Project Name: xxx RA Ref No.: xxx RA compilation Date: Review date: Date: Compiled by: Reviewed by: Approved by: Overall Task Details Hydrostatic pressure testing of pipework inside buildings Relevant Applicable MAS: • Additional Training required: NOC’s Required for task: RISK SCORE CALCULATOR Use the Risk Score Calculator to Determine the Level of Risk of each Hazard What would be the CONSEQUENCE of an occurrence be? What is the LIKELIHOOD of an occurrence? Hierarchy of Controls Frequent/Almost certain (5) Continuous or will happen frequently Often (4) 6 to 12 times a year Likely (3) 1 to 5 times a year Possible (2) Once every 5 years Rarely (1) Less than once every 5 years Can the hazard be Eliminated or removed from the work place? Catastrophic (5) Multiple Fatalities High 25 High 20 High 15 Medium 10 Medium 5 Can the product or process be substituted for a less hazardous alternative? Serious (4) Class 1 single fatality High 20 High 16 High 12 Medium 8 Low 4 Can the hazard be engineered away with guards or barriers? Moderate (3) Class2 (AWI or LTI) or Class 1 Permanently disabling effects High 15 High 12 Medium 9 Medium 6 Low 3 Can Administration Controls be adopted I.e. procedures, job rotation etc. Minor (2) Medical attention needed, no work restrictions. MTI Medium10 Medium 8 Medium 6 Low 4 Low 2 Can Personal Protective Equipment & Clothing be worn to safe guard against hazards? Insignificant (1) FAI Medium10 Medium 4 Low 3 Low 2 Low 1 No Specific Task Step (In sequence of works) Hazard Details Consequence/Risk Initial Risk Rating Control Measures Residual Risks Additional Control Measures RR L C RR 1 Pressure testing equipment • Use at high pressure; • Rupture/failure of pump during testing; • Valve/connection failure; • Instrument failure resulting in system over-pressurization; 3 3 9 MED i. The supervisor in charge of the test shall ensure that all pressure testing gauges etc. are in good sound condition, undamaged, correctly dated with the current valid calibration and that appropriate calibration certificates are available; ii. All pumps shall be in sound condition and complete with a valid test certificate. Any vulnerable items such as manometers and pressure switches shall be removed or isolated from the system prior to testing if not required; iii. The test supervisor shall carry out a thorough inspection of the system before requesting the permit detailed above to ensure that all isolations, blanks and other specified safety devices are in place before testing commences; No test documentation available Quarantine equipment until valid documentation provided Low 2 Permit to work system • Interaction of personnel and high pressure system; • Injury due to uncontrolled testing; • Injury due to failure to ensure adequate pre-checks undertaken; 3 4 12 HIGH i. All pressure testing operations shall require a Permit to Work to ensure that no pressure testing will be allowed to commence until all,

1. HEALTH SAFETY AND ENVIRONMENT Author: Approved:
RISK ASSESSMENT: ACT/HSE/RA 001 HYDROSTATIC PRESSURE TESTING INSIDE BUILDINGS
Issued: Rev. Date:
Revision: 0
Page 1 of 3 HSEQ -Rev-01(Jan-2023)
No
Specific Task Step
(In sequence of
works)
Hazard Details Consequence/Risk
Initial Risk
Rating Control Measures Residual Risks
Additional Control
Measures
RR
L C RR
1 Pressure testing
equipment
 Use at high
pressure;
 Rupture/failure of pump during
testing;
 Valve/connection failure;
 Instrument failure resulting in system
over-pressurization;
3 3
9
MED
i. The supervisor in charge of the test shall ensure that all pressure testing
gauges etc. are in good sound condition, undamaged, correctly dated with
the current valid calibration and that appropriate calibration certificates are
available;
ii. All pumps shall be in sound condition and complete with a valid test
certificate. Any vulnerable items such as manometers and pressure
switches shall be removed or isolated from the system prior to testing if
not required;
iii. The test supervisor shall carry out a thorough inspection of the system
before requesting the permit detailed above to ensure that all isolations,
blanks and other specified safety devices are in place before testing
commences;
No test
documentation
available
Quarantine equipment until
valid documentation provided
Low
2 Permit to work system
 Interaction of
personnel and high
pressure system;
 Injury due to uncontrolled testing;
 Injury due to failure to ensure
adequate pre-checks undertaken;
3 4
12
HIGH
i. All pressure testing operations shall require a Permit to Work to ensure
that no pressure testing will be allowed to commence until all, or
applicable, considerations have been considered;
ii. The Permit shall be completed and distributed at least 2 hours in advance
of the pressure test.
