Method Statêmnt for air blowing of BOP piping (rev b)

FOR APPROVAL

B
A

07/02/2017
05/10/2016

K.D.Yun
K.D.Yun

S.Y.Kwak
S.Y.Kwak

S.J.Park
S.J.Park

FOR APPROVAL
FOR APPROVAL

Date

Prepared

Checked

Approved

Details of Revision

Rev

Owner

VIETNAM ELECTRICITY
Owner’s Engineer
POWER ENGINEERING CONSULTING JSCOMPANY 3

Contractor

Sub-Supplier
LILAMA CORPORATION/LILAMA18 JSC
Project
VINH TAN 4 THERMAL POWER PLANT

Project Code
VT4
UAS Code
DD09

Prepared
Checked

Date
(DD.MM.YY
YY)

Name

07/02/2017

K.D.Yun

07/02/2017

Approved 07/02/2017
Dept.

Unit Code

S.Y.Kwak
S.J.Park

Title

P0

KKS Code
ZEN

METHOD STATEMENT FOR
AIR BLOWING OF
BOP PIPING

Mechanical Dep’t

Document No. VT4-DD09-P0ZEN-040360

Reg. No.

040360
Rev.

B
Page-No.
10 Pages


EVNGENCO3/VTTPMB
DMPP Consortium

Vinh Tan 4 Thermal Power Project

CONTENTS

ITEMS

1.0

PAGE

1.

PURPOSE …………………………….................………………..3

2.

SCOPE………………………………………….......................…..3

3.

RESPONSIBILITY………............................................….……..3

4.

WORK PROCEDURE……….……………………………….........4

5.

SAFETY PRECAUTION………............................….…………...4

6.

ATTACHMENTS..………….........................…….…..…...….…..7

PURPOSE

DOC.NO. VT4-DD09-P0ZEN-040360

Rev.B

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DMPP Consortium

Vinh Tan 4 Thermal Power Project

This method statement describes the activities and secure the quality for air blowing is to
clean the piping of BOP piping of Vinh Tan 4 (2x600MW) Thermal Power Plan Project.

2.0

SCOPE

This method statement applied exclusively for the air blowing of BOP piping
(Steam, Water, Oil, Air…) in Vinh Tan 4 (2x600MW) Thermal Power Plan Project.
3.0

RESPONSIBILITY

3.1 Site Manager
Responsible for overall management of all construction activities at site.
3.2 Construction Manager
Responsible for coordination and management of all erection activities at site and
coordination with Doosan lift sub-construction.
3.3 Construction Engineer
Responsible for site construction activities and implementation of quality and HSE plans
during construction. Also responsible for coordination and management of all
equipments related activities at site and with Doosan.
3.4 QA/QC Manager
Responsible for all QAQC activities of the project. He shall to interact with QAQC Manager of
Doosan related to all mechanical QAQC activities. He is responsible for non-conformance
activities and quality audits for internal and external.
3.5 QA/QC Inspectors
Responsible for site QAQC activities , coordination with Doosan for all equipment and
structural inspection activities.
3.6 HSE Manager / Safety Officer
HSE Manager takes responsibility of all HSE activities at site. Safety officer shall ensure
that work is carried out in safe manner and also ensure that tool box talks, pre talk HSE
meetings are conducted by concerned supervisors and shall ensure proper mode of
communication in case of emergency. Ensure personnel adhere to method

statementfulfilled

DOC.NO. VT4-DD09-P0ZEN-040360

Rev.B

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EVNGENCO3/VTTPMB
DMPP Consortium

Vinh Tan 4 Thermal Power Project

WORK PROCEDURE

4.0

4.1 General Requirements
a.
b.
c.
d.
e.
f.

Install temporary equipment (e.g. I/A Header, Air Receiving Tank, Drycant, Air
Receiving Tank) on the pipeline as appropriate with a temporary piping or hose.
Check the installation accordingly and the pipeline system as well.
Temporary piping is necessary for air blowing process.

