SCHOOL OF CHEMICAL AND BIOMEDICAL ENGINEERING

(Division of Chemical & Biomolecular Engineering)

Nanyang Technological University

Report on

Industrial Attachment

With

Air Liquide Industrial Gas Pte Ltd (SOXAL)

Prepared by : Eng Kah Hoe

Matriculation Number : U1323053H

Email Address : ENGK0006@e.ntu.edu.sg

Company Supervisor : Mr Leo Lai Ji Hau

NTU Mentor : Prof. Raymond

Table of contents

Abstract ………………………………………………………………………………………………….3

Acknowledgement ……………………………………………………………………………………….4

List of Figures and Graph………………………………………………..................................................5

1. Introduction…………………………………………………………………………………………….6

1.1Industrial Attachment …………………………………………………………………………6

1.2 Learning Objective……………………………………………………………………………6

2. Company Profile ………………………………………………………………………………………6

2.1 Background and Organization of Air Liquide ……………………………………………..…7

2.2 System Semiconductor Manufacturing Co. Pte Ltd……………………………………………7

3. Key Assignments……………………………………………………………………………………….8

3.1 UPOX Plant Studying and Improvement………………………………………………………8

3.1.1 Background …………………………………………………………………………….8

3.1.2 Objective …………………………………………………………………………….…9

3.1.3 Methodology ……………………………………………………………………………9

3.1.4 Findings and Improvements …………………………………………………………..10

3.1.5 Learning Outcomes …………………………………………………………………...10

3.2 International Organization of Standardization (ISO) …………………………………………11

3.2.1 Background ……………………………………………………………………………..11

3.2.2 Objective ……………………………………………………………………………….11

3.2.3 Methodology …………………………………………………………………………..11

3.2.4 Findings and Improvements ……………………………………………………………12

3.2.5 Learning Outcomes ……………………………………………………………….…….12

4. Routine Tasks ………………………………………………………………………………………12-14

5. Ad – Hoc Tasks ………………………………………………………………………………..…..….14

5.1 Technical Works ………………………………………………………………………….……..15

5.2 Non-Technical Works …………………………………………………………………….……..16

6. Experience toward Industrial Attachment …………………………………………………………..17

7. Conclusion …………………………………………………………………………………….……18

Abstract

The purpose of this report was to illustrate and elaborate on my internship and give readers a better

understanding on my 5 months internship provided by Air Liquide Industrial Gas Company from

11st January 2016 until 28th May 2016. A brief introduction of the company and the electronic gas

operation (EGO) department were provided to enable readers have better knowledge on the

company profile. My routine tasks and the key assignments also the ad hoc tasks would be shared

in this report to allow the readers have better perspectives on my role as a Process Engineer Intern

in Electronic Gas Operation Department (EGO). Throughout these 5 months internship fulfilled

with the tasks and assignments allocated by the Engineer, I undoubtedly had gained valuable

experience such as learned few plants process operation knowledge, working in a team oriented

environment and troubleshooting the operation problem also the effective communication in the

working place. My internship experience with Air Liquide Industrial Gas Company has been

fruitful and full of excitements and challenging which will be prepared me for my future career as

a Process Engineer in near future.

Acknowledgement

I would like to express my gratitude to Air Liquide Industrial Gaseous Pte.Ltd for offering me the

opportunity to work and experience as a Process Engineer Intern under the operation department

in Electronic Gas Operation (EGO) of SSMC tank farm.

First of all, I would like to thank Professor Raymond Lau for his guidance and mentorship

throughout these 20 – weeks of Industrial attachment Programme. I would like to show my

appreciation and gratitude to my supervisor Mr Leo Lai Ji Hau for giving me the chance to work

under SSMC tank farm operational field and his supportive help and guidance throughout the

internship programme.

Besides that, I would like to thanks Mr Gerard Oh William and Chen Cifu the SSMC tank Farm

engineers for their time and patience in introducing the related unit operation and answering all

my doubts on process throughout the internship programme. In additional, I would like to express

my gratitude towards all the engineers from other department and also technicians namely, Mr Tan

Chee Yong, Mr Allan, Mr Arun, Mr Yak Yong Long, Mr Kamil and Mr Foo for their guidance

and support. They are approachable and their willingness to share their knowledge and teach me

the concept and technical skill on process operation despite their busy schedule.

