ASME B16.33:2002 pdf free download

ASME B16.33:2002 pdf free download.MANUALLY OPERATEDMETALLIC GAS VALVES FORUSE IN GAS PIPING SYSTEMS UP TO125 PSI.
(b) when the valve requires more than 1/4 turn to operate valve. turning direction to open or close the valve.
2.3.2 Valve End. Valve ends shall comply with the following standards where applicable:
(a) ASME Bl.20.1 Pipe Threads;
(b) ASML 1116.1 Cast Iron Flanges and Flanged Fittings; and
(C) ASME B 16.5 Stcd Pipe Flanges and Flanged Fittings.
2.4 Marking
2.4.1 General. Escept as may be modilled herein. valves shall be marked as required in MSS SP-25 and shall include the following requirements.
2.4.1.1 Name. The manufacturer’s name or trademark and, where space permits, the designation “1116.33”. The B 16.33 mark is the manufacturcr’s acknowledgement that the valve was manufactured in contirmance with ASME B 16.33.
2.4.1.2 Pressure Rating. Marking for pressure ratings such as 60G. 125G. etc.. may be shown on the head, stem, or bxly.
2.4.1.3 Tamper-Proof. The designation T’ for tamper-proof construction where tamper-proof features are not easily identifiable without disassembling the valve. This designation may be shown on the head or stein.
2.5 Lubrication (Sealant)
Valves which require pressure lubrication (by the injection of lubricant through fittings to the sealing surface of the valve) shall be capable of being lubricated rhile subjected to the pressure rating. Compliance with this provision can be met if lubrication can be accomplished with the valve in both the fully opened and fully closed positions. The design must be such as to minimize entry of lubricant into the gasway when lubricated in accordance with the manufacturer’s instruction.
3MATERIALS
3.1 Metallic Materials for Valve Parts
Metallic materials known to be acceptable for compli-ance with this Standard are listed in Table 1. Othermetallic materials may be used when the product incor-porating them meets the requirements of this Standard.3.2 Lubricants,Sealants,and Seating
Materials
3.2.1 Lubricants and Sealants. Lubricants and/or sealants shall be resistant to the action of fuel gasessuch as natural,manufactured,and LP gases.Thevalve manufacturer is responsible for the selection oflubricants and sealants,and for the determination oftheir suitability for the service conditions specified inthe scope of this Standard.
3.2.2 Seating and Stem Seal Materials. Thevalve manufacturer is responsible for selection of seatingand stem seal materials and for determination of theirsuitability for the service conditions specified in thescope of this Standard.
3.2.3 Elastomer Components
3.2.3.1 Air Aging Tests. Elastomer parts thatare exposed to fuel gas shall be made from materialsthat，following 70 hr air aging in accordance withASTM D 573 at 212°F (100°C),meet elongation,tensile，and hardness property requirements a follows:Tensile tests shall be conducted on six dumbbells inaccordance with ASTM D 412.