aga 3 -2000 revision
DESCRIPTION
Emerson document on the changes to AGA3TRANSCRIPT
EFFECTS OFAPRIL 2000
REVISION OFAPI 14.3 PART 2
ORIFICE METERTUBES
CHANGES TO API 14.3 - APRIL 2000CHANGES TO API 14.3 - APRIL 2000
INTERNAL SURFACE FINISH
UPSTREAM LENGTH
STRAIGHTENING VANES
FLOW CONDITIONERS
8” PLATE THICKNESS
THERMOWELL LOCATION
STAGGERED TAPS
P LEAD LINES
INCREASED DIFFERENTIAL
GRANDFATHER CLAUSE
INTERNAL FINISHINTERNAL FINISH
WAS 250 MICROINCH THROUGHOUT
CHANGES TO API 14.3 - APRIL 2000
•NOW SIZE AND BETA DEPENDENT
METER TUBES TO 12” SIZE
CHANGES TO API 14.3 - APRIL 2000
INTERNAL SURFACE FINISH
METER TUBES 16” & LARGER
INTERNAL SURFACE FINISH
CHANGES TO API 14.3 - APRIL 2000
THOUGH UNDESIRABLE, ARE NOW ALLOWED,IF THEY DON’T
→EXCEED I.D. TOLERANCE
→EXCEED FINISH REQUIREMENT
PITS
CHANGES TO API 14.3 - APRIL 2000
UPSTREAM LENGTH SELECTIONUPSTREAM LENGTH SELECTION
→BARE TUBE ( no vane or conditioner)
→SHORT TUBE WITH VANE
→LONG TUBE WITH VANE
→TUBE WITH CONDITIONER
4 CATEGORIES
CATEGORY ( no vane or conditioner )
NOW IS 145D
UNIVERSAL “CATCH ALL” METER TUBE
CATEGORY Bare Meter Tubes continued,
Shorter Lengths Possible For Specific Installations
CATEGORY Bare Meter Tubes continued,
Shorter Lengths Possible For Specific Installations
→Single 90º Elbow @ .75β ---44D
→(2) 90’s Out of Plane (close coupled) @ .5β --95D
→Concentric Reducer @ .75β --13D
→Tee (used as an elbow-not header) @ .75β --44D
See
detail
CATEGORY
NO VANE OR
CONDITIONER
MAX .46 BETA
CATEGORY SHORT VERSION WITH VANE
UNIVERSAL METER TUBE WITH VANE
SHORT UPSTREAMLENGTH WITH TUBE
BUNDLE
COMPARISON OFOLD AND NEW
REQUIREMENTS
CATEGORY
CATEGORY
Short upstream
with tube bundle
CAREGORY LONG VERSION WITH VANE
MAX .67 BETA
UNIVERSAL METER TUBE WITH VANE
CATEGORY
LONG UPSTREAM
WITH TUBE BUNDLE
LONG UPSTREAMLENGTH WITH TUBE
BUNDLE
COMPARISON OF OLDAND NEW
REQUIREMENTS
CATEGORY
THE METER TUBE LENGTH INFORMATION
CONTAINED IN THIS REVISION WAS BASED ON
THE RESULTS OF ACTUAL FLOW TESTING AT
12 LABS (DOMESTIC AND INTERNATIONAL),
USING BOTH LIQUID AND GAS.
