JIS G3463 Stainless Steel Heat Exchanger Boiler Pipe

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JIS G3463 Stainless Steel Heat Exchanger Boiler Pipe

Introduction

The JIS G3463 standard specifies the requirements for stainless steel pipes used in heat exchangers and boilers. These pipes are designed to withstand high temperatures and pressures, making them ideal for use in industrial applications such as power plants, chemical plants, and refineries. This document provides a comprehensive overview of JIS G3463 stainless steel heat exchanger boiler pipes, including their specifications, materials, manufacturing processes, applications, advantages, and key considerations.

Specifications

Material Grades

JIS G3463 covers several grades of stainless steel, each suited for different operating conditions. Common grades include:

  • SUS304TB: Austenitic stainless steel with excellent corrosion resistance and good mechanical properties.
  • SUS316TB: Austenitic stainless steel with added molybdenum for enhanced corrosion resistance, particularly against chlorides.
  • SUS321TB: Austenitic stainless steel stabilized with titanium to improve resistance to intergranular corrosion.
  • SUS347TB: Similar to SUS321TB but stabilized with niobium.

Dimensions and Tolerances

JIS G3463 specifies dimensions and tolerances for stainless steel pipes, ensuring they meet precise standards for use in heat exchangers and boilers. Key dimensions include:

  • Outer Diameter (OD): Ranges from 15.88 mm to 114.3 mm.
  • Wall Thickness: Typically ranges from 1.2 mm to 8.0 mm, depending on the application.
  • Length: Standard lengths are 4 to 7 meters, but custom lengths can be manufactured as per requirements.

Mechanical Properties

The mechanical properties of JIS G3463 stainless steel pipes are crucial for their performance in high-pressure and high-temperature environments. Properties include:

  • Tensile Strength: Minimum of 515 MPa for SUS304TB and SUS316TB.
  • Yield Strength: Minimum of 205 MPa for SUS304TB and SUS316TB.
  • Elongation: Minimum of 35% for SUS304TB and SUS316TB.

Chemical Composition

The chemical composition of the stainless steel grades specified by JIS G3463 ensures their ability to withstand corrosion and high temperatures. Typical compositions include:

  • SUS304TB: 18-20% Chromium, 8-10.5% Nickel, max 0.08% Carbon.
  • SUS316TB: 16-18% Chromium, 10-14% Nickel, 2-3% Molybdenum, max 0.08% Carbon.
  • SUS321TB: 17-19% Chromium, 9-12% Nickel, max 0.08% Carbon, 0.1-0.5% Titanium.
  • SUS347TB: 17-19% Chromium, 9-13% Nickel, max 0.08% Carbon, 0.2-1.0% Niobium.

 

IS G3463 Steel Tube Chemical Composition:

Grade Chemical composition %
C Si Mn P S Ni Cr Mo
SUS 304TB 0.08 max. 1.00 max. 2.00max. 0.040 max. 0.030 max. 8.00~11.00 18.00~20.00
SUS 304HTB 0.04~0.10 0.75 max. 2.00max. 0.040 max. 0.030 max. 8.00~11.00 18.00~20.00
SUS 304LTB 0.030 max. 1.00 max. 2.00max. 0.040 max. 0.030 max. 9.00~13.00 18.00~20.00
SUS 309STB 0.15 max. 1.00 max. 2.00max. 0.040 max. 0.030 max. 12.00~15.00 22.00~24.00
SUS 310TB 0.08 max 1.00 max. 2.00max. 0.040 max. 0.030 max. 12.00~15.00 22.00~24.00
SUS 310STB 0.15 max. 1.50 max. 2.00max. 0.040 max. 0.030 max. 19.00~22.00 24.00~26.00
SUS 316TB 0.08 max. 1.50 max. 2.00max. 0.040 max. 0.030 max. 19.00~22.00 24.00~26.00
SUS 316HTB 0.08 max. 1.00 max. 2.00max. 0.040 max. 0.030 max. 10.00~14.00 16.00~18.00 2.00~3.00
SUS 316LTB 0.04~0.10 0.75 max. 2.00max. 0.040 max. 0.030 max. 11.00~14.00 16.00~18.00 2.00~3.00
SUS 316TiTB 0.030 max. 1.00 max. 2.00max. 0.040 max. 0.030 max. 12.00~16.00 16.00~18.00 2.00~3.00

