive cylinders.

2. 8A, 12B, 30B, 48X, and 48Y cylinders: at the junctions of the longitudinal seam and the

circumferential head weld, alternating ends for successive cylinders.

Alternatively (for the purpose of 5.4.2.2), for 30B, 48X and 48Y cylinders without backing bars, the following

may be required:

- complete (100%) radiography of the longitudinal seam and the head-to-shell girth seams for each

cylinder, and

- additional magnetic particle (MP) or liquid penetrant (PT) testing of shell longitudinal seam, head-to-

shell girth seams, skirt-to-head girth seams, valve and plug coupling welds.

The stiffening ring butt welds shall be examined to ensure full weld penetration. Any weld defects shall be

repaired.
The welds of the lifting lugs shall be subjected to appropriate NDEs.
For 30C cylinders, the following shall be required:

- complete (100%) radiography of the longitudinal seam and the head-to-shell girth seams for each

cylinder shall be required, and

- additional MP and PT testing of other welds (as listed above for the 30B, 48X and 48Y cylinders) and

valve protector cover (VPC) assembly welds.
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ISO/DIS 7195 Rev 0
5.2.3 Testing

1. Hydrostatic strength test: Cylinders shall be subjected to a hydrostatic strength test of the type set

forth in the Code. No leaks shall be permitted. The test pressure shall be twice the MAWP. Prior to

inspection for leaks, the pressure shall be lowered to 1,5 times the MAWP or to 1,38 MPa gauge (200

lbf/in gauge), whichever is the greater. Defects, if any, shall be repaired as permitted in the Code,

and a retest shall follow.

An authorized inspector shall witness all hydrostatic strength tests for new construction.

Note: For in-service cylinders, an authorized inspector or a competent inspector, as required by

national regulations, shall witness all hydrostatic strength tests.

2. Pneumatic leak test: A pneumatic leak test at 690 kPa gauge (100 lbf/in gauge) shall be carried out

on all connections, fittings, and valve seats (and packing where provided) using an appropriate leak-

-4 3

testing fluid. A leak rate larger than 1 x 10 Pa.m /s SLR for each connection, fitting and valve seat

shall not be permitted. The sensitivity of this test shall be enough to detect the leakage. A competent

inspector shall witness all pneumatic leak tests.

CAUTION - Pneumatic pressure tests shall be applied with extreme caution to prevent personal

injury. Pressure shall be raised slowly to the test pressure. The valve packing nut, cap, and

body threads shall not be tightened with the valve at high pressure. The pressure shall be bled

off before any components are retightened, and the test pressure shall be restored slowly. The

pressure source shall be valved off when the test pressure is attained.

Note: Alternative methods of leak testing are acceptable provided that they comply

with ISO 12807.
5.2.4 Cylinder marking

Cylinders shall be identified with, as a minimum, the information shown in Table 2 for that cylinder model.

Note: Information may be presented in SI metric units and / or in imperial units.

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ISO/DIS 7195 Rev 0
Table 2 – Cylinder marking
Model
Markings
5B, 8A, 12 B,
1S and 2S 48X and 48Y
30B and 30C
b a b
Nameplate figure n/a 2 2
Minimum character size
3 (1/8) 4 (5/32) 6,35 (1/4)
mm (in)
Code stamp n/a According to the Code requirements
Code number n/a According to the Code requirements
MAWP Yes
MDMT Yes
Owner’s
Yes
name or symbol
Owner’s seri
...