Aiming to be the Top Steel Pipe Maker in the World
In 1902, founder Ichijiro Nobe first introduced Japan to the “cold drawn steel pipe” technology that he learned while in Germany. This was the start of our company.
We produce cold draw steel pipes. But upon listening to customer comments, we expanded our capabilities as a steel product trading company. Moreover, we make developments throughout subsidiary shipping companies, subsidiary PVC pipe sales companies, subsidiary construction material sales companies, and more.
Such multifaceted initiatives in our company are the result of consideration for the customer, regional economy, and our own effort.
We regularly work hard to deliver the best products to our clients. This is from the pride that comes from being the first cold draw steel pipe company in Japan.
Pursuit of product quality is a given, but we also aim to reduce the frequency of prototype production and delivery time while optimizing support for customer needs. Up to now, and from now on, we aim to be the “best steel pipe maker in the world” in the eyes of our customers.
A life of decisive action
In terms of the next step for Osaka Steel Tube, we turn to new employee abilities that will become a greater driving force. Sales work, technological work, office work, regardless of the type of responsibility, new employee ability is the impetus to think for one’s self, act on one’s own, and have gentle thoughts. In this age, it is not enough to simply do the job given to you and survive. This is true for corporations as well as people.
By extending an antenna that catches what users and society want, and then solving the anticipated problems that face the actualization of that want, results will be produced. I want employees with such abilities to move forward alongside Osaka Steel Tube. We are making a work environment that allows ideas born from gentle thought to be heard. Now, Osaka Steel Tube has entered another long period of stability. Yet, the more stability is ensured, the more a sense of impending danger grows. Corporations respond to their environment, and must adapt and evolve with the times. The burden now shifts more to the new employees. Particularity for the realization of new operational developments at Osaka Steel Tube, new employee’s abilities will be the engine for the anticipated drawing out of new capabilities.
When I was in graduate school, one of my professors gave me this advice: “If you’re at a loss, just do it.” When there is something that must, or is desired, to be done yet cannot be accomplished, people become lost. Wondering whether or not to do something means you have sufficiently evaluated the risks. Moreover, it is something that you want to do. In the age of artificial intelligence and automatic driving, humans will probably have to decide what can only be done by humans. There are many things at Osaka Steel Tube that “must be done.” Inside the company, there are many employees who have something they “want to do” for the customer or for society. It is more interesting to try something before making a list of ideas why it is impossible.
I wait for that knock on the door and a new challenge is welcome in at Osaka Steel Tube.
CEO Tsuyoshi Sakane
Energy Field × Osaka Steel Tube
The steel pipes made at the Osaka Steel Tube factories are mainly used at oil refineries and various electric power plants. We have been providing for these fields for a long time. They are fields that, if taken out of commission for even a short amount of time, would cause a great and negative impact on society.
Furthermore, boilers are used in many settings, including factory work and as production heat sources. Steel pipes used in large-scale boilers are also made at Osaka Steel Tube factories.
Making products that are demanded by society’s needs and customer requests, as well as delivering products reliably, has been the mission of Osaka Steel Tube since our foundation 95 years ago.
Shipbuilding Industry × Osaka Steel Tube
In modern society, countries are connected without border by trade. The role of the shipbuilding industry continues to grow. Highly advanced Japanese shipbuilding technology is used to make durable ships with minimal defects that travel the world carrying freight and meeting deadlines.
The inner compartments of ship use a colossal amount of steel pipes. Osaka Steel Tube contributes to the shipbuilding industry and the world by providing just-in-time delivery of necessary steel pipe in a variety of sizes.
Automobile Manufacturing × Osaka Steel Tube
At Osaka Steel Tube, we make key components for automobiles. Automobiles, which drive tens of thousands of kilometers, can malfunction and cause a traffic accident if just a single component is defective.
Osaka Steel Tube’s mission is to provide reliable steel pipe to any industry.
Our Manufacturing Factories and Processes
Introduction of Cold Draw Technology
The cold draw method involves polishing the surface of material pipe (hot-made seamless steel pipe, or welded steel pipe) before passing it through a metal mold at room temperature (drawing) to the specified dimensions.
Characteristics of the cold draw process
1.Improving dimensional accuracy.
2. Surface can undergo a polished finish.
3. Ability to fabricate small diameter pipes, thin pipes, and special orders outside standard dimensions and shapes.
4. By combining cold drawn pipe fabrication with heat treatment, a variety of mechanical qualities can be attained.
5. A uniform metallurgical structure and property can be attained.
6. Small quantity/multiple variety fabrication possible.
Material Acceptance and Testing
After purchasing from blast furnace makers, material pipes are inspected upon delivery and then stored in a stockyard.
The reception inspection involves assuring satisfactory specifications as decided with the customer, a match check between the delivery form and material, dimensions, etc., and confirming that there is no damage, rust, or other external anomalies.
Material pipe can be divided into hundreds of classes depending n material, production method, and dimensions.
Process 1: Obtaining Material
This process involves paying out a necessary amount of optimal material to factories in order to draw out material pipe to the final product’s dimensions that conform to the product specifications as indicated in the customer order.
Process 2: Softening
Material pipe is softened through heat treatment before being drawn out in order to make the drawing process easier.
This step as well as pull drawing is repeated as many times as necessary depending on the final product.
Process 3: Acid Wash and Lubrication
Dilute sulfuric acid is used to remove rust and oxidation products from the material. After the acid wash, the pipe undergoes surface polishing to remove abrasion from the drawing process.
Process 4: Nozzling
Nozzling involves constricting one end of the pipe to reduce the diameter. This end is grasped in the next step by a machine during the drawing process.
