Common Heat Exchange Tube Specifications and Standards

1.Common heat exchange tube specifications and standards at home and abroad

Depending on different domestic and foreign standards, the specifications of heat exchange tubes are also different. The following is an introduction to common heat exchange tube specifications and standards:

（1）International standards

The International Organization for Standardization (ISO) stipulates that the length of heat exchange tubes shall not exceed 18000mm, the outer diameter shall be 6mm to 89mm, and the wall thickness shall be 1.0mm to 8.1mm. Common international standards include ASTM A179, ASTM A192, ASTM A210, ASTM A213, etc.

International standards refer to the specifications and standards of heat exchanger tubes applicable worldwide. Common international standards include:

Standard	Name	Pipe diameter range (mm)	Wall thickness range (mm)
ASTM A179/A179M	Carbon steel seamless cold drawn tube	6-76	1-8
ASTM A213/A213M	Stainless steel and heat resistant alloy seamless tube	3.2-127	0.4-12.7
DIN 17175/2448	Carbon steel and alloy steel seamless tube	10-762	1-80
JIS G3461	Carbon steel boiler and heat exchanger tube	15.9-139.8	2-20

（2）American Standards

The outer diameter of heat exchange tubes specified by American standards is generally 5/8 inches, 3/4 inches or 1 inch, the length is up to 30 feet, and the wall thickness is 0.049 inches to 0.120 inches. The American Standards Association (ASA) standards mainly include A69.1, A450, A250, A213, etc.

（3）European Standards

European standards mainly use millimeter specifications, and commonly used tube diameters are 6mm, 8mm, 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 25mm, 28mm, 30mm, etc. The standards for specifications are EN10216-2, EN10217-2, DIN17175, etc.

（4）Chinese Standards

Chinese standards refer to the specifications of heat exchanger tubes applicable to the domestic scope. Common Chinese standards are:

Standard	Name	Pipe diameter range (mm)	Wall thickness range (mm)
GB/T 24593	Welded steel pipe	10-127	1-10
GB/T 5310	Boiler tube	12-426	2-50
GB/T 8163	Carbon steel seamless pipe	6-426	1-40
GB/T 9948	Stainless steel seamless pipe	6-830	0.5-55

（5）Enterprise standards

Enterprise standards refer to the specifications of heat exchanger tubes applicable to certain specific enterprises. Common enterprise standards include:

Standard	Name	Pipe diameter range (mm)	Wall thickness range (mm)
BAOSTEEL TP347HFG	Seamless alloy steel pipe for boilers and heat exchangers	25-426	2.5-50
Zhejiang Jianli TP304H	Seamless stainless steel pipe for boilers	19-51	2.5-5

（6）Industry standards

Industry standards refer to the specifications of heat exchanger tubes used in a specific industry. Common industry standards include:

Standard	Name	Pipe diameter range (mm)	Wall thickness range (mm)
SH3405	High temperature alloy steel pipe	10-219	1-40
SY/T 0587	Seamless pipe for petroleum cracking	60-630	4-60

2.Different specifications according to different application scenarios

The specifications of heat exchange tubes also vary according to different application scenarios. For example, in the field of steam heat exchange, the tube length is generally 6m or 10m, and the tube diameter is 25mm, 38mm, etc.; in the chemical industry, the tube diameter is generally 19mm, 25mm, 32mm, 38mm, 50mm, 65mm, etc.; in the papermaking field, the tube diameter is generally 19mm, 25mm, 38mm, 50mm, etc. Therefore, when choosing heat exchange tubes, it is necessary to select appropriate specifications according to specific application scenarios.

3.Summary

According to different standards and application scenarios, the specifications of heat exchange tubes will vary and need to be selected according to specific circumstances. In addition, attention should be paid to the material selection, tube spacing, tube length and other issues of the part in direct contact with the tube to ensure the normal operation and heat exchange effect of the heat exchanger.