l-545 servicemans manual

8/20/2019 L-545 Servicemans Manual

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LP-GasServiceman’s

Manual


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1

The LP-Gas

Serviceman’s Manual

RegO®, has prepared this LP-Gas Serviceman’s

Manual for use by installation servicemen and others

requiring a handy reference for field service work.

It deals with subjects that can be useful to field

servicemen striving for greater efficiency and safer

installations. For the more technical problems and

theories, the many texts and manuals concerning the

particular subject should be consulted.

This manual is not intended to conflict with federal,

state, or local ordinances and regulations. These

should be observed at all times.

This information is intended to be forwardedthroughout the product distribution chain. Additionalcopies are available from RegO® Products MasterDistributors.


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Contents

Information About LP-Gas*.............................. 3

Vapor Pressures of LP-Gases* ....................... 4

Installation Planning ........................................ 5

Propane Storage Vessels ................................ 5

Determining Total Load ................................... 6

100 LB. Cylinders ............................................ 7

ASME Storage Containers .............................. 8

Proper Purging of LP-Gas Containers ............9

Proper Placement of Cylinders and Tanks .... 13

Pipe And Tubing Selection ............................ 16

LP-Gas Regulators ........................................ 27

Leak Testing the Installation .......................... 36

Proper Use of Excess Flow Valves ............... 40

Pressure Relief Valves .................................. 41

Repair of the MultiBonnet® ........................... 43

Flow of LP-Gas Through Fixed Orifices ........ 45

Line Sizing Chart for Liquid Propane ............46

Representative Equivalent Lengths of Pipe

for Various Valves and Fittings ...................... 47

Determining Age of RegO® Products ............ 48

Conversion Units ........................................... 50


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Information About LP-Gas*

Formula C3

H8

C4

H10

Boiling Point, ºF -44 15

Specific Gravity of Gas

(Air=1.00) 1.50 2.01

Specific Gravity of Liquid

(Water=1.00) 0.504 0.582

Lbs. per Gallon of Liquid at 60º F 4.20 4.81

BTU per Gallon of Liquid at 60º F 91502 102032

BTU per Lb. of Gas or Liquid 21548 21221

BTU per Cu. Ft. of Gas at 60º F 2488 3280

Cu. Ft. Vapor (at 60°F and 14.7 PSIA)/Gal. Liq 36.38 31.26

Cu. Ft. Vapor (at 60°F and 14.7 PSIA)/Lb. Liq 8.66 6.51

Cu. Ft. Vapor (at 60°F and 14.7 PSIA ) /Cu. Ft. of Liq 272 234

Latent Heat of Vaporizationat Boiling Point BTU/Gal. 773 808

Combustion Data:

Cu. Ft. Air Required to Burn

1 Cu. Ft. Gas 23.86 31.02

Flash Point, ºF -156 N.A.

Ignition Temperature in Air, ºF 920-1120 900-1000

Maximum FlameTemperature in Air, ºF 3595 3615

Limits of Flammability

Percentage of Gas in Air Mixture;

At Lower Limit – % 2.15 1.55

At Upper Limit – % 9.6 8.6

Octane Number

(ISO-Octane=100) Over 100 92

*Commercial quality. Figures shown in this chart representaverage values.

Propane Butane


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Vapor Pressures of LP-Gases*

-40 -40 3.6

-30 -34 8

-20 -29 13.5

-10 -23 23.3

0 -18 28

10 -12 37

20 -7 47

30 -1 58

40 4 72 3.0 50 10 86 6.9

60 16 102 12

70 21 127 17

80 27 140 23

90 32 165 29

100 38 196 36

110 43 220 45

*Conversion Formula:

Degrees C = (ºF - 32) X5

/9

Degrees F = 9/5 X ºC + 32

Temperature Approximate Pressure (PSIG)

(ºF) (ºC) Propane Butane


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Propane Storage VesselsThe withdrawal of propane vapor from a vessel lowers thecontained pressure. This causes the liquid to “boil” in aneffort to restore the pressure by generating vapor to replacethat which was withdrawn. The required “latent heat ofvaporization” is surrendered by the liquid and causes thetemperature of the liquid to drop as a result of the heat so

expended.The heat lost due to the vaporization of the liquid is replaced by the heat in the air surrounding the container. This heatis transferred from the air through the metal surface ofthe vessel into the liquid. The area of the vessel in contactwith vapor is not considered because the heat absorbed by the vapor is negligible. The surface area of the vessel

that is bathed in liquid is known as the “wetted surface.”The greater this wetted surface, or in other words thegreater the amount of liquid in the vessel, the greater thevaporization capacity of the system. A larger containerwould have a larger wetted surface area and therefore wouldhave greater vaporizing capacity. If the liquid in the vesselreceives heat for vaporization from the outside air, the higher

the outside air temperature, the higher the vaporization rateof the system. How all this affects the vaporization rate of100-pound cylinders is shown on page 7. It will be notedfrom this chart that the worst conditions for vaporization rateare when the container has a small amount of liquid in it andthe outside air temperature is low.

With the principles stated above in mind, simple formulae

for determining the proper number of DOT cylinders and proper size of ASME storage containers for various loadswhere temperatures may reach 0ºF will be found on pages 7and 8 respectively.

Installation Planning


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Determining Total Load

In order to properly size the storage container, regulator, and

piping, the total BTU load must be determined. The total loadis the sum of all gas usage in the installation. It is arrived at by

adding up the BTU input of all appliances in the installation.

The BTU input may be obtained from the nameplate on the

appliance or from the manufacturers’ literature.

Future appliances which may be installed should also be

considered when planning the initial installation to eliminate

the need for a later revision of piping and storage facilities.

Where it may be more desirable to have ratings expressed

in CFH, divide the total BTU load by 2488 for CFH of

propane.

Approximate BTU Input For Some Common

Appliances

Range, free standing, domestic 65,000

Built-in oven or broiler unit, domestic 25,000

Built-in top unit, domestic 40,000

Water Heater, (Quick Recovery)

automatic storage–

30 Gallon Tank 30,000



Water Heater, automatic instantaneous

(2 gal. per minute) 142,800

Capacity (4 gal. per minute) 285,000

(6 gal. per minute) 428,400

Refrigerator 3,000Clothes Dryer, Domestic 35,000

Gas Light 2,500

Gas Logs 30,000

Approx. Input

Appliance (BTU per Hour)


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100 LB. Cylinders

How Many Are Required

“Rule of Thumb” Guide for Installing 100 Lb. Cylinders

For continuous draws where temperatures may reach

0ºF. Assume the vaporization rate of a 100 lb. cylinder

as approximately 50,000 BTU per hour.

