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Norm

ASTM F 1565

Ausgabedatum: 2019 05 01

Standard Specification for Pressure-Reducing Valves for Steam Service

This specification covers self-contained, internally operated, globe style, pressure-reducing valves for use in steam service. In these valves, the downstream pressure fe...
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Herausgeber:
American Society for Testing and Materials
Format:
Digital | 8 Seiten
Sprache:
Englisch
This specification covers self-contained, internally operated, globe style, pressure-reducing valves for use in steam service. In these valves, the downstream pressure feedback is sensed by a spring-loaded diaphragm to position a pilot valve—the pilot valve uses the inlet steam pressure to position the main valve plug via an operating piston. The valves shall be of the following compositions: Composition B made with 1.25% chromium, 0.5% molybdenum and Composition B made with carbon steel. All materials shall be selected to prevent corrosion, galling, seizing, and excessive wear or erosion where applicable. Clearances shall prevent interference as a result of the thermal expansion. Cadmium plating is prohibited. Components of these valves shall include body, bonnet, bottom cover, internal trim, cylinder liner, piston, gaskets, diaphragm, springs, and bolts. Valves will be operated, maintained, and repaired on board ships and shall emphasize simplicity, maintainability, ruggedness, and reliability. Design shall permit access for adjustment and repair when working from either side of the valve and without requiring removal of the valve body from the line. Each production valve shall be subjected to the following tests: nondestructive test, hydrostatic test, seat tightness test, and external leakage test.

ASTM F 1565
2019 05 01
Standard Specification for Pressure-Reducing Valves for Steam Service
Norm
ASTM F 1565
2000
Standard Specification for Pressure-Reducing Valves for Steam Service(Reapproved 2006)
Norm
ASTM F 1565
2013 05 01
Standard Specification for Pressure-Reducing Valves for Steam Service
Norm