hydrostatic water to be drained before air blowing.
orifice plates, flow meter elements, filter internals, control valve internals,
blinds to be removed before blowing.
All instrumentation and any safety valves to be isolated before blowing

4.2 Air Blowing Process
4.2.1 After installation of the temporary equipment on the pipeline system to be
tested, make sure that all valves on the pipeline are closed.
4.2.2 Open the valve nearest to the air header and start air blowing.
4.2.3 Using a clean paper, place it on the opening of the open valve and check for
the quality of air blowing until it finally no residue, debris or other foreign
materials mark on the clean paper.
4.2.4 If the quality of air is totally cleaned, closed the first tested valve and open
the next valve on the same pipeline system nearest to the air header.
4.2.5 Following item 4.2.3, continuous air blowing will be done until the air
quality becomes clean.
Note: No time limit required in air blowing, it will be only stop as long as the
quality of air is already cleaned.
4.2.6 After completion of air blowing on the second valve nearest to the air header,
follow the next valve again nearest to the air header and same step will be done on
this valve (item 4.2.3)
4.2.7 Continue this steps until all the valves are totally air blown with a good /
clean air quality.
4.a.8 After finished air blowing, drained pipe shall be capped for safety.

DOC.NO. VT4-DD09-P0ZEN-040360

Rev.B

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EVNGENCO3/VTTPMB
DMPP Consortium

Vinh Tan 4 Thermal Power Project

depending on the piping system to choose the method of air blowing
4.3 Acceptance Criteria
a. Air Blows - In an effort to remove debris resulting from fabrication, storage, and
installation, sites should perform air blows on system piping during the installation
process. The piping should be blown down during initial fit-up and prior to final
installation. The air used for the blows can either be instrument air or clean dry air
from an off-base air compressor. After the pipe is installed, any open ends should be
capped using a suitable FME cover. This procedure can be applied to nearly any
system during the fit-up phase of installation as a useful precautionary measure.
b. Maintenance Practices - Cleanliness controls in maintenance practices are
critical in preventing system contamination. The use of FME covers on system/pipe
openings, good housekeeping/clean work areas (free of debris from related or nonrelated work) and visual inspections cannot be overstated.
c. Visual Inspections - Visual inspections are essential to ensuring that foreign
material is not introduced into or left in the system. All piping and system openings
should be inspected prior to final installation/closeout.
5.0 Safety Precaution
Air blowing & leak testing can be dangerous and should be performed with caution
and careful attention to all safety procedures. To ensure the safety of all workers and
residents, the following safety precautions must be completed prior to conduct the
this activities;
a) Notify station personnel of area to be avoided due to potential risk during air
blowing .
b) Ensure that no high pressure testing occur in the work centers.

c) Mark off the area as a dangerous site if necessary and ensure only individuals
associated with the activities are in the area.
DOC.NO. VT4-DD09-P0ZEN-040360

Rev.B

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DMPP Consortium

Vinh Tan 4 Thermal Power Project

5.1 Responsibilities and Instructions
a. PM/EHS Officer shall ensure that all work is undertaken in accordance with the
specified work scope;
b. Safety training should be conducted to all personnel assigned at site prior to
commence any work;
c. All personnel should know the locations of fire extinguishers, communications,
manual alarms & ESD point;
d. All personnel should be aware of assembly points, escape routes, emergency
contact numbers;
e. Carry-out daily tool box and safety talks;
f. Personal Protective Equipment (PPE) shall be worn at all times;
g. Good housekeeping shall be observed in work areas;
h. Construction wastes shall be segregated and disposed to an approved dump
yard area;
i. Keep non-essential workers clear of machinery whilst it is in operation;
j. Proper inspection of all equipments prior to use to avoid leakage and equipment

failure;
k. Permit to work shall be obtained appropriately for the type of work and location;
l. All vehicles must comply and observed speed limit of 10 km/h on site;
m. Excavation and delivery of materials are prohibited during heavy rains;
n. Adequate lighting equipments when working night time;
o. Ensure all workers and equipments working overtime are properly accounted and
obtained permit/approval from Doosan EHS Manager prior to carry-on works.
Regular working time is from 6:30 am ~ 5:00 pm;
p. Periodic refresher trainings, tool box talk and audit shall be conducted.
5.2

