ASTM A192 Serrated Spiral Finned Tube
General Requirements for ASTM A192 Serrated Spiral Finned Tube
ASTM A192 serrated spiral finned tubes are engineered for high-pressure applications requiring enhanced heat transfer efficiency. Complying with ASTM A192 standards for seamless carbon steel boiler tubes, these tubes feature a serrated spiral configuration with precise dimensions for fin pitch, height, and serration depth. Crafted from materials like aluminum or copper, the fins are metallurgically bonded to the base tube, ensuring optimal heat transfer. With smooth surface finishes, corrosion-resistant coatings, and stringent quality control measures, these finned tubes offer reliability and efficiency in a wide range of industrial heating and cooling applications.
1.0 Material Usage:
The ASTM A192 Serrated Spiral Finned Tube material is designated for pressure part fabrication, adhering to all relevant codes and standards outlined in Clause No. 2 of this specification.
2.0 Applicable Codes:
- ASME SECTION I EDITION 2017
- ASME SECTION II PART A SA 192, A 450 EDITION 2017
- ASME SECTION II PART D, EDITION 2017
3.0 Additional Requirements Code/Standards:
- EN10204 3.1
4.0 Mechanical Tests:
Mechanical testing, including Flattening Test, Flaring Test, Hardness Test, and Hydrostatic Test, will be conducted according to ASME SEC II Part A, A 450 Ed. 2017.
5.0 Test Certificate:
Material Test certificate should conform to ASME Sec. II Part A Ed. 2017 & EN10204 3.1 and include details such as Heat Number, Heat analysis, Flaring Test Acceptance, Tensile properties, Hardness Test Values, Flattening test Acceptance, Hydrostatic Test Pressure, and indication of Hot Finished condition.
7.0 Condition of Delivery:
7.1 Tubes may be hot finished or cold drawn, with cold drawn tubes requiring heat treatment at 650℃ or higher temperatures.
7.2 All tubes must be new, free of scale, dirt, grease, paint, or other foreign materials, and appropriately protected with rust preventative coatings during delivery.
8.0 Repairs:
Repair of defects by welding is strictly prohibited.
9.0 Rust Prevention:
All tubes must be safeguarded with rust preventative coatings suitable for withstanding atmospheric corrosion during outdoor storage for a minimum of six months.
10.0 Marking:
Each tube must be clearly marked with ASME: SA 192, Hot Finished indication, Melt No. (Stamped), Supplier’s Name, and Inspection authority’s mark.
11.0 Rejection & Replacement:
11.1 Upon receipt from the manufacturer, each tubing length will undergo inspection. Any tubes failing to meet specification requirements may be subject to rejection based on specified inspection and test methods.
11.2 Tubes must withstand expanding and beading when inserted into the boiler without exhibiting cracks or flaws. Superheater tubes must endure all forging, welding, and beading operations without developing defects.
12.0 Sample Inspection:
The responsibility of sample inspection lies with the supplier.
13.0 Tube Ends:
All tubes must feature square cut ends.
14.0 Mill Sample Test Certificate:
The Mill Sample Test Certificate shall include detailed descriptions of the tubes, such as material, dimensions, and fin details, along with pertinent ASTM A192 Serrated Spiral Finned Tube specifications.
The typical requirements for ASTM A192 serrated spiral finned tubes:
1. Base Tubes:
- Plain Tubes made of Carbon Steel (CS) or ASTM A213 T22 alloy.
- Seamless (SMLS) with plain ends.
- Various outer diameters (OD) and thicknesses (Thk) specified.
2. Finned Sections:
- SMLS tubes with specified diameters and thicknesses.
- Finned lengths of 18000 mm.
- Different fin heights and thicknesses.
- Serrated or solid spiral fins made of either Carbon Steel (CS) or Stainless Steel (SS).
- Fin densities ranging from 120 to 300 fins per meter.
These tubes are designed for use in high-pressure applications requiring efficient heat transfer, and the specifications ensure compliance with ASTM A192 standards and the specific requirements of the intended application.