Number of cylinders per side =Total load in BTU

50,000

Example:

Assume total load = 200,000 BTU/hr.

Cylinders per side = 200,000 = 4 cylinders per side

50,000

Vaporization Rate - 100 Lb. Propane Cylinders(Approximate)

This chart shows the vaporization rate of containers in terms of the temperatureof the liquid and the wet surface area of the container. When the temperature islower of if the container has less liquid in it, the vaporization rate of the containeris a lower value.

100 113,000 167,000 214,000 277,000 300,000

90 104,000 152,000 200,000 247,000 277,000

80 94,000 137,000 180,000 214,000 236,000

70 83,000 122,000 160,000 199,000 214,000

60 75,000 109,000 140,000 176,000 192,000

50 64,000 94,000 125,000 154,000 167,000

40 55,000 79,000 105,000 131,000 141,000

30 45,000 66,000 85,000 107,000 118,000

20 36,000 51,000 68,000 83,000 92,000

10 28,000 38,000 49,000 60,000 66,000

Lbs. of Maximum Continuous Draw In BTU Per Hour At Propane Various Temperatures In Degrees F. In Cyl. 0ºF 20ºF 40ºF 60ºF 70ºF


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ASME Storage Containers

Determining Propane Vaporization Capacity

“Rule of Thumb” Guide for ASME LP-Gas Storage Containers

Where

D = Outside diameter in inches

L = Overall length in inches

K = Constant for percent volume

of liquid in container

60 100 D X L X 100

50 90 D X L X 90

40 80 D X L X 80

30 70 D X L X 70 20 60 D X L X 60

10 45 D X L X 45

*These formulae assume an air temperature of 0° F. for vaporizing atother temperatures, see the chart below. The vapor space area ofthe vessel is not considered. Its effect is negligible.

Vaporizing Capacities For Other AirTemperatures (Temperature Factor)Multiply the results obtained with the above formulae by oneof the following factors for the prevailing air temperature.

-15ºF 0.25 +5ºF 1.25

-10ºF 0.50 +10ºF 1.50

-5ºF 0.75 +15ºF 1.75

0ºF 1.00 +20ºF 2.00

Percentage of K *Propane Vaporization Capacity Container Filled Equals at 0ºF (in BTU/hr.)

Prevailing Air Prevailing Air

Temperature Multiplier Temperature Multiplier


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Proper Purging of LP-Gas Containers

The Importance of Purging

A very important step which must not be overlooked by LP-Gasdistributors is the importance of properly purging new LP-Gascontainers. Attention to this important procedure will promotecustomer satisfaction and greatly reduce service calls on newinstallations. Consider the following: • Both ASME and DOT specifications require hydrostatic

testing of vessels after fabrication. This is usually done withwater.

• Before charging with propane, the vessel will contain thenormal amount of air.

Both water and air are contaminantsThey seriously interfere with proper operation of the system andthe connected appliances. If not removed, they will result in costlyservice calls and needless expense far exceeding the nominal costof proper purging.

Neutralizing Moisture

Even if a careful inspection (using a flashlight) reveals no visiblemoisture, the container must still be neutralized, since dew mayhave formed on the walls; additionally, the contained air may haverelative humidity up to 100%.A rule of thumb for neutralizing moisture in an ASME containercalls for the introduction of at least one pint of genuine absoluteanhydrous methanol* (99.85% pure) for each 100 gal. of water

capacity of the container. On this basis, the minimum volumes fortypical containers would be as shown below:

100 lb. ICC cylinder 1/8 pt. (2 fl. ozs.)

420 lb. ICC cylinder 1/2 pt. (8 fl. ozs.)

500 gal. tank 5 pts. (21/2 qts.) 1000 gal. tank 10 pts. (11/4 gal.)

* IMPORTANT-Avoid substitutes - they will not work. The secret of theeffectiveness of methanol over all other alcohols is its high affinity for water

plus a boiling point lower than all other alcohols, and most important: a boiling point lower than water.

Container Type

Minimum Volume Methanol Required


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Proper Purging of LP-Gas ContainersThe Importance of Purging Air If the natural volume of atmosphere in the vessel is not

removed before the first fill, these problems will result:

• Installations made in spring and summer will experience

excessive and false container pressures. This will cause

the safety relief valve to open, blowing off the excess

pressure.

• The air mixture present in the vapor space will be carried

to the appliances. This may result in as many as 5 or moreservice calls from pilot light extinguishment.

• If a vapor return equalizing hose is not used, the contained

air will be compressed above the liquid level, resulting in

slow filling.

• If a vapor equalizing hose is used, the air, and any moisture

it contains, will be transferred from the storage tank to the

transport.Additionally, if atmospheric air is properly purged from the

storage tank;

• the storage tank will fill faster,

• appliances will perform more consistently

• relief valves will be less likely to pop off at consumer

installations.Never Purge with Liquid

The wrong way is of course the easiest way. Never purge a

container with liquid propane. To do so causes the liquid

to flash into vapor, chilling the container, and condensing

any moisture vapor on the walls where it remains while the

pressure is being blown down. Additionally, less than 50%

or as little as 25% of the air will be removed by this easy but

wrong method.

The correct procedure for purging air is shown on the

following page.


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Proper Purging of LP-Gas ContainersPurging of Air

1. Install an unloading adapter on the double check fillervalve, leaving it in the closed position.

2. Install a gauge adapter assembly on the service valve POLoutlet connection. Exhaust to atmosphere any air pressure in

the container.*(See page 12)3. Attach a truck vapor equalizing hose to the vapor return

valve on the container.

4. Open the valve on the outlet end of the vapor equalizinghose, throttling it to avoid slugging the excess flow valve onthe truck. Carefully observe the pressure gauge.

5. When the gauge reading shows 15 psig, shut off the vapor

valve on the hose.6. Switch the lever on the unloading adapter to open the double

check filler valve and blow down to exhaustion.

