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9/30/94: F1-1FIELD PROCEDURE 1Sample and Velocit-; Traverses

Note: The data sheet FDS) serves as a summary sheet; hence, there is n o Summary Shee t .A.1.

2.

B.1.

2.

TravensPdnt

Measurement Site 3. Stacks with D, >24 InchesSelect a site located 2 2 equivalentdiameters (D,'s) downstream and 20. 5 Dupstream from any flow disturbance such asa bend, expansion, or contraction in thestack, or from a visible flame.

a. If any traverse points fall within 1OO in.of the stack wall, relocate them awayfrom the wall by either 1OO in. or adistance equal to the nozzle ID,whichever is larger. These relocated

If criteria above cannot be met, consider thealternative procedure for determining theacceptability of a measurement location inFP la.Number of Traverse PointsRefer to Figure F1-1 (see FDSl-2. r ight s idefor particulate traverses and leftside forvelocity, non-particulate traverses) andselect the number of traverse points thatcorresponds to the number of D,'s upstreamand downstream.Select the higher of the two numbers oftraverse points, or a greater value, such thatthe number is:a. For circular stacks, a multiple of 4.

traverse points (on each end of adiameter) are the "adjusted" traversepoints.

points are combined to form a singleadjusted traverse point, treat theadjusted point as two separate traversepoints, both in the sampling (or velocitymeasurement) procedure, and inrecording the data.

Stacks with D,s 5 2 4 nchesFollow the procedure in step C3, except use0.50 in. instead of 1OO in.

b. Whenever two successive traverse

4.

0. Cross-sectional a y o u t and LocationofTraverse Pointsfo r Rectangular Stacks1. Determine the grid configuration from

Table F1-1, and locate the traverse point atthe centroid of each elemental area (seeb. Rectangular stacks, one of those shownin Table F1-1.Cross-sectionalLayout and LocationofTraverse Pointsfor Circular StacksLocate the traverse points on twoperpendicular diameters according toTable F1-2 and Figure F1-2.For particulate traverses, locate one diameterin a plane containing the greatest expectedconcentration variation, e.g., after bends, inthe plane of the bend.

example in Figure F1-3).If more than the minimumnumber oftraverse points is used, expand the"minimum number of traverse points" matrix(see Table F1-1) by adding the extra traversepoints along one or the other or both legs ofthe matrix; the final matrix need not bebalanced. For example, if a 4 x 3 "minimumnumber of points" matrix were expanded to36 points, the final matrix could be 9 x 4 or12 x 3, and would not necessarily have tobe6x6.

2.

Distmm

4.414.720.570.585 385.6

O b - r

FigureF1-2.Clrcular slack cross-section ayout. FigureF1-3.Rectangular slack cross-section ayout.

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9130194: FD1-1

~

Downstream(20.5D,?)

FIELD DATA SHEET 1Sampling and Velocity Traverse PointsClientIPlant Name J ob #CityIState DaterrimeTest Location PersonnelPort I.D. I IDistance from Far Wall to Outside of PortNipple Length and/or Wall ThicknessStackIDuct ( J ) Blue Print l 1 Measured ( 1

DeDthIDiameter />12 n. 71 I IWidth (if rectanaular) I .I

Equiv. Diameter (if rect.1D = 2 D W/(D +WlA = I T D14 or D W

I Distance I D I No. P ts* IUpstream ( 2 2 D,?J I I

* Circle iarger o f two.

Depthz II I

14 I I II II II I 11- -

19I

Do not place closer to stack walls than:1 Oin. for stack dia. >24 in.0.5 in. for stack dia. 12to 5 2 4 in.

Sketchoffocation: In the space above, sketch a flow diagram of the test location; show the distance from the ports toflow disturbances before and after. Sketch the cross-sectional area; show sampling port locations. In horizontal ducts,check for dust buildups and measure or estimate the depth.Completeness- egibility Accuracy- Specifications- Reasonableness-A/QC CheckChecked by: Personnel (S ignaturelDate) Team Leader (Signature/Datel

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9130194: FD1-2

6

4.414.629.670.485.495.6

CONSIDERATIONS1. Ifest location is after a cyclone or inertial demister following venturi scrubbers or if the stack has tangential

inlets or other configurations that tend to induce swirling, verify that cycionic flow does not exist. See FP 7a(Check here __ H verification rS made a.,Jattach FDS la. I f cyclonic flow exists, modify source by usingstraightening vanes or use another location.

2. If D

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9130194: F1a-1FIELD PROCEDURE l aFlow Verification or Alternative Measurement Site

Note: Use section A after such devices as cyclones and inertial demisters following venturi scrubbers, orin stacks having tangential inlets or other duct configurations that tend to induce swirling to check for thepresence or absence of cyclonic flow.A.1.