CHANGES TO API 14.3 - APRIL 2000
CHANGES TO API 14.3 - APRIL 2000
TUBE BUNDLE STRAIGHTENING VANES
19 CONCENTRIC SAME SIZE TUBES
NEW, TIGHTER TOLERANCES
TUBE BUNDLE STRAIGHTENING VANES
CHANGES TO API 14.3 - APRIL 2000
CONCENTRIC PATTERN
HEX PATTERN
NOT ALLOWED
TUBE BUNDLE STRAIGHTENING VANES
HEX PATTERN
CHANGES TO API 14.3 - APRIL 2000
END BANDS
NOT ALLOWED
TUBE BUNDLE STRAIGHTENING VANES
CHANGES TO API 14.3 - APRIL 2000
END BANDS
7 TUBE BUNDLE
NOT ALLOWED
TUBE BUNDLE STRAIGHTENING VANES
CHANGES TO API 14.3 - APRIL 2000
7 TUBE BUNDLE FOR 2” SIZE
FLOW CONDITIONINGFLOW CONDITIONING
FLOW CONDITIONERS
REMOVE SWIRL AND CREATE A NEAR
FULLY DEVELOPED FLOW PROFILE
CHANGES TO API 14.3 - APRIL 2000
THE DANIEL PROFILERTM
CONDITIONER PLATE
Profiler™ Installation
METER TUBE WITH PROFILER
CHANGES TO API 14.3 - APRIL 2000
Meter tube upstream lengthsand beta ratio limits for usewith all flow conditionersother than the standard tubebundle will be established bythe manufacturer based onrequired testing
(ref. Par. 2.5.5.4 AGA-3/API 14.3 April2000)
CHANGES TO API 14.3 - APRIL 2000
THE USE OF FLOWCONDITIONERS MAY ALLOWSHORTER UPSTREAM PIPELENGTHS
BUTA SERIES OF TESTS MUST BE RUNBEFORE OFFERING THE DEVICETO THE MARKET
CHANGES TO API 14.3 - APRIL 2000
Disturbance TestsDisturbance Tests
→Good Flow Conditions
→Two 900 Elbows in Perpendicular Planes
→Gate Valve 50% Closed
→High Swirl
CHANGES TO API 14.3 - APRIL 2000
Flow Conditioner Qualification Test
CHANGES TO API 14.3 - APRIL 2000
Flow Conditioner Qualification Test
•Good Flow Conditions - test evaluating impact of flowconditioner on fully developed velocity profile.
•Install the conditioner in the specified location preceding ameter tube where the installation has been shown to alreadyhave a swirl free, fully developed profile. This proves thedevice has no negative effect on flow.
•Two 900 Elbows in Perpendicular Planes - testing of flowconditioner performance in handling combination of a modestswirl and a non-symmetrical velocity profile.
CHANGES TO API 14.3 - APRIL 2000
Flow Conditioner Qualification Test
Gate Valve 50% Closed - test evaluating flow conditionerperformance in strongly non-symmetrical velocity profile
CHANGES TO API 14.3 - APRIL 2000
Flow Conditioner Qualification Test
•High Swirl - test assessing flow conditioner performancein flows with high swirl angle (over 250).
CHANGES TO API 14.3 - APRIL 2000
Flow Conditioner Qualification Test
Swirl must be reduced to 2º Max
Additional TestsAdditional Tests
– Orifice β ratio: Check swirl test at β=0.40 andβ=0.67
– Reynolds Number Sensitivity: Test at tworanges 10,000 < Re <500,000 and Re > 1MMwith approximately a 7:1 ratio.
– Scaling: Test at two sizes selected from D < 4” and D > 8”
Flow Conditioner Qualification Test
CHANGES TO API 14.3 - APRIL 2000
ANY FLOW CONDITIONERCHOSEN SHOULD HAVE TESTDATA SHOWING COMPLIANCEWITH THE TESTING PROGRAMOUTLINED IN AGA/14.3
CHANGES TO API 14.3 - APRIL 2000
CHANGES TO API 14.3 - APRIL 2000CHANGES TO API 14.3 - APRIL 2000
WAS 12” TO 36” UPSTREAM OF VANE
NOW IS 36” MINIMUM UPSTREAM OF VANE
UPSTREAM THERMOWELL LOCATION