7. Close unloading adapter lever, allowing the double checkfiller valve to close.

8. Repeat steps (4), (5), (6), and (7) FOUR MORE TIMES.Total required time is 15 minutes or less.

CAUTION: Never purge the container in this manner on the customer’s property. Discharge of the vapor into the atmosphere canseriously contaminate the surrounding area. It should in allcases be done on the bulk plant site.

Gauge Adapter

Assembly

{

MultiValve

House Service Outlet Valve

Vapor Equalizing Hoseconnected to vapor

equalizing valve.Emergency Unloading Adapter (RegO® # 3119A, 3120or 3121) on filler valve

30 Lb. Pressure Gauge (RegO®

No. 2411)

1/4” Elbow

POL Connection (RegO® No. 970


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Proper Purging of LP-Gas Containers

Here’s What HappenedWhile performing the operations shown on the preceding page, the

percent of air in the container was reduced as shown in the table

below:

Experience indicates that a reduction of the residual air content to

6.25% is adequate. The resulting mixture will have a thermal value

of about 2400 BTU. In this case, the serviceman can adjust the

burners for a slightly richer product. Moreover, the slight volume

of air will to some extent dissolve in the propane if the installation

stands unused for a few days.

How much Product was Consumed

If instructions on the preceding page were carefully followed and

the vapor was purged five times, a total of 670 cu. ft. (18.4 gal)

would have been used for a 1000 gallon tank. In a 500 gallon tank,

a total of 9.2 gallons would have been used.

DOT Cylinder Purging

1. Exhaust to atmosphere any air pressure in the container*

2. Pressurize the cylinder to 15 psig propane vapor

3. Exhaust vapor to atmosphere

4. Repeat four more times

* Pre-Purged containers

For LP-Gas containers that are purchased pre-purged it is not

necessary to follow the purging procedure previously shown in

this handbook. Simply attach an adapter onto the POL service

connection and introduce propane vapor into the container. Allowcontainer pressure to reach at least 15 psig before disconnecting

the adapter. Air and moisture have already been removed from

pre-purged containers.

For more information, contact your local container supplier.

1st Purging 50 50 2nd Purging 25 75

3rd Purging 12.5 87.5

4th Purging 6.25 93.75

5

th

Purging 3.13 96.87 6th Purging 1.56 98.44

% Air Remaining % Propane Remaining


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Proper Placement of Cylinders and Tanks

After the proper number of DOT cylinders or proper size

of ASME storage containers has been determined, caremust be taken in selecting the most accessible, but “safety

approved” site for their location.

Consideration should be given to the customer’s desires

as to location of LP-Gas containers, and the ease of

exchanging cylinders of refilling the storage tanks with

the delivery truck––BUT precedence must be givento state and local regulations and NFPA 58, Liquefied

Petroleum Gas Code. Refer to this standard when plan-

ning placement of LP-Gas containers. Copies are

available from the National Fire Protection Association,

Batterymarch Park, Quincy, MA 02269.

The charts on the following pages are reprinted with permission of NFPA 58, LP-Gas Code, Copyright ©,

National Fire Protection Association, Quincy, MA

02269. This reprinted material is not the complete and

official position of the NFPA on the referenced subject

which is represented only by the standard in its entirety.


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L o c a t i o n

o f D O T C y l i n d

e r s

F r o m N F P

A 5 8 , A p p e n d i x I

F e d e r a l , s t a t e , a n d l o c a l o r d i n a n c e s a n d r e g u l a t i o n s

s h o u l d b e o b s e r v e d a t a l l t i m e s .

N o t e s :

1 ) 5 - f t m i n i m u m

f r o m r e l i e f v a l v e i n a n y d i r e c t i o n

a w a y f r o m e x t e r i o r s o u r c e i f i g n i t i o n , o p e n i n g s i n t o d i r e c t - v e n t g a s a

p p l i a n c e s , o r m e c h a n i c a l v e n t i l a t i o n a i r i n t a k e s .

2 ) I f t h e c y l i n d

e r i s f i l l e d o n s i t e f r o m a b u l k t r u c k ,

t h e f i l l i n g c o n n e c t i o n a n d v e n t v a l v e m u s t b e a t l e a s t 1 0 f t f r o m a n

y e x t e r i o r s o u r c e o f i g n i t i o n , o p e n i n g s i n t o

d i r e c t – v e n t g a s a p p l i a n c e s , o r m e c h a n i c a

l v e n t i l a t i o n a i r i n t a k e s .

3 ) C y l i n d e r s i n s t a l l e d a l o n g s i d e b u i l d i n g s t h e r e l i e f v a l v e d i s c h a r g e m u s t b e :

( a ) A t l e a s t 3 f t h o r i z o n t a l l y a w a y f r o m a n y b u i l d i n g o p e n i n g s t h a t i s b e l o w l e v e l o f t h e r e l i e f v a l v e d i s c h a r g e .

( b ) F o r c y l i n d e r s n o t f i l l e d o n s i t e t h e r e l i e f v a l v e

d i s c h a r g e m u s t b e a t l e a s t 5 f t f r o m a n y e x t e r i o r s o u r c e o f i g n i t i o n , o p e n i n g s i n t o d i r e c t – v e n t g a s a p p l i a n c e s , o r

m e c h a n i c a l v e n t i l a t i o n a i r i n t a k e s .

R e p r i n

t e d w

i t h

p e r m

i s s

i o n

f r o m

N F P A 5 8 - 2

0 0 4

, L i q u e

e

d P e

t r o

l e u m

G a s

C o

d e ,

C o p y r i g

h t © 2 0 0 4

, N a

t i o n a

l F i r e

P r o

t e c

t i o n

A s s o c

i a t i o n ,

Q u

i n c y , M

A 0 2 2 6 9

.

T h i s r e p r i n

t e d

m a

t e r i a

l i s n o

t t h e c o m p

l e t e a n d

o f c

i a l p o s

i t i o n o

f t h e

N F P A o n t

h e r e

f e r e n c e

d s u

b j e c

t , w

h i c h i s r e

p r e s e n

t e d o n

l y b y

t h e s

t a n

d a r d

i n i t s e n

t i r e

t y .


