Hanoi
Hai Phong

COMPANY PROFILE

Ho Chi Minh

Technologies for creating the future

Land Plot CN3.2K, Dinh Vu Industrial Zone,Dong Hai 2 Ward, Hai An Dist., Hai Phong, Vietnam
Tel：+84-225-326-0715 〜 8
Fax：+84-225-326-0719
URL：http://www.nkweb.co.jp/
E-mail：info@rk-eng-vn.com

08.2020.030

ASME certified company
On December 4, 2012 RK ENGINEERING got the ASME certiﬁcate,
which is a manufacturing technology standard for the
production of power boilers and pressure vessels.
It is the ﬁrst Japanese company in Vietnam to obtain ASME
qualiﬁcation for manufacturing power boiler and pressure vessel,

ONE-STOP PRODUCTION

and it has contributed to the production of power generation,
chemicals, and food plant facilities in Southeast Asia, including
Vietnam, or China.

The ﬁrst meeting for ASME (May 22, 2012)

The second meeting for ASME (July 10, 2012)

The third meeting for ASME (August 16, 2012)

Demo-fabrication for ASME (September 26, 2012)

Final survey for ASME (November 15-16, 2012) (Document)

Final survey for ASME (November 16, 2012) (Factory)

Introduction
In March 2012, RK ENGINEERING CO.,LTD was established as a manufacture that can bring together the technical strength of Japanand the talented Vietnamese staﬀ in Hai Phong which is Vietnam's third largest city.
It has realized the high level of manufacturing technology and quality control required by plant manufacturers in and out ofVietnam and can meet a high level of cost-eﬀectiveness.
In February 2019, we also completed a one-stop in-house production line including the Vertical Precision Milling Machine in orderto make from the head plates which are indispensable for pressure vessel manufacturing to can manufacturing, heat treatment
and machining.
The trolley type convection heat treatment furnace, exhaust duct and chimney were designed by Rozai Industry andmanufactured by RK Engineering, and the LPG tank and LPG supply system for the incidental structure were designed andmanufactured only by RK Engineering's Vietnamese staﬀ.
We believe that with this skill, we can provide equipment in various ﬁelds that can meet our customersʼ requirements.
We all, Japanese and Vietnamese, will continue to proceed to the reliable manufacturer for our customers.

ASME SectionⅠ
Power Boiler（S）№43958

ASME is an abbreviation for The American Society of Mechanical Engineers.
Among the standards established by ASME, the ASME Boiler and Pressure Vessel Code (ASME Boiler and Pressure Vessel Code)establishes safety rules governing the design and inspection of pressure vessels as well as equipment in nuclear power plants.

Registered Company of Quality Management System（ISO 9001-2015） Safety Control

We are increasing corporate value and building relationships that customers cantrust by manufacturing safe products.
Quality policy

There are three biggest reasons why RK ENGINEERING chose the Deep-C Industrial
Park in Hai Phong.

To satisfy customer requirement on Quality, Cost, Delivery and
Safety, we make concered eﬀorts
together to take actions to continually improve eﬀectiveness of thequality management system byclarifying the roles and responsibilities and by improving employee's
competence.

1. Regional characteristics
Vietnam is located in the center of Southeast Asian countries and China and it has remarkable economic development.
Hai Phong City is located 100km east of Hanoi which is the capital city and it is a logistics center having an international trading port.

2. Site location
The Deep-C Industrial Park is adjacent to Dinh Buo Port, Hai Phong's international trading port,
and it is very suitable for loading raw materials and shipping large-scale products by sea.
They also completed the construction of Lac Yen Port to meet the increasing demand forcontainers.
What's more it has a highway CT.04 between Hanoi and Hai Phong other than sea
transportation, it takes 1 hour and 45 minutes by car to Hanoi, and it also has Cat Bi
International Airport connecting central and southern Vietnam from it.

Dinh

ASME SectionⅧ Div.1
Pressure Vessels（U）№43959

１Ｓ＋５Ｓ
Improvement activeties
SafetyVu

Port

S1 Seiri (Sorting/Tidiness)
S2 Seiton (Setting in order/Orderliness)
S3 Seiso (Shining/Cleanliness)
S4 Seiketsu (Standardize)
S5 Shitsuke (Sustain/Discipline)

Gulf of Tonkin

RK ENGINEERING
Deep-C Industrial Zone

3. Technical capabilities
Haiphong is historically well known for the shipping industry, and there are many factories engaged in
cutting, bending, and welding iron because shipping industry has its own wide skirts.
Therefore, we can hire highly skilled employees, and also ﬁnd many companies who can help us with our production.

1

Greeting Campaign

Safety Management213 Vertical Precision Milling Machine

12 Convection type car bottom heat treatment furnace

We will be the bridge between Vietnam and Japan through manufacturing pressure vessels ofhigh quality and competitive price, and create wonderful future.

