Flow Nozzle

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Transcript of Flow Nozzle

Page 1: Flow Nozzle
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Flow Nozzles and Nozzle Meter Tubes Brochure

OverviewComplete Flow Nozzle SectionsRecommended Straight Lengths for NozzlesFlow Nozzle CalculationsTap Placement for Flanged Flow Nozzles

Weld-In Flow Nozzle

Flanged Flow Nozzle    Overview    Type "P" (Plain)    Type "T" (Tapped)    Holding Ring Flow Nozzle    Integral Nozzles, Sizes below 4"

Throat Tap Flow Nozzles    Overview    Flow Section Design    Flanged Type    Typical Calibration Chart

 

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Product Overview

DANIEL FLOW NOZZLESPRODUCT BULLETIN 137

Flanged, Weld-in and Holding Ring Types●

Made in Accordance with Latest A.S.M.E. Codes●

Available in 304 Stainless Steel and Other Metals●

Fully Assembled Meter Tubes Available●

Daniel Laboratory Flow Calibration Available●

DANIEL INDUSTRIES manufactures a full line of precision flow nozzles for a wide range of applications. AllDaniel flow nozzles are made in accordance with A.S.M.E. Codes, including A.S.M.E. MFC-3M, ANSI B31, andothers. Various type nozzles are available for installation in 4" pipe size and larger. Flanged models (Type "T")can be furnished for line sizes as small as 2". For sizes below 4", in other than flanged models, special-designnozzle flow section assemblies are available (not shown). For most operating conditions, Daniel Industriesrecommends that flow nozzles be purchased in stainless steel to lessen the effects of corrosion on the highlypolished throats. Chrome molybdenum steel flow nozzles are available for use under sustained temperaturesas high as 1050ºF. Other types of material are available on request for special applications.

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Complete Flow Nozzle Sections

COMPLETE FLOW NOZZLE SECTIONS

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?Downstream tap locations shown are for Beta ranges of .45 and larger. For low Beta (below .45) nozzles, tap is located 1.5xnozzle bore from upstream face.

*NOTE: The pipe for holding ring nozzle flow sections MUST be bored internally to allow nozzle installation. Pipe sections forflanged or weld-in type flow nozzles need not be bored if the pipe is measured and found to be round within the tolerances allowed.

For Recommended Lengths A & B, see chart in document entitled "Recommended Straight Lengths for Nozzles."

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Recommended Straight Lengths for NozzlesUpstream Down-

Stream

  Single 90ºBend or Tee(Flow FromOne Branch

Only)

  Two or More90º Bends in

the SamePlane

[Note (1)]

    Two or More90º Bends in

DifferentPlanes

[Note (1)]

  Reducer (2Dto D over aLength of

1.5D to 3D)

Expander(2D to Dover a

Length of1.5D to

3D)

GlobeValveFullyOpen

Full BoreBall orGateValveFullyOpen

AllFittings

Includedin ThisTable

b     C' C   C C'

0.20 12 14 3.5 5 34 4.5 5 5 16 6 12 4

0.25 12 14 3.5 5 34 4.5 5 5 16 6 12 4

0.30 12 16 3.5 5 34 4.5 5 5 16 6 12 5

0.35 12 16 3.5 5 36 4.5 5 5 16 6 12 5

0.40 14 18 3.5 5 36 4.5 5 5 16 10 12 6

0.45 14 18 4 5 38 5 5 5 18 12 12 6

0.50 14 20 4 5 40 5 5 10 18 15 12 6

0.55 16 22 4 5 44 5.5 5.5 10 20 18 14 6

0.60 18 26 4.5 5.5 48 6 5.5 10 22 22 14 7

0.65 22 32 5 6 54 6.5 6 12 26 25 16 7

0.70 28 36 5.5 6.5 62 7 6.5 14 30 25 20 7

0.75 36 42 6 7 70 8 7 22 38 25 24 8

For all b values Fittings Minimum UpstreamStraight Length Required

Abrupt symmetrical reductionhaving a diameter ratio of $0.5

15

GENERAL NOTES: Columns C and C' are for straightening vanes.

NOTES:

The insertion of 5D to 10D straight lengths between the two bends is sufficient to make the combinedeffect the same as the single bends in the left column.

1.

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Flow Nozzle Calculations

FLOW NOZZLE CALCULATIONS

The Daniel Industries Calculation Section, a part of the Engineering Department, is responsible for the fast,accurate calculation of flow nozzle bores. The Section utilizes the latest in electronic computers and publishedtrade standards to compute and verify calculations. The calculations are printed on a reproducible data sheetfrom which a copy is made and sent to the customer. To ensure prompt calculations, the customer shouldfurnish complete information relative to either gas, liquid or steam flows.

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Notes on Tap Placement for Flanged FlowNozzlesSome flanged flow nozzles require special considerations with regard to tap locations.

Since taps are located at D and D/2, certain combinations of size and/or pressure make coupling placement"impossible." In most cases, special designs can be made to solve the problem, but these need to be looked atindividually.

To make the situation more easily identifiable, the following chart shows sizes/ratings of flanged nozzles whereother than standard tap location is required.

Contact Engineering for direction on items appearing on list.

