USPS Packaging Instruction 2E

Audible Fire Alarm Systems

An audible fire alarm system powered by a compressed gas is mailable only in domestic mail via surface transportation provided that the system qualifies as a Limited Quantity surface material and all applicable requirements in 342 are met.

Proper Shipping Name

• Consumer Commodity.

ID Number

• Various (see Appendix A).

Mailability

• International Mail: Prohibited.
• Domestic Mail: Permitted only via surface transportation.

Required Packaging

Primary Receptacle

• The content of the primary receptacle is a nonflammable, nonpoisonous, or noncorrosive gas.
• The gas is contained within a metal primary receptacle that has a capacity of 19.3 fluid ounces (35 cubic inches) or less, does not exceed a pressure of 70 psig at 70° F, and is not completely filled at 130° F.
• Each nonrefillable primary receptacle must be designed to withstand a burst pressure of not less than 4 times its charged pressure at 130° F.
• Each refillable primary receptacle must be designed to withstand a burst pressure of not less than 5 times its charged pressure at 130° F.

Cushioning Material

• The primary receptacle must be surrounded by sufficient cushioning material to absorb shock and prevent breakage.

Outer Packaging

• Strong outer packaging that is capable of firmly and securely holding the primary receptacle and cushioning is required.
• Multiple primary receptacles may be securely packed within a single outer packaging up to a weight limit of 25 pounds (11.325 kg) per mailpiece.

Marking

Labels and markings must be placed on the address side of the mailpiece unless specified differently in 221.1 and 325.1.

• The outer packaging must bear an approved DOT Limited Quantity surface mark designating surface transportation, prepared under 342.4c.
• A complete return and delivery address must be used.