---
kind: "section"
citation: "46 C.F.R. § 58.30-30"
title: "46"
number: "58.30-30"
heading: "Fluid power cylinders."
url: "https://uscodex.org/cfr/46/58.30-30"
---

# §58.30-30. Fluid power cylinders.

- (a) The requirements of this section are applicable to those hydraulic and pneumatic systems listed in [§ 58.30-1](/cfr/46/58.30-1.md) and to all pneumatic power transmission systems.
- (b) Fluid power cylinders consisting of a container and a movable piston rod extending through the containment vessel, not storing energy but converting a pressure to work, are not considered to be pressure vessels and need not be constructed under the provisions of [part 54](/cfr/46/part54.md) of this subchapter.
- (c) Cylinders must be designed for a bursting pressure of not less than 4 times the maximum allowable working pressure. Drawings and calculations or a certified burst test report must be submitted to show compliance with this requirement.
- (d) Piston rods, except steering gear rams, must be either of corrosion resistant material or of steel protected by a plating system acceptable to the Commandant.
- (e) Materials selection must be in accordance with the requirements of [§ 58.30-15(b)](/cfr/46/58.30-15.md?p=b).

## Notes

### Source

Source: USCG-2020-0634, 89 FR 50179, June 12, 2024, unless otherwise noted.

### Authority

Authority: 43 U.S.C. 1333; 46 U.S.C. 3306, 3703; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; DHS Delegation No. 00170.1, Revision No. 01.4.

### Source

Source: CGFR 68-82, 33 FR 18878, Dec. 18, 1968, unless otherwise noted.