9 Spinning machine

C棟
B棟

Equipments

Ａ棟
2

Oﬃce

3

5

8

6

9

12

10

11

13

7
4

1

10 Plasma cutting machine

8 Hydraulic pressing machine

1 Oﬃce2 Band saw machine

2 Radial drilling machine

6 Bending roll

1 Entrance
11 Overhead travelling crane 20t

Factory B・C

4 SSM (Special Spinning Machine)

3 1000ton pressing machine

2 Machining area

5 Canteen

3

7 Gantry crane at open yard

4

Products

Head plate

Sump Plate

Expansion A515-60

Heat treatment

Water tank

Chimney

Oxygen surge tank for Japan

Oxygen adsover for Japan

A516-60■T16(Min12.8)xD2000xEDxSF38

SA36■OD960xID492xt13■Nom.12(min10.5)x■ID3000xOD3542xH288

Polishing shell plate
Shell plate bending
Assembly and welding of shell plate(Inner surface polished products)

SUS304■350A x L533

Assembly and welding ofshell plate (SS400)

Installation of partition plate(SUS304)

SUS201■OD360x1.2txL11570

SS400■ID3000xTL~TL5410xt12

Liqueﬁed gas
drainage tank

GAC tank
for CCBHMS adsorber

SA516-70（U-STAMP）■ID2000x
TL~TL2276xt10

SA240TP304■ID2100x
TL~TL4614xt6

SA240TP316L■ID2100x
T.L~T.L5813x10t

Stainless steel tank 11kinds, 17sets

SS400■ID3400xTL~TL1600xt12

100ｍ３ Silicone oil tank for Japan
SUS304
4 spaces inner surface polished #300
■φ3400ｘＬ12000

Shipping (for Japan)

Polishing inner surface ofHead plate

Column SUS316L

Recuperator

Duct for dust collector of AL melting
furnace and attached structures

Tank with Jacket

Manhole cover for Japan

CasingImpeller

ＬＰＧ tank

Mixing tank

Separator tankN2H2 Receiver tank

Recuperator for Thailand

RT Recuperator for Japan

Separator tank

■OD1582xID1364 x L3015

SUS304

FinishSUS316Ｌ■φ1860ｘＬ1960〜２pcs

SS400■Total weight：9500kg

SUS316Ｌ■φ1410ｘＬ1960〜２pcs

Body:SUS316L
JKSUS304

SA516-70■φ2500ｘＬ7250

Customer's witness inspection

SUS316Ｌ/SS400■φ1850ｘＨ3100〜１pc■φ1155ｘＨ2000〜１pc

SUS304/SS400■φ216.3ｘＬ1158〜16pcs

5

SUS304/SS400■φ356ｘＬ3370 〜 120pc

SUS316Ｌ■φ2200ｘＨ3900

SUS304L■ASME U-Stamp

SUS304■１ｍ３〜２pcs、0.5ｍ３〜１pc

Buﬀer tank
SS400
■3.4ｍ３

SUS304／SS400■φ267.4ｘＬ2620〜16pcs

Cart

6

Convection type car bottom heat treatment furnace

Vertical Precision Milling Machine

Heat treatment for improving mechanical properties of metal
Heat treatment is essential to conform to standard of steel structures

Realizing a new era of one-stop productivity
with the new Vertical Precision Milling Machine

Heat treatment is essential to improve mechanical properties of mechanicalWith the multi-sided simultaneous processing, which is a feature of the Vertical
Precision Milling Machine, it can finish complex processes from the top to the side at once.

parts and structures by improving strength, elongation, and toughness.

It greatly improves the machining of pressure vessels and structures, and also

We equiped a heat treatment furnace which has one of the largest capacity

improves quality, delivery time, and price to meet the customersʼ satisfaction.

of size and temperature in Vietnam. It made us possible to perform one
stop production of products that require heat treatmentby various
standards.

Inside of furnace
Made in Mitsubishi Heavy Industries

Table work surface

2,300mmｘ4,000mm

Table work surface between columns

2,300mmｘ4,000mm

Distance between columns

2,550mm

Distance from table top to spindle nose

2,100mm

Loading capacity

30,000Kg

Forming Head plate

BurnerConvection type car bottom heat treatment furnace Closed

Forming technology of Head plate that is used in various ﬁelds.
Head plate is essential for vessel
We deal with various Head plates that is used in chemical, pharmaceutical, and food plant.
Besides plant, Head plate is used for boiler, underground storage tank at gas station, tank truck and tank train.

Our heat treatment furnace, exhaust duct, and chimney
are designed by ROZAI KOGYO,
manufac tured by RK ENGINEERING.LPG tank andsupplysystem for furnace is designed andIn addition, our technology is used for lighted buoy that is necessary for safe voyage.
Head forming technology will continue to contribute to development of industry.

manufactured by Vietnamese stuﬀ of RK ENGINEERING.

