इंटरनेट मानक

Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to
information for citizens to secure access to information under the control of public authorities,
in order to promote transparency and accountability in the working of every public authority,
and whereas the attached publication of the Bureau of Indian Standards is of particular interest
to the public, particularly disadvantaged communities and those engaged in the pursuit of
education and knowledge, the attached public safety standard is made available to promote the
timely dissemination of this information in an accurate manner to the public.

“जान1 का अ+धकार, जी1 का अ+धकार” “प0रा1 को छोड न' 5 तरफ”

Mazdoor Kisan Shakti Sangathan Jawaharlal Nehru
“The Right to Information, The Right to Live” “Step Out From the Old to the New”

IS 8451 (2009): PERIODIC INSPECTION AND TESTING OF HIGH

PRESSURE GAS CYLINDERSCODE OF PRACTICE [MED 16: Mechanical
Engineering]

“!ान $ एक न' भारत का +नम-ण”

Satyanarayan Gangaram Pitroda
“Invent a New India Using Knowledge”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता ह”

है”
ह
Bhartṛhari—Nītiśatakam
“Knowledge is such a treasure which cannot be stolen”
 IS 8451 : 2009

Hkkjrh; ekud
mPp nkc ds xSl flfYakMjksa dk vkofèkd fujh{k.k ,oa
ijh{k.k ó jhfr lafgrk
( nwljk iqujh{k.k )

Indian Standard
PERIODIC INSPECTION AND TESTING OF HIGH
PRESSURE GAS CYLINDERS ó CODE OF PRACTICE
( Second Revision )

ICS 23.020.30

© BIS 2009
B U R EAU O F I N D IAN STAN DAR D S
MANAK BHAVAN, 9 BAHADUR SHAH ZAFAR MARG
NEW DELHI 110002

May 2011 Price Group 9

Gas Cylinders Sectional Committee, MED 16

FOREWORD

This Indian Standard (Second Revision) was adopted by the Bureau of Indian Standards, after the draft
finalized by the Gas Cylinders Sectional Committee had been approved by the Mechanical Engineering
Division Council.

This standard was first revised in 1984. In this revision following clauses have been added/modified:

a) Title and scope modified.

b) Depressurization and devalving procedures.
c) Pressure test or ultrasonic examination.
d) Inspection of valves and other accessories.
e) Replacement of cylindrical part.
f) Check on tare weight.
g) Rejection criteria.

Along with the above clauses following annexures have also been added in this revision:

a) Inspection period (Annex A).

b) Corrosive gases to cylinder material (Annex B).
c) Description, evaluation of defects and conditions at time of visual inspection (Annex C).
d) De-valving procedure when cylinder valve is obstructed (Annex D).
e) Volumetric expansion testing of gas cylinders (Annex E).
f) Recommended procedures for inspection and maintenance of valves (Annex F).

The Gas Cylinders Rules, 2004 and the Indian Standard specifications relating to compressed gas cylinder
require that a cylinder be condemned when it leaks, or when internal or external corrosion, denting, bulging,
or evidence of rough usage exists to the extent that the cylinder is likely to be weakened appreciably.

This standard has been formulated as a guide to cylinder users and fillers for establishing their own cylinder
inspection procedures and standards. It is, of necessity, general in nature although some specific limits are
recommended. It should be distinctly understood that it will not cover all circumstances for each individual
cylinder type. Each cylinder user is expected to modify them to suit his own cylinder design or the conditions
of use that may exist in his own service. Rejection, or acceptance for continued use in accordance with these
limits, does not imply that these cylinders are, or are not, dangerous, or subject to impending failure, but
represents practice which has been satisfactory to a cross section of the industry.

Experience in the inspection of cylinders is an important factor in determining the acceptability of a given
cylinder for continued service. Users lacking this experience and having doubtful cylinders should return
them to a manufacturer of the same type of cylinders for reinspection.

In the formulation of this standard, considerable assistance has been derived from ISO 6406 : 2005 ëPeriodic
inspection and testing of seamless steel gas cylinderí.

The composition of Committee responsible for the formulation of this standard is given in Annex H.

For the purpose of deciding whether a particular requirement of this standard is complied with, the final value,
observed or calculated, expressing the result of a test or analysis, shall be rounded off in accordance with
IS 2 : 1960 ëRules for rounding off numerical values (revised)í. The number of significant places retained in
the rounded off value should be the same as that of the specified value in this standard.
 IS 8451 : 2009

Indian Standard
PERIODIC INSPECTION AND TESTING OF HIGH
PRESSURE GAS CYLINDERS ó CODE OF PRACTICE
( Second Revision )

1 SCOPE IS No. Title

This standard deals with seamless steel transportable 8198 : 2004 Steel cylinders for compressed
gas cylinder (single or those from bundles) intended gas (atmospheric gases,
for compressed and liquefied gases under pressure, hydrogen, high pressure
of water capacity from 0.5 litre up to and including liquefiable gases and dissolved
150 litres. It also applies, as far as practicable, to acetylene gases) ñ Code of
cylinders of less than 0.5 litre water capacity. practice
This standard specifies the requirement for periodic 8868 : 1988 Periodical inspection interval for
inspection and testing to verify the integrity of such gas cylinders in use
gas cylinders to be reintroduced into service for a 9122 : 2008 Inspection gauges for checking
further period of time. type 2 taper threads of gas
cylinder valves, taper 3 in 25 ó
This standard does not apply for periodic inspection Specification (first revision)
and testing of acetylene cylinders and composite
cylinders. 10609 : 1983 Refrigerants ó Number
designation
2 REFERENCES
3 INTERVALS BETWEEN PERIODIC
The following standards contain provisions, which INSPECTION AND TEST
through reference in this text, constitute provisions A cylinder shall be due for a periodic inspection and
of this standard. At the time of publication, the test on its first receipt by a filler after the expiry of
editions indicated were valid. All standards are the interval in accordance with the requirements
subject to revision and parties to agreements based given in IS 8868 or as approved by the statutory
on this standard are encouraged to investigate the authority.
possibility of applying the most recent editions of
the standards indicated below: Provided the cylinder has been subjected to normal
conditions of use and has not been subjected to
IS No. Title abusive and abnormal conditions rendering the
3224 : 2002 Valve fittings for compressed gas cylinder unsafe, there is no general requirement for
cylinders excluding liquefied the user to return a gas cylinder before the contents
petroleum gas (LPG) cylinders ñ have been used even though the test interval may
Specification (third revision) have lapsed.
3745 : 2006 Yoke type valve connections for NOTE ó In the case of cylinders used for emergency
small medical gas cylinders purposes (for example fire extinguishers, breathing
apparatus, etc) it is the responsibility of the owner or
(second revision) user to submit it for a periodic inspection and tests within
3933 : 1966 Colour identification of gas the interval specified by national authorities or as
cylinders and related equipment specified in the relevant cylinder design standard, if this
interval is shorter.
intended for medical use
4379 : 1981 Identification of contents of 4 LIST OF PROCEDURES FOR PERIODIC
industrial gas cylinders (first INSPECTIONAND TEST
revision)
Each cylinder shall be submitted to periodic
7285 (Part 2) : Refillable seamless steel gas inspections and tests. The following procedures form
2004 cylinders ó Specification: Part 2 the requirements for such inspection and test and
Quenched and tempered steel are explained in delail in the following clauses:
cylinders with tensile strength
less than 1 100 MPa (112 kgf/mm2) a) Identification of cylinder and preparation for
(third revision) inspection and test (see 5);

