**Burst Pressure Data**

Burst pressures can be calculated by the following formula:

**P=2T x S divided by O.D.**

**P** = Burst Pressure PSI | **T** = Tubing Wall Thickness** | O.D. **= Outside Diameter of tubing

**= Ultimate Strength of Material (32,000 PSI for copper / 47,000 PSI for brass)**

S

S

**Note:**Working PSI @ 6-safety factor of 6:1 | Working PSI @ 8-safety factor of 8:1

**Tube Length Information**

**A. Mill Lengths:** Certain uniform lengths subject to established tolerances with short lengths included according to established agreement with customer.

**B. Random Lengths:** Run of mill lengths without any indicated preferred length, subject to customer approval.

**C. Specific Lengths:** Indicated uniform lengths, subject o established length tolerances (for example: 12′ – 0″, 9′ – 7″, or 0′ – 4 1/2″ os a specified length). Unless specified otherwise, tolerances are per ASTM B251.

**Weight Per Foot**

To determine Weight (WT) per linear foot of a seamless tube, when Outside Diameter (O.D.) is given:

**A.** Subtract Wall Thickness (T) from O.D., then multiply by wall thickness. **(O.D. – T) x T = Z**

**B.** Using figure obtained from above (Z), multiply by 11.5736 for brass or 12.1768 for copper**.
**

**For Brass:**Z x 11.5736 = WT per linear foot of a brass seamless tube

**For Copper:**Z x 12.1768 = WT per linear foot of a copper seamless tube

**Additional Weight Formulas**

**D** = Diameter | **D.A.** = Density of Alloy |** I.D.** = Inside Diameter |

**O.D.**= Outside Diameter

**T**= Wall Thickness or Thickness |

**WT**= weight |

**W**= width

**ROUND ROD**

Square of D x 9.42 x DA = WT per lineal foot in pounds.

**SQUARE BAR**

Square of One Side x 12 x DA = WT per lineal foot in pounds.

**HEXAGON ROD**

Square of Distance Across Flats x 10.4 x DA = WT per lineal foot.

**RECTANGULAR BAR**

T x W x 12 x DA = WT per lineal foot in pounds.

**ROUND TUBE**

37.7 x DA x T x OD – T = WT per lineal foot in pounds.

**SQUARE TUBE**

1.27 X WT of a round tube of the same wall thickness, and of D equal to the distance across the flats of the square tube = WT per lineal foot.

**SHEET**

T x 144 x DA = WT per square foot in pounds.

**STRIPS AND ROLLS**

T x W x 12 x DA = WT per lineal foot in pounds.

**CIRCLES**

Square of D x T x 0.785 x DA = WT of a circle.

**RINGS**

O.D. + I.D. x O.D. – I.D. x T x 0.785 x D.A. = WT of ring in pounds.