Class 5 Boiler Practice Exam

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In ASTM A-58-F pipe specification, what does the 'F' represent?

Furnace welded
Field welded
Flanged
Fabricated

The correct answer is: Furnace welded

In the ASTM A-58-F pipe specification, the 'F' denotes that the pipe is "furnace welded." This specification indicates that the welding process used to join the pipe materials involves heating the edges to be fused in a controlled environment, typically within a furnace. This process ensures a strong, reliable bond by allowing the metallurgical properties of the materials to be enhanced during the heating and welding process. Understanding the significance of the 'F' is crucial for selecting the appropriate type of pipe for various applications, particularly where specific welding characteristics are needed for strength and integrity. The other options pertain to different welding or fabrication methods but do not reflect the meaning of 'F' in this specific context.