1
IS 8451 : 2009

b) Depressurization and devalving (see 6); manner keeping in mind dangers associated with the
c) External visual inspection (see 7); nature of the gas in the cylinder. Cylinders, which
d) Check of internal condition (see 8); contain or may have been contaminated by poisonous
or obnoxious substances, shall be emptied only by
e) Supplementary tests (see 9);
test stations properly equipped and experienced to
f) Inspection of cylinder neck (see 10); handle the particular gas/substance. Such cylinders
g) Pressure test or ultrasonic examination shall be clearly labelled that they have been
(see 11); contaminated.
h) Inspection of valve and other accessories
6.2 The valve shall be opened and if no gas escapes
(see 12);
and the port is not visibly blocked, a charge of low
j) Replacement of cylinder parts (see 13); pressure nitrogen or other inert gas shall be blown
k) Final operations (see 14); and into the valve outlet. Discharge of gas after removal
m) Rejection and rendering cylinder unservice- of the nitrogen supply indicates that the cylinder is
able (see 15). empty. When no gas discharges the valve shall be
treated as obstructed. Where a cylinder has
It is recommended that the previously listed contained poisonous or obnoxious substances, and
procedures be performed in the suggested sequence. the valve is suspected of being obstructed, the gas
In particular, the check of internal condition (see 8) shall be released within an approved appliance and
should be carried out before the pressure test or the valves shall be removed in such a manner that
ultrasonic examination (see 11). the gas escapes without danger to the operator.
Cylinders that fail in inspections or tests shall be 6.3 Should the valve be obstructed the contents of
rejected (see 15). Where a cylinder passes the the cylinder shall be released in safe manner as given
previously listed procedure, but the condition of the in 6.1. Work on cylinders containing combustible
cylinder remains in doubt, additional tests shall be gases shall be carried out in the open air.
performed to confirm its suitability for continued
service (see 9) or the cylinder shall be rendered 7 EXTERNAL VISUAL INSPECTION
unserviceable.
7.1 Preparation for External Visual Inspection
The inspections and tests shall be carried out only When necessary, the cylinder shall be cleaned and
by persons authorized under the relevant regulations. have all loose coatings, corrosion products, tar, oil
Mechanical properties of steel cylinders may be or other foreign matter removed from its external
affected by heat exposure. Therefore, the maximum surface by a suitable method, for example, by
temperature for any operation shall be limited brushing, shot blasting (under closely controlled
according to the manufacturerís recommendation. condition), water jet abrasive cleaning, chemical
cleaning or other suitable methods. The method used
5 IDENTIFICATION OF CYLINDER AND to clean the cylinder shall be validated, controlled
PREPARATION FOR INSPECTIONS AND TESTS process. Care shall be taken at all times to avoid
damaging the cylinder or removing excess amounts
Before any work is carried out, the relevant cylinder
of cylinder wall (see Annex C).
data and its contents and ownership shall be
identified. If fused nylon, polyethylene or a similar coating has
been applied and the same is seen to be damaged or
If contents are identified as hydrogen or other
prevents a proper inspection, then the coating shall
embrittling gases, only those cylinders manufactured
be stripped. If the coating has been removed by the
or qualified as hydrogen cylinders shall be used for
application of heat, in no case shall the temperature
that service. It shall be checked that the cylinder is
of the cylinder have exceeded 300C.
compatible for hydrogen service, with respect to the
maximum tensile strength and internal surface 7.2 Inspection Procedure
condition.
The external surface of each cylinder shall be
6 DEPRESSURIZATION AND DEVALVING inspected for:
PROCEDURES
a) Dents, cuts, gouges, bulges, cracks,
All cylinders other than cylinders at manufacturerís laminations, or excessive base wear,
works shall be presumed to contain gas under b) Heat damage, plug or neck inserts or electric
pressure and the following precautions shall arc, suspicious marks, etc (see Table 3).
accordingly be observed.
c) Corrosion (see Table 4) - Special attention
6.1 The cylinder contents shall be released in a safe shall be given to areas where water may be

2
 IS 8451 : 2009

trapped. These include the entire base area, other non-destructing tests. Only when all doubts
the junction between the body and the foot are eliminated; may the cylinder be further processed
ring and the junction between the body and (see Annex C).
shroud,
10 INSPECTION OF CYLINDER NECK
d) Other defects such as illegible or incorrect,
unauthorized stamp marking, or unauthorized 10.1 Cylinder to Valve Threads
additions or modifications,
When the valve is removed, the cylinder to valve
e) Integrity of all permanent attachments (see C-2); threads shall be examined to identify the type of
and thread and to ensure that they are:
f) Vertical stability, if relevant (see C-2).
a) Clean and of full form,
For rejection criteria, see Annex C. Cylinders no b) Free of damages,
longer suitable for future service shall be rendered
c) Free of burrs,
unserviceable (see 15).
d) Free of cracks, and
8 CHECK OF INTERNAL CONDITION
e) Free of other imperfections.
Cylinders shall be inspected internally to complete
Cracks manifest themselves as lines that run
periodic and testing requirements. For cylinders
vertically down the thread and across the thread
being inspected by the ultrasonic method in lieu of
faces. They should not be confused with tap marks
the pressure test and when reference notches are
(thread machining stop marks). Special attention
used for calibration, the valve need not be removed.
should be paid to the bottom of the threads. In
Otherwise, each cylinder shall be inspected internally addition threads shall be checked by a GO, NO GO
using adequate illumination to identify any defects gauge.
similar to those listed in 7.2(a) and 7.2(c). Precaution
10.2 Other Neck Surfaces
shall be taken to ensure that the method of
illumination presents no risks to the tester while Other surfaces of the neck shall also be examined to
performing the operation. Any internal liner or ensure they are free of cracks or other defects (see
coating that may obstruct optimum visual inspection Annex C).
shall be removed. Any cylinder showing presence of
foreign matter or signs of more than light surface 10.3 Damaged Internal Neck Thread
corrosion shall be cleaned internally under closely Where necessary and where the manufacturer or the
controlled conditions by shot blasting, water jet competent design authority confirms that the design
abrasive cleaning, flailing, steam jet, hot water jet, of the neck permits, threads may be retapped or the
rumbling, chemical cleaning or other suitable method. thread type changed to provide the appropriate
The method used to clean the cylinder shall be number of effective threads. After retapping or
validated, controlled process. Care shall be taken all changing thread form, the threads shall be checked
times to avoid damaging the cylinder or removing with the appropriate thread gauge (see IS 9122).
excess amounts of cylinder wall (see Annex C). If
cleaning is required, the cylinder shall be re- 10.4 Neck Ring and Collar Attachment
inspected after the cleaning operation.
When a neck ring/collar is attached, an examination
For the cylinder of non-corrosive gases and < 0.5 shall be carried out to ensure that it is secure to
litre water capacity with an internal neck diameter inspect for thread damage. A neck ring shall only be
< 9 mm, alternative method may be substituted for changed using an appropriate procedure. If it is
the internal visual inspection. found that any significant damage to cylinder material
has occurred by replacement of the neck ring/collar,
This is: the cylinder shall be rendered unserviceable (see 15).
Looking for contamination, for example, rust from 11 PRESSURE TEST OR ULTRASONIC
the water used after the hydraulic test. If the rust EXAMINATION
contamination is observed in the hydraulic test fluid,
the cylinder shall be rendered unserviceable. 11.1 General