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15

L o c a

t i o n o f

A S M

E C o n t a i n e r s

F r o m

N F P A 5 8 , A p p e n d i x I

U n d e r g r o u

n d C o n t a i n e r N o t e s :

1 ) T h e r e l i e f v a l v e , f i l l i n g c o n n e c t i o n a n d l i q u i d f i x e d l i q u i d

l e v e l g a u g

e v e n t c o n n e c t i o n a t t h e c o n t a i n e r m u s t b e a t

l e s t 1 0 f t f r o m

a n y e x t e r i o r s o u r c e o f i g n

i t i o n , o p e n i n g s i n t o

d i r e c t – v e n t g a s a p p l i a n c e s , o r m e c h a n

i c a l v e n t i l a t i o n a i r

i n t a k e s .

2 ) N o p a r t

o f t h e u n d e r g r o u n d c o n t a i n e r

s h a l l b e l e s s t h a n

1 0 f t f r o m a n y

i m p o r t a n

t b u

i l d i n g o r

l i n e o

f a

d j o i n i n g p r o p e r t y

t h a t c a n b e b u i l t u p o n .

F e d e r a l , s t a t e , a n d l o c a l o r d i n a n c e s a n d r e g u l a t i o n s

s h o u

l d b e o b s e r v e d a t a l l t i m e s .

R e p r i n

t e d w

i t h p e r m

i s s

i o n

f r o m

N F P A 5 8 - 2

0 0

4 ,

L i q u e

e

d P e

t r o

l e u m

G a s

C o d

e ,

C o p y r i g

h t © 2 0 0 4

, N a

t i o n a

l F i r e

P r o

t e c

t i o n

A s s o c

i a t i o n ,

Q u

i n c y

, M A 0 2 2 6 9

.

T h i s r e p r i n t e

d m a

t e r i a

l i s n o

t t h e c o m p

l e t e a n

d o

f c

i a l p o s

i t i o n o

f t h e

N F P A o n

t h e r e

f e r e n c e

d s u

b j e c

t , w

h i c h i s

r e p r e s e n

t e d o n

l y b y

t h e s

t a n

d a r d

i n i t s e n

t i r e

t y .

A b o v e g r o u n d C o n t a i n e r N o t e s :

1 ) R

e g a r d l e s s o f s i z e a n y A S M E

c o n t a i n e r f i l l e d o n s i t e m u s t

b e l o c a t e d s o

t h a t

t h e f i l l i n g c o n n e c t i o n f i l l i n g c o

n n e c t i o n a n d l i q u i d f i x e d l i q u i d l e v e l g a u g e

v e n t

c o n n e c t i o n a t t h e c o n t a i n e r m

u s t b e a t l e s t 1 0 f t f r o m

a n y e

x t e r i o r s o u r c e

o f i g

n i t i o n , o p e n i n g s i n t o d i r e c t – v e

n t g a s a p p l i a n c e s , o r m e c h a n i c a l v e n t i l a t i o n

a i r i n

t a k e s .

2 ) T

h e d i s t a n c e i s m e a s u r e d h o r i z o n t a l l y f r o m

t h e p o i n t o f d i s

c h a r g e o f t h e

c o n t a i n e r p r e s s u r e r e l i e f v a l v e t o

a n y b u i l d i n g o p e n i n g b e l o w t h

e l e v e l o f t h e

r e l i e f v a l v e d i s c h a r g e .

3 ) T h i s d i s t a n c e m a y b e r e d u c e d t

o n o l e s s t h a n 1 0 f t f o r a s i n g l e c o n t a i n e r o f

1 2 0 0 g a l l o n w a t e r c a p a c i t y o r l e s s , i f t h e c o n t a i n e r i s l o c a t e d a t l e a

s t 2 5 f e e t f r o m

a n y

o t h e r L P - G a s c o n t a i n e r o f n o t m o r e t h a n 1 2 5 g a l l o n w a t e r c a p a c i t y .


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16

Pipe And Tubing Selection

Use the following simple method to assure the selection

of the correct sizes of piping and tubing for LP-Gas vaporsystems. Piping between the first and second stage is

considered, as well as lower pressure (2 PSIG) piping

between the 2 PSIG second stage or integral twin stage

regulator and the line pressure regulator; and low pressure

(inches of water column) piping between second stage,

single stage, or integral twin stage regulators and appliances.

The information supplied below is from NFPA 54 (National

Fuel Gas Code) Appendix C, and NFPA 58 (Liquefied

Petroleum Gas Code) Chapter 15; it can also be found in

CETP (Certified Employee Training Program) published

by the Propane Education and Research Council “Selecting

Piping and Tubing” module 4.1.8. These illustrations are

for demonstrative purposes, they are not intended for actualsystem design.


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D. Using Table 3 select proper size of tubing or pipe for

each section of piping, using values in BTU/hr for thelength determined from step #2-A. If exact length is

not on chart, use next longer length. Do not use any

other length for this purpose! Simply select the size

that shows at least as much capacity as needed for

each piping section.

3. For piping between first and second stage regulators

A. For a simple system with only one second stage regula-tor, merely measure length of piping required between

outlet of first stage regulator and inlet of second stage

regulator. Select piping or tubing required from Table

1.

B. For systems with multiple second stage regulators,

measure length of piping required to reach the second

stage regulator that is furthest away. Make a simplesketch, and size each leg of piping using Table 1, 2,

or 3 using values shown in column corresponding to

the length as measured above, same as when handling

second stage piping.


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Pipe And Tubing SelectionExample 1.

Determine the sizes of piping or tubing required for the

twin-stage LP-Gas installation shown.

Total piping length = 84 feet (use Table 3 @90 feet)

From a to b, demand = 38,000 + 35,000 + 30,000

= 103,000 BTU/hr; use 3/4” pipe

From b to c, demand = 38,000 + 35,000

= 73,000 BTU/hr; use 1/2” pipe or 3/4” tubing

From c to d, demand = 35,000 BTU/hr; use 1/2” pipe or 5/8” tubing

From c to e, demand = 38,000 BTU/hr; use 1/2” pipe or 5/8” tubing

From b to f, demand = 30,000 BTU/hr; use 1/2” pipe or 1/2” tubing


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19


Example 2.

Determine the sizes of piping or tubing required for thetwo-stage LP-Gas installation shown.

