An hose sizes are based on the nominal od of the tubing with a matching id. Aka below deck rating.

Fuel Line Size Vs Pressure Drop
Fuel hose sizes chart. Hg for ½ inch diameter hose. They have a fire resistant covering on the outside. Using your automotive hose size choose from the chart below to find the an equivalent for hose hose ends and adapter fittings. Pipe sizing charts a reference chart for propane tank pipe sizes it is best to always consult a qualified and certified technician to advise on the best piping that is needed for your propane tank to properly fuel your appliancesprovided here is a guide for more information for you to refer to. A liter of fuel weighs about 16 lbs. Are used for the fuel tank vent hose below the deck.
Are used for feeding fuel from the boat fuel tank to the fuel filter bracket or the engine. Hg for 716 inch and smaller inside diameter sizes 10 in. The an size number is correctly displayed with a dash before the number. Will increasing the line size to ½ help. It sounds convoluted but it really is a simple idea that achieves a logical goal. You need the minimum flow rate at your fuel systems operating pressure.
What you need to know about copper piping with your propane tank. The size of the fuel line is determined by the outside diameter. Fuel line is a petroleum resistant nitrile tube with a covering that resists weathering ozone and heat and can be used for ethanol laced fuels and diesel fuel. It is important to have the right size so the vehicle operates efficiently. Standard neoprene fuel hose can be used for fuel pcv and eec systems on all vehicles where working pressures are under 50 psi or vacuum ratings are under 24 in. A 38 standard hose equals 6 an.
For carburetors this is between 4 75 psi. 16 15625 lph. Male an adapter identification chart the line drawings below depict actual sizes of the various common an thread sizes by dash number. If hoses were called out using the hose od following the same system used for tubing the id of a 38 hose would be much smaller than the id of a 38 tube. Popular fuel line sizes. Fuel injection will usually be between 35 65 psi.
The fuel line along with the other parts of a fuel system are responsible for delivering the fuel from the fuel cell into the carburetor. Completing the measurement is simple and takes relatively few tools. They have the least permeable rating and are designed to have fuel in them at all times. Fuel pumps are usually advertised by their. To get lph divide lbshr. Yes the pressure drop thru a ½ line is a nominal 5 feet versus 35 feet for the 38 id fuel line.
The ½ line will result in a ½ pound drop versus the 3 pound drop for the 38 line at the stated flow of 833 gph enough to support 1000 hp at a bsfc of 5. For example an an size 2 designates a tube od of 18 2 x 116 the tube od of an size 3 is 316 3 x 116. 6an 38 od 8an 12 od 10an 58 od 12an 34 od.