9 SUPPLEMENTARY TEST Each cylinder shall be subjected to hydraulic pressure

test. Alternatively ultrasonic examination may be
Where there is doubt concerning the type and/or considered subject to approval of statutory authority.
severity of a defect found on visual inspection,
WARNING ó Take appropriate measures to ensure safe
additional tests or methods of examination may be operation and to contain any energy that may be released
applied, ultrasonic techniques, check weighing, or during the hydraulic test. It should be noted that pneumatic

3
IS 8451 : 2009

pressure test requires more precautions than hydraulic in 11.4.3.2. It shall be serviced regularly in accordance
pressure tests since, regardless of the size of the container;
with the manufacturerís operating instructions to
any error in carrying out this test is highly likely to lead
to a rupture under gas pressure. Therefore these tests should ensure that its accuracy is maintained. Inspection
only be carried out after ensuring that the safety measures records and approval certificates for the equipment
satisfy the safety requirements. shall be maintained.
Each cylinder subjected to a hydraulic pressure test The operation of the test equipment shall be by
shall use a suitable fluid, normally water, as the test trained personnel and supervised by qualified and
medium. Hydraulic pressure test may be a proof experienced certified personnel.
pressure test or a volumetric expansion test as
appropriate to the design specification of the The inner and outer surface of any cylinder which is
cylinder. The hydraulic proof pressure test may be to be tested ultrasonically shall be in a condition
replaced by a pneumatic proof pressure test. Having suitable for an accurate and reproducible test.
decided to use one particular type of test, its results
For flaw detection the pulse echo system shall be
will be final. The test pressure shall be in accordance
used. For thickness measurement either the
with the stamp markings on the cylinder.
resonance method or the pulse echo system shall be
Once a cylinder has failed one of the above mentioned used. Either contact or immersion techniques of
tests, none of the other test methods shall be applied testing shall be used.
to approve the cylinder.
A coupling method which ensures adequate
11.2 Proof Pressure Test transmission of ultrasonic energy between the
testing probe and the cylinder shall be used.
The hydraulic pressure in the cylinder shall be
increased at a controlled rate until the test pressure, 11.4.3 Flaw Detection of the Cylindrical Parts
P h, is reached. The cylinder shall remain under
11.4.3.1 Procedure
pressure Ph for at least 30 s to establish that the
pressure does not fall and that there are no leaks. The cylinder to be inspected and the search unit shall
have a rotating motion and translation relative to
NOTE ó Any cylinder failing to comply with the
requirement of proof pressure test shall be rendered
one another such that a helical scan of the cylinder
unserviceable. will be described. The velocity of rotation and
translation shall be constant within ±10 percent. The
11.3 Hydraulic Volumetric Expansion Test pitch of the helix shall be less than the width covered
Annex E proposes a typical method for carrying out by the probe (at least 10 percent overlap shall be
the test and gives details for determining the guaranteed) and be related to the effective beam
volumetric expansion of seamless steel gas cylinder width such as to ensure 100 percent coverage at the
by the preferred water jacket method or the non- velocity of rotational movement and a translation
water jacket method. used during the calibration procedure.

The permanent volumetric expansion of the cylinder An alternative scanning method may be used for
expressed as a percentage of the total expansion at transverse defect detection in which the scanning
test pressure shall not exceed the percentage given or relative movement of the probes and the work
in the design specification or 10 percent whichever piece is longitudinal, the sweeping motion being such
is lower after the cylinder has been held at test as to ensure 100 percent surface coverage with about
pressure for a minimum period of 30 s. The cylinder 10 percent overlap of the seeps.
shall be rendered unserviceable. The cylinder wall shall be tested for longitudinal
11.4 Ultrasonic Examination defects with the ultrasonic energy transmitted in
both circumferential directions and for transverse
11.4.1 Scope defects in both longitudinal directions.
This is based on techniques used by cylinder For concave base cylinders where hydrogen
manufacturers. Other techniques of ultrasonic embrittlement or stress corrosion may occur, the
inspection may be used, provided these have been transition region between the cylindrical part and
demonstrated to be suitable for the manufacturing the cylinder base shall also be tested for transverse
method. defects in the directions of the base. For the area to
be considered (see Fig. 1). The ultrasonic sensitivity
11.4.2 General Requirements
shall be set at + 6 dB in order to improve the detection
The ultrasonic testing equipment shall be capable of of defects equivalent to 5 percent of the cylindrical
at least detecting the reference standard as described wall thickness in this thickened portion.

4
 IS 8451 : 2009

FIG. 1 BASE/W ALL TRANSITION REGION

In this case or when optional testing if carried out nominal depth (T). However, where this condition
on the transition area between the wall and neck cannot be met a maximum width of 1.0 mm is
and/or wall and base, this may be conducted acceptable.
manually, if not carried out automatically.
The depth of the notches (T) shall be (5 ± 0.75)
The effectiveness of the equipment shall be percent of the nominal wall thickness (S) with a
periodically checked by passing a reference standard minimum of 0.2 mm and a maximum of 1.0 mm, over
through the test procedure. This check shall be the full length of the notch. Run-out at each end is
carried out at least at the beginning and end of each permissible.
shift. If during this check the presence of the
appropriate reference notch is not detected then all The notch shall be sharp edged at its intersection
cylinders tested subsequent to the test acceptable with the surface of the cylinder wall. The cross-
check shall be retested after the equipment has been section of the notch shall be rectangular except where
reset. spark erosion machining methods are used; then it
is acknowledged that the bottom of the notch shall
11.4.3.2 Reference standard be rounded.
A reference standard of convenient length shall be 11.4.3.3 Calibration of equipment
prepared from a cylinder of similar diameter and wall
thickness range and from material with the same Using the reference standard described in 11.4.3.2,
acoustic characteristics (subjected to the same heat the equipment shall be adjusted to produce clearly
treatment) and surface finish as the cylinder to be identifiable indications from inner and outer surface
inspected. The reference standard shall be free from notches. The amplitude of the indications shall be
discontinuities which may interfere with the detection as near equal as possible. The indication of the
of the reference notches. smallest amplitude shall be used as the rejection level
and for setting visual, audible, recording or sorting
Reference notches, both longitudinal and devices. The equipment shall be calibrated with the
transverse, shall be machined on the outer and inner reference standard or probe, or both, moving in the
surface of the standard. The notches shall be same manner, in the same direction and at the same
separated such that each notch can be clearly speed as will be used during the inspection of the
identified. cylinder. All visual, audible, recording or sorting
devices shall operate satisfactorily at the test speed.
Dimensions and shape of notches are of crucial
importance for the adjustment of the equipment. 11.4.4 Wall Thickness Measurement
(see Fig. 2 and Fig. 3).
If the measurement of the wall thickness is not carried
The length of the notches (E) shall not be greater out in another stage of production, the cylindrical part
than 50 mm. shall be 100 percent examined to ensure that the
thickness is not less than the guaranteed minimum
The width (W) shall be not greater than twice the value.