Moreover, I would like to thanks Ms Michelle Niam, Ms Selina ans all the colleagues in Electronic

Gas Operation for their assistance on logistics and administrative stuffs. Last but not least, I want

to thank my fellow buddy interns namely Jarrell, Toh Ying Ying, Lee Hui Ting, Elizabeth, Jing

Qi and Ann for making the internship memorable with their company and support.

1. Introduction

1.1 Industrial Attachment

Industrial attachment is a learning process in which students get to experience the real

engineering life under the supervision of work place professionals. The objectives of this

industrial attachment are to supplement NTU’s in-house practical professional training and

to instill in the students the right work attitudes and professionalism so that they could

become effective and productive to the respective organization much sooner than is usual

for the fresh graduates. Then students can link their knowledge to practice at the same time

gain new knowledge from work place. The industrial attachment is a learning process by

providing students with exposure to real life team oriented working environment as part of

the academic curriculum that helps in development of technical skills, personal,

professional communication skills, and discipline and team work competencies. The

significant of this internship programme is the self – directed learning approach by the

student due to the diversity of attachment environment and background of the organization

supervisors.

1.2 Learning Objectives

In the end of the industrial attachment, I would like to:

Gain better understanding on the roles and responsibilities as a Process

Engineer in operating plant sites.

To understand the existing plant operation and process and also the existing

procedures.

Identify the gaps and recommend new procedures required for coming new

plant

To set up best operation and quality procedure that improve productivity, plant

reliability, quality and safety.

2. Company Profile

2.1 Background and Organization of Air Liquide Company

Air Liquide – a leading entity in today’s industrial and medical gas industry was

establish in 1902 in France. Air Liquide was recognizing the need for a reliable gas

producer to support the burgeoning Far East economy in early 20th century. Air Liquide

had established Far East Oxygen in Singapore in 1911 to meet the rising need of

industrial gaseous. From years to years as Singapore grew, so did the demand for

gaseous. The upward industries augmented the need to develop a wider supply chain

which giving the rise to the formation of Singapore Oxygen Air Liquide Pte Ltd

(SOXAL) in 1975 as a joint venture between Far East Oxygen and Singapore Oxygen.

SOXAL had operated in 21 locations around Singapore, consisting of 4 subsidiaries

and joint venture companies, making it the largest gas provider in the region.

Going to where our customers are, our plants are strategically located near industrial

sectors to ensure proximity and relevance. For the larger users, SOXAL has specifically

designed onsite plants installed at the customer’s premises. With the largest liquid

storage in Singapore, the backup storage facilities also ensure a constant and continuity

supply to their customers in order to prevent business downtime. SOXAL had come a

long way since partnering with diverse industry companies to support the Singapore

economy through a unique blend of advanced equipment, processes and systems

supported by a highly engaged and competent workforce.

Today, SOXAL is Truly Air Liquide anew, celebrating a return to Air Liquide family

as wholly owned subsidiary. With this, SOXAL is geared to stay ahead, leveraging on

Air Liquide’s expertise and experience as one of the earliest pioneers of the gas industry

to deliver even greater value, leading-edge technology and revolutionary innovations

to their customers.

The business of Air Liquide is diversified and covers almost every aspect of the

industrial gaseous including production, pipeline network distribution, marketing, and

special gaseous manufacturing. Shown below Figure 1

Figure 1: Air Liquide Organization Chart

2.2 System on Silicon Manufacturing Company Pte Ltd (SSMC)

Tank Farm

System on Silicon Co. Pte. Ltd. (SSMC) is a semiconductor fabrication company

located in Paris Ris Wafer Fab Park. It was incorporated in 1999 and is a joint venture

between NXP Semiconductors and Taiwan Semiconductor Manufacturing Company

(TSMC). The core business of SSMC as a CMOS silicon foundry is wafer fabrication

and providing exclusive foundry to their partners. SSMC offered 0.25 micron - 0.14

micron with derivatives and embedded flash CMOS manufacturing process. Key

device features include dual gate oxide, low leakage, high speed, low power, mixed

mode and embedded flash. Various options are available for each of these nodes, for

example polyimide coating for stress relief, thick top metal for power and high

resistivity substrate for noise suppression and RF applications. SSMC offers advanced

Air Liquide Pte Ltd

Health Safety Environment and

Quality (HSEQ)

Finance/IT/Purchasing

Human Resource (HR)

Engineering Project and Solutions

Legal

Core Business

Large Industries (LI)

Electronic Gas Operation

(EGO)

Industrial Merchant (IM)

Healthcare

wafer fabrication capabilities ranging from 0.11 micron to 0.14 micron technology

nodes. It wide portfolio of silicon proven derivatives and options are capable of

handling diverse characteristics and requirements by today’s customers.