JIS G3463 Steel Tube Mechanical Property:

Symbol of grade Mechanical properties:
Tensile strength kg f/П
{N/П}
proof stress kg f/П
{N/П}
Elongation %
20 mm min.in outside diameter 10 mm or over to and excl. 20 mm in outside diameter Under 10 mm in outside diameter
No.11 test pieceNo.12 test piece No.11 test piece No.11 test piece
SUS304TB  53{520} min  21{206} min. 35 min. 30 min. 27 min.
SUS304HTB  53{520} min 21{206} min. 35 min. 30 min. 27 min.
SUS304LTB 49{481} min 18{177} min. 35 min. 30 min. 27 min.
SUS309TB  53{520} min 21{206} min 35 min. 30 min. 27 min.
SUS309STB  53{520} min 21{206} min 35 min. 30 min. 27 min.
SUS310TB  53{520} min 21{206} min 35 min. 30 min. 27 min.
SUS310STB  53{520} min 21{206} min 35 min. 30 min. 27 min.
SUS316TB  53{520} min 21{206} min 35 min. 30 min. 27 min.
SUS316HTB  53{520} min 21{206} min 35 min. 30 min. 27 min.
SUS316LTB 49{481} min 18{177} min 35 min. 30 min. 27 min.
SUS316TiTB  53{520} min 21{206} min 35 min. 30 min. 27 min.

JIS G3463 Steel Tube Equivalent Steel Grade:

JIS ASTM/ASME BS DIN
SA-213 T91 17175-X10CrMoVNb91
G3463 SUS304TB SA-213 Tp-304 17456 X2CrNi1911
G3463 SUS304HTB SA-213 Tp 304H 3059 CFS304S51
G3463 SUS316TB SA-213 Tp 316 17456 X5CrNiMo17122
G3463 SUS316HTB SA-213 Tp 316H 3059 CFS316S51
G3463 SUS321TB SA-213 Tp 321 17456 X6CrNiTi1810
G3463 SUS321HTB SA-213 Tp 321H 3059 CFS321S51
G3463 SUS347TB SA-213 Tp 347 17456 X5CrNiNB1810
G3463 SUS347HTB SA-213 Tp 347H 3059 CFS347S51

 

Manufacturing Process

Seamless Pipes

Seamless stainless steel pipes are produced through a process involving hot extrusion or cold drawing. This process ensures a uniform structure and high strength, making seamless pipes ideal for high-pressure applications.

Welded Pipes

Welded stainless steel pipes are produced by rolling stainless steel sheets into a tubular shape and welding the seam. These pipes are typically less expensive than seamless pipes and are suitable for applications with lower pressure requirements.

Heat Treatment

Heat treatment processes such as annealing and solution treatment are applied to stainless steel pipes to enhance their mechanical properties and corrosion resistance. This involves heating the pipes to a specific temperature and then cooling them rapidly.

Surface Finish

The surface finish of JIS G3463 stainless steel pipes can vary depending on the application. Common finishes include:

  • Pickled: A matte finish achieved by acid treatment, providing good corrosion resistance.
  • Polished: A smooth, reflective finish that enhances the appearance and further improves corrosion resistance.

Applications

JIS G3463 stainless steel heat exchanger boiler pipes are used in a variety of industrial applications, including:

Power Plants

These pipes are used in boilers and heat exchangers within power plants to transfer heat efficiently while withstanding high temperatures and pressures.

Chemical Plants

In chemical plants, stainless steel pipes are used for the transportation of corrosive fluids and gases, as well as in heat exchangers and reactors.

Refineries

Refineries utilize stainless steel pipes in their processing units to handle high-temperature and high-pressure conditions, as well as to resist corrosion from various chemicals.

Food and Beverage Industry

The non-reactive and corrosion-resistant properties of stainless steel make these pipes suitable for heat exchangers in the food and beverage industry, where hygiene and cleanliness are paramount.

Advantages

Corrosion Resistance

Stainless steel pipes offer excellent resistance to corrosion, making them suitable for use in harsh environments where exposure to chemicals and moisture is common.

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