STAGGERED PRESSURE TAPSSTAGGERED PRESSURE TAPS
NOT ALLOWED
CHANGES TO API 14.3 - APRIL 2000
STAGGERED PRESSURE TAPS
PLATE THICKNESS CHANGE
→8” SIZE WAS 1/8” THICK
→NOW IS 1/4” THICK
CHANGES TO API 14.3 - APRIL 2000
Reason: differential was limited to 150” in an orifice fitting
→Some 1/8” and 1/4”seal/plate assemblies may beinterchangeable in the samefitting, allowing installation ofthe wrong plate in the rightfitting
CHANGES TO API 14.3 - APRIL 2000
IMPACT OF 8” PLATE CHANGE TO 1/4” THICK
→Plate carriers and/or seal rings forsome manufacturers’ fittings maybe different for 1/8” and 1/4” thickplates
CHANGES TO API 14.3 - APRIL 2000
IMPACT OF 8” PLATE CHANGE TO 1/4” THICK
→Existing installations using1/8” thick plates will requirecareful organization if 1/4”units are added
IMPACT OF 8” PLATE CHANGE TO 1/4” THICK
CHANGES TO API 14.3 - APRIL 2000
PLATE THICKNESS CHANGE
→24” SIZE WAS 3/8” THICK
→NOW IS 1/2” THICK
CHANGES TO API 14.3 - APRIL 2000
Reason: differential was limited to 150”
DP TAP CONNECTION LINE LENGTHS
CHANGES TO API 14.3 - APRIL 2000
→EQUAL LENGTH LINES
→SHORT AS POSSIBLE
DP TAP CONNECTION LINE LENGTHS
CHANGES TO API 14.3 - APRIL 2000
DIFFERENTIAL TAP LINE LENGTHDIFFERENTIAL TAP LINE LENGTH
IF RESONANCE OR PULSATION IS SUSPECTED,– CALCULATE PROPER LENGTH USING THESE 5 EQUATIONS BASED ON
PULSATION FREQUENCY (f) AND SPEED OF SOUND IN FLUID (a)
length L = factor x a / (2 B f )
0.25
2.5
5.5
8.5
11.5
THE RESULTING LENGTH NEAREST THAT PREFERRED SHOULD BE USED
CHANGES TO API 14.3 - APRIL 2000
DP TAP CONNECTION LINE LENGTHS
INCREASED DIFFERENTIAL PRESSUREINCREASED DIFFERENTIAL PRESSURE
TABLES SHOWING MAXIMUM DP FORRECOMMENDED PLATE THICKNESSES
– 304SS AND 316SS
– TEMPERATURES TO 150ºF (65ºC)
– INSTALLED IN BOTH FITTINGS AND FLANGES• FLANGES ALLOW MUCH HIGHER DIFFERENTIALS
CHANGES TO API 14.3 - APRIL 2000
INCREASED DIFFERENTIAL PRESSURES
INCREASED DIFFERENTIAL PRESSURECONTINUEDINCREASED DIFFERENTIAL PRESSURECONTINUED
SOME SIZES ALLOW UP TO 1000” DP
– VALUES BASED ON PLATE DEFLECTION ONLY
– ANY OPERATIONAL EFFECTS ON ORIFICE FITTINGS NOTCONSIDERED
ADDITIONAL TABLES FOR OTHER THAN STANDARD PLATETHICKNESSES IN APPENDIX
CHANGES TO API 14.3 - APRIL 2000
INCREASED DIFFERENTIAL PRESSURES
CHANGES TO API 14.3 - APRIL 2000CHANGES TO API 14.3 - APRIL 2000
POSSIBLEEFFECT OFDIFFERENTIALPRESSURESEXCEEDINGVALUESSHOWN
INCREASED DIFFERENTIAL PRESSURES
GRANDFATHER CLAUSE
From API 14.3 Part 2, Par 2.1, April 2000
CHANGES TO API 14.3 - APRIL 2000
It is strongly recommended that a copyof the new standard be obtained andread thoroughly as there are manydetails not covered in this presentation
It is strongly recommended that a copyof the new standard be obtained andread thoroughly as there are manydetails not covered in this presentation
CHANGES TO API 14.3 - APRIL 2000
THE ENDTHE END
CHANGES TO API 14.3 - APRIL 2000
TAP HOLE LOCATION TOLERANCE FROM 14.3
HOW TO MEET 14.3 WITH A 1/4” THICK PLATE IN A FITTINGDRILLED FOR A 1/8” THICK PLATE
4” & LARGER
LIMIT BETA
TO .6
If distance “S” between 2 fittings is 22D or more,only the fitting nearest the orifice is considered
2.6.3.1
CHANGES TO API 14.3 - APRIL 2000