1. Q: What is "Galvanized" pipe? Is it seamless?
A: Galvanizing is a zinc coating for corrosion protection. Standard galvanized pipe (ASTM A53) is usually welded. Seamless pipes are rarely hot-dip galvanized due to potential dimensional issues but can be.
2. Q: Can you supply pipes for high-pressure gas cylinders?
A: Yes, using specific grades like 30CrMo, 34CrMo4, or 4130, which are alloy steel grades for seamless gas cylinders (e.g., ISO 9809-1, DOT-3AA). They require precise heat treatment.
3. Q: What is "Bearing Steel Tube"?
A: Seamless tubes made from high-carbon chromium steel (e.g., SAE 52100, ASTM A485) for manufacturing ball and roller bearings, requiring high purity and uniform hardness.
4. Q: How do I choose between A106 Gr. A, B, and C?
A: Choose based on required tensile/yield strength. Gr. B (most common) offers a good balance. Gr. C has higher strength. Gr. A has the lowest strength and is less common.
5. Q: What is your typical lead time and MOQ?
A: Lead time depends on grade, size, and quantity. For common A106 B, it can be 30-45 days ex-mill. MOQ is typically one bundle (2-5 tons) for standard items, but we can be flexible.
