GB/T 30066 Stainless Steel Tube Welded Ferritic Stainless Steel Tubes For Heat-Exchanger And Condenser

Introduction

In the field of heat exchangers and condensers, stainless steel tubes play a vital role in ensuring efficient heat transfer and corrosion resistance. The GB/T 30066 standard specifies the requirements for welded ferritic stainless steel tubes used in heat exchangers and condensers. This article will provide an overview of the material, specification, key features, chemical composition, mechanical properties, steel grades, applications, and possible alternative grades in accordance with GB/T 30066.

Material and Specification

The GB/T 30066 standard covers welded ferritic stainless steel tubes, which are primarily composed of ferritic stainless steel materials. These tubes are designed to withstand high temperatures and exhibit excellent resistance to corrosion, making them suitable for use in heat exchangers and condensers. The specification provides guidelines for the manufacturing process, dimensional tolerances, appearance, and permissible defects of the tubes.

Key Features

• High-temperature resistance: The stainless steel tubes meet the demands of heat exchangers and condensers, where they are exposed to elevated temperatures.
• Corrosion resistance: Ferritic stainless steel exhibits superior resistance to corrosion, preventing any potential damage caused by corrosive fluids or environments.
• Welded construction: The tubes are manufactured using a welded construction technique, ensuring strong and seamless joints.
• Durability: The stainless steel tubes are designed to withstand challenging operating conditions, providing a long lifespan and reducing maintenance requirements.

Chemical Composition

The following table presents the chemical composition requirements (% by mass) for ferritic stainless steel tubes according to GB/T 30066:

Mechanical Properties

The following table presents the mechanical properties of ferritic stainless steel tubes, as specified by GB/T 30066:

Steel Grade

According to GB/T 30066, the steel grade used for the welded ferritic stainless steel tubes is determined by the manufacturer and should meet the specified chemical composition and mechanical properties requirements.

Application

The GB/T 30066 standard is applicable to welded ferritic stainless steel tubes primarily used in heat exchangers and condensers. These tubes find extensive applications in industries such as chemical processing, power generation, oil and gas, and HVAC systems. Their ability to resist corrosion and withstand high temperatures makes them highly suitable for these demanding environments.

Possible Alternative Grades

While GB/T 30066 provides specific guidelines for ferritic stainless steel tubes for heat exchangers and condensers, there are other international standards that offer alternative grades suitable for similar applications. Some possible alternative grades include ASTM A268, EN 10217-7, and JIS G3463. It is essential to consider the specific requirements and consult the relevant standards when selecting alternative grades for a particular application.

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