5
IS 8451 : 2009

KEY
1 External Reference Notch
2 Internal Reference Notch
NOTE
T (5 ± 0.75) % S but 1 mm and 0.2 mm
W 2 T but if not possible then W 1 mm
E 50 mm

FIG. 2 SCHEMATIC REFERENCE N OTCHES FOR LONGITUDINAL D EFECTS

NOTE
T (5 ± 0.75) % S but 0.2 mm T 1 mm
W 2 T, but if not possible then W 1 mm
E 50 mm

FIG. 3 SCHEMATIC REFERENCE NOTCHES FOR C IRCUMFERENTIAL DEFECTS

6
 IS 8451 : 2009

11.4.5 Interpretation of Results 14.2 Revalving of the Cylinder

Cylinders with indications which are equal to or Before revalving the cylinder, the thread type shall
greater than the lowest of the indications from the be identified. The appropriate valve shall be fitted in
reference notches shall be withdrawn. Surface accordance with IS 3224/IS 3745 or to any other
defects may be removed; after removal the cylinders specification approved by the statutory authority.
shall be subjected to ultrasonic flow detection and Valving shall be done by a torque wrench at a torque
thickness measurement. prescribed by valve manufacturer.
Any cylinder which is shown to be below the 14.3 Check on Cylinder Tare Weight
guaranteed minimum wall thickness shall be rejected.
The tare weight of the cylinders shall be obtained by
11.4.6 Certification weighing on a scale calibrated with traceability to
national or international standards. The weigh scale
The ultrasonic testing shall be certified by the shall be checked for accuracy on a daily basis. The
cylinder manufacturer. capacity of weighing scale shall be suitable for the
Every cylinder, which has passed ultrasonic testing tare weight of the appropriate cylinders.
in accordance with this specification shall be stamp The tare shall include the mass of the cylinder,
marked with the symbol ‘UT’. valve(s) and all permanent fittings as it is presented
12 INSPECTION OF VALVES AND OTHER for fittings. If tare weight of the cylinder differs from
ACCESSORIES the stamped tare weight by more than the value
shown in Table 1 and is not due to reasons of
If valve or any other accessory is to be reintroduced damage, the original tare weight shall be cancelled.
into service, it shall be inspected and maintained to The new correct tare weight shall be marked in a
ensure that it will perform satisfactorily in service durable and legible fashion.
and meet the requirements of gas tightness from the
valve manufacturing standard, that is IS 3224. Table 1 Permissible Deviation in Tare Weight
Sl Cylinder Water Maximum
An example of suitable method is given in Annex F. No. Capacity (V) Permissible
l Deviation in
13 REPLACEMENT OF CYLINDRICAL PARTS Tare
Weight, g
Replacement of foot-rings and neck rings or the
(1) (2) (3)
grinding of cuts and other imperfection can be carried
out. i) 0.5 V < 5.0 ±50
ii) 5.0 V 20 ±200
All operations involving application of heat shall
iii) V>20 ±400
conform to the heat limits in 15.1.2. All corrosion
products shall be removed prior to repair. 14.4 Retest Marking
14 FINAL OPERATION 14.4.1 General
14.1 Drying, Cleaning and Painting After satisfactory completion of the periodic
inspection and tests, each cylinder shall be
14.1.1 Drying and Cleaning
permanently marked according to relevant standard
The interior of each cylinder shall be thoroughly or regulation, for example, IS 7285 (Part 2) with present
dried by a suitable method at a temperature not test date, followed by:
exceeding 300°C immediately after hydraulic pressure
‘The symbol of the inspection body or test
testing, so there is no trace of free water. The interior
station.’
of the cylinder shall be inspected to ensure that it is
dry and free from other contaminants. 14.4.2 Retest Date and Retester Symbol
14.1.2 Painting and Coating The retest date is the date of the present test, which
shall be indicated by the year and month. The retester
Cylinders are sometimes repainted using paints that
symbol is the symbol of the inspection body or test
require stoving. Plastic coating may also be
station.
reapplied. Paint or coating shall be applied so that
all markings stamped on the cylinder remain legible. 14.4.3 Stamping
In no case shall the temperature of the cylinder These marks shall be in accordance with the relevant
exceed 300°C since overheating could change the standard or regulation, for example, IS 7285 (Part 2).
mechanical properties of the cylinder.

7
IS 8451 : 2009

14.5 Reference to Next Test Date d) Date of original hydrostatic/hydrostatic

stretch test;
In accordance with the relevant regulations of an
authorized body and when regulations require, the e) Test reports and certificates furnished by the
next test date may be shown by an appropriate manufacturer, if available;
method such as by a disc fitted between the valve f) Test reports;
and the cylinder indicating the date (year and month) g) Maximum working pressure;
of the next periodic inspection and/or tests. Annex G
provides one example of an existing system for h) Water capacity;
indicating retest dates. Other systems are in use. j) Tare Weight;

14.6 Identification of Contents k) Variation, if any, in the tare weight marked on

the cylinder and actual tare weight;
Before the cylinder is reintroduced into service, the m) Condition of the cylinder shell;
intended contents shall be identified. This need not
be part of the periodic inspection and test procedure. n) Name of gas;
As an example, use IS 3933 or IS 4379 for colour p) Type of valve fitted;
coding. If painting is required, care shall be exercised q) Retesting date; and
in accordance with 14.1.2. If a change of gas service
r) Remarks, if any.
is involved, care shall be taken to follow the
requirement of relevant Indian Standard and as per 15 REJECTION AND RENDERING CYLINDER
Gas Cylinder Rules, 2004. UNSERVICEABLE
14.7 Records Any cylinder which fails to pass periodic examination
or test or which loses in its tare weight by over 5
Full record of cylinder examined and tested at any
percent or which for any other defect is found to be
testing station shall be maintained giving the
unsafe for use or after expiry of the service life of the
following particulars, namely:
cylinder, shall not be filled with any compressed gas
a) Name of the manufacturer and the owner of and shall be destroyed by flattening it as a whole or
the cylinder; after being cut into pieces in such a manner that the
b) Serial number; pieces cannot again be joined together by welding
or otherwise to form a cylinder, under intimation to
c) The specifications to which the cylinder the owner of the cylinder, as specified in IS 8198.
conforms;

ANNEX A
(Foreword)
INSPECTION PERIODS
A-1 The periodic inspection interval for gas cylinders containing different gases shall be as follows:
Name of Gas Chemical Symbol Periodical Inspection
of Gas Interval (in Years)
Acetylene, dissolved C2H2 (See Notes)
Air, compressed ó 5
Ammonia (anhydrous or dissolved) NH3 2
Argon Ar 5
Boron trichloride BCl3 2
Boron trifluoride (boron fluoride) BF3 2
Bromochlorodifluoromethane (R-12B1)1) CClF2Br 5
Bromotrifluoromethane (R-13B1) 1) CBrF3 5
Butadiene (vinylethylene, divinyl) C4H6 5
Butane C4H10 5
Butene C4H8 5