Safety ( PPE )

q. Safety Helmets
r. Gloves
s. Safety Goggles
DOC.NO. VT4-DD09-P0ZEN-040360

Rev.B

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Vinh Tan 4 Thermal Power Project

t. Dust Mask
u. Reflective Vest

v. Others: Depend on each special work the proper PPE shall be equipped for the
workers before work.
5.3

First Aid Facilities

w. First aid facility is always made available during working hours by a qualified first
aider.
x. Ambulance car with Driver, Helper and stand by Nurse are available at site at all
times.
6.0 ATTACHMENT
- JSA for BOP piping
- marked up P&ID

DOC.NO. VT4-DD09-P0ZEN-040360

Rev.B

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EVNGENCO3/VTTPMB
DMPP Consortium

Vinh Tan 4 Thermal Power Project

JOB SAFETY ANALYSIS
List of All Job
Steps
A. Workers

B. Transportation
of equipment &
delivery
of
materials

A.

Heavy
Lifting
Works

B.

Unloading
Equipment
and
Materials

List of All Known Hazards

A.1 Not properly equipped with PPE "A.2
Worker abnormal physical condition
(drunken & fatigue)

B. Crash/ traffic accident

A.1 Instructing to wear proper PPE
A.2 Make the worker to take enough rest

B.1 Check the access road before passing the area
B.2 Designate a signalman who wear the red suit and safety helmet and
control the work

C. Crushing may cause fatal injury or
permanent disability

D.1 Struck down by things and materials

D.2 Squeezed by the sling

C.1 Preparation of a rigging lift list and plans for lifts of ten (10) tons
or greater.
C.2 Only a qualified and Certified operators. Signalman should be
n-place
C.3 Do not stand beneath the lifting areas
C.4 Ensure loads are fixed with sling belt correctly
C.5 All lifting equipment must be in good conditions
C.6 Experienced lifting supervisor at all times
C.7 Only monthly checking color attached lifting tools allowed to use
C.8 All lifting tools must have identification tag (including serial number,
certification number, SWL inspection date and due date)
C.9 Provide safe entrance and exit access road for the labors passing
D.1.a Make sure the sling is tied/binded/tightened correctly
D.1.b Check the lifting devices(slings, shackles, etc…) for proper and
safe use
D.1.c Analyzing the load (wight, shape, lifting points, etc…) and the
lifting device
D.1.d Only monthly checking color attached lifting tools allowed to use

D.1.e All lifting tools must have identification tag (including serial
number, certification number, SWL inspection date and due date)
D.1.f Provide safe entrance amd exit access road for the labors
passing
D.2.a Use hand gloves when tightening the slings
D.2.b Tightening the slings before carrying-out lifting

D.3 Squeezed by the materials
D.4 Crane fall accidentally

DOC.NO. VT4-DD09-P0ZEN-040360

How to Eliminate Hazards

D.3.a Use wooden bar as support of the materials on the ground
D.4.a Analyzing the loads (weight, shape, lifting points, etc…) and lifting
device to suit the crane capacity

Rev.B

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EVNGENCO3/VTTPMB
DMPP Consortium

E. Equipment and
material
preparation for
Temp. facilities

Vinh Tan 4 Thermal Power Project

E.1
Collision
between
Overturning may cause
permanent
disability

E.2
Unnecessary
movements
of
equipments towards a person that causes
injury
and damage to materials

E.3 Equipment
operation

List of All Job
Steps
F.

