ASME B16.44:2002 pdf download MANUALLYOPERATED METALLIC GAS VALVES FOR USEIN ABOVEGROUND PIPING SYSTEMS UP TO 5 PSI
1 SCOPE
1.1 General
This Standard applies to neww valve construction andcovers quarter turn manually operated metallic valvesin sizes NPS 4% and tubing sizes 1% ODThese valvesare intended for indoor installation as gas shutoff valveswhen installed in aboveground fuel gas piping down-stream of the gas meter outlet and upstream of the inletconnection to a gas appliance. The valves covered bythis Standard are intended for service at temperaturesbetween 32F(0C) and 125F(52C)at pressure ratingsnot to exceed 5 psi (0.34 bar). When so designated by themanufacturer, these valves may be installed for serviceoutdoors and/or at temperatures beloww 32°F(0°C)andor above 125°F(52°C).
1.2 Applicability
This Standard sets requirements, including qualifica-tion requirements, for metallic gas valves for use in gaspiping systems. Details of design, materials, and testingin addition to those stated in this Standard that arenecessary to meet the qualification and production testing requirements of this Standard remain the responsi-bility of the manufacturer. A valve used under a codeurisdiction or governmental regulation is subject to anyimitation of such code regulations
1.3 Limitations
This Standard does not apply to manually operatedgas valves that are an integral part of a gas applianceManually operated gas valves intended for use in aparticular appliance are covered in the AmericanVational Standard/Canadian Gas Association Standardfor Manually Operated Gas Valves for AppliancesAppliance Connector Valves,and Hose End ValvesANSI Z21.15/CGA 9.1.
1.4 Convention
For the purpose of determining conformance withthis Standard, the convention for fixing significant digitswhere limits,maximum and minimum values,are specified by “rounding off” as defined in ASTM Practice E29. This requires that an observed or calculated value shall be rounded off to the nearest unit in the last right-hand digit used for expressing the limit. Decimal valuesand tolerances do not imply a particular method of measurement.
1.5 Quality Systems
Requirements relating to the product manufacturer’sQuality System Programs are described in Nonmandatory Annex A.
1.6 Units
The values stated in either inch units or metric unitsare to be regarded separately as standard. The valuesstated in each system are not exact equivalents; thereforeeach system must be used independently of the other.Combining values from the two systems may result in
non-conformance with the standard.All pressures, unless otherwise specified, are gaugepressures.
2 GENERAL CONSTRUCTION AND ASSEMBLY
2.1 General
Each valve at the time of manufacture shall be capableof meeting the requirements set forth in this StandardThe workmanship emploved in the manufacture andassembly of each valve shall provide for the specifiedgas tightness, reliability of performance, freedom frominjurious imperfections, and defects as specified herein
22 End Connections
The valve body shall be provided with wrench flatsat ends with tapered pipe threads.
2.3 Pipe and Tubing Connections
2.3.1 Taper Pipe Threads. Taper pipe threads, whenprovided,shall be in accordance with ASME B1.20.1.
2.3.2 Flare Tubing Connection. Valves with an inletand/or outlet for ,, or % O.D. tube shall be in accordance with the flare fitting dimensions shown in Tablel. Other flare sizes shall be made per manufacturer’sstandards.
2.4 Operating Head
The operating head of the valve shall be a lever, teeflat, or square head type. Separately attached handles
ASME B16.44:2002 pdf download
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