§ 56.60-15 - Ductile iron.

§ 56.60-15 Ductile iron.

Cross Reference

Link to an amendment published at 89 FR 50153, June 12, 2024.

(a) Ductile cast iron components made of material conforming to ASTM A 395 F1155 (incorporated by reference, see 46 CFR § 56.01-2) may be used within the service restrictions and pressure-temperature limitations of UCD-3 of section Section VIII of the ASME Boiler and Pressure Vessel Code BPVC (incorporated by reference; see 46 CFR § 56.01-2).

(b) Ductile iron castings conforming to ASTM A 395 (incorporated by reference, see § 56.01-2) F1155 may be used in hydraulic systems at pressures in excess of 7500 kilopascals kPa (1000 pounds per square inchpsi) gage, provided the following:

(1) The castings receive a ferritizing anneal when the as-cast thickness does not exceed one 1 inch;

(2) Large castings for components, such as hydraulic cylinders, are examined as specified for a casting quality factor of 90 percent in accordance with UG-24 of section Section VIII of the ASME Boiler and Pressure Vessel CodeBPVC; and

(3) The castings are not welded, brazed, plugged, or otherwise repaired.

(c) After machining, ductile iron castings must be hydrostatically tested to twice their maximum allowable working pressure and must show no leaks.

(d) Ductile iron castings exhibiting less than 12 percent elongation in 50 millimeters (2 inches) when subjected to a tensile test must meet the requirements for cast iron in this part.

[CGD 77-140, 54 FR 40612, Oct. 2, 1989, as amended by CGD 95-027, 61 FR 26001, May 23, 1996; USCG-2000-7790, 65 FR 58460, Sept. 29, 2000; USCG-2003-16630, 73 FR 65183, Oct. 31, 2008; USCG-2020-0634, 89 FR 50153, June 12, 2024]