Process 5: Drawing (stretching)
This process involves passing the pipe through two metal molds called dice and plugs at room temperature to give it the desired dimensions and shape.
Dice are metal molds with holes that give products an outer diameter. Plugs are metal molds that give products an inner diameter.
Process 6: Final Heat Processing
A final heat treatment is carried out after the pipe is drawn, and the metallic structure and mechanical qualities are investigated in order to ensure satisfactory required standards and customer specifications.
Bright annealing is used as the main process, allowing for a variety of heat treatment patters ranging from 550 degrees Centigrade (1022 degrees F) to 920 degrees Centigrade (1688 degrees F).
Process 7: Correction
This process straightens pipes and corrects any bends that may have occurred during drawing and the final heat treatment.
If the pipe is circular, a rolling style is used. If another shape, a press machine is used to make corrections.
Process 8: Non-Destruction Inspection
Pipes are passed through a magnetic coil. By reading the electrical changes produced by the excess current, damage and other defects can be found using this excess current deep damage inspection. An ultrasonic deep damage inspection device is also available for testing.
Process 9: Cutting
The process of cutting the pipe to the requested length. Cutting is carried out using a chip saw. Burrs and other anomalies produced by cutting are smoothed out by a rotating brush before quality testing.
Process 10: Mechanical Testing
A test sample is taken from the main pipe of the product and then stretched, flattened, hardness tested, etc. in accordance with required standards and customer specifications to ensure satisfaction of regulations.
Process 11: Product Testing
This process includes the testing of pipe damage, bending, as well as external factors such as outer diameter, inner diameter, thickness, length, end angle, and other dimensions. Pipes are lined up on a test platform and examined with care.
Process 12: Water Pressure Testing
Water pressure is applied to the inside of the pipe and investigators look for pressure resistance, leaks, etc.
This testing is mainly performed only by customer request.
Process 13: Display
Shipping tabs, stenciling, and other displays are applied to bundles and individual pipes. In addition to pipe specifications and dimensions, manufacturer, production number, production date, and other information is indicated to confirm manufacturing history.
Bending, water pressure testing, and other processing can be carried out.
Process 14: Rust Prevention and Packaging
Pipes are coated in rust-preventing oil, etc. before being packaged in a variety of ways in order to prevent rusting and protect the pipes.
End caps can also be added at customer request.
Process 15: Shipping
In general, manufactured pipes are delivered to customers by truck.
Our company takes pride in the strict adherence to delivery deadlines as a promise to our customers.
Steel pipes are pulled through dice and plugs at room temperature during the elongation process.
Steel pipes cannot only be adjusted according to outer diameter, but inner diameter can also be adjusted during the machining phase by inserting plugs. This allows for the precise setting of steel pipe thickness.
Drawing, the primary process in the cold drawn steel pipe manufacturing method, depends on pre-drawing steel pipe quality and pre-elongation surface smoothness processing in addition to the elongation technology itself.
Since the microstructure of the cold drawn tubes are deformed and distorted, there is a problem in the material as it is after drawing.
Heat treatment removes the distortion and make the pipe properties normal.
On the drawing process and heat treatment process the steel pipe becomes curved, it will be finished through straightening process.
Management with All Employees
Education Programs and Training Camp
A company’s number one asset is its people.
At Osaka Steel Tube, we carry out yearly overnight training divided by work, managerial position, age, and other factors. Although outside instructors are sometimes brought in, the main focus is on directors and other managers holding courses on why the things we hold to be important are indeed important. During the 2016 overnight training, we focused on learning about understanding thinking together through group work. While considering how employees will earnestly take the company into the future, we were able to hear new opinions that should be incorporated into company management. Fun parties are also held during overnight training sessions. By allowing the employees to get closer to the directors and president, advancements are made in making a company with worthwhile efforts over the long term.
Education is also carried out at various times during the year. During new employee training, an opportunity is made to thoroughly spend time on all the new arrivals who are entering the adult workforce for the first time so that they can learn about experience, the role of each department, responsibility, and more from management staff. After factory training, OJT (On the Job Training) is continued along with other assignees while individualized support is provided. The “Ability Level Map” is important to OJT education. It allows for the accurate determination of each person’s skill level and the continuation of necessary instruction at each level.
Real exchange of technology has been continuing since first scheduling and holding the monthly “OKK Dojo” technology transfer group training in 2002. There is also the qualification acquisition support system, the communication education lecture support system, recommended readings, and a variety of other support systems.
Organization activation with 5S system
Organizational activation efforts commenced and revamped in 2015 with an application of the 5S principle as the base project. The necessary attitude of each employee at Osaka Steel Tube alone has a great affect on the company. The spirit of making a great company through the 5S principles of seiri (sort), seiton (set in order), seiso (shine), seiketsu (standardize), and shitsuke (sustain) is one value that has been held by Osaka Steel Tube for a long time.
Compared to before these efforts, the company is now more orderly, tidy, and greetings are warmly exchanged. The 5S principle will continue to be applied further.
- Social insurance
- various types of congratulatory/condolence schemes
- payment advance system
- various types of recognition schemes
- schemes related to sanitation
- housing support system
Please feel free to directly contact us regarding details.
A softball tournament and other events are held annually as part of company recreation.
Once every five years, an employee trip is provided with all basic expenses paid.
80th Anniversary South Korea
85th Anniversary Shanghai
90th Anniversary Taiwan
95th Anniversary Thailand
Total Education for Entering Employees
- Pre-Entrance Training
internship, specialized knowledge education
- Entrance Training
entering employees become familiar with the company environment through foundational training.
- On the Job Training
all processing steps are taught on the site of manufacturing.
- Applicable Training
in addition to individual department training, OJT will also be thoroughly and reliably implemented upon trainees being divided into groups.