One of the key elements that SSMC required in the wafer fabrication manufacturing

process is the industrial gaseous. Since Air Liquide is the global industrial gaseous

supplier hence Air Liquide had built up its own tank farm with all the required

equipment in the SSMC’s premises. For Air Liquide wise, SSMC is considered one of

the customers whereby Air Liquide duty is to supply SSMC industrial gaseous such as

Helium (PHe), Hydrogen (PH2), different types of nitrogen (PN2, UN2, and GN2),

Ultra-Pure Oxygen (UPO) and compressed dry air (CDA). This tank farm was built

inside the customer’s premises is to make sure continuous supply of the industrial

gaseous to customer.

Overall, there have two plant process operations in SOXAL-SSMC tank farm, such

operations are Teisan Compact Nitrogen plant (TCN) and Ultra-Pure Oxygen Plant

(UPOX). The TCN plant main purpose is to produce three purities of nitrogen such as

processed nitrogen (PN2), Un-processed nitrogen (UN2) and Gross nitrogen (GN2),

while UPOX plant is to produce ultra-pure oxygen. Besides that, SOXAL also

supplied bulk gaseous such as Helium, Hydrogen and Argon to SSMC whereby these

bulk gaseous are not synthesis in SOXAL-SSMC tank farm instead these gaseous are

came from other SOXAL tank farm from Jurong Island.

3. Key Assignments

3.1 Ultra-Pure Oxygen Plant (UPOX) Studying and

Improvement

3.1.1 Background

The overall process operation of the UPOX plant was to produce ultra-pure oxygen

which had a very high purity. The produced ultra-pure oxygen (O2) has a lot of major

daily usages beside respiration purpose. For example one of the usages of this ultra-

pure oxygen is the industries use gas for cutting, welding and melting of metals. This

highly pure oxygen capable of generating temperatures up to 3000’C which enable

melt, soft and slice the metals into the wanted dimensions or shapes. There are several

processes take place in this UPOX plant such as re-boiling, compressing, cooling,

rectification, distillation and filtration in order to obtain the ultra-pure liquid oxygen.

The produced ultra-pure oxygen will be stored in a buffer tank for supplying to

customers. However before supply to customers, this pure oxygen will be undergoing

further purifying by purifiers then proceed to few analyzers to analyze to make sure the

purity of the gas is within the range of qualification. After these two steps then the

oxygen gas can be fully supplied to customers.

Figure 2: UPOX Operation Process

3.1.2 Aim

The aim of this assignment was to study the process operation of the UPOX plant

thoroughly in term of process and efficiency. Then after study the whole process need to

follow up by updating the standard operating procedure (SOP) and also the suggested

improvements.

3.1.3 Methodology

To have a better understanding of the UPOX plant, we need to have basic knowledge on

the chemical and physical properties of the oxygen (O2) and nitrogen (N2) in both liquid

and gaseous state. This is because each gaseous have its own densities, boiling and melting

points also different type of gaseous has different expansion coefficient which affect the

rate of expansion from liquid state to gaseous state. Hence, this concept too applies to both

oxygen and nitrogen. In order to obtain the ultra-pure oxygen (UPOX) nitrogen gas is

required during the process. The reason nitrogen gas required is because the process needed

the differences of temperatures between the nitrogen and oxygen for further distillation and

filtration to achieve the purity of 99.999999% ultra-pure oxygen.

UPOX plant consists of components such as compressor, supply tank (mother tank),

column, condenser, exchanger and reboiler. Each equipment has its own specific process

that combined together to work the whole process operation. Firstly the liquid oxygen will

flow to column to undergo rectification process to separate out methane then this removed

methane liquid oxygen will be evaporated inside reboiler by gas nitrogen to further

Liquid

Oxygen

Re-boiling, Cooling

and Drying Processes

Distillation and

Rectification

Nitrogen Gas

Ultra-Pure

Oxygen

distillate and get rid of unwanted hydrocarbon. Re-boiling is a process where use the

temperature difference and pressure difference among nitrogen and oxygen to achieve

distillation process to separate impurity from oxygen. These evaporated gas oxygen will

then condense inside heat exchanger reform liquid oxygen again and go through another

rectification process in a column to remove Argon. Further evaporating and condensation

of the liquid oxygen finally form the ultra-pure liquid oxygen and store in a storage tank

for supply.

