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DIFF Subclass Not Allocatable
F17B

GAS-HOLDERS OF VARIABLE CAPACITY (self-acting gas cut-off devices A47J27/62, G05D; flame traps A62C4/00; gas mixers B01F, F16K11/00, G05D11/00; construction or assembling of bulk storage containers employing civil-engineering techniques E04H7/00, gas compressors F04; valves F16K; damping pulsations in valves or pipes F16K, F16L; pipes F16L; stopping devices for gas mains F16L55/10; vessels adapted for storing compressed, liquefied, or solidified gases F17C; gas distribution systems F17D1/04; detecting leakage F17D5/02, G01M; supervising or alarm devices F17D5/02, G08B; control of combustion in burners F23N; gas flow or pressure regulators G05D)

Introduced: September 1968

Description

F17B covers gas storage devices with adjustable or variable internal volume, designed to accommodate fluctuating gas quantities while maintaining controlled pressure conditions. These systems typically employ movable walls, pistons, floating elements, or collapsible chambers to expand or contract based on gas demand and supply. Applications include gas holders for industrial distribution networks, buffer tanks in manufacturing processes, and pressure regulation systems where constant volume storage is impractical. This classification excludes fixed-capacity gas containers and pressure vessels that maintain constant volume (covered by F17C).

Title

Titles differ between systems:

IPC: GAS-HOLDERS OF VARIABLE CAPACITY

CPC: GAS-HOLDERS OF VARIABLE CAPACITY (self-acting gas cut-off devices A47J27/62, G05D; flame traps A62C4/00; gas mixers B01F, F16K11/00, G05D11/00; construction or assembling of bulk storage containers employing civil-engineering techniques E04H7/00, gas compressors F04; valves F16K; damping pulsations in valves or pipes F16K, F16L; pipes F16L; stopping devices for gas mains F16L55/10; vessels adapted for storing compressed, liquefied, or solidified gases F17C; gas distribution systems F17D1/04; detecting leakage F17D5/02, G01M; supervising or alarm devices F17D5/02, G08B; control of combustion in burners F23N; gas flow or pressure regulators G05D)

Full Title

Full titles differ between systems:

IPC:

GAS-HOLDERS OF VARIABLE CAPACITY

CPC:

GAS-HOLDERS OF VARIABLE CAPACITY (self-acting gas cut-off devices A47J27/62, G05D; flame traps A62C4/00; gas mixers B01F, F16K11/00, G05D11/00; construction or assembling of bulk storage containers employing civil-engineering techniques E04H7/00, gas compressors F04; valves F16K; damping pulsations in valves or pipes F16K, F16L; pipes F16L; stopping devices for gas mains F16L55/10; vessels adapted for storing compressed, liquefied, or solidified gases F17C; gas distribution systems F17D1/04; detecting leakage F17D5/02, G01M; supervising or alarm devices F17D5/02, G08B; control of combustion in burners F23N; gas flow or pressure regulators G05D)

IPC and CPC are identically structured here. All 1 subcodes exist in both systems.

1 shared codes have differing titles between IPC and CPC.

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