HYDRAULIC FLUID LINE BURST PRESSURES
(Barlow’s Formula)
P = (2ST÷D) (45,000 PSI Min Tensile)
P = Burst Pressure
S = 45,000 lbs. PSI Tensile Strength
T = Nominal Wall Thickness
D = Outside Diameter
1/4″ x 0.035 – 12,600 | 5/8″ x 0.083 – 11,950 | 1-1/8″ x 0.065 – 5,200 | ||
1/4 x 0.049 – 17,640 | 3/4 x 0.035 – 4,200 | 1-1/8″ x 0.083 – 6,640 | ||
5/16″ x 0.035 – 10,080 | 3/4″ x 0.049 – 5,880 | 1-1/8 x 0.95 – 7,600 | ||
5/16 x 0.049 – 14,110 | 3/4 x 0.065 – 7,800 | 1-1/8 x 0.109 – 8,720 | ||
3/8″ x 0.035 – 8,400 | 3/4″ x 0.083 – 9,960 | 1-1/4″ x 0.065 – 4,680 | ||
3/8 x 0.049 – 11,760 | 3/4 x 0.095 – 11,400 | 1-1/4 x 0.083 – 5,975 | ||
3/8″ x 0.065 – 15,600 | 3/4″ x 0.109 – 13,080 | 1-1/4 x 0.095 – 6,840 | ||
7/16 x 0.035 – 7,200 | 7/8 x 0.049 – 5,040 | 1-1/4″ x 0.109 – 7,848 | ||
7/16″ x 0.049 – 10,080 | 7/8″ x 0.065 – 6,685 | 1-1/4 x 0.120 – 8,640 | ||
7/16 x 0.065 – 13,370 | 7/8 x 0.083 – 8,535 | 1-1/2″ x 0.083 – 4,980 | ||
1/2″ x 0.035 – 6,300 | 7/8″ x 0.095 – 9,770 | 1-1/2 x 0.095 – 5,700 | ||
1/2 x 0.049 – 8,820 | 1″ x 0.049 – 4,410 | 1-1/2″ x 0.109 – 6,540 | ||
1/2″ x 0.065 – 11,700 | 1″ x 0.065 – 5,850 | 1-1/2 x 0.120 – 7,200 | ||
5/8 x 0.035 – 5,040 | 1″ x 0.083 – 7,470 | 2″ x 0.134 – 6,030 | ||
5/8″ x 0.049 – 7,055 | 1″ x 0.095 – 8,550 | 2″ x 0.188 – 8,460 | ||
5/8 x 0.065 – 9,360 |
Note: To compute safe working pressures, above Burst Pressures should be divided by your desired safety factor.