8
 IS 8451 : 2009

Name of Gas Chemical Symbol Periodical Inspection

of Gas Interval (in Years)
Carbogen (O2 = 95 percent, CO2 = 5 percent O2 + CO2 5
by weight)
Carbon dioxide CO2 5
Carbon monoxide CO 2
Chlorine Cl 2 2
Chlorine trifluoride ClF3 2
Chlorine pentafluoride ClF5 2
Chlorodifluoromethane (R-22) 1) CHClF2 5
2-Chlorotrifluoroethane (R-133a)1) CH2ClCF3 5
Chlorotrifluoroethane (R-1113)1) CClF = CF2 5
Chlorotrifluoromethane (R-13)1) CClF3 5
Coal gas (town gas, lighting gas) H2 + CO + CH4 2
Cyanogen (CN)2 2
Cyanogen chloride ClCN 2
Cyclopropane C3H6 5
Diborane (boroethane) B2H6 2
Dichlorodifluoromethane (R-12)1) CCl2F2 5
Dichlorofluoromethane (R-21) 1) CHCl2F 5
1.2 Dichlorotetrafluoroethane (R-114) 1) CClF2CClF2 5
1.1 Difluoroethane (R-152a)1) CH3CHF2 5
1.1 Difluoroethane (R-1132a) 1) CH2= CF2 5
Dimethylamine (CH3)2NH 5
Dimethyl ether (methyl ether, methyl oxide) (CH3)2O 5
Dimethylpropane C5H12 5
Ethane C2H6 5
Ethylamine (aminoethane) C2H5NH2 5
Ethyl chloride (chloroethane) C2H5Cl 5
Ethylene C2H4 5
Ethylene oxide C2H4O 2
Fluorine F2 2
Helium He 5
Hydrogen H2 5
Hydrogen bromide HBr 2
Hydrogen chloride HCl 2
Hydrogen cyanide HCN 2
Hydrogen fluoride HF 2
Hydrogen sulphide H2S 2
Isobutane CH(CH3)3 5
Isobutylene CH2= C(CH3)2 5
Krypton Kr 5
Liquefied petroleum gas (LPG) 2) ó 5
Methane CH4 5
Methanethiol (methylmercaptan) CH3SH 2
Methyl acetylene CH3C = CH 5

9
IS 8451 : 2009

Name of Gas Chemical Symbol Periodical Inspection

of Gas Interval (in Years)

Methylamine (amino methane) CH3NH2 2

Methyl bromide (bromomethane) CH3Br 2
Methyl chloride (chloromethane) CH3Cl 2
Methyl fluoride CH3F 5
Monochlorodifluoroethane (R-142b) 1) CH3CClF2 5
Monochlorotetrafluoroethane (R-124a) 1) CHF2ClCF2 5
Neon Ne 5
Nitrogen N2 5
Nitrogen peroxide (nitrogen dioxide) NO2 2
Nitrogen tetroxide (dinitrogen tetroxide) N2O4 2
Nitrosyl chloride NOCl 2
Nitrous oxide N2O 5
Nitrox ó 5
1)
Octafluorocyclobutane (R-C318) C4F8 5
Oil gas, compressed CO+CmHn 2
Oil gas, liquefied (Z ñ gas) CO+CmHn 2
Oxygen O2 5
Phosgene (carbonyl chloride) COCl2 2
Propane C3H8 5
Propene (propylene) C3H6 5
Sulphur dioxide SO2 2
Sulphur hexafluoride SF6 5
T-gas 28 10 percent CO2 + 90 percent C2H4O 2
T-gas 250 (cartox) 90 percent CO2 + 10 percent C2H4O 5
Trichlorofluoromethane (R-11)1) CCl3F 5
1.1.2 Trichlorotrifluoroethane (R-113)1) CCl2FCClF2 5
Trifluoromethane CHF3 5
Trifluoromonobromomethane CF3Br 5
Trimethylamine (CH3)3N 5
Vinyl bromide CH2= CHBr 5
Vinyl chloride CH2 = CHCl 5
Vinyl methylether (methylvinyl oxide) CH3OCH = CH2 2
Water gas H2 + CO 2
Xenon Xe 5
NOTES
1 Dissolved acetylene gas cylinders having monolithic porous mass shall be subjected to periodical inspection once in two
years and those having loose mass once in a year. It may be noted that dissolved acetylene gas cylinders are not subjected to
hydrostatic testing at the time of periodical inspection.
2 This list contains low pressure liquefiable gases, high pressure liquefiable gas and permanent gases.

1)
IS 10609.
2)
First periodic inspection after 10 years and thereafter every 5 years.

10
 IS 8451 : 2009

ANNEX B
(Foreword)
LIST OF GASES CORROSIVE TO CYLINDER MATERIAL
Gas Name Chemical Formula UN Class Subsidiary Risk
or Division
Boron trichloride BCl3 2.3 8
Boron trifluoride BF3 2.3 8
Chlorine Cl2 2.3 8
Dichlorosilane SiH2Cl2 2.3 2.1, 8
Fluorine F2 2.3 5.1, 8
Hydrogen bromide HBr 2.3 8
Hydrogen chloride HCl 2.3 8
Hydrogen cyanide HCN 6.1 3
Hydrogen fluoride HF 8 6.1
Hydrogen iodide HI 2.3 8
Methylbromide CH3Br (R40B1) 2.3
Nitric oxide NO 2.3 5.1, 8
Nitrogen dioxide N2O4 2.3 5.1, 8
Phosgene COCl2 2.3 8
Silicon tetrachloride SiCl4 8
Silicon tetrafluoride SiF4 2.3 8
Sulphur tetrafluoride SF4 2.3 8
Trichlorosilane SiHCl3 4.3 3,8
Tungsten hexafluoride WF6 2.3 8
Vinyl bromide CH2 : CHBr (R1140B1) 2.1
Vinyl chloride CH2 : CHCl (R1140) 2.1
Vinyl bromide C2H3F (R1141) 2.1
NOTES
1 These gases in a pure form are recognized to be potentially corrosive to low alloy steels.
2 Mixtures containing these gases may not be corrosive.

11
IS 8451 : 2009

ANNEX C
(Foreword; and Clauses 7.1, 7.2, 8, 9 and 10.2)
DESCRIPTION, EVALUATION OF DEFECTS AND CONDITIONS FOR REJECTION OF
SEAMLESS STEEL GAS CYLINDER AT TIME OF VISUAL INSPECTION

C-1 GENERAL have contained gases having special characteristics

may require modified controls.
Gas cylinder defects may be physical, material or due
to corrosion as a result of environmental or service Any defects in the form of a sharp notch may be
conditions to which the cylinders have been removed by grinding, machining or other approved
subjected during its life. methods. After such a repair, the wall thickness shall
be checked, for example, ultrasonically.
The object of this annexure is to give general
guidelines to gas cylinder users as to the application C-2 PHYSICAL OR MATERIAL DEFECTS
of rejection criteria.
Evaluation of physical or material defects shall be in
This annexure applies to all cylinders, but those that accordance with Table 3.

Table 3 Rejection Limits Relating to Physical and Material Defects in the Cylinder Shell
[Clauses 7.2(b) and C-2]
Sl No. Type of Defects Definition Rejection Limit in Accordance with Clause 7 1)
(1) (2) (3) (4)
i) Bulge Visible swelling of the cylinder All cylinders with such a defect

ii) Dent A depression in the cylinder When the depth of the dent exceeds 3 percent of the
that has neither penetrated nor external diameter of the cylinder
removed metal and is greater in or
depth than 1 percent of the outside when the diameter of the dent is less than 15 times
external diameter its depth

iii) Cut or gouge A sharp impression where metal When the depth of the cut or gouge exceed 10 percent
has been removed or redistributed of the wall thickness
and whose depth exceeds 5 percent or
of the cylinder wall thickness (see When the length exceeds 25 percent of the outside
Fig. 4) diameter of the cylinder
or
When the wall thickness is less than the minimum
design thickness
iv) Crack Split or a rift in the metal (see All cylinders with such defects
Fig. 5)
v) Damage Excessive general or localized All cylinders in categories (a) and (b)
heating of a cylinder usually
indicated by: All cylinders in categories (c) and (d) may be acceptable
a) partial melting of the cylinder after inspection and/or testing.
b) distortion of the cylinder
c) charring or burning of paint
d) fire damage to valve, melting
of plastic guard or data ring
or fusible plug, if fitted
vi) Plug or neck Additional inserts fitted in the All cylinders unless it can be clearly established that
inserts cylinder neck, base or wall addition is a part of approved design
vii) Stamping Marking by means of a metal All cylinders with illegible, modified or incorrect
punch markings
viii) Arc or torch Partial melting of the cylinder, All cylinders with such defects
burns the addition of weld metal or the
removal of metal by scarfing
or cratering
ix) Suspicious marks Marks introduced other than by All cylinders with such defects
the cylinder manufacturing process
and approved
x) Vertical stability ó Deviation from verticality which may present a risk
during service (especially if fitted with foot ring)
1)
When applying the rejection criteria given in this table, the conditions of use of the cylinders, the severity of the defects and
safety factors in the design shall be taken into consideration.