Working
Operation
During
Night
Time.

machines.
death or

oil

leakage

during

E.1.a Always keep the site clear of any obstructions.
E.1.b Tool-box talks on a daily basis
E.1.c Adequate warning signboards
E.1.d Checklist on all vehicles must be provided everyday.
E.2.a Designate a signalman who wear the red suit and safety helmet
and control the work
E.2.b Heavy machinery should have backward movement warning
light and beacon
E.2.c Equipment used to clear the site should be controlled and sorted
by a banksman
E.2.d Provide safe entrance and exit for the workers going to the area
E.2.e All vehicles entering on the site must turn-on their headlights day
and night time
E.3.a Daily check of the equipment prior to work

List of All Known Hazards
F.1 Working operation of the equipment
may cause injury to personnel due to
poor visibility of the area.

How to Eliminate Hazards
F.1.a Must provide sufficient lightening on the entire working area
F.1.b All equipment must ensure all lights are operational and not
obscured by dirt or mud
F.1.c Supervisor must always be present for the entire working
operation
F.1.d All workers must be wearing proper PPE
F.1.e Ambulance and nurse must be available in first aid station
F.1.f Must use and connect 3 core codes electric wire and separate
distribution panel (must pass arrangement of ELCB) and avoid any
water affect
F.1.g Provide safe entrance and exit access road for the labors passing
F.1.h All kinds of electric cable must be hanged over ground
F.1.i Must use industrial socket and plug
F.1.j Electric cabinet should not affect any water

F.2 Generator (Diesel) equipment oil
leakage

F.3. Diesel/chemical shall be stored in secondary containment &
MSDS requirement shall be communicated with all concerned

F.3 Oil chemical storage

DOC.NO. VT4-DD09-P0ZEN-040360

F.2.a Daily check of the equipment prior to start of work
F.2.b Regular check & monitoring of the equipment prior to use
F.2.c Provide secondary containment protection under the equipment
to prevent contamination of soil by oil spillage

Rev.B

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DMPP Consortium

G. Welding and
cutting works

Vinh Tan 4 Thermal Power Project

G.1 Electric shock, fire, burn to body and
injury to eye may cause death or
permanent disability

G.1.a Proper earthing and connection of welding machines and
generators
G.1.b Fashback arrestor and gauge should be installed prior to use
cutting cylinders
G.1.c Proper PPE to be worn at all times
G.1.d Must use and connect 3 core codes electric wire and separate
distribution panel (must pass arrangement of ELCB) and avoid
any water affect
G.1.e All kinds of electric cable must be hanged over ground
G.1.f Must use industrial socket and plug
G.1.g Electric cabinet should not affect any water

G.2 Generator(diesel) equipment
leakage during operation

G.2.a Daily check of the equipment prior to start of work
G.2.b Regular monitoring of the equipment in order to control and
prevent oil leakage and other engine trouble
G.2.c Provide secondary containment protection under the equipment
to prevent contamination of the soil by oil spillage
G.2.d If oil leakage, must remove the oil and contaminated soil
immediately

oil

G.3 Oil/chemical storage
H. Working in
confined spaces

H.1 Fire,
Entrapment

Explosion

G.3 Diesel/chemical shall be stored in secondary containment
Asphyxiation,

H.2 Uncontrolled Access to confined
spaces
I. Smoke test

I. 1 Pressure leaking during testing

DOC.NO. VT4-DD09-P0ZEN-040360

Rev.B

H.1.a A correct PPE worn
H.1.b Proper ventilation system should be arranged
H.1.c Atmospheric monitoring used to monitor environment
H.1.d Only competent persons authorized to work
H.2.a a permit to work
H.2.b Tool box meetings
H.2.c Strict control of confined space entry access
I.1 Make sure that all the end and joints are plugged or closed
I.2 Make sure that the air vent are closed
I.3 Check the pump pressure according to the requirement needed
I.4 Put barricade and warning sign on the hydrostatic test area

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