STANDARD TAP PLACEMENT NOT POSSIBLE FOR FLANGED NOZZLES IN THESE SIZES/RATINGS

LINESIZE

CLASS150D*

CLASS150U**

CLASS300D

CLASS300U

CLASS600D

CLASS600U

CLASS900D

CLASS900U

CLASS1500

D

CLASS1500

U

CLASS2500

D

CLASS2500

U

2" X X X X X X X X X X X X

3" X   X   X X X X X X X X

4" X   X   X   X   X X X X

6" X   X   X   X   X   X X

8"         X   X   X   X

10"         X   X   X   X

12"                 X   X

*D = Downstream Tap**U = Upstream Tap

NOTES:

"T" Type nozzles will, in most cases, solve downstream tap problems listed above.●

Engineering layouts required for all items listed as upstream tap problems.●

It is recommended that Daniel supply mating flanges for all flanged nozzles listed above.●

Flange thickness for Type "P" nozzles is:

LINE SIZE   FLANGETHICKNESS

2"-3" = .25"

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4" = .38"

5"-8" = .50"

10"-16" = .63"

18" = .88"

Flange thickness for Type "T" nozzles is 1.50" for 1/2" and 3/4" taps.

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Weld-In Flow Nozzle

WELD-IN* FLOW NOZZLE

This type nozzle has a machined tongue around its greatest diameter designed to fit between beveled ends ofboth an inlet and outlet pipe section. The pipe sections, with the nozzle in place, are firmly clamped and/ortack-welded in alignment before the finish weld is applied. The Daniel weld-in flow nozzle is used where flangesare not applicable such as high temperature and pressure applications in power plant installations, feed water,etc. The weld-in nozzle is available with complete flow nozzle flow sections. Pipe wall taps are also used withthis type nozzle.

*Sizes below 4" may require a special-design nozzle flow section assembly. See document entitled "IntegralFlow Nozzles (Sizes Below 4")" for details.

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Integral Nozzles (Sizes Below 4")

In sizes below 4", nozzles can normally be offered as an assembly, including upstream and downstream pipe. Theseintegral units are of all welded construction and can be supplied with socket weld or threaded pressure tap connections (1set is standard). Pipe ends can be beveled or flanged.

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Flanged Flow Nozzle

FLANGED* FLOW NOZZLE

This type of flow nozzle has a flange on its upstream face which is installed between pipe flanges to hold thenozzle concentric with the inside of the pipe. The nozzle flange can be furnished in any type of facing (raised,ring-joint, etc.) as specified.

*See document entitled "Notes on Tap Placement for Flanged Flow Nozzles" for statements on tap locations.

Type "P" (Plain) Flanged Flow Nozzle●

Type "T" (Tapped) Flanged Flow Nozzle●

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Type "P" (Plain) Flanged Flow NozzleTYPE "P" (PLAIN) FLANGED FLOW NOZZLE

Daniel Type "P" flange flow nozzles are the type most commonly used for insertion between pipe flanges. Thistype of flow nozzle is designed for pipe wall taps whose locations are determined by Beta ratio and pipe I.D. Ashoulder behind the nozzle flange centers the nozzle in the pipeline within required tolerances. The DanielType "P" flow nozzle is designed in accordance with A.S.M.E. specifications. (Not available in line size 6" orsmaller.)

 

Type "T" (Tapped) Flanged Flow NozzleTYPE "T" (TAPPED) FLANGED FLOW NOZZLE

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Daniel Type "T" flow nozzles are equipped with the downstream tap in the nozzle flange. This type flow nozzleis basically the same as Type "P" except for the downstream tap location. It is used mostly in small sizes wheretap interference may occur such as on or too close to the pipe weld, in the pipe weld, etc. The Type "T" isfurnished with a 1/2" NPT connection unless otherwise specified.

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Holding Ring Flow Nozzle

HOLDING RING* FLOW NOZZLE

This nozzle configuration is another welding type designed for installation in a pipe without flanges. The nozzleis installed with the curved nozzle inlet facing upstream in a section of carefully selected and internally boredpipe. The Daniel Holding Ring flow nozzle eliminates the welding of dissimilar materials because the ring, pinsand pipe are of compatible materials. Pipe wall taps are also used with this type nozzle.

*The holding ring flow nozzle requires careful consideration for use in sizes below 4" because difficulty may beencountered in welding the thin ring inside a small diameter pipe. For this reason, holding ring type nozzles arenot recommended below the 4" size. Special-design nozzle flow section assemblies are available for thesesizes.

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Throat-Tap Flow Nozzles

DANIEL THROAT-TAP FLOW NOZZLES

For the power industry, Daniel Industries manufactures the highly accurate throat-tap flow nozzle. This type isused as the acceptance test flow nozzle for generating plants. The nozzle is furnished in the flangedconfiguration. Because of the high degree of accuracy necessary, design and manufacturing requirements arequite stringent and the relative cost of the throat-tap flow nozzle is higher than standard nozzles. Daniel offersthe flow calibration service at its Houston plant.

Flange Type Throat-Tap Nozzle●

Flow Section Design for Throat-Tap Nozzles●

Typical Nozzle Calibration Chart●

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Flange Type Throat-Tap NozzleFLANGE TYPE THROAT-TAP NOZZLE

The Daniel flange type throat-tap flow nozzle is used when extreme accuracy and repeatability are required. Inmost cases, this type of nozzle is purchased with a complete flow section and laboratory flow calibrated beforedelivery. Daniel flange type throat-tap nozzles are manufactured in strict accordance with the A.S.M.E. powertest code and furnished with two throat-taps as standard.

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Flow Section Design for Throat-Tap Nozzles

Note: No obstruction such as thermocouple wells, backing rings, etc.FLOW SECTION DESIGN FOR THROAT-TAP NOZZLES (A.S.M.E. POWER TEST CODE PTC-6-1964)

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Typical Nozzle Calibration Curve