NPFC - WW-C-2928
CAPS, FUEL STORAGE TANK
|Publication Date:||17 January 1997|
This specification covers general purpose lock type caps for fuel oil and gasoline storage tanks.
Cap shall be of the following types, sizes, and styles, as specified (see 6.2).
TYPES Type I - Internal pipe thread for fill-pipe connection. Type II - External pipe thread for fill-pipe connection. SIZES Size 1 - 2-inch (51 millimetre (mm)) iron pipe size (ips), National Pipe Taper Thread (NPT). Size 2 - 3-inch (76 mm) ips NPT. Size 3 - 4-inch (102 mm) ips NPT. STYLES Style A - Vented. Style B - Air tight.
Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data which may improve this document should be sent to: Commanding Officer (Code 1581), Naval Construction Battalion Center, 1000 23rd Avenue, Port Hueneme, CA 93043-4301, by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.
The caps are intended for use on diesel, gasoline, and jet fuel storage tank fill, pipes. The style A vented cap is primarily for diesel fuel. The style B air-tight caps are for gasoline or jet... View More
The caps are intended for use on diesel, gasoline, and jet fuel storage tank fill, pipes. The style A vented cap is primarily for diesel fuel. The style B air-tight caps are for gasoline or jet fuel. The caps are also intended to provide some security to prevent tampering with fuel supplies; reduce fire hazards, fuel contamination, and vapor emission.View Less