12
 IS 8451 : 2009

Permanent attachments (for example foot rings or in tabular form for all sizes and types of cylinders and
shrouds) shall be inspected and shall be suitable for their service conditions. The limits of rejection are
these intended purposes. usually established following considerable field
experience.
C-3 CORROSION
Extensive experience and judgement are required in
C-3.1 General evaluating whether cylinders that have corroded
The cylinder may be subjected to the environmental internally are safe and suitable for return to service. It is
conditions that could cause external corrosion of the important that the surface of the metal is clean of
metal. corrosion products prior to the inspection of the
cylinder.
Internal corrosion of the metal may also occur owing to
service conditions. C-3.2 Types of Corrosion

There is difficulty in presenting definite rejection limits The types of corrosion generally may be classified as
in Table 4.

Table 4 Rejection Criteria for Corrosion of the Cylinder Valve

(Clauses 7.2(c) and C-3.2)
Sl No. Type of Corrosion Definition Rejection Limit in Accordance with Clause 7 1)
(1) (2) (3) (4)
i) General corrosion Loss of wall thickness over an If the original surface of the metal is no longer
area of more than 20 percent of recognizable
either the interior or exterior total or
surface area of the cylinder If the depth of penetration exceeds 10 percent of the
(see Fig. 6) original thickness of wall
or
If the wall thickness is less than the minimum designed
wall thickness
ii) Local corrosion Loss of wall thickness over an If the depth of penetration exceeds 20 percent of the
area of less than 20 percent of original thickness of the cylinder wall
either the interior or exterior or
total surface area of the cylinder, If the wall thickness is less than the designed thickness 2)
except for the other types of local
corrosion described below
iii) Chain pitting or Corrosion forming, a narrow If a total length of corrosion in any direction exceeds
line corrosion longitudinal or circumferential the diameter of the cylinder and the depth exceeds 10
line or strip or isolated craters or percent of the original wall thickness2)
pits which are almost connected or
(see Fig. 7) If the wall thickness is less than the designed thickness2)
iv) Isolated pits Corrosion forming isolated If the diameter of the pits is greater than 5 mm, refer to
craters, without significant the ëlocal corrosioní row.
alignment (see Fig. 8) If the diameter of the pits is less than 5 mm, the latter,
the cylinder should be assessed as carefully as possible in
order to check that the remaining thickness of the wall
or base is adequate for the intended use of the cylinder
v) Crevice corrosion Corrosion associated with taking If, after thorough cleaning, the depth of penetration
place in, or immediate exceeds 20 percent of the original wall thickness
around, an aperture
1)
When applying the rejection criteria given in Table 3, the conditions of use of the cylinders, the severtity of the defects and safety
factors in the design shall be taken into consideration.
2)
If corrosion has reached limits of depth or extent, the remaining wall thickness shall be checked with an ultrasonic device. The
wall thickness may be less than the minimum design wall thickness, that is small (depth and extent) isolated pits (see Fig. 8), where
authorized by the relevant regulations taking into consideration the severity of the defect and safety factors.

13
IS 8451 : 2009

FIG. 4 CUT OR GROOVE

FIG. 5 CRACK

FIG. 6 GENERAL CORROSION

FIG. 7 CHANNEL (LINE) CORROSION

14
 IS 8451 : 2009

FIG. 8 ISOLATED PITS

ANNEX D
(Foreword)
(Informative)
PROCEDURE TO BE ADOPTED WHEN DEVALVING AND WHEN IT IS
SUSPECTED THAT A CYLINDER VALVE IS OBSTRUCTED

D-1 CHECK FOR OBSTRUCTED VALVE difference does not rule out the presence of a
gas under pressure.
The following procedures shall be carried out only
by trained personnel. In view of the potential of the D-2 VALVE UNOBSTRUCTED
hazards in cylinders, this operation can lead to injury
from stored energy release, fire and toxic hazards, Only when it is established that there is no
hence personnel can take such precautions as obstruction to gas flow in the cylinder valve, the
deemed necessary for the work to be performed. valve may be removed.
When the gas, if any, has been released and the D-3 VALVE OBSTRUCTED
pressure within the cylinder reduced to atmospheric
pressure, and, in the case of liquefied gases, when When a cylinder is found to have an obstructed gas
there is no frost or dew on the outside of the cylinder, passage in the valve, the cylinder shall be set aside
the valve may be removed after an additional check and handled by specially trained personnel in this
is made to establish that there is free passage through task as follows:
the valve. a) By sawing or drilling the valve body until
interception is made with the gas passage
As indicated in 6, a systematic check shall be made
between the valve body stem and valve body
to establish that the passage through the valve is
spindle seat. The operation shall be properly
unobstructed. The method adopted shall be a
cooled particularly when handling oxidizing
recognized procedure such as one of the following
gases; and
or one that provide equivalent safeguards:
b) By loosening or piercing the pressure relief
a) By introducing gas at a pressure up to 5 bar
device in a controlled manner.
and checking its discharge;
The preceding methods are applicable for cylinders
b) By using device shown in Fig. 9 to hand pump
of non-toxic, non-flammable and non-
air into the cylinder; and
chlorofluorocarbon (CFC) gases. Appropriate safety
c) For cylinder of liquefied gases, first check to precautions should be taken to ensure that no hazard
establish that the total weight of the cylinder results from the uncontrolled discharge of any
is the same as the tare stamped on the cylinder, residual gas.
if there is a positive difference, the cylinder
may contain either liquefied gas under Where the contents are toxic, flammable, oxidizing
pressure or contaminants. Lack of a positive or CFC, the preferred method is to partially unscrew

15
IS 8451 : 2009

KEY
1 Rubber tube (internal diameter 8 mm, external diameter 13 mm)
ground to olive shape and bonded
2 Tube (internal diameter 3 mm, external diameter 8 mm)
3 Rubber bulb
4 Bonded
5 Hand pressure

All dimensions in millimetres.

FIG. 9 TYPICAL DEVICE FOR DETECTING OBSTRUCTED CYLINDER VALVE

the valve within a glanded cap, secured and joined This procedure shall be performed in a controlled
to the cylinder and vented to a safe discharge. manner in such a way as to avoid personal injury.
The principals of a suitable device are illustrated in
Fig. 10.

16
 IS 8451 : 2009

KEY
1 Drive for devalving machine
2 Gas-tight gland
3 Gas-tight seal
4 Cylinder frame and clamping device
5 Pressure gauge
6 Vent valve
7 Direction of rotation
8 Gas disposal system

NOTE ó Operate remotely using devalving machine.

All dimensions in millimetres.

