NPFC - F-C-2916

CAPS, VENT, FUEL STORAGE TANK

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Organization: NPFC
Publication Date: 12 June 1997
Status: active
Page Count: 10
scope:

This specification covers four types of fuel storage tank vent caps with screen covered vent openings. The vent cap fits on the vent pipe by means of a threaded inlet or slip-over inlet.

Vent caps covered by this specification shall be of the following types, sizes, and styles as specified (see 6.2).

TYPE Type I - Vapors are directed downward through either two screened outlets or sectionalized outlets. Type II - Vapor recovery vent cap. Vapors are directed upward through a screened circular outlet. Rain is prevented from entering the screened outlet by a rainhood with drain spouts. The cap is equipped with a 0.5-inch (12.7 millimetre (mm)) restricted opening for vapor recovery.

Beneficial comments, recommendations, additions, deletions, clarifications, etc. and any data which may improve this document should be sent to: Commanding Officer (Code 15E2), 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.

Type III - Vapors are directed upward through a screened circular outlet. Rain is prevented from entering the screened outlet by a rainhood with drain spouts. Type IV - Vapor recovery vent cap. Vapors are directed upward through a screened circular outlet. Rain is prevented from entering the screened outlet by a rainhood with drain spouts. The cap is equipped with a spring loaded pressure vacuum poppet for vapor recovery. SIZE Size 1 - For 1.25-inch (32 mm) pipe size (ips) National Pipe Taper Thread (NPT) vent pipe (size 1 not applicable for type IV cap). Size 2 - For 1.5-inch (40 mm) ips NPT vent pipe (size 2 not applicable for type IV cap). Size 3 - For 2-inch (50 mm) ips NPT vent pipe (size 3 not applicable to all types of caps specified herein). Size 4 - For 3-inch (80 mm) ips NPT vent pipe (size 4 not applicable for type IV cap). STYLE Style A - Threaded inlet. Style B - Slip-over inlet.

intended Use:

The types I and III vent caps are intended for venting of fuel storage tanks where vapor recovery is not required. The type I is intended for venting to the atmosphere and venting downward is... View More

Document History

September 6, 2001
CAPS, VENT, FUEL STORAGE TANK
A description is not available for this item.
F-C-2916
June 12, 1997
CAPS, VENT, FUEL STORAGE TANK
This specification covers four types of fuel storage tank vent caps with screen covered vent openings. The vent cap fits on the vent pipe by means of a threaded inlet or slip-over inlet. Vent caps...

References

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