7715183 Piping System

8/6/2019 7715183 Piping System

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AMJ ENGINEERINGCONSULTANTS CO.,LTD.

PIPING SYSTEM


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CONTENT

1. PIPING STANDARD

2. VALVES3. EXPANSION ANDFLEXIBILITY

4. PIPE SUPPORTS

5. IDENTIFICATION OF


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PIPING STANDARD

THE DEFINITION

Piping

Tube or Tubing


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1. PIPING STANDARD

ASTM

American Society for Testingand Materials

ASTM A53

ASTM A106

ASTM B

88


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1. PIPING STANDARD

API

American Petroleum Institute

API 5L


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1. PIPING STANDARD

JIS

Japan Industrial Standard

JIS G 3452

JIS G 3454


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1. PIPING STANDARD

BS (EN STANDARD)

British Standard

BS 1387


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1. PIPING STANDARD

Standard Pipe Sized

Diameters of12 inch and less

standard weight pipe


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Proertiesof Commercial Steel Pi eNominal Wall inside

pipesize,outside a b c thickness,in diameter,indeameter,in

4 5S 0.083 4.334

4.500 10S 0.120 4.260

0.188 4.12440 Std 40S 0.237 4.026

80 XS 80S 0.337 3.826

120 0.437 3.626

0.500 3.500

160 0.531 3.438

XXS 0.674 3.152

0.800 2.900

0.925 2.650

Schedulenumber*


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1. PIPING STANDARD

Standard Pipe Sized

Over 12 inch


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Pr r r Pi ( ninud)

Nominal Wall inside

pipesize,outside a b c t ickness,in diameter,in

deameter,in

16 5 0165 15670

16000 10 0188 15624

10 0250 15500

20 0 12 15 76

0 td 0 75 15250

40 0500 15000

60 0656 14688

80 084 14 14100 10 1 1 8

120 1218 1 564

140 14 7 1 126

160 15 12814

cedulenumber*


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1. PIPING STANDARD

Piping Fabrication Methods

Electrical-Fusion Welding

Electric Resistance Welding (4inch OD and under)

Submerged-Are ElectricWelding (24 inch OD to 36inchOD)

Seamless Tubing and Pipe


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1. PIPING STANDARD

Piping Fabrication Methods

Forged, Turned and BoredTubing

Hollow-Forged Pipe andTubing


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1. PIPING STANDARD

Carbon-steel piping

ASTM A53

- Pressure limited at 600lb/in2 and high

temp.- Grade A (More ductile, lessstrength)


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1. PIPING STANDARD

Carbon-steel piping

ASTM A106- Pressure limited at 2500

lb/in2

- Grade A (More ductile, lessstrength)

-


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1. PIPING STANDARD

Chromium-molybdinum steelASTM A335 , Grade P11

- Temperature limited at 1000oF

ASTM A335 , Grade P22

- For temperatures from 950to 1050oF

ASTM A335 , Grade 5

-


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1. PIPING STANDARD

Chromium stainless steels

ASTM A3

12

, Grade TP3

04

ASTM A312, Grade TP316

ASTM A312, Grade TP347

- Temperature limited at1200oF


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1. PIPING STANDARD

Cast-iron and Ductile-Iron

pipe

ANSI 21.50(AWWA C150)

- Use for Water, Gas,Sewage, Drains etc.

- Underground and


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2. VALVES

Classification of Valves byMaterial

Brass

- Diameter 3 inch andsmaller

ASTM B61(Bronze Casting)

- Maximum temperature at500oF

ASTM B62 (CompositionBrass or Ounce MetalCasting)


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2. VALVES


Cast Iron

ASTM A126

- Diameter 2 inch and larger

- Limited pressure at 500lb/in for 12 inch andlarger

-


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2. VALVES


Cast Steel and Forged Steel- High temperature (>500oF)

- High strength- High ductility

- Shock resistance


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2. VALVES

Classification of Valves byTypes

Globe Type- Metal disc

- Plug disc

- Composition disc


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2. VALVES


Gate Type (Methods ofOperation)

- Outside screw and yoke(O.S. and Y)

- Inside screw, nonrisingstem

- Inside screw, rising stem


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2. VALVES


Gate Type (Disc Design)- The wedge-disc design

- The double-disc design


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2. VALVES


Check valve- Swing Check Valve

- Lift Check Valve


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2. VALVES

Valves Selection

Globe valves should be usedfor throttling services.


