New Jersey Administrative Code
Title 13 - LAW AND PUBLIC SAFETY
Chapter 20 - ENFORCEMENT SERVICE
Subchapter 53 - STANDARDS FOR ALTERNATIVELY FUELED SCHOOL BUSES
Section 13:20-53.6 - Venting

1. Discharge lines shall be constructed of metal other than aluminum and shall be of a size and so located and maintained as not to restrict the maximum flow of the safety device. Flexible metallic lines shall be used when necessary.

2. The discharge line of a fuel supply container installed inside a compartment shall extend to the outside of the compartment.

3. Discharge lines shall be located as far from the exhaust outlet as is practicable and shall direct escaping gas upward within 45 degrees of vertical. Escaping gas shall not impinge upon fuel supply containers and shall not be directed into wheel wells, at other vehicles in traffic, or at engine air intake inlets.

4. The discharge line from the safety relief valve on all school buses shall be located as per manufacturer's specifications. Means shall be provided to verify that the discharge line is clear.

5. Outlets shall be protected by caps, covers, or other means to keep water or dirt from collecting in the discharge lines. Protective devices shall not restrict the flow of gas.

6. Each discharge line and its connectors shall withstand the pressure caused by the discharge of vapor or liquid from a safety device in the fully-open position.

7. CNG containers may be vented to the outside of the school bus with a flexible bag. Such bag shall be constructed of a material that is nonflammable or self-extinguishing. The bag and attachments shall be capable of withstanding an internal pressure produced by a flow rate of 300 cubic feet per minute with a safety factor of not less than four. The bag shall be shielded or installed in a protected location to prevent damage from unsecured objects or abrasion.