FIG. 10 TYPICAL D EVICE FOR THE REMOVAL OF A D AMAGED GAS CYLINDER VALVE

17
IS 8451 : 2009

ANNEX E
(Foreword; and Clause 11.3)
(Informative)

VOLUMETRIC EXPANSION TESTING OF GAS CYLINDERS

E-1 GENERAL the length of tube shall be such that its capacity
exceeds the total volumetric expansion of the cylinder
This annex describes methods for the hydrostatic under test. The diameter shall be uniform and
stretch testing of cylinders intended for the storage sufficiently small to permit an accurate reading of
and transport of compressed gases. Two methods, the expansion.
namely, water jacket method and non-jacket method,
have been covered. E-2.1.2 Pressure Gauge
E-2 WATER JACKET METHOD Two pressure gauges or a duplicate gauge shall be
used and shall be capable of reading to within one
E-2.1 Apparatus percent of the test pressure for pressures up to and
The arrangement of apparatus for the test may be of including 15 kgf/cm and within two percent for
the type indicated in Fig. 11. pressures above 15 kgf/cm.

E-2.1.1 Graduated Tube E-2.2 Procedure Before Testing

The graduated tube used for the measurement shall The water jacket shall be filled with water to a
be of such diameter that a permanent change in convenient level on the graduated glass tube. Also
volume of the cylinder of the order of 1/20 000 the arrangement for expelling entrapped from the water
total cylinder capacity may be readily observed. Also jacket shall be made.

FIG . 11 WATER JACKET METHOD

18
 IS 8451 : 2009

E-2.3 Precautions sufficiently small to permit an accurate reading of

the expansion.
Care shall be taken to prevent any leakage through
the joint between the cylinder neck and the water E-3.1.2 Pressure Gauge
jacket cover. Change of temperature of the water in
the jacket during the test shall be avoided. Two pressure gauges or a duplicate gauge shall be
used and shall be capable of reading to within one
E-2.4 Readings percent of the test pressure for pressure up to and
including 15kgf/cm and within two percent for
Reading of the water level in the graduated tube shall pressure above 15kgf/cm.
be taken:
E-3.2 Procedure Before Testing
a) before the test pressure has been applied to
the cylinder (C1), Before connections are made for testing, the cylinder
b) after the test pressure has been applied for 30 shall be completely filled with water and also
s (C2), and arrangement for expelling entrapped air from the
cylinder shall be made.
c) after the release of the test pressure (C3).
E-3.3 Connections
The difference between C1 and C2 represents the total
volumetric expansion and the difference between C1 All connections shall be air-free and water tight.
and C3 represents the permanent expansion.
E-3.4 Precautions
E-3 NON-JACKET METHOD
The water used shall be air free and the joints shall
E-3.1 Apparatus be leak proof as far as possible. However, if necessary,
care shall be taken to ensure that the quantity of
The arrangement of apparatus for the test may be of
water in the system is always constant by returning
the type indicated in Fig. 12.
any water leaking past the joints to the system.
E-3.1.1 Graduated Tube Piping shall be as short as possible and of as small a
volume as practicable. Pump shall be of sufficient
The graduated tube used for the measurement shall capacity to build the required pressure in a reasonable
be of such diameter that a permanent change in period of time.
volume of the cylinder of the order of 1/20 000 the
total cylinder capacity may be readily observed. Also E-3.5 Readings
the length of tube shall be such that its capacity
A reading (C1) of the water level in the graduated
exceeds the total volumetric expansion of the cylinder
tube shall be taken when the apparatus has been
under test. The diameter shall be uniform and

FIG. 12 NON-JACKET METHOD

19
IS 8451 : 2009

completely filled with air-free water and the valve to apparent total volumetric expansion calculated in this
the water supply has been closed. manner needs to be corrected by deducting an
amount equal to 4.12  10 -5 PV, where P is the test
E-3.5.1 After the test pressure has been applied for pressure in kgf/cm and V is the volume of water
30 s, a second reading (C2) of the water level shall be under compression in cm. The difference between
taken. A final reading (C3) shall be taken after removal C 1 and C 3 represents the permanent volumetric
of the internal pressure by opening the release valve. expansion without the necessity of correcting for
E-3.5.2 The difference between C1 and C2 represents the compressibility of water.
the total volumetric expansion. However, the

ANNEX F
(Foreword; and Clause 12)
INSPECTION AND MAINTENANCE OF VALVESAND THEIR JUNCTIONS ó
RECOMMENDED PROCEDURES

F-1 All threads shall be checked to ensure that the thread where necessary.
diameters, form, length, and taper are satisfactory.
Where the use of lubricants/elastomers is permitted,
If threads show sign of distortion, deformation or only those approved for the gas service shall be used,
burring, these faults shall be rectified. Excessive thread particularly for oxidizing gas service.
damage or the serious deformation of the valve body,
handwheel, spindle or other components is the cause After the valve has been reassembled, it shall be checked
for replacement. for correct operation and shall undergo internal and
external leak checks at intended operating pressure. This
Maintenance of the valve shall include general cleaning may be done prior to the valve being refitted to the
together with replacement of elastomers and worn or cylinder or during and after the first gas change
damaged components, packing and safety devices, subsequent to the inspection and test of the cylinder.

20
 IS 8451 : 2009

ANNEX G
(Clause 14.5)
TEST DATE RINGS FOR GAS CYLINDERS

Year Colour Shape

(1) (2) (3)
2000 Aluminium Circle
2001 Red Hexagon
2002 Blue Hexagon
2003 Yellow Hexagon
2004 Green Hexagon
2005 Black Hexagon
2006 Aluminium Hexagon

2007 Red Square

2008 Blue Square
2009 Yellow Square
2010 Green Square
2011 Black Square
2012 Aluminium Square

2013 Red Circle

2014 Blue Circle
2015 Yellow Circle
2016 Green Circle
2017 Black Circle
2018 Aluminium Circle

2019 Red Hexagon

2020 Blue Hexagon
2021 Yellow Hexagon
2022 Green Hexagon
2023 Black Hexagon
2024 Aluminium Hexagon
NOTES
1 Colour and shape of test date ring on cylinders to be tested during the year indicated in column.
2 The sequence of colour and shape of test date rings is to be repeated on an 18-year cycle. Hence 2018 is a repeal of 2000.

21
IS 8451 : 2009

ANNEX H
(Foreword)
COMMITTEE COMPOSITION
Gas Cylinders Sectional Committee, MED 16

Organization Representative(s)

Petroleum and Explosive Safety Organization, Nagpur SHRI M. ANBUNATHAN (Chairman)

SHRI C. R. SURENDRANATHAN (Alternate)

All India Industrial Gases Manufacturers Association, New Delhi SHRI SIDDARTH A. PATEL
SHRI S. DEB (Alternate)

Bharat Petroleum Corporation Ltd, Mumbai SHRI THARIYAN GEORGE

SHRI SANJAY PHULLI (Alternate)

Bharat Pumps and Compressors Ltd, Allahabad SHRI J. P. SINHA

SHRI P. G. CHOUDHURY (Alternate)

BOC India Ltd, Kolkata SHRI K. MANOHARAN

SHRI RAMANA VUTUKURU (Alternate)

Everest Kanto Cylinder Ltd, Mumbai SHRI A. K. PARIKH

SHRI P. M. SAMVATSAR (Alternate)

Hindustan Petroleum Corporation Ltd, Mumbai SHRI K. SRINIVAS

SHRI ALOK KUMAR GUPTA (Alternate)

Indian Oil Corporation Ltd, Mumbai SHRI S. S. SAMANT

SHRI RAJESH HAZARNIS (Alternate)

