JIS Seamless Pipes

JIS seamless pipes refer to steel pipes that adhere to the standards set by the Japanese Industrial Standards (JIS).

When shopping for JIS seamless pipes it is important to consider the following factors:

• Quality of materials
• Corrosion resistance
• Tensile strength
• Ease of use

JIS seamless pipes are steel pipe that have been created by JIS and meets certain performance requirements. JIS standards cover various types of seamless pipes, including alloy steel, stainless steel, and carbon steel. These standards specify the technical requirements, dimensions, materials, and testing methods for seamless pipes. Some commonly referenced JIS standards for seamless pipes include JIS G3455, JIS G3452, JIS G3429, JIS G3441, JIS G3444, JIS G3445, and JIS G3454.

JIS seamless pipes are produced according to JIS standards, which ensure consistency and quality. Common standards include JIS G3454 (carbon steel pipes for pressure service), JIS G3455 (carbon steel pipes for high-temperature service), and JIS G3460 (carbon steel pipes for boiler and heat exchanger service).

JIS seamless pipes are available from manufacturers and suppliers worldwide. They come in different sizes, grades, and specifications to meet specific project requirements. It is important to consult with suppliers or refer to official sources to ensure the correct JIS standard is selected for a particular application.

Japanese Industrial Standards for steel

Japanese Industrial Standards (JIS) developed by the organization apply to a wide variety of industrial services and technologies such as automobiles, metallurgy, ships and medical equipment

The method for making cold-drawn seamless pipes involves taking a round “billet” or bar of steel and boring it in the center, turning it, cutting it, heating it to make it more pliable, then “drawing” it (extruding or pulling it) to make it a longer and thinner tube.

Japanese Industrial Standards specifies the standards used for industrial activities in Japan. The standardization process is coordinated by Japanese Industrial Standards Committee and published through Japanese Standards Association.

The Industrial Standardization Law was revised in 2004 and the JIS mark product certification system was changed. Standards are named like “JIS X 0208:1997″, where X denotes area division, followed by four digits (or five digits for some of the standards corresponding ISO standards) and the revision release year.

• G – Ferrous Materials and Metallurgy
• H – Nonferrous Materials and Metallurgy

MTC IN EN 10204.3

EN 10204:2004 is for metallic products-and this norm tell us things about Types of inspection documents. There are no material standards.

Mostly material is defined with its chemical composition and mechanical properties in a public standars like ISO, EN, JIS, ASTM etc.

What is JIS?

Japanese Industrial Standards (JIS) specifies the standards used for industrial activities in Japan. The standardization process is coordinated by Japanese Industrial Standards Committee and published through Japanese Standards Association.

Tolerance of JIS seamless pipe

Table 1: Tolerance on Outside Diameter in JIS G3441, G3444, G3445

Table 2: Tolerance on Wall Thickness in JIS G3441, G3444, G3445

Table 3: Tolerance on Outside Diameter and Wall Thickness in JIS G3454

Table 4: Tolerance on Outside Diameter and Wall Thickness in JIS G3455, G3456, G3458, G3460

Table 5: Tolerance on Outside Diameter in JIS G3461, G3462, G3464

Table 6: Tolerance on Wall Thickness in JIS G3461, G3462, G3464

Table 7: Tolerance on the Length in JIS G3461, G3462, G3464

Table 8: Tolerance on Outside Diameter in JIS G3465

JIS Number and Corrensponding Foreign Standards

In the Meiji era, private enterprises were responsible for making standards. However, the Japanese government did have standards and specification documents for procurement purposes for certain articles, such as munitions. These were summarized to form an official standard old JES in 1921. During World War II, simplified standards were established to increase matériel output. The Industrial Standardization Law was enacted in 1949, which forms the legal foundations for the present Japanese Industrial Standards.

Measurement size & Testing

• JIS seamless pipe testing covers many specifications, including alloy, size, toughness and composition.
• Those using steel products purchase the product that fulfills the requirements they need for what they are building.
• How To Measure Hardness Of Steel Pipe

Packing

• Packed in wooden crates, wrapped in plastic, and suitably protected for sea-worthly delivery or as requested.
• Both ends of each crate will indicate the order no., heat no., dimensions, weight and bundles or as requested.

Delivery

• Pipes are supplied in hexagonal bundles or round bundles tied with steel strip.
• Weight of bundle – up to 5000 kg upon request of customer.
• Each bundle is furnished with three tags.

Seamless tube processing

With years of expertise, we provide a diverse array of steel tube processing options. From sawing and machining tube blanks to intricate bending and upsetting operations, we actively assist you throughout your projects.

Our capabilities extend to eccentricity reduction and concentricity enhancement through turning and grinding. We excel in creating complex geometries using processes like rotary swaging and axial forming. Additionally, we offer property modifications via partial heat treatment, ensuring tailored solutions for your specific needs.

Variable wall thicknesses

Drilling / stamping / lasering

Peeling / roller burnishing

Cold forming

Cutting

Beveling

Deburring

Thread rolling / threading

Partial hardening

Turning / milling / grinding

Reducing / expanding

What is a seamless pipe used for?

Seamless steel pipe is regularly used in the transportation of fluids such as water, natural gas, waste and air. It is also regularly required in many high-pressure, high-corrosive environments such as in the oil & gas, power generation and pharmaceutical industries. Some common uses of seamless pipes include:

Bearing Pipes

Pipes designed for bearing loads, offering high strength and durability.

Boiler Tubes

Premium quality boiler tubes for reliable performance in steam generation applications.