iii. The test area shall be physically walked by the Engineer with all required
checks completed. If any rectifications are required these must be
completed before the test is allowed to commence.
iv. The responsible Permit Holder shall also ensure that the safe work
practices permit and all other requirements outlined on the Work Permit
are strictly adhered to during the task being performed.
v. Hazardous work to be carried out under the Permit to Work must have risk
assessment / JSEA conducted prior to issue and shall be attached with
schematic drawing and the pre-inspection form (if required) to the PTW on
request. Any additional or specific control measures must also be
indicated in the Work Permit.
vi. The Work Permit shall also be available at the Work Area;
vii. Where practicable, implement a Lock out/Tag out procedure to ensure no
lines are pressurized or valves opened/closed until all safety procedures
are in place and relevant parties informed.
Permit not in area
Regular checks during test.
Briefed at TBT’s;
Low
Project Name: xxx
RA Ref No.: xxx
RA compilation
Date:
Review date:
Date:
Compiled by:
Reviewed by:
Approved by:
Overall Task Details
Hydrostatic pressure testing of pipework inside buildings
Relevant Applicable MAS:

Additional Training required: NOC’s Required for task:
RISK SCORE CALCULATOR
Use the Risk Score Calculator to Determine the Level of Risk of each Hazard
What would be the
CONSEQUENCE
of an occurrence be?
What is the LIKELIHOOD of an occurrence? Hierarchy of Controls
Frequent/Almost certain (5)
Continuous or will happen
frequently
Often (4)
6 to 12 times a year
Likely (3)
1 to 5 times a year
Possible (2)
Once every 5 years
Rarely (1)
Less than once every 5
years
Can the hazard be Eliminated or removed
from the work place?
Catastrophic (5)
Multiple Fatalities
High 25 High 20 High 15 Medium 10 Medium 5
Can the product or process be substituted for
a less hazardous alternative?
Serious (4)
Class 1 single fatality
High 20 High 16 High 12 Medium 8 Low 4
Can the hazard be engineered away with
guards or barriers?
Moderate (3)
Class2 (AWI or LTI) or Class 1
Permanently disabling effects
High 15 High 12 Medium 9 Medium 6 Low 3
Can Administration Controls be adopted
I.e. procedures, job rotation etc.
Minor (2)
Medical attention needed, no work
restrictions. MTI
Medium10 Medium 8 Medium 6 Low 4 Low 2 Can Personal Protective Equipment &
Clothing be worn to safe guard against
hazards?
Insignificant (1)
FAI
Medium10 Medium 4 Low 3 Low 2 Low 1

2. HEALTH SAFETY AND ENVIRONMENT Author: Approved:
RISK ASSESSMENT: ACT/HSE/RA 001 HYDROSTATIC PRESSURE TESTING INSIDE BUILDINGS
Issued: Rev. Date:
Revision: 0
Page 2 of 3 HSEQ -Rev-01(Jan-2023)
No
Specific Task Step
(In sequence of
works)
Hazard Details Consequence/Risk
Initial Risk
Rating Control Measures Residual Risks
Additional Control
Measures
RR
L C RR
3
Establishing exclusion
zones
 Personnel in area
 Unauthorized access to test area;
 Workers struck by flying materials;
 Worker struck by High pressure water
release;
3 4
12
HIGH
i. The establishment of an exclusion zone(s), (this zone shall be
dependent on the positioning, pressure, test zone and personnel in
adjacent area) from the pressure source, around the test area shall be
undertaken;
ii. Simple barrier tape is not an adequate control of any area where
personnel are present and shall only be used on doorways etc., if a
sentry is to be present at all times to control access;
iii. If practicable, the area may be securely closed off using plywood,
handrail or similar to prevent unauthorized access. The board/rails shall
be securely fixed with suitable signage attached;
iv. Any doors shall, if practicable, be locked with keys retained by the permit
holder;
v. In areas where other contractors are working or other exposed areas,
the use of sentries shall be considered to prevent access, however this
shall be determined by the locality and nature of the test. The sentries
shall be instructed as to emergency contact details etc. and shall remain
in position for the duration of the test;
vi. All flange and valve connections, blank ends or clip connections etc.
shall be zoned off as a matter of general good practice;
vii. All drain or vent points must be fitted with a blanking plug. Any other
areas shall be secured as applicable;
viii. Under no circumstances will any persons be allowed within safety
barriers during pressure testing.