International Industrial Gases Ltd, Kolkata SHRI DEVENDRA K. GARG

SHRI NIKHILESh K. GARG (Alternate)

Kabsons Gas Equipments Ltd, Hyderabad SHRI SATISH KABRA

SHRI S. GOPAL AIAH (Alternate)

Kosan Industries Ltd, Mumbai/Surat SHRI S. K. DEY (Surat)

SHRI S. B. BOMAL (Alternate)

LPG Equipment Research Centre, Bangalore SHRI G. P. GUPTA

Mahanagar Gas Limited, Mumbai SHRI RAJESH PRABHU

SHRI SUSHIL PATIL (Alternate)

Maruti Koatsu Cylinders Ltd, Mumbai SHRI NITIN J. THAKKAR

SHRI A. S. SARAN (Alternate)

Ministry of Defence (DGQA), Pune COL M. S. KATTI

LT-COL RAVI KUMAR (Alternate)

Praxair India Ltd, Bangalore SHRI MILAN SARKAR

SHRI ARINDAM DAS (Alternate)

Research & Development Establishment (Engineers), Pune SHRI P. K. CHATTOPADHYAY

SHRI A. BASU (Alternate)

Sakha Engineers Pvt Ltd, New Delhi SHRI AMARJIT S. KOHLI

SICGIL India Ltd, Chennai SHRI FAROOQUE DADABHOY

SHRI R. PADMANABAN (Alternate)

Steel Authority of India Ltd, Salem/Delhi SHRI T. KALYANASUNDARAM

SHRI N. K. VIJAYAVARGIA (Alternate)

Supreme Cylinders Ltd, Delhi SHRI M. L. FATHEPURIA

Tekno Valves, Kolkata SHRI Y. K. BEHANI

SHRI R. BEHANI (Alternate)

22
 IS 8451 : 2009

Organization Representative(s)

Trans Valves (India) Pvt Ltd, Hyderabad SHRI A. K. JAIN

SHRI ANUJ JAIN (Alternate)

Vanaz Engineers Ltd, Pune SHRI S. K. KHANDEKAR

SHRI S. R. SARVATE (Alternate)

In personal capacity (Menon & Patel, 14/1, Mile, SHRI EBRAHIM M. PATEL
Mathura Road, Faridabad)

In personal capacity (303, Shantikunj, Pandav SHRI L. D. THAKKAR

Bunglows Lane Athwalines, Surat)

BIS Directorate General Scientist ëFí & Head (MED)

[Representing Director General (Ex-officio)]

Member Secretary
SHRI C. K. VEDA
SCIENTIST ëFí & HEAD (MED), BIS

Dissolved Acetylene Cylinders, Generators, Acetylene Pipe Lines and High Pressure
Gas Cylinders Subcommittee, MED 16 : 3
Petroleum and Explosive Safety Organization, Nagpur SHRI C. R. SURENDRANATHAN (Convener)
SHRI V. B. BORGAONKAR (Alternate)

Al-Can Exports Pvt Ltd, Dist Thane SHRI VIJAY K. PARIKH

SHRI D. C. DAVE (Alternate)

All India Industrial Gases Manufacturers Association, New Delhi SHRI SIDDARTH A. PATEL
SHRI S. DEB (Alternate)

Bharat Pumps and Compressors Ltd, Allahabad SHRI J. P. SINHA

SHRI P. G. CHOUDHURY (Alternate)

BOC India Ltd, Kolkata SHRI P. K. BHATTACHARYA

SHRI D. MUKHERJEE (Alternate)

Everest Kanto Cylinder Ltd, Mumbai SHRI A. K. PARIKH

SHRI P. M. SAMVATSAR (Alternate)

Hindalco Industries Limited, Mumbai SHRI SUBHANKAR GUPTA

SHRI S. DEVADOSS (Alternate)

International Industrial Gases Ltd, Howrah SHRI DEVENDRA K. GARG

SHRI NIKHILESH GARG (Alternate)

Jai Maruti Gas Cylinders Gases Ltd, Gwalior SHRI ASHOK K. NIGAM
SHRI VAISHNAV NIGAM (Alternate)

Klas Technology Ventures Ltd, Bangalore SHRI K. G. KRISHNAMURTHY

SHRI K. J. KULKARNI (Alternate)

KVK Corporation, Mumbai SHRI R. CHANDGOTHIA

SHRI V. CHANDGOTHIA (Alternate)

Mahanagar Gas Limited, Mumbai SHRI RAJESH PRABHU

SHRI SUSHIL PATIL (Alternate)

Maruti Koatsu Cylinders Ltd, Mumbai SHRI NITIN J. THAKKAR

SHRI A. S. SARAN (Alternate)

23
IS 8451 : 2009

Organization Representative(s)
Ministry of Defence (DGQA), Pune COL M. S. KATTI
LT-COL RAVI KUMAR (Alternate)

Praxair India Ltd, Bangalore SHRI MILAN SARKAR

SHRI ARINDAM DAS (Alternate)

Rama Cylinders Pvt Ltd, Mumbai SHRI SANJAY R. NAPHADE

SHRI SANJAY S. MANDE (Alternate)

SICGIL India Ltd, Chennai SHRI RUQSHAD DADABHOY

SHRI R. PADMANABAN (Alternate)

Strategic Engineering (P) Ltd, Chennai DR M. RAMAKRISHNA

SHRI G. S. VISWANATH (Alternate)

Techno Valves, Kolkata SHRI Y. K. BEHANI

SHRI R. BEHANI (Alternate)

24
Bureau of Indian Standards

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development of the activities of standardization, marking and quality certification of goods and attending to
connected matters in the country.

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BIS has the copyright of all its publications. No part of these publications may be reproduced in any form without
the prior permission in writing of BIS. This does not preclude the free use, in course of implementing the standard,
of necessary details, such as symbols and sizes, type or grade designations. Enquiries relating to copyright be
addressed to the Director (Publications), BIS.

Review of Indian Standards

Amendments are issued to standards as the need arises on the basis of comments. Standards are also reviewed
periodically; a standard along with amendments is reaffirmed when such review indicates that no changes are
needed; if the review indicates that changes are needed, it is taken up for revision. Users of Indian Standards
should ascertain that they are in possession of the latest amendments or edition by referring to the latest issue of
ëBIS Catalogueí and ëStandards: Monthly Additionsí.

This Indian Standard has been developed from Doc No.: MED 16 (0947).

Amendments Issued Since Publication

______________________________________________________________________________________
Amendment No. Date of Issue Text Affected
______________________________________________________________________________________
______________________________________________________________________________________
______________________________________________________________________________________
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Headquarters:
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2609285
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K.G. Computers, Ashok Vihar, Delhi
 AMENDMENT NO. 1 MAY 2013
TO
IS 8451 : 2009 PERIODIC INSPECTION AND TESTING OF
HIGH PRESSURE GAS CYLINDERS — CODE OF
PRACTICE
(Page 9, Informal table) — Insert the following after coal gas (town gas,
lighting gas):

Name of Gas Chemical Symbol of Periodical Inspection

Gas Interval (in Years)
Compressed Natural gas – 3
(CNG)

(Page 10, Informal table, Note 2) — Insert the following new note:

‘3 Cylinders for compressed natural gas shall be subjected to both pressure test and ultrasonic
examination as per 11. The ultrasonic examination shall be done after the hydraulic proof pressure
test.’

(MED 16)

Reprography Unit, BIS, New Delhi, India