1. Q: Name a standard and grade for electric-resistance-welded (ERW) steel pipe for pressure applications.
A: ASTM A134 (typically Grade A, but other ASTM grades can be specified) or the ERW type under ASTM A53 Grade B.
2. Q: What is the primary standard for seamless cold-drawn carbon steel feedwater heater tubes?
A: ASTM A556. Common grades are A556 Grade A2 (C-Mn steel, normalized) and Grade B2 (C-Mn steel, stress-relieved).
3. Q: Which ASTM standard covers continuous welded (CW) wrought-iron pipe? Is it common?
A: ASTM A72. It is for low-pressure applications like drainage and is less common than welded or seamless types.
4. Q: What is a key characteristic of steel for ASTM A120 pipe (historical standard)?
A: It was a general-purpose standard largely replaced by A53/A106. It did not mandate specific grades like modern specs.
5. Q: For structural tubing with enhanced atmospheric corrosion resistance, what ASTM grade might be used?
A: ASTM A847 (cold-formed welded and seamless). It is a high-strength low-alloy (HSLA) steel with improved corrosion resistance.
