Must be ASME B compliant. 9. The manufacturer is to provide a 5 year product warranty. Pressure gauges to be Winters P3S Series or approved. Buy ASME B Pressure Gauges and Gauge Attachments (B – ) from SAI Global. Buy ASME B (R) PRESSURE GAUGES AND GAUGE ATTACHMENTS from SAI Global.
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If the external atmosphere contains corrosive elements, other materials may be required [see Fig. Special ranges are permissible. Receiver gauge dials shall indicate the input pressure range of the gauge. If a liquid medium is n40.100, correction for the difference in liquid head between the standard and the instrument being tested may be necessary.
Contact supplier for actual mounting dimensions panel openings, bolt circle diameter, etc. This method is frequently used where process lines are externally heated.
The nominal gauge sizes are 11? An increase in temperature generally causes an increase in internal case pressure with a resulting decrease in indicated pressure. ASME standards are developed and maintained with the intent to represent the consensus of concerned interests.
These fluids must be avoided where strong oxidizing agents including, but not limited to, oxygen, chlorine, nitric acid, and hydrogen peroxide are involved.
The 26 The gauge shall be tested for accuracy in accordance with para. The operator may develop a false sense of security when the gauge indicates zero or near-zero pressure even though there may be substantial pressure in the system. The fluid viscosity or resistance to flow has an effect upon the speed or response aske the pressure instrument to a pressure change at the diaphragm. Common connections are from 1? It is designed to flex in a direction essentially perpendicular to its surface.
Pressure Gauge ASME B
Specific applications may require design variations with respect to case construction. There are currently no documents on your wish list. Ordering Parameters and Related Standards.
This sag may be prevented by attaching a low pressure source to the process side of the seal to support the diaphragm. Compound pressure gauges shall be tested on pressure portions.
This window material is commonly asne due to its abrasion, chemical, and wear resistance properties.
Bourdon Tube Pressure Gauge
Diaphragm seals with Teflon? Placing a snubber or a restrictor between the pressure connection and the elastic element will not reduce the immediate effect of failure, but will help reduce flow of escaping fluid following rupture and reduce the potential of secondary effects.
Cases may be fabricated from various materials using various manufacturing processes. A maximum stop shall prevent pointer motion beyond a point approximately midway between zsme last and the first dial graduation and shall prevent the pointer from striking an obstruction.
Typical extension lengths are 2 in. No part of this document may be reproduced in any form, in an electronic retrieval system or otherwise, without the prior written permission of the publisher.
For this reason, gauges should not be used for the purpose of indicating the residual pressure in a tank, autoclave, or other similar device that has been seemingly exhausted.
Apply proof pressure to the gauge under test and maintain for 1 min. For a given temperature change, the percentage of error noted on the gauge is a function of the range or span of the gauge. A clamp assembly may fasten the upper housing to the lower housing [see Fig. Outside Diameter [Note 1 ] in. The pressure instrument is attached directly to the diaphragm seal.
The gauge under test shall be secured to the vibration table in the same manner that it will be secured in service. In the case of surface or flush mounting, the panel shall be sufficiently rigid to ensure that its motion will be essentially the same as the motion of the platform of the vibration machine.
Corrosion of the pressure element assembly in the first installation may be sufficient to cause early failure in the second installation. Statistical methods, alternate procedures, or both, may be used when agreed to by the supplier and user. Before conducting the accuracy test, subject the gauge to a pressure equal to the maximum indicated pressure or vacuum.
Failures during pressure testing are unpredictable and may cause parts to be propelled in any direction. Customary units are used primarily in English-speaking countries and are being replaced in most countries by SI units. This does not apply to test retarded or suppressed scale gauges. The standards are vehicles by which the Committee as a body can transmit to users the benefits of their combined knowledge and experience as regards the proper and safe use of pressure gauges. They may have solid fronts or open fronts, and may or may not employ various case pressure relief means.
Weiss, Alternate, Weiss Instruments, Inc. For higher ranges, the percentage of error becomes proportionately less. This effect will be greater on instruments with elements requiring more fluid displacement, with diaphragms having higher volumetric spring rates, and on lower pressure range instruments. A fill fluid should not react adversely with the medium or environment if a leak should occur.
All items shall meet all requirements of section C Record pressure required to activate relief mechanism. The following is a list of compound pressure: Transmit Gas Density Sensors.
Are you an Engineering professional? The maximum number of 20 entries was reached. The difference between the two sets of readings is the position error. Table C-9 lists the four possible connection locations.
If some slight discoloration is observed, additional exposure to the maximum temperature may be desirable, to determine whether further darkening of the fluid, to the point where readability is affected, will occur.
Since this component is not in contact with the process fluid, it is commonly made of steel.