Material arrival

Head forming
process

Edge preparation

Receiving inspection

External equipments
Convection type car bottom heat treatment
furnace Opened

Cutting

Welding■Speciﬁcation of Heat treatment furnace

Outside overview

Type

Convection type car bottom
heat treatment furnace

Fuel

LPG

Heat treatment
temperature
Tolerance
Chimney

Inspection

Inside dimension 4000W × 7000L× 4000H
Capacity

Forming

30Ton ／ CH
Annealing

600 〜 650℃

Normalizing

900 〜 950℃

SolutionMax.1050℃

Pressing

Nondestructive inspection
Spinning (cold forming)±25℃

Inspection report・Material certiﬁcate

LPG Tank
Heat treatment

7

Cleaning

Polishing・Blasting・primer painting

Shipping

8

Technologies for creating the future

Equipment List

（As of March 2020）

Equipment

Description

Convection type carbottom heat treatment
furnace

Inside dimension（W4000×H4000×L7000）
Max.temp. 1050℃ Max.weight 30t

1set

Hydraulic pressing machine

1000t

1set

Hydraulic pressing machine

W6000×Daylight 2500

Quantity

1set

Spinning machine

22t×φ800〜φ4000

1set

Special Spinning Machine

14t×φ3000×Max.Height 3000

1set

Bending roll

25t×W2550

1set

Bending roll

6t×W2000（Min. φ150）

1set

CNC gas/plasma
cutting machine

W2500×L6000
Thickness（SS Max. 60mm, CS Max. 120mm）

1set

Quantity

300Ａ

9sets

TIG welding machine（Small-sized） 200Ａ

2sets

Arc welding machine

400Ａ

3sets

会社設立
資 本 金
代 表 者
従業員数
事業内容

Arc welding machine（Small-sized） 200Ａ

5sets

本

DC arc welding machine

2sets

630Ａ

TIG Meister

2sets

Tube end seal automatic welder

1sets

Grinder

27setsBeveling machine for Head plate

1set

Polishing machine（Automatic）

1set

Polishing machine（Manual）

13setsVertical Precision
Milling Machine

W2300×H2100×L4000

1set

Lathe

Max. φ1600、Max.length 3000

3sets

Compressor

Band saw machine

Thickness Max. 400mm

1set

Pressure pump

4sets

Milling machine

Table length 800mm

2sets

Radial drilling machine

2sets

PMI（Positive Material Identiﬁcation）
equipment

1set

1210L×640H Max. φ32

SlotterMax. φ100ｍｍ

1set

Welding positioner

500kg, 150kg

3sets

Turning rolls

10t

6sets

Turning rolls

5t

3sets

Gas cutting machine

6sets

Plasma cutting machineMax. 60mm

1set

Submerged
arc welding machine

1000Ａ

1set

MAG welding machine

350Ａ

25setsロザイ工業株式会社

Description

TIG welding machine

300t（with manipulator）

Equipment

Hydraulic pressing machine（for straightening）

100t

2sets

15Hp

2sets

Overhead travelling crane

20t

2sets

Overhead travelling crane

10／5t

1set

Overhead travelling crane

10t

2sets

Overhead travelling crane

5t

5sets

Gantry crane at open yard

20/5t×22㎜

1set

Jib crane

0.5t

4sets

Forklift

5t

1set

Welding rod dryer

100kg

1set

Portable welding rod dryer

Local subsidiary

4sets

社

会社設立
資 本 金
代 表 者
従業員数
事業内容
本

社

9

RK ENGINEERING CO.,LTD.

President

小林 三郎（SABURO KOBAYASHI）（President of NIPPON KYOHAN KOGYO CO.,LTD.）

Address〈Office・Factory〉

Land Plot CN3.2K, Dinh Vu Industrial Zone,Dong Hai 2 Ward, Hai An Dist., Hai Phong, Vietnam
Tel：+84-31-326-0715〜8
Fax：+84-31-326-0719

Established

April 14, 2011

Operation started

April 2012

Paid-up Capital

US$ 5,663,000

Investment ratio

NIPPON KYOHAN KOGYO CO.,LTD. 100%

Business

Manufacturing and sale of pressure vessel, head plate, industrial furnace, refractory, burner, etc.