Throughout the whole process of the UPOX operation, parameters such as pressure, flow

rate and temperature are needed to take care of for obtaining desired productivity and purity.

Then the UPOX process also had been implied into a designed stimulation model for

monitoring of the operation. By using this simulation model all the parameters related to

the UPOX process can be controlled effectively and achieve optimized productivity.

3.1.4 Findings and Improvement

After studied and understanding the process and how to operate of UPOX plant thoroughly,

certain defects related to the process had found then corrective action including the

improvements toward the defects had been done. In term of documentation, few Standard

Operating Procedures (SOP) based on processes regarding to the UPOX plant had been

created and updated. Such SOP were:

(i) Deriming For UPOX Plant

(ii) Regeneration For Liquid Oxygen Filter

The purposed of SOP is used as a reference or guideline for engineer or technician when

dueling with UPOX plant. As a result, it is important to always keep the SOP in the latest

revision.

Then on-site wise, some changes had been made regarding to the UPOX plant. All the

pipelines and the related valves had undergone checking and maintenance in term of

labelling, functionality, sensitivity, auto-controlling and transmitting to make sure all of

them still in qualified performance.

Moreover, after had done some changes of the on-site UPOX plant regarding to piping and

valves then of course must update all the related documents. Thus, the PID diagram of

UPOX plant had been updated to the latest version based on the improvement that had done

for example name of the labels, position of the valves and also the tag numbers of the

components in the system. This enable us to trace the line and equipment on – site

especially during maintenance.

3.1.5 Learning Outcome

Through the course of studying and working on this assignment, firstly I had learnt the

process of synthesis the ultra-pure liquid oxygen from raw materials. I was able to applied

knowledge that I gained during my school such as distillation, re-boiling, rectification and

cooling in learning and understanding the plant operation. Then I had learnt the importance

of process stimulation in controlling the task of optimizing the process unit. The process

stimulation model enabled me to have better understanding and have a chance to practice

on this stimulation model design which interlink to the actual process. This will be

facilitated me in my final year project which involves the use of stimulation software.

3.2 International Organization for

Standardization (ISO) Preparation

3.2.1 Background

International Organization for Standardization (ISO) is an independent, non-

governmental organization. It is the world’s largest developer of voluntary

international standard and facilitates world trade by providing common

standards between nations. Thousand standards had been set covering

everything from manufactured products and technology to food safety,

agriculture and healthcare. The use of this standards aids in the creation of

products and services that were safe, reliable and of good quality. The ISO

helped businesses increased productivity while minimizing errors and waste.

By enabling products from different markets to be directly compared, they

facilitated companies in entering new markets and assist in the development of

global trade on a fair basis. The standards also serve to safeguard consumers

and the end users of products and services which ensuring that certified product

conform to the minimum standards set internationally.

3.2.2 Aim

The objective of this assignment is to understand the importance of

documentations for a company to always maintain the standard of the products

and the role of an engineer in maintaining the quality of the services and

products.

3.2.3 Methodology

International Organization of Standardization (ISO) is a certification based on

the quality of our products for customers. Our company must always make sure

our latest standards policies are applied and practiced in every sectors and

departments. There are specific standards of ISO, these are:

(i) ISO 9000: Quality Management System (QMS)

(ii) ISO 14001: Environmental Management System (EMS)

(iii) ISO 18001: Occupational Health and Safety Management (OSHA)

Each ISO had its very own and specific requirements that needed to fulfill in

order to keep our company up to global standard and build the expectation and

more importantly the trust of our customers.

For this assignment, I was required to have a general information on our

company Air Liquide in term of organization structure, legal policies,

documentations and implementation of latest policies and later on I needed to

link all these information up together and make its practical.

3.2.4 Findings and Improvement

Throughout the review and trance of our department ISOs, I had found some

gaps that had deviated from latest requirements of company’s policies. These

gaps were:

(i) Lost track of certain documents

(ii) Outdated Standard Operating Procedures (SOP) on some process and

operation

(iii) Documentation in term of storing and updating

After reviewing and pondering all these gaps with my supervisor and

engineer, we had discussed and provoked ways to resolve all these gaps which

to maintain our high quality and standard. In the end, the outdated documents

and SOP had been updated and started to keep in good shape so that these

documents could be found and traced when needed. Then with all these

updated documents and latest policies we had passed the external audit by

external company.

