1、_ HydraulicS 2000 - 2003 By downloading this document you acknowledge acceptance of our Terms and Conditions of Use PRESSURE RATING OF HYDRAULIC TUBING Burst pressure There a three commonly used formulas for calculating the burst pressure of seamless hydraulic tubing: Barlow formula P = 2 T SD Board
2、man formula P = 2 T S D (0.8 T) Lame formula P = S (D d)(D + d) Where P = burst pressure in psi T = nominal wall thickness of tubing in inches S = minimum ultimate tensile strength of tube material in psi D = nominal outside diameter of tubing in inches d = nominal inside diameter of tubing in inche
3、s Working pressure Once the burst pressure of the tube has been calculated, working pressure is calculated using the following formula: WP = P sf Where WP = working pressure in psi P = burst pressure in psi sf = design safety factor (3 minimum recommended)_ HydraulicS 2000 - 2003By downloading this
4、document you acknowledge acceptance of our Terms and Conditions of Use 2 Reference working pressures The following table lists working pressures in psi of seamless steel tube calculated using Barlows formula, based on a minimum ultimate tensile strength of 50,000 PSI and a design safety factor of 4:
5、1: Nominal tube wall thickness (in.) Nominal tube OD (in.) 0.028 0.035 0.049 0.065 0.083 0.095 0.109 0.120 0.134 1/8 0.125 5600 7000 3/16 0.188 3750 4650 1/4 0.250 2800 3500 4900 6500 5/16 0.312 2250 2800 3900 5200 3/8 0.375 1850 2350 3250 4350 1/2 0.500 1750 2450 3250 4150 5/8 0.625 1400 1950 2600
6、3300 3800 3/4 0.750 1150 1650 2150 2750 3150 3650 7/8 0.875 1000 1400 1850 2350 2700 3100 1 1.000 875 1200 1600 2050 2350 2700 3000 1-1/8 1.125 1100 1450 1850 2100 2400 2650 1-1/4 1.250 1000 1300 1650 1900 2200 2400 1-1/2 1.500 1100 1400 1600 1800 2000 1-3/4 1.750 925 1200 1350 1550 1700 2 2.000 800 1050 1200 1350 1500 1650 Hydraulic Secrets Revealed! Click here to learn more
