Question 1

How do I account for tube wall thickness tolerance?

Accepted Answer

ASTM specifications allow ±10% wall thickness variation. For conservative weight estimates, use nominal wall thickness. For maximum weight (shipping), use nominal wall + 10%. For minimum weight (structural design), use nominal wall − 10%. Request mill test reports for actual measured wall thickness on critical orders.

Question 2

Does tube weight affect machining parameters?

Accepted Answer

Yes. Heavy tubes require more support to prevent chatter during turning. As a rule of thumb, tubes with wall thickness below 1/8 of OD require steady rests or filler material during machining to prevent vibration. Light-gauge tubes (wall

Question 3

How do I calculate remaining tube length from weight?

Accepted Answer

Weigh the tube, subtract the weight of any attachments or end caps, and divide by the weight per foot for the specific OD and wall thickness. A 5-ft piece of 2-inch Schedule 40 steel pipe weighs approximately 5 × 3.65 = 18.25 lbs. If you have 12.4 lbs remaining: 12.4 / 3.65 = 3.4 feet remaining.
⚡ Calculated for Carbide-Tooling.com High-Performance Series. View Catalog →

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