Seamless Carbon Steel Tubing, 0.50 Inch OD, 0.05 Inch Thick, 0.40 Inch ID

You get a maximum working pressure of 1,797 psi on this 1/2-inch line. The burst pressure sits much higher at 10,780 psi, which provides a solid 6:1 safety factor based on the Barlow formula.

For sizing, it is 0.50 inch outside diameter with a 0.049 inch wall, which puts the inside diameter at about 0.402 inch.

For systems where hydraulic shock and mechanical strain are considerable, the working pressure is already calculated using a 6:1 safety factor against the burst pressure of 10,780 psi. If your shock loads are on the severe end, the recommendation is to apply an 8:1 safety factor, which means your actual safe working pressure should be figured lower than the listed 1,797 psi. That rated number assumes the 6:1 factor as a baseline. Size your system accordingly based on how rough the conditions really are.

This tubing is rated to withstand a burst pressure of up to 10,780 psi, as it's made to SAE J1065 standards.