---
kind: "range"
citation: "46 C.F.R. §§ 76.17-5–76.17-20"
title: "46"
from: "76.17-5"
to: "76.17-20"
count: 4
url: "https://uscodex.org/cfr/46/76.17-5..76.17-20"
---

# §76.17-5. Quantity of foam required.

- (a) **Area protected.**
  - (1) For machinery and similar spaces, the system shall be so designed and arranged as to spread a blanket of foam over the entire tank top or bilge of the space protected. The arrangement of piping shall be such as to give a uniform distribution over the entire area protected.
  - (2) Where an installation is made to protect an oil fired boiler installation on a flat which is open to or can drain to the lower engine room or other space, both the flat and the lower space shall be protected simultaneously. The flat shall be fitted with suitable coamings on all openings other than deck drains to properly restrain the oil and foam at that level. Other installations of a similar nature will be considered in a like manner.
  - (3) Where a system is installed to protect a tank, it shall be so designed and arranged as to spread a blanket of foam over the entire liquid surface of the tank within the range of usual trim. The arrangement of piping shall be such as to give a uniform distribution over the entire area protected.
- (b) **Rate of application.**
  - (1) For spaces other than tanks, the rate of discharge to foam outlets protecting the hazard shall be at least as set forth in this subparagraph.
    - (i) For chemical foam systems with stored “A” and “B” solutions, a total of at least 1.6 gallons per minute of the two solutions shall be discharged for each 10 square feet of area protected.
    - (ii) For other types of foam systems, the water rate to the dry powder generators or air foam production equipment shall be at least 1.6 gallons per minute for each 10 square feet of area protected.
  - (2) For tanks, the rate of discharge to foam outlets protecting the hazard shall be as set forth in [paragraph (b)(1)](#b-1) of this section except that the value of 1 gallon per minute shall be substituted in both cases for the value of 1.6 gallons per minute.
- (c) **Supply of foam producing material.**
  - (1) There shall be provided a quantity of foam producing material sufficient to operate the equipment at the discharge rate specified in [paragraph (b)](#b) of this section for a period of at least 3 minutes for spaces other than tanks, and for at least 5 minutes for tanks.
  - (2) **A separate supply of foam agent need not be provided for each space protected.** The total available supply shall be at least sufficient for the space requiring the greatest amount.
  - (3) Where pumps are required, the water supply shall be from outside the space protected and shall in no way be dependent upon power from the space protected.

# §76.17-10. Controls.

- (a) The foam agent, its container, and all controls and valves for the operation of the system shall be of an approved type.
- (b) The foam agent container and all controls and valves for the operation of the system shall be outside the space protected and shall not be located in such space as might be cut off or made inaccessible in the event of fire in any of the spaces protected. The control space shall be as convenient as practicable to one of the main escapes from spaces protected, and shall be marked as required by [§ 78.47-17](/cfr/46/78.47-17.md) of this subchapter. Where pumps are required, it shall not be necessary that they be started from the control space.
- (c) Complete, but simple instructions for the operation of the system shall be located in a conspicuous place at or near the controls.
- (d) The valves to the various spaces served shall be marked as required by [§ 78.47-15](/cfr/46/78.47-15.md) of this chapter.

# §76.17-15. Piping.

- (a) All piping, valves, and fittings shall meet the applicable requirements of subchapter F (Marine Engineering) of this chapter.
- (b) All piping, valves, and fittings of ferrous materials shall be protected inside and outside against corrosion unless specifically approved otherwise by the Commandant.
- (c) All piping, valves, and fittings shall be securely supported, and where necessary, protected against injury.
- (d) Drains and dirt traps shall be fitted where necessary to prevent the accumulation of dirt or moisture.
- (e) Piping shall be used for no other purpose.

# §76.17-20. Discharge outlets.

- (a) Discharge outlets shall be of an approved type.
- (b) [Reserved]