3.2.5 Learning Outcome

Through the course of working on this project, I came to realize the importance

of documentation in preserving the quality of company’s services and products.

The specified ISO such as 9001, 14001 and 18001 enabled me to get a better

understanding on the quality management, environment management and

health safety management for the operation of the company.

This project also allows me to learn and have a better perceptive on the

responsibilities as an engineer to nurture the qualities of a company.

4. Routine Task

4.1 Unit Monitoring

One of the fundamental task as a Process Engineer intern was process monitoring

activities. The activities includes updating daily, weekly and monthly monitoring files

such as data collecting from operating processes, purity of gaseous and monitoring

spreadsheet.

4.1.1 Daily Purity Data Monitoring

OCAP form was a report that required submit to customer (SSMC) based on

the data trend that the designed stimulation model based on analyzers, APIX

that had recorded throughout the entire operation.

As known, some processes in electronics required gaseous of extremely purity

and to guarantee such purity, Air Liquide had an unparalleled solution on

offering analyzer APIX for analyzing gaseous at part per billion (ppb) levels.

APIX is an analyzer machine with its own automatic sampling and calibration

system that used to monitor the concentration of several key impurities

simultaneously in more vector gaseous. Air Liquide supplied industrial gaseous

such as Argon (PAr), Helium (PHe), Hydrogen (PH2), Oxygen (O2) and

Nitrogen (N2) for SSMC. However, each gaseous were required to be purified

and analyzed by both purifiers and analyzers to determine the impurities within

the gaseous before can supply to SSMC. So the analyzers played crucial role in

analyzing and generating the purity data for all the gaseous. This was to

maintain the high standard of supplying.

Objectives of OCAP Form:

(a) To maintain the high quality and purity of all the supplied gaseous to

SSMC

(b) Act as a discussion forum between Air Liquide and SSMC to discuss on

the actions required to take when the purities were out of the range.

(c) To troubleshooting any incidents regarding to the purity of the gaseous.

4.1.2 Calibration of Analyzers

The main role of analyzer was to analyze and determine the purity of gaseous

before supplied to SSMC. There had specific analyzers to analyze specific

impurities contained inside the gaseous. For example,

(i) Servomax Analyzer: determine the CO2 in nitrogen gas

(ii) Toray Analyzer: analyze amount of CO content of gaseous

(iii) Gow Mac: determine the amount of Argon, Methane and Nitrogen

content inside the oxygen gas

(iv) Meeco Analyzer: analyzed the moisture (water) content of gaseous

Therefore it clearly showcase the important of these analyzers in industrial gas

Supply Company. To keep the high quality and standard of the supplied

industrial gaseous to SSMC, we were required to make sure the purities of all

the gaseous analyzed by all the analyzers within the range of the impurities. The

unit used for measuring the impurity was in Part per Billion (ppb) which was

highly pure gaseous supplied.

For the information, the data of the impurities analyzed by the analyzers would

be deviated from the quality range as requested due to over period of performing.

As a result, all the analyzers were required to carry out calibration based on

calibration period of each analyzers such as weekly, monthly or fortnightly. The

method of performing the calibration is using the two points calibrate where we

used the lowest and maximum set values and do the interpolation to obtain a

linear line so if the values obtain is fall in the line mean the purity is acceptable.

The purpose of carrying out calibration for analyzers was to re-adjust the

performance of the analyzers within the range to make sure that the equipment

perform at required capacity. Throughout the internship, I was able to learn the

concept of the calibration and the method to carry out the calibration on

analyzers.

4.1.3 Closing of Work Order

Work order was a general document that provided by SSMC to Air Liquide to

performance some tasks in their premises. These orders act as a proof to both

SSMC and Air Liquide that the tasks had been done and closed.

So my role was to make sure all the tasks given had been settled within the

period of time given then went in the computer system and close all the

required work orders. Lastly, all the closed work orders were documented as a

proof and easier for tracing.

5. Ad-Hoc Task

Apart from Routine work and key assignments, I was assigned for some other tasks both

technical and non-technical works.