2.

Flow VerificationSet up the apparatus (see FP 2). Level andzero the manometer. P osition the Type Spitot tube a t each traverse point, insuccession. The "0" eference" is when theplanes of the face openings of the p itot tubeare perpendicular to the s tack cross-sectional plane.R otate the pito t tube (upto rt90" ya wangle) until a null reading is obtained.Carefully determine and record the value ofthe rotation angle ( a) o the nearest degree(see FDS la) .

B. Alternative Measurement Si tedowns tream or 24 in.

This alternative applies to sources c 2 D,

1.2.

3.4.

5.

6.

Use 40 traverse points for circular ductsand 42 points for rectangular ducts.P repare the directional probe and differentialpressure gauges as recommended by themanufacturer.Optional: Leak-check the system (seeFP 2a).Level and zero the manometers.P eriodically check the level and zero duringthe traverse.Obtain the readings sho wn in FDS 1b ateach traverse point, and determine the ya wand pitch angles.Mandatory: Leak-check the s ystem (seeFP 2a). Failing the leak-check invalidatesthe test run.

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9130194: F D l a - 1

TestPoint

No. of Pts:

Yaw Angle(deg)

Sum:

Avg:

FIELD DATA SHEET l aFlow Verification

Test LocationJ ob # DaterrimePitot ID # Personnel

Note: To combine this information with the preliminary traverse for Method 5sampling, use the data sheet under Method 5.CONSIDERATIONS

Are the face openings of the Type S pitot tube parallel to each other andperpendicular to the axis passing through both?When the face of the pitot tube is parallel to the axis of the stack or duct,does the yaw angle indicator read zero?Average yaw angle s 2 O o ? If not, donotuse this location. Alternatively,modify the source by using straightening vanes or use another location thatsatisfies Method 1criteria.

No. of Pts = includes points with O o yaw.Sum =sumof absolute valuesAvg =Sum/(No. of Pts)

W Q C CheckCompleteness- Legibility- Accuracy- Specifications Reasonableness-Checked by: Personnel (Signature/Date) Team Leader (Signature/Date)

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9130194: FD1b- 1FIELD DATA SHEET 1bAlternative Measurement Site

Test Location J ob #DatemimeDuct Size >24 in . (7) 3-DPitot Personnel

42 (Rectangular)- 0 (Circular,o. of Test Pts (4:--ote: This alternative procedure is limited to ducts >24 inches in diameter where blockage and.wall effects areminimal; the procedure generally applies to sites c2 D, downstream and C0.5 D, upstream from flow disturbances.

n Avg (abs)Post-test Leak Check (Stable for >75 seconds at 3 n . H,O?)

Ri s2Oo and SD ~ 1 0 ~ 7f so, use at 2 2 4 or 25 traverse points for particulate sampling and 2 1 6 for velocitymeasurements.

QA/QC CheckCompleteness - Legibility- Accuracy- Specifications- easonableness-Checked by: Personnel (SignaturdDateI Team Leader (Signature/Date)

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9130194: F1A -1FIELD PROCEDURE 1 ASample and Velccity Traverses in Small Stacks or Ducts

Note:stacksorducts,i.e., 4in. r j D

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9/ 30/ 94: D1A -1FIELD DATA SHEET 1A

Sampling and Velocity Traverse Point Determination(Small Stacks or Ducts)

Test Location J ob#Daterrime Personnel

ApplicabilityMethod1A applies only when 4 in. I D 4 2 n. (circular) and 12.57 in.* i A el13 in.2 (rectangular). A standard type pitot tubemust be used for the velocity measurements and mustNOTbe attached to the sampling probe.Use FDS 7 and attach this sheet to it. The following are pertinent to FP 1A:Distance from Ports to Flow Disturbances (see figure below)

Std Pitot Tip Plane Sampling PortDistance De No. Pts Distance De No. PtsUpstream B CDownstream A B

Use the upstream/downstream distances as in FP 1 to determine the minimum number of traverse points; use the highest ofthe four numbers of traverse points.If the source ope rates under steady flow conditions and on e test location i s used for both velocity an d particulate m attermeasurem ents, the average velocity after the particulate sa mpling run must agree w ithin +lo% f that before the test run.Attach appropriate FDSs.

Figure F1A-1 .

NOTE: This is dimenah o/ pilot0. ot to port.Flow disrulbance

NOTE: Velocity port must be dowmtmam from sampling port.Al l thmdistances (A , B. and C) must be shown onsampling W o n chematic.

QNQC CheckCompleteness Legibility Accuracy Specifications ReasonablenessChecked by: Personnel (Signature/Date) Team Leader (SignaturelDate)