JIS Pipe Standard
The JIS (Japanese Industrial Standards) stainless steel pipe standards are comprehensive specifications that ensure the quality, safety, and performance of stainless steel pipes in various industrial applications. These standards cover a wide range of pipe types, manufacturing processes, and material grades to meet diverse requirements.
JIS G3459 Stainless Steel Pipes
Scope
JIS G3459 specifies stainless steel pipes used for corrosion resistance, low-temperature service, high-temperature service, etc. These pipes are widely used in industries such as oil & gas, paper, breweries, cement, sugar, oil mills, mining, shipbuilding, and steel plants.
Grades
JIS G3459 includes 29 grades of stainless steel pipes, such as:
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Austenitic Series: SUS304, SUS304H, SUS304L, SUS309, SUS309S, SUS310, SUS310S, SUS316, SUS316H, SUS316L, SUS316Ti, SUS317, SUS317L, SUS836L, SUS890L, SUS321, SUS321H, SUS347, SUS347H
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Austenitic-Ferritic Series: SUS329J1, SUS329J3L, SUS329J4L
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Ferritic Series: SUS405, SUS409L, SUS430, SUS430LX, SUS430J1L, SUS436L, SUS444
Manufacturing Process
Pipes can be manufactured using:
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Seamless process
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Automatic arc welding process
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Laser welding process
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Electric resistance welding process
Heat Treatment
The standard specifies heat treatment requirements for different grades, including solution treatment temperatures and cooling methods. For example:
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Austenitic pipes like SUS304TP require solution treatment at 1010℃ minimum with rapid cooling.
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Ferritic pipes like SUS405TP require annealing at 700℃ minimum followed by air cooling or slow cooling.
Dimensions
The standard covers a range of dimensions, with outside diameters typically ranging from 9.5mm to 203.2mm. Specific dimensions and tolerances are provided for different pipe sizes and grades.
Other JIS Stainless Steel Pipe Standards
JIS G3446 Mechanical Structure Stainless Steel Pipes
Designed for mechanical structures requiring corrosion resistance and strength.
JIS G3447 Sanitary Stainless Steel Pipes
Used in sanitary applications such as food processing and pharmaceutical industries, meeting strict hygiene standards.
JIS G3448 General Purpose Stainless Steel Pipes
Suitable for general-purpose piping in various industries, providing good corrosion resistance and mechanical properties.
JIS G3468 Large Diameter Welded Stainless Steel Pipes
Used for large-diameter applications in piping systems, offering high strength and reliability.
These JIS standards ensure that stainless steel pipes are manufactured to meet the specific requirements of different industries, providing reliable and safe performance in their respective applications.