|MATERIAL||STANDARD (see Chapter 15)|
|Copper or copper-alloy pipe and fittings||ASTM B42; ASTM B43; ASTM B302; ASTM F3226|
|Copper or copper-alloy tubing and fittings (Type K, L or M)||ASME B16.51; ASTM B75; ASTM B88; ASTM B280; ASTM F3226|
|Labeled pipe||(See Section 1302.4)|
|Nonmetallic pipe||ASTM D2996|
|Steel and stainless steel pipe and fittings||ASTM A53; ASTM A106; ASTM A312; ASTM F3226|
|Steel and stainless steel tubing and fittings||ASTM A254; ASTM A269; ASTM A539; ASTM F3226|
Liquid fuel vent pipes shall terminate outside of buildings at a point not less than 2 feet (610 mm) measured vertically or horizontally from any building opening. Outer ends of vent pipes shall terminate in a weatherproof vent cap or fitting or be provided with a weatherproof hood. Vent caps shall have a minimum free open area equal to the cross-sectional area of the vent pipe and shall not employ screens finer than No. 4 mesh. Vent pipes shall terminate sufficiently above the ground to avoid being obstructed with snow or ice. Vent pipes from tanks containing heaters shall be extended to a location where oil vapors discharging from the vent will be readily diffused. If the static head with a vent pipe filled with oil exceeds 10 pounds per square inch (psi) (69 kPa), the tank shall be designed for the maximum static head that will be imposed.