Cold Drawn Cylinder Pipe

Cold drawn cylinders for precision and consistency in pipe dimensions and surface finish.

Fluid Tubes

Tubes for fluid transfer applications, ensuring leak-proof and durable performance.

Heat Exchanger Tubes

Efficient heat exchanger tubes designed for optimal thermal transfer in various industries.

High Strength Cylinder Pipe

High-strength pipes for applications requiring superior pressure and weight resistance.

Honed Tube

Honed tubes for precise internal diameters and surface finishes, ideal for hydraulic and pneumatic systems.

Sour Service Environment pipe

Line pipes specifically engineered for sour service environments, resistant to corrosion and hydrogen embrittlement.

Low-Temperature Service Pipe

Pipes designed for low-temperature service, ensuring flexibility and impact resistance at cryogenic temperatures.

Marine Seamless Steel Pipe

Seamless steel pipes for marine applications, providing strength and corrosion resistance in harsh marine conditions.

Mechanical Tubes

Mechanical tubes designed for structural applications, offering high strength and precision.

Other Structural Pipe

Structural pipes designed for various construction and engineering applications.

Pipe For Chemical Equipment

Pipes specifically manufactured for use in chemical processing equipment.

Pipe For Cryogenic Device

Pipes designed for cryogenic applications, ensuring performance at extremely low temperatures.

Pipe For Mechanical Engineering

Pipes utilized in mechanical engineering for fluid transfer and structural support.

Nuclear Power Station pipe

Seamless pipes for nuclear power stations, offering high integrity and safety standards.

Structure Pipe

High-quality seamless pipes for structural applications, ensuring reliability and durability.

Tubes For Pressure

Seamless tubes designed for withstanding pressure applications in various industries.

Seamless Pipes For High Temperature

Pipes suitable for high-temperature environments, offering excellent heat resistance.

Low And Medium Pressure pipes

Seamless pipes for low and medium pressure services, providing consistent performance.

Ship Building Tubes

Specialized seamless tubes for shipbuilding, designed for maritime applications and harsh conditions.

Steel Pipe For Gas Cylinder

Steel pipes for gas cylinder applications, ensuring safety and reliability in gas storage.

Tubes For Mechanical And Automobile

Dedicated tubes for mechanical and automotive industries, ensuring precision and reliability.

Seamless drill pipe

High-strength seamless drill pipes for drilling operations, offering durability and reliability.

Inspection

Chemical composition inspection, mechanical properties test(tensile strength,yield strength, elongation, flaring, flattening, bending, hardness, impact test), surface and dimension test,no-destructive test, hydrostatic test.

PMI

identification of the chemical composition of the metal used to manufacture the fitting. Uses PMI sensors, including X-ray fluorescence or optical emission spectrometry.

Size measurement

Seamless pipes with compound bevels as per ASME B16-25 And ASTM A333

Delivery

Steel pipe delivery status(condition)

Steel pipe delivery status(condition): cold / hard (BK), cold / soft (BKW), after cold stress relief annealing (BKS), annealing (GBK), normalized (NBK).

Condition on delivery of steel pipe

Term	Symbol	Explanation
Cold-finished/hard (cold-finished as-drawn)	BK	No heat treatment after the last cold-forming process. The tubes therefore have only low deformability.
Cold-finished/soft (lightly cold-worked)	BKW	After the last heat treatment there is a light finishing pass (cold drawing) With proper subsequent processing, the tube can be cold-formed (e.g. bent, expanded) within certain limits.
Annealed	GBK	After the final cold-forming process the tubes are annealed in a controlled atmosphere or under vacuum.
Normalized	NBK	The tubes are annealed above the upper transformation point in a controlled atmosphere or under vacuum.

The general cold strip mills, volume should go through continuous annealing (CAPL unit) to eliminate cold hardening and rolling stress, or batch annealing reach the mechanical properties of the corresponding standard specifies. Cold rolled steel surface quality, appearance, dimensional accuracy better than hot-rolled plate, and right-rolled thin product thickness is about 0.18mm, so the majority of users favor.

Cold rolled steel coil substrate products deep processing of high value-added products. Such as electro-galvanized, hot dip galvanized, electro-galvanized fingerprint resistant, painted steel roll damping composite steel, PVC laminating steel plates, etc., so that the excellent quality of these products has a beautiful, high resistance to corrosion, has been widely used.

Cold rolled steel coil finishing after annealing, cut the head, tail, trimming, flattening, smooth, heavy volume, or longitudinal clipboard. Cold-rolled products are widely used in automobile manufacturing, household electrical appliances, instruments, switches, buildings, office furniture and other industries. Steel plate strapping package weight of 3 to 5 tons. Flat sub-volume typically 3 to 10 tons / volume. Coil diameter 6m.

Packing

Bare packing/bundle packing/crate packing/wooden protection at the both sides of tubes and suitably protected for sea-worthly delivery or as requested.

Placing steel pipes into containers

There are probably hundreds of different methods for packing a pipe, and most of them have merit, but there are two principles that are vital for any method to work prevent rusting and Sea transportation security.

• Plastic caps plugged at the two sides of pipe ends
• Should be avoided by the steel strapping and transport damage
• Bundled signs should be uniform and consistent
• The same bundle(batch) of steel pipe should be came from the same furnace.
• The steel pipe has the same furnace number, the same steel grade, the same specifications.

Our packing can meet any needs of the customers.

Alloying Elements

Commonly used alloying elements and their effects are listed in the table given below.