Total first stage piping length = 26 feet; first stage regulator set-ting is 10psig (use Table 1 or 2 @ 30 feet)

From aa to a, demand = 338,000 BTU/hr; use 1/2” pipe, 1/2” tub-

ing, or 1/2” T plastic pipe.

Total second stage piping length = 58 feet (use Table 3 @ 60 feet)

From a to b, demand = 338,000 BTU/hr; use 1” pipe

From b to c, demand = 138,000 BTU/hr; use 3/4” pipe or 7/8” tub-ing

From c to d, demand = 100,000 BTU/hr; use 1/2” pipe or 3/4” tubing

From d to e, demand = 35,000 BTU/hr; use 1/2” pipe or 1/2” tubing

From b to f, demand = 200,000 BTU/hr; use 3/4” pipe or 7/8” tub-

ing

From c to g, demand = 38,000 BTU/hr; use 1/2” pipe or 1/2” tubingFrom d to h, demand = 65,000 BTU/hr; use 1/2” pipe or 5/8” tubing


22/56

20


Example 3

Determine the sizes of piping or tubing required for the 2

PSI LP-Gas installation shown.

Total first stage piping length = 26 feet; first stage regulator set-

ting is 10psig (use Table 1 or 2 @ 30 feet)

Total 2 PSI Piping Length = 19 ft. (use Table 4 @ 20 ft. or Table

6 @ 20 ft.)

From aa to a, demand = 338,000 BTUuse 3/8” CSST or 1/2” copper tubing or 1/2” pipe

From Regulator a to each appliance:

From a to b, demand = 65,000 BTU; length = 25 ft. (Table 5),use 1/2” CSST

From a to c, demand = 200,000 BTU; length = 30 ft. (Table 5)use 3/4” CSST

From a to d, demand = 38,000 BTU; length = 21 ft.* (Table 5)

use 3/8” CSST *use 25 ft. column

From a to e, demand = 35,000 BTU; length = 40 ft. (Table 5)use 1/2” CSST


23/56

21

T a b l e 1

– F i r s t S t a g e P

i p e S i z i n g ( B e t w

e e n F i r s t a n d S e c o n d S t a g e R e g u l a t o r s

)

1 0 P S I G I n l e t w i t h a 1 P S I G P r e s s u

r e D r o p

M a x i m u m c a

p a c i t y o f p i p e o r t u b i n g

, i n t h o u s a n d s o f B T U / h r o r L P - G a s

* T o t a l l e n g t h o f p i p i n g f r o m o u t l e t o f f i r s t s t a g e r e

g u l a t o r t o i n l e t o f s e c o n d s t a t e r e g u l a t o r ( o r t o i n l e t o f s e c o n d s t a

g e r e g u l a t o r f u r t h e s t a w a y ) .

N o t e s : 1 ) T o a l l o w 2 P S I G p r e s s u r e d r o p , m u l t i p l y

t o t a l g a s d e m a n d b y . 7

0 7 , a n d

u s e c a p a c i t i e s f r o m t a b l e .

2 ) F o r d i f f e

r e n t f i r s t s t a g e p r e s s u r e s , m u l t i p l y t o t a l g a s d e m a n d b y t h e f o l l o w

i n g f a c t o r s , a n d u s e c a p a c i t i e s f

r o m t a b l e .

E x : 1 , 0

0 0 , 0

0 0 B T U l o a d a t 5 P S I : 1 , 0

0 0 , 0 0

0 ( 1 . 1

2 ) = 1 , 2

0 0 , 0

0 0 B T U

t h e n

u s e c h a r t b a s e s o n 1 , 2

0 0 , 0

0 0 B T U

F i r s t S

t a g e P r e s s u r e P S I G

M u l t i p l y B y

2 0

. 8

4 4

1 5

. 9

1 2

5

1 . 1

2 0

D a t a C a l c u l a t e d

p e r N F P A # 5 4 & 5 8

S i z e o f P i p e o r C

o p p e r

T u b i n g

, I n c h

e s

L e n g t h o f P i p e o r T u b i n g

, F e e t

1 0

2 0

3 0

4 0

5 0

6 0

7 0

8 0

9 0

1 0 0

C o p p e r

T u b i n g

( O . D . )

P i p e S i z e

⅜

”

5 5 8

3 8 3

3 0 9

2 6 5

2 3 5

2 1 3

1 9 6

1 8 2

1 7 1

1 6 1

½

”

1 3 8 7

8 7 0

7 0 0

5 9 9

5 3 1

4 8 1

4 4 3

4 1 2

3 8 6

3 6 5

⅝

”

2 3 6 0

1 6 2 2

1 3 0 3

1 1 1 5

9 8 8

8 9 6

8 2 4

7 6 7

7 1 9

6 7 9

¾

”

3 9 9 3

2 4 7 5

2 2 0 5

1 8 8 7

1 6 7 2

1 5 1 5

1 3 9 4

1 2 9 7

1 2 1 7

1 1 4 9

½

”

3 3 3 9

2 2 9 5

1 8 4 3

1 5 7 7

1 3 9 8

1 2 6 7

1 1 6 5

1 0 8 4

1 0 1 7

9 6 1

¾

”

6 9 8 2

4 7 9 9

3 8 5 4

3 2 9 8

2 9 2 3

2 6 4 9

2 4 3 7

2 2 6 7

2 1 2 7

2 0 0 9

1 ”

1 3 1 5 3

9 0 4 0

7 2 5 9

6 2 1 3

5 5 0 7

4 9 8 9

4 5 9 0

4 2 7 0

4 0 0 7

3 7 8 5

1 ¼ ”

2 7 0 0 4

1 8 5 6

0

1 4 9 0 4

1 2 7 5 6

1 1 3 0 6

1 0 2 4 4

9 4 2 4

8 7 6 7

8 2 2 6

7 7 7 0

1

½ ”

4 0 4 6 1

2 7 8 0

9

2 2 3 3 1

1 9 1 1 3

1 6 9 3 9

1 5 3 4 8

1 4 1 2 0

1 3 1 3 6

1 2 3 2 5

1 1 6 4 2

2

”