Unable to secure
area during
normal working
hours
Test undertaken out of normal
work shift timings, weekends
etc.
Low
4 Signage to test area  Personnel in area
 Unauthorized access to test area;
 Inadequate signage to test area; 3 4
12
HIGH
i. The exclusion zone shall be clearly marked with suitable signage,
including ‘Warning – Pressure Test’, and emergency contact details;
ii. Signs will be of adequate size and in languages as applicable (minimum
English and Arabic) and shall include the test date;
iii. Simple paper signs are not to be used, as these can blow away or torn
off. Signs shall be fixed onto hard backing and secured to handrails etc.;
iv. On completion of the test all signage shall be removed to prevent
confusion.
Workers not
understanding
signage
Communicated at Induction Low
5 Pressure testing
 High pressure to
pipework;
 Uncontrolled Stored Energy release;
 Rupture/failure in Pipe lines during
testing;
 Valve/connection failure;
 Instrument failure resulting in system
over-pressurization;
 End caps/plugs ejecting under high
pressure;
 Weld/seal/fitting failure, flying objects;
 High pressure water/air injection.
3 4
12
HIGH
i. The initial pressurizing of a system has the potentially highest risk of
failure and sudden release of pressure, possibly resulting in serious
injury;
ii. High pressure testing on systems shall be reached in clearly defined and
controlled stages;
iii. If required as part of the design, on completion of each stage and after a
period of stabilization an inspection of the test area shall be completed
by the responsible person and his team, checking for leaks etc.;
iv. All pressure test details shall be recorded throughout the entire test
schedule;
v. The personnel carrying out the test must be provided with a safe place
from which the progress of the test can be observed and controlled;
Low
6 Emergency procedures  High pressure to
pipework;
 Emergency procedures not briefed
to task workers;
 Poor response in the event of an
emergency;
3 4
12
HIGH
Emergency procedures shall be developed for the pressure test, to be
specific to the area/zone. These shall include:
i. Emergency Contact details;
ii. Persons responsible for shutting down the system;
iii. Actions to be taken in an emergency, escape routes;
iv. Means of communication between parties;
v. First aid response;
Low

3. HEALTH SAFETY AND ENVIRONMENT Author: Approved:
RISK ASSESSMENT: ACT/HSE/RA 001 HYDROSTATIC PRESSURE TESTING INSIDE BUILDINGS
Issued: Rev. Date:
Revision: 0
Page 3 of 3 HSEQ -Rev-01(Jan-2023)
No
Specific Task Step
(In sequence of
works)
Hazard Details Consequence/Risk
Initial Risk
Rating Control Measures Residual Risks
Additional Control
Measures
RR
L C RR
These will communicated to all personnel involved in the tests.
7
Re-testing in the event
of failure
 Re-testing with high
pressure
 Injury due to uncontrolled testing;
 Worker injury due to working on
pressurized system;
 Injury due to failure to ensure
adequate pre-checks undertaken;
3 4
12
HIGH
i. If on pressurization any leaks are found in the system, the system shall
be depressurized and leaks repaired as required.
ii. Under no circumstances will personnel work on any pressurized systems
unless the leaking section can be successfully isolated by valves and
can be depressurized safely;
iii. A valve lock out/tag out system shall be adopted in these circumstances
on the closed valves to prevent unauthorized opening;
iv. No unauthorized personnel will be allowed in any test area until
depressurization is complete. Only when leaks have been repaired and
control checks undertaken will the system be re-pressurized following
the same procedure as previous;
v. After full pressure has been achieved another inspection is to be
completed;
vi. If the leak was due to a weld failure or a fixing/valve failure then the
causation must be determined and other welds/fixings/valves with
possible similar defects investigated before a retest is undertaken;
Low