5.1 Technical Works

Plant Shut Down Maintenance

Tank farm had undergone one week plant shut down maintenance for checking,

repairing and maintenance of all required equipment. Throughout this shut down

project, all the required items had been refurbished and maintained to keep in good

performance.

Change of the column of the Purifier

As we know the purifier role was to remove unwanted impurities through catalytic

adsorption process. Due to longer period of performance the catalyze bed of the purifier

was saturated with all the impurities materials so there needed to change a new clean

catalyze bed column. Through involving myself in this task, I was able to gain

knowledge on the operation of the purifier in term of the pipe line system, heating and

cooling system and the purging system.

Troubleshooting of Compressor

Compressor role was to compress the air and remove some of unwanted dust and

particles. Compressor had it capacity in compressing the air before to chiller for cooling

down. I had the chance to learn and real practice on troubleshooting the compressor by

adjusting the flow rate of input and output to set the value within the best efficiency

capacity.

5.2 Non-Technical Works

Initiate working permit

Regulating the pressure and flow rate of the supplied

Register for SIC training

Update the Standard Operating Procedure

Organized Safety Day 2016 for Electronic Gas Operation (EGO) department

6. Experience toward the Industrial Attachment

Throughout the 20-weeks of industrial attachment, I personally felt that how importance of such

industrial attachment needed by an undergraduate students before facing the real working life. For

me, I truly felt that I had gained and acquired working experiences throughout this whole internship.

Undoubtedly, I had learnt and enrolled some knowledge from diversified aspects that definitely

benefit to me for my future. One of the aspects I had learnt was to be more approachable to

everyone in the working place. It was a norm that for an intern to feel that they had been leave

over by their fellow colleagues or supervisor as they were just fresh and new to the working

environment. However, on good site this was the opportunity to explore and be open-minded to

learn from others. As an intern, I had taken initiative toward all my colleague and supervisor to

help them on some of the task like documentation, reporting, discussion on operation and on site

troubleshooting which indirectly I had taken in something useful along the way.

Then during the industrial attachment I realized the significant on applying knowledge from school

infused to the actual working engineering environment. My internship was based on process

operation controls which enable me to refresh my knowledge and practice in my working place.

Those processes such as distillation, separation, rectification, and other processes were applied in

the operation yet all these were not visible instead all these processes already installed inside a

designed stimulation model with some advance technologies. This enables me to explore new

simulation model that used in engineering field nowadays.

Moreover, this industrial attachment had given me a better understanding on the role and

responsibilities as an engineer in future. During this industrial attachment, I had experienced and

learnt the duty as an engineer in the aspects of understanding the whole operation process,

controlling the process and troubleshooting of the operation. Furthermore, besides technical duties,

engineer also had the responsibilities in keeping the documentation updated. Such documentation

can became source of tracing and approval that showcase the update and also the corrective action

that had taken. I was so grateful that I had the opportunity to experience both documentation role

and technical operation role during this internship.

Lastly, throughout this industrial attachment I had experienced and gained a lot of real life

engineering practices and I really felt that this 20-weeks internship had beneficial me toward my

future career.

7. Conclusion

The industrial attachment at Air Liquide Pte.Ltd has undoubtedly provided me with great

learning opportunity about the process and operation control and more importantly the role and

responsibilities as an engineer. I was really appreciated the patience and the guidance given by

the colleagues here when doubts were raised. They had tried their very best by squeezing extra

time to explain and answer all my questions to make sure I had a better understanding toward the

tasks I had taken throughout the internship.

The internship also provided me with the opportunity to learn how to use the company’s use

designed model simulation software on the actual operating parameters, control the process

changes and also control the productivity and more importantly the energy effectiveness. This

really gave me a good starting practice and understanding on the current simulation model.

Through the challenges that I had encountered during working on the assignment, I realized that

the operation of a process was not an easy task. Many controlled parameters such as flow rate,

pressure and temperature had to be taken into consideration and many options had to be within

the range to achieve an optimized process.

Moreover, Air Liquide had imparted me the importance of safety in the process as Safety had

always been the priority of the company since years ago. Air Liquide very concern on safety

toward all the employee. A lot of regulations, policies, safety meeting, safety briefing and rules

regarding safety had been implied to all the site of the company.

In conclusion, this industrial attachment experience had been a fruitful working experience for

me and definitely beneficial to me in preparing me myself for my future career as an engineer.