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

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. 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.

B 07/02/2017 K.D.Yun S.Y.Kwak S.J.Park FOR APPROVAL

Rev Date Prepared Checked Approved Details of Revision

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

Date (DD.MM.YY

YY)

Prepared 07/02/2017 K.D.Yun

METHOD STATEMENT FOR AIR BLOWING OF BOP PIPING

KKS Code

ZEN

040360

Approved 07/02/2017 S.J.Park

Rev.

B

Dept Mechanical Dep’t

10 Pages

1 PURPOSE ……… ……… 3

2 SCOPE……… … 3

3 RESPONSIBILITY……… ….…… 3

4 WORK PROCEDURE……….……… 4

5 SAFETY PRECAUTION……… ….………… 4

6 ATTACHMENTS ………… …….… … ….… 7

1.0 PURPOSE

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.

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.

3.1 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

4.0 WORK PROCEDURE

4.1 General Requirements

a 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.

b Check the installation accordingly and the pipeline system as well.

c Temporary piping is necessary for air blowing process.

d hydrostatic water to be drained before air blowing.

e orifice plates, flow meter elements, filter internals, control valve internals,

blinds to be removed before blowing.

f 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.

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 non-related 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.

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

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

JOB SAFETY ANALYSIS List of All Job

A Workers

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

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

B Transportation

of equipment &

materials

B Crash/ traffic accident 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

A Heavy

Lifting

Works

C Crushing may cause fatal injury or permanent disability

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

B Unloading

Equipment

and

Materials

D.1 Struck down by things and materials

D.2 Squeezed by the sling

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

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.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

E Equipment and

material

preparation for

Temp facilities

E.1 Collision between machines

Overturning may cause death or permanent

disability

E.2 Unnecessary movements of equipments towards a person that causes injury

and damage to materials

E.3 Equipment oil leakage during operation

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 Job

Operation

During Night

Time.

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

F.2 Generator (Diesel) equipment oil leakage

F.3 Oil chemical storage

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.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

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

G Welding and

cutting works

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

permanent disability

G.2 Generator(diesel) equipment oil leakage during operation

G.3 Oil/chemical storage

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.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

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

H Working in

confined spaces

H.1 Fire, Explosion Asphyxiation, Entrapment

H.2 Uncontrolled Access to confined spaces

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 Smoke test I 1 Pressure leaking during testing 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