7 7 9 2 4

5 3 5 5

6

4 3 0 0 8

3 6 8 0 9

3 2 6 2 3

2 9 5 5 9

2 7 1 9 4

2 5 2 9 9

2 3 7 3 7

2 2 4 2 2

S i z e o f P i p e o r

C o p p e r

T u b i n g , I n c h e s

L e n g t h o f P i p e o r T u b i n g , F e

e t

1 2 5

1 5 0

1 7 5

2 0 0

2 2 5

2 5 0

2 7 5

3 0 0

3 5 0

4 0 0

C o p p e r

T u b i n g

( O . D . )

P i p e S i z e

⅜

”

1 4 2

1 3 0

1 1 8

1 1 1

1 0 4

9 0

8 9

8 9

8 2

7 6

½

”

3 2 3

2 9 3

2 6 9

2 5 1

2 3 5

2 2 2

2 1 1

2 0 1

1 8 5

1 7 2

⅝

”

6 0 1

5 4 6

5 0 2

4 6 7

4 3 8

4 1 4

3 9 3

3 7 5

3 4 5

3 2 1

¾

”

1 0 1 8

9 2 3

8 4 3

7 9 0

7 4 0

7 0 0

6 6 4

6 3 4

5 8 4

5 4 3

½

”

8 5 2

7 7 2

7 1 0

6 6 0

6 1 9

5 8 5

5 5 6

5 3 0

4 8 8

4 5 4

¾

”

1 7 8 0

1 6 1 3

1 4 8 4

1 3 8 1

1 2 9 6

1 2 2 4

1 1 6 2

1 1 0 9

1 0 2 0

9 4 9

1

”

3 3 5 4

3 0 3 9

2 7 9 6

2 6 0 1

2 4 4 1

2 3 0 5

2 1 9 0

2 0 8 9

1 9 2 2

1 7 8 8

1

¼ ”

6 8 8 7

6 2 4 0

5 7 4 1

5 3 4 0

5 0 1 1

4 7 3 3

4 4 9 5

4 2 8 9

3 9 4 5

3 6 7 0

1

½ ”

1 0 3 1 8

9 3 4

9

8 6 0 1

8 0 0 2

7 5 0 8

7 0 9 2

6 7 3 5

6 4 2 6

5 9 1 1

5 4 9 9

2

”

1 9 8 7 1

1 8 0 0

5

1 6 5 6 4

1 5 4 1 0

1 4 4 5 9

1 3 6 5 8

1 2 9 7 1

1 2 3 7 5

1 1 3 8 5

1 0 5 9 1


24/56

22

* T o t a l l e n g t h o f p i p i n g f r o m o u t l e t o f f i r s t s t a g e r e g

u l a t o r t o i n l e t o f s e c o n d s t a t e r e g u l a t o r o r t o i n l e t o f s e c o n d s t a g e r e g u l a t o r f u r t h e s t a w a y .

F i r s t S t

a g e P r e s s u r e P S I G

M u l t i p l y B y

2 0

. 8 4 4

1 5

. 9 1 2

5

1 . 1

2 0

D a t a C a l c u l a t e d

p e r N F P A # 5 4 & 5 8

T a b l e 2 –

F i r s t S t a g e P l a s t i c T u b i n g S i z i n g

1 0 P S I G I n l e t

w i t h a 1 P S I G P r e s s u r e D r o p

M a x i m u m c a p

a c i t y o f p l a s t i c t u b i n g i n t h o u s a n d s o f B T U / h r o f L P - G a s

S i z e o f P l a s t i c T

u b i n g

L e n g t h o f T u b i n g

, F e e t *

N P S

S D R

1 0

2 0

3 0

4 0

5 0

6 0

7 0

8 0

9 0

1 0 0

½ C

T S

7 . 0

0

1 3 8 7

9 5 4

7 6 2

6 5 3

5 7 8

5 2 4

4 8 2

4 4 8

4 2 1

3 9 7

½

9 . 3

3

3 9 0 1

2 6 8 1

2 1 4 3

1 8 3 5

1 6 2 6

1 4 7 3

1 3 5 5

1 2 6 1

1 1 8

3

1 1 1 7

¾

1 1

. 0 0

7 8 1 1

5 3 6 9

4 2 9 2

3 6 7 3

3 2 5 6

2 9 5 0

2 7 1 4

2 5 2 5

2 3 6

9

2 2 3 8

1 C T S

1 1

. 0 0

9 5 1 0

6 5 3 6

5 2 2 5

4 4 7 2

3 8 6 4

3 5 9 1

3 3 0 4

3 0 7 4

2 8 8

4

2 7 2 4

1

1 1

. 0 0

1 4 0 9 4

9 6 8 7

7 7 4 4

6 6 2 8

5 8 7 4

5 3 2 2

4 8 9 6

4 5 5 5

4 2 7

4

4 0 3 7

1 ¼

1 0

. 0 0

2 4 4 1 6

1 6 7 8 1

1 3 4 1 6

1 1 4 8 2

1 0 1 0 6

9 2 2 0

8 4 3 3

7 8 9 1

7 4 0

4

6 9 9 4

1 ½

1 1

. 0 0

-

-

2 0 2 6 0

1 7 3 4 0

1 5 3 6 8

1 3 9 2 4

1 2 8 1 0

1 1 9 1 8

1 1 1 8

2

1 0 5 6 2

2

1 1

. 0 0

6 6 2 5 1

4 5 5 3 4

3 6 4 0 2

3 1 1 5 5

2 7 6 1 2

2 5 0 1 9

2 3 0 1 7

2 1 4 1 3

2 0 0 9

1

1 8 9 7 8

S i z e o f P l a s t i c T

u b i n g

L e n g t h o f T u b i n g

, F e e t *

N P S

S D R

1 2 5

1 5 0

1 7 5

2 0 0

2 2 5

2 5 0

2 7 5

3 0 0

3 5 0

4 0 0

½ C

T S

7 .

0 0

3 5 2

3 1 9

2 9 4

2 7 3

2 5 6

2 4 2

2 3 0

2 1 9

2

0 2

1 8 8

½

9 .

3 3

9 9 0

8 9 7

8 2 6

7 7 8

7 2 1

6 8 1

6 4 6

6 1 7

5

6 7

5 2 8

¾

1

1 .

