---
kind: "section"
citation: "33 C.F.R. § 183.586"
title: "33"
number: "183.586"
heading: "Pressure impulse test."
url: "https://uscodex.org/cfr/33/183.586"
---

# §183.586. Pressure impulse test.


A fuel tank is tested by performing the following procedures in the following order:

- (a) Perform the static pressure test under [§ 183.580](/cfr/33/183.580.md).
- (b) If the tank is non-metallic, fill it to capacity with a gasoline that has at least a 50 percent aromatic content. Keep the fuel in the tank at 21 °C or higher for 30 days prior to testing.
- (c) **Mount the tank on a test platform.**
- (d) **Fill the tank to capacity with water.**
- (e) **Cap and seal each opening in the tank.**
- (f) Apply 25,000 cycles of pressure impulse at the rate of no more than 15 impulses per minute varying from zero to three PSIG to zero inside the tank top from a regulated source of air, inert gas, or water.
- (g) Perform the static pressure test under [§ 183.580](/cfr/33/183.580.md).

## Notes

### Source

Source: CGD 74-209, 42 FR 5950, Jan. 31, 1977, unless otherwise noted.

### Authority

Authority: 46 U.S.C. 4302; Pub. L. 103-206, 107 Stat. 2439; and Department of Homeland Security Delegation No. 0170.1, para. II, (92)(b). Subpart E is also authorized by Pub. L. 114-120, 130 Stat. 27

### Source

Source: CGD 72-61R, 37 FR 15782, Aug. 4, 1972, unless otherwise noted.