Brochure: Daniel Meter Tubes - Emerson

1 Meter TubesEMERSON. CONSIDER IT , Quality Instruments for Natural Gas and Oil Measurement SolutionsWhat is a Meter Tube?A Meter Tube consist of an orifice Fitting ( Daniel Senior,Junior, Simplex or orifice flange union ), a length of pipeupstream of the fitting and a corresponding length of pipedownstream of the fitting. There is also, in most cases, aflow conditioner ( Daniel Flow Conditioning Plate or 19 Tube Concentric Bundle) upstream of the orifice aswell. When fluid (gas or liquid) flows throughthe orifice opening, a pressure dropoccurs.

2 Flow rate is proportional tothe square root of pressure differential. Flow volume is determined by integrating flowrate, and is typically correctedto standard conditions with an associated flow Instruments or Fabricated Pipe?The difference is .. Daniel Meter TubesInstruments You Can TrustDaniel Meter Tubes are more than just fabricated pipe with an orifice fitting. They are accurate, dependable instruments because of Daniel s dedicated approach to quality. Extra steps taken duringevery phase of Meter tube design and production separate Daniel Meter Tubes from all the from Daniel sit on the boards of more professional standards organizations than any other manufacturer in the oil and gas transmission Experienced "code qualified" welders, use internal jigs to insure smooth inlet and outlet surfaces.

3 Andexpert grinding by quality oriented craftsmen all contribute to the highest quality on each and everymeter tube and expertise in designing a wide variety of applications insures that the proper length oftube, type of flow conditioner and orifice fitting will be exactly what is needed for accurate flow measurement. The BasicsDaniel s Meter Tube Instrumentation:Alignment - Meter Tubes using Senior orJunior orifice fittings and Simplex plate holdersin 150 and 300# ANSI ratings are supplied witha dowel pin alignment feature at the fitting tometer tube connection.

4 600# and higher ratedtubes use a special, close tolerance largemale/female flange alignment method. Eithermethod insures that the bores of both tubesections are matched without offsets. Tubesusing orifice flanges utilize a knock-out dowelpin feature to align both pipe sections and center the orifice plate within the Each Meter tube is suppliedwith one " and one " branch connection onthe downstream for thermowell or other connections are available Each Meter tube is hydrostaticallytested after manufacture. Each orifice fitting istested for tap hole and orifice plate seal integrity after the Meter tube has been pressure Selection: Daniel uses special colddrawn seamless tubing or honed pipe in the fabrication of Meter Tubes .

5 The strict requirements for internal roundness and surfacefinish preclude the use of standard commercialpipe in most cases. Daniel maintains a largeinventory of this special pipe to rapidly completeyour 2 Section Meter Tube with Tube Bundle Flow Straightener All Daniel standard two section Meter Tubes are availablewith any style Senior or Junior orifice fitting, Simplex plateholder or orifice flange union . Each tube contains anupstream of the minimum length prescribed by API ,with a line mounted 19 tube concentric tube bundle flowstraightener per the standard.

6 Each downstream has oneeach " and " branch connection for thermowell orother uses. Upstream lengths are the minimum recommended by table 2-8b for use with plates up beta ratio for installation in any piping downstream is extra long to allow for the installationof additional branch connections in the field, if ends are standard. Optional ends available 3 Section Meter Tube with Tube Bundle Flow Straightener The 3-section assembly contains an inlet spool of theminimum length prescribed by the standard. Thesecond section begins with a concentric, flange mountedtube bundle meeting the 2000 API requirements anda " thick spacer plate to ease tube removal for inspection.

7 The outer end of section 2 contains the orificeflange or fitting. The third or downstream section followsand contains 2 branch connections. Other or additionalconnections can be supplied in this section on upstream lengths are in compliance with API 2-8b minimum for up to .67 beta ratio and can beused in any piping configuration. Downstream sectionsare extra long to allow for the addition of extra branchconnections in the field, if desired. The standard metertube has flanged outer ends. Other end connections areavailable on Meter Tube with Daniel Flow ConditionerThe three section Meter tube with Daniel FlowConditioner contains an inlet spool of the minimumlength determined during testing to the API standard.

8 The flange union between the first andsecond sections contains the Flow Conditioner and a " thick spacer plate to facilitate tube removal for inspection. The outer end of section 2 contains theorifice flange or fitting. The third or downstream section follows and contains 2 branch or additional connections can be supplied inthis section on request. The upstream lengths wereestablished during testing of the device in accordancewith the test requirements. These Meter tubesare for use in any piping configuration with beta ratiosto .67.

9 Downstream sections are extra long to allowfor the addition of extra branch connections in thefield, if desired. The standard Meter tube has beveledouter ends. Flanges or other end connections areavailable on Meter TubeDaniel Flow Conditioner + 1/2 spacer plateLine Model TubeBundle VaneFlange Model Tube Bundle Vane + 1/2 spacer plateSenior, Junior or Simplex orifice Fitting1/2 3/4 Available in either line mounted orflange mounted styles. Theseunits effectively remove swirlthat has been introduced by upstream piping components.

10 Individualtubes and bundle diameterare sized to meet therequirements of API April2000. These units allow the use ofa 29D upstream Meter tube section in any piping configuration with a .67 beta ratio limit. The Daniel FLow Conditioning Plate has been tested andshown to be in full compliance with the requirements ofAPI April 2000. The Profiler both removes swirl andcreates a fully developedflow profile at the orifice . Use ofthis unit allowsshortenedupstreamstraight pipelengths of ratio limit as with thetube bundle. Available inflange mounted model only.