0 0

1 9 8 3

1 7 9 7

1 6 5 3

1 5 3 9

1 4 4 3

1 3 6 3

1 2 9 4

1 2 3 5

1 1

3 6

1 0 5 7

1 C T S

1

1 .

0 0

2 4 1 4

2 1 8 8

2 0 1 3

1 8 7 2

1 7 5 7

1 6 5 9

1 5 7 6

1 5 0 3

1 3

8 3

1 2 8 7

1

1

1 .

0 0

3 5 7 8

3 2 4 2

2 9 8 3

2 7 7 5

2 6 0 3

2 4 5 9

2 3 3 6

2 2 2 8

2 0

5 0

1 9 0 7

1 ¼

1

0 .

0 0

6 1 9 9

5 6 1 6

5 1 6 7

4 8 0 7

4 5 1 0

4 2 6 0

4 0 4 6

3 8 6 0

3 5

5 1

3 3 0 4

1 ½

1

1 .

0 0

9 3 6 1

8 4 8 2

7 8 0 3

7 2 5 9

6 8 1 1

6 4 3 4

6 1 1 1

5 8 3 0

5 3

6 3

4 9 8 9

2

1

1 .

0 0

1 6 8 2 0

1 5 2 4

0

1 4 0 2 0

1 3 0 4 3

1 2 2 3 8

1 1 5 6 0

1 0 9 7 9

1 0 4 7 4

9 6

3 6

8 9 6 5


25/56

23

T a b l e 3 – S e c o n d S t a g e o r I n t e g r a l T w

i n S t a g e P i p e

S i z i n g

1 1 I n c h e s W a t e r C o l u m n I n l e t w i t h a

1 / 2 I n c h W a t e r C o l u m

n D r o p

M a x i m u m c a

p a c i t y o f p i p e o r t u b i n g

i n t h o u s a n d s o f B T U / h

r o f L P - G a s

* T o t a l l e n g t h o f p

i p i n g f r o m o u t l e t o f r e g u l a t o r t o a

p p l i a n c e f u r t h e s t a w a y .

D a t a C a l c

u l a t e d p e r N F P A # 5 4 & 5 8

S i z e o f P i p e o r C o p p e r

T u b i n g

, I n c h e s

L

e n g t h o f P i p e o r T u b i n g

, F e

e t

1 2 5

1 5 0

1 7 5

2 0 0

2 2 5

2 5 0

2 7 5

3 0 0

3 5

0

4 0 0

C o p p e r T u b i n g

( O . D . )

P i p e S i z e

⅜

”

1 2

1 1

-

1 0

-

9

-

8

7

7

½

”

2 8

2 6

-

2 2

-

1 9

-

1 8

1

6

1 5

⅝

”

5 2

4 8

-

4 1

-

3 6

-

3 3

3

0

2 8

¾

”

8 9

8 0

-

6 9

-

6 1

-

5 5

5

1

4 7

⅞

”

1 3 7

1 2 4

-

1 0 6

-

9 4

-

8 5

7

8

7 3

½

”

7 4

6 7

6 2

5 8

5 4

5 1

4 8

4 6

4

3

4 0

¾

”

1 5 5

1 4 1

1 2 9

1 2 0

1 1 3

1 0 7

1 0 1

9 7

8

9

8 3

1

”

2 9 2

2 6 5

2 4 4

2 2 7

2 1 3

2 0 1

1 9 1

1 8 2

1 6

7

1 5 6

1

¼ ”

6 0 0

5 4 4

5 0 0

4 6 5

4 3 7

4 1 2

3 9 2

3 7 4

3 4

4

3 2 0

1

½ ”

8 9 9

8 1 5

7 4 9

6 9 7

6 5 4

6 1 8

5 8 7

5 6 0

5 1

5

4 7 9

2

”

1 7 3 1

1 5 6 9

1 4 4 3

1 3 4 3

1 2 6 0

1 1 9 0

1 1 3 0

1 0 7 8

9 9

2

9 2 3

S i z e o f P i p e o r C o p p e r

T u b i n g

, I n c h e s

L e

n g t h o f P i p e o r T u b i n g

, F e e t

1 0

2 0

3 0

4 0

5 0

6 0

7 0

8 0

9 0

1 0 0

C o p p e r T u b i n g

( O . D . )

P i p e S i z e

⅜

”

4 9

3 4

2 7

2 3

2 0

1 9

-

1 6

-

1 4

½

”

1 1 0

7 6

6 1

5 2

4 6

4 2

3 8

3 6

3 3

3 2

⅝

”

2 0 6

1 4

1

1 1 4

9 7

8 6

7 8

7 1

6 7

6 2

5 9

¾

”

3 4 8

2 3

9

1 9 2

1 6 4

1 4 6

1 3 2

1 2 0

1 1 3

1 0

5

1 0 0

⅞

”

5 3 6

3 6

8

2 9 6

2 5 3

2 2 4

2 0 3

1 8 5

1 7 4

1 6

1

1 5 4

½

”

2 9 1

2 0

0

1 6 1

1 3 7

1 2 2

1 1 0

1 0 2

9 4

8 7

8 4

¾

”

6 0 8

4 1

8

3 3 6

2 8 7

2 5 5

2 3 1

2 1 2

1 9 8

1 8

5

1 7 5

1

”

1 1 4 6

7 8

8

6 3 2

5 4 1

4 8 0

4 3 5

4 0 0

3 7 2

3 4

9

3 3 0

1

¼ ”

2 3 5 3

1 6 1 7

1 2 9 9

1 1 1 1

9 8 5

8 9 2

8 2 1

7 6 4

7 1

7

6 7 7

1

½ ”

3 5 2 5

2 4 2 3

1 9 4 6

1 6 6 5

1 4 7 6

1 3 3 7

1 2 3 0

1 1 4 4

1 0 7 4

1 0 1 4

2

”

6 7 8 9

4 6 6 6

3 7 4 7

3 2 0 7

2 8 4 2

2 5 7 5

2 3 6 9

2 2 0 4

2 0 6 8

1 9 5 4


26/56

24 T a b l e 4 - M

a x i m u m C a p a c i t y o f C S S T

I n T h o u s a n d s o f B T U p e r h o u r o f u n d i l u t e d L P - G a s e s