Site area

15,000 ㎡

Factory area

5,300 ㎡

Employees

106

Established : August 1st, 1947
Paid-up Capital : \96,000,000
The Management : Taro Kobayashi President & CEO
Employees : 245
Business : Design, manufacture, installation of industrial furnace andenvironmental control system,Design and manufacture of combustion
equipment,Manufacture of refractories and functional materials
Head Oﬃce : 2-14, 1-chome, Minamihorie, Nishi-ku,
Osaka, Japan 550-0015
Phone : (81)6-6534-3611 FAX : (81)6-6531-2043
E-mail : rinfo@rozai.co.jp
URL : http://www.rozai.co.jp

1947年8月1日
96,000,000円
代表取締役 社長執行役員 小林太郎
245名
工業炉設備・環境設備の設計・製作・施工
燃焼機器の設計・製作、耐火物・機能材料の製造〒550-0015 大阪市西区南堀江1丁目2番14号
電話：06（6534）3611（代表）FAX：06（6531）2043
E-mail：rinfo@rozai.co.jp
URL：http://www.rozai.co.jp

日本鏡板工業株式会社

NIPPON KYOHAN KOGYO CO.,LTD.
Established : February 1st, 1965
Paid-up Capital : \90,000,000
The Management : Saburo Kobayashi President
Employees : 120
Business : Manufacture of various types of tank head,pressure vessel and manhole cover,Metal press-bending,
Manufacture of chemical engineering machine
Head Oﬃce : 12-22, 6-chome, Mitejima,
Nishiyodogawa-ku, Osaka, Japan 555-0012
Phone : (81)6-6472-4772 FAX : (81)6-6477-1430
E-mail : info-s@nkweb.co.jp
URL : http://www.nkweb.co.jp

1965年2月1日
90,000,000円
代表取締役社長 小林三郎
120名
各種鏡板・圧力容器・マンホールカバーの製造
金属プレス曲げ加工全般
化工機設備の製造〒555-0012 大阪市西淀川区御幣島6丁目12­22
電話：06（6472）4772（代表） FAX：06（6477）1430
E-mail： info-s@nkweb.co.jp
URL：http://www.nkweb.co.jp

ロザイ工業株式会社 上海駐在員事務所
設
立
代 表 者
事業内容
本
社

2020年7月1日
権 永吉
工業炉設備・関連部品・耐火物の中国国内営業と市場調査〒314000 浙江省嘉興市南湖区亜欧路851号45-806室
電話：（86）185 0167 6318
E-mail：quan@rozai.cn
URL：http://www.rozai.cn

炉（大連）耐火材料有限公司

会社設立
資 本 金
役
員

2011年2月25日
US$1,000,000
董 事 長 小林太郎
総 経 理 小林洋介
副総経理 金谷雅勝
耐火物・機能材料の製造
耐火物製品の中国国内販売・海外輸出販売
耐火物関連の設計・施工
大連市開発区得勝街道得勝村工業園1号
電話： (86)411-87214180 FAX： (86)411-87214184
E-mail : info-dalian@rozai.cn

事業内容

Company nameROZAI KOGYO KAISHA,LTD.

本社

ROZAI KOGYO KAISHA, LTD. Shanghai Sub-Branch

Established : July 1st, 2020
The Management : QUAN YONG JIBusiness : Business and marketing of industrial furnace,associated components and refractory
Head Oﬃce : No.851 Yaou Road, Jiayuan-Oriental City 45-806，
Jiaxing city,
Zhejiang Province, China
Phone :（86）185 0167 6318
E-mail : quan@rozai.cn
URL : http://www.rozai.cn

ROZAI (DALIAN) CERAMICS CO.,LTD.
Established : February 25 2011
Paid-up Capital : US$1,000,000
The Management : Taro Kobayashi Chairman
Yosuke Kobayashi President
Masakatsu Kanaya Vice President
Business : Manufacture of refractories and functional materials,
Domestic sale and export & sale of refractory products,
Design and installation of refractories and related products
Head Oﬃce : No.1, Industrial Estate,Desheng Village,
Desheng Street,Dalian Development Area,
Dalian, P. R. China
Phone : (86)411-87214180 FAX : (86)411-87214184
E-mail : info-dalian@rozai.cn

ROZAI（THAILAND）CO.,LTD.
会社設立
資 本 金
代 表 者
事業内容
本

社

2013年2月20日
2,000,000バーツ
小林太郎
工業炉を主とする産業機械及び耐火物の販売・技術サービス提供・施工
246 Times Square Building 15-03
Sukhumvit Rd., Between Soi 12-14,
Klongtoey, Bangkok 10110 Thailand
電話：（66）
83-615-9028 FAX：
（66）
2-653-0899
E-mail : info-th@rozai.co.th

Established : February 20ｔ
ｈ, 2013
Paid-up Capital : THB2,000,000
The Management : Taro Kobayashi President
Business : Sales,technical service oﬀer andconstruction of the industrial machineryand refractories, mainly involving the industrial furnace.
Head Oﬃce : 246 Times Square Building 15-03
Sukhumvit Rd., Between Soi 12-14,
Klongtoey, Bangkok 10110 Thailand
Phone : (66)83-615-9028 FAX : (66)2-653-0899
E-mail : info-th@rozai.co.th10