P r e s s u r e o f 2 p s i a n d a p r e s s u r e

d r o p o f 1 p s i ( B a s e d o n a 1 . 5 2 S p e c i f i c

G r a v i t y G a s ) *

S i z e

E H D * * F l o

w

D e s i g n a t i o n

L e n

g t h o f P i p e o r T u b i n g , F e e t

1 0

2 0

3 0

4 0

5 0

7 5

8 0

1 1 0

1 5 0

2 0 0

2 5 0

3 0 0

4 0 0

5 0 0

⅜ ”

1 3

4 2 6

2 6 2

2 3 8

2 0 3

1 8 1

1 4 7

1 4 0

1 2 4

1 0 1

8 6

7 7

6 9

6 0

5 3

1 5

5 5 8

3 4 7

3 1 6

2 7 1

2 4 3

1 9 6

1 8 9

1 6 9

1 3 7

1 1 8

1 0 5

9 6

8 2

7 2

½ ”

1 8

9 2 7

5 9 1

5 4 0

4 6 9

4 2 0

3 4 4

3 3 3

2 9 8

2 4 5

2 1 3

1 9 1

1 7 3

1 5 1

1 3 5

1 9

1 1 0 6

7 0 1

6 4 0

5 5 4

4 9 6

4 0 6

3 9 3

3 5 0

2 8 7

2 4 8

2 2 2

2 0 3

1 7 5

1 5 8

¾ ”

2 3

1 7 3 5

1 1 2 0

1 0 2 7

8 9 6

8 0 6

6 6 3

6 4 3

5 7 8

4 7 7

4 1 5

3 7 3

3 4 3

2 9 8

2 6 8

2 5

2 1 6 8

1 3 8 4

1 2 6 6

1 1 0 0

9 8 6

8 0 9

7 6 8

7 0 3

5 7 5

5 0 1

4 4 8

4 1 1

3 5 5

3 1 9

1 ”

3 0

4 0 9 7

2 5 6 0

2 3 3 1

2 0 1 2

1 7 9 4

1 4 5 7

1 4 1 0

1 2 5 6

1 0 2 1

8 8 0

7 8 5

7 1 6

6 1 6

5 5 0

3 1

4 7 2 0

2 9 5 4

2 6 9 2

2 3 2 3

2 0 7 2

1 6 8 5

1 6 2 9

1 4 5 4

1 1 8 2

1 0 1 9

9 1 0

8 2 9

7 1 6

6 3 8

T a b l e d o e s n o t i n c l u

d e e f f e c t o f p r e s s u r e d r o p a c r o s s t h e l i n e r e g u l a t o r . I f r e g u l a t o r l o

s s e x c e e d s 1 / 2 p s i ( b a s e d o n 1 3 i n . w a t e r c o l u m n o u t l e t p r e s -

s u r e ) , D O N O T U S E

T H I S T A B L E .

C o n s u l t w i t h r e g u

l a t o r m a n u f a c t u r e r f o r p r e s s u r e d r o p s a n d c a p a c i t y f a c t o r s .

P r e s s u r e d r o p s a c r o s s a r e g u l a t o r

m a y v a r y w i t h f l o w r

a t e .

C A U T I O N : C a p a c i t i e s s h o w n i n t a b l e m a y e x c e e d m

a x i m u m c a p a c i t y f o r a s e l e c t e d r e g u l a t o r . C o n s u l t w i t h r e g u l a t o r o r t u b i n g m a n u f a c t u r e r f o r g u i d -

a n c e .

* T a b l e i n c l u d e s l o s s e s f o r f o u r 9 0 - d e g r e e b e n d s a n d

t w o e n d f i t t i n g s .

T u b i n g r u n s w i t

h l a r g e r n u m b e r o f b e n d s a n d / o r

f i t t i n g s s h a l l b e i n c r e a s e d b y

a n e q u i v a l e n t l e n g t h

o f t u b i n g a c c o r d i n g t o t h e f o l l o w

i n g e q u a t i o n : L - 1 . 3 n w h e r e L i s a d d i t i o n a l l e n g t h ( f t ) o f t u b i n g a n

d n i s t h e n u m b e r o f a d d i t i o n a l

f i t t i n g s a n d / o r b e n d s

.

* * E H D – – E q u i v a l e n

t H y d r a u l i c D i a m e t e r – – A m e a s u r e o f t h e r e l a t i v e h y d r a u l i c e f f i c i e n c y b e t w e e n d i f f e r e n t t u b i n g s i z

e s .

T h e g r e a t e r t h e v a l u e o f

E H D ,

t h e g r e a t e r t h e g a s c a p a c i t y o f t h e t u b i n g .


27/56

25 T a b l e 5 - M

a x i m u m C a p a c i t y o f C S S T

I n T h o u s a n d s o f B T U p e r h o u r o f u n d

i l u t e d L P - G a s e s

P r e s s u r e o f 1 1

I n c h W a t e r C o l u m n a n

d a P r e s s u r e D r o p o f 0

. 5 I n c h W a t e r C o l u m n

( B a s e d o n a 1 . 5

2 S p e c i f i c G r a v i t y G a s ) *

* T a b l e i n c l u d e s l o s s e s f o r f o u r 9 0 - d e g r e e b e n d s a n d

t w o e n d f i t t i n g s .

T u b i n g r u n s w i t

h l a r g e r n u m b e r o f b e n d s a n d / o r

f i t t i n g s s h a l l b e i n c r e a s e d b y a n

e q u i v a l e n t

l e n g t h o f t u b i n g a c c o r d i n g t o t h e f o l l o w i n g e q u a t i o n :

L = 1 . 3 n w h e r e L i s a d d i t i o n a l l e n g t h ( f t ) o f t u b i n g a n d n i s t h e n u

m b e r o f a d d i t i o n a l f i t t i n g s a n d / o r

b e n d s .

* * E H D – – E q u i v a l e n

t H y d r a u l i c D i a m e t e r – – A m e a s u r e o f t h e r e l a t i v e h y d r a u l i c e f f i c i e n c y b e t w e e n d i f f e r e n t t u b i n g s i z

e s .

T h e g r e a t e r t h e v a l u e o f E H D ,

t h e

g r e a t e r t h e g a s c a p a c i t y o f t h e t u b i n g .

S i z e

E H D * * F

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l-545 servicemans manual

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