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2. VALVES

Valves Selection

For minimum pressure dropuse a gate valve


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2. VALVES

Valves Selection

If pressure drop is notimportant, a globe valve is

generally preferred because it

is easier to keep tightand repair than a gate valve.


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2. VALVES

Valves Selection

A safety or relief valve shouldalways be selected on the

basis of capacity, not on the

pipe size.


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2. VALVES

Installation

Always install a metal discglobe-type valve with the

pressure above disc, except

where it would bedangerous if the disc became

separated from the stem,


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2. VALVES

Installation

Composition disc valves willgive longer disc service if

installed with the pressure

under the disc.


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2. VALVES

Installation

When it is necessary to

throttle a valve to anextremely low flow, but where

a large volume of flow is

sometimes required, it isdesirable to install a valve,

proper for the maximum

flow in the line, with a by-pass


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2. VALVES

Installation

When screwing a valve on apiece of pipe, always put

wrench on the end of the valve

toward the pipe.


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2. VALVES

Installation

Never use a swing check valvein a vertical line unless the

normal flow is upward.


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2. VALVES

Installation

Always install a relief valve onthe outlet side of a pressure

regulator.


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2. VALVES

Installation

In a steam line, or any servicewhere condensation can

collect, be sure to pitch the

line downward toward thepoint of drainage.


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2. VALVES

Installation

Never support the weight ofpipe on wood or attach it at

any point to a wooden support.

If you do, the expansion andcontraction of the pipe may

cause severe noises.


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2. VALVES

Installation

It is unwise to use solderjoints in a line used for gas,

oil, or other flammable fluid.


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2. VALVES

Maintenance

All exposed moving parts,

such as the stem threadsand yoke sleeve of an O.S.&Y

valve, the fulcrum pins oflever-operated valves, and

all accessible points of friction,

should be lubricated.


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2. VALVES

Maintenance

Stuffing boxed should be

tightened when they beginto leak. If leakage continues,

the packing should bereplaced at the first

opportunity.


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2. VALVES

Maintenance

Any known valve seat leakage

should be examined andthe parts repaired as soon as

practicable.


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2. VALVES

Maintenance

If a globe-type valve disc

vibrates, it has probablebeen installed with the

pressure below the

disc. If so, the vibration can

generally be stopped by

removing the valve and


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2. VALVES

Operation

No valve should ever be closed

quickly in a liquid line. To do somight cause serious water

hammer unless proper air

chambers or shock absorbers

have been installed in the line.


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2. VALVES

Operation

If a valve is so hard to operate

that a persuader isrequired on the wheel, be sure

the persuader is not long

enough to damage the valve

parts.


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2. VALVES

Operation

If a valve is back-seated in the

open position and left longenough for the stem to cool andcontract, the load created by

the contraction may bind thevalve to a point where it cannotbe opened. If it is an OS & Y

valve, the yoke arms can be


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2. VALVES

Operation

Never throttle with a gate

valve, except in an emergency.


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2. VALVES General purpose valves


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3. EXPANSION AND

FLEXIBILITY Piping systems designed

- Will not fail because of

excessive stress.

- Will not produce excessive

thrusts or moments atconnected equipment.

- Will not leak at joints because


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3. EXPANSION AND

FLEXIBILITY Selection of Expansion joints

1. Pipe size

2. Temperature (minimum,

maximum and operating) ,

3. Pressure (minimum,maximum, operating and

test) ,


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3. EXPANSION AND


4. Medium handled (internally

or externally),

5. Traverse (axial)

6. Traverse (misalignment)


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3. EXPANSION AND


7. Type and schedule of end

flanges or schedule of weldends required.

8. Any limitations as to lengthor diameter.


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3. EXPANSION AND

FLEXIBILITY Installation of Expansion Joints

- Anchoring

- Guiding


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3. EXPANSION AND

FLEXIBILITY


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4. PIPE SUPPORTS

Suggested hanger spans

Pipe stresses

- For steel pipe are based on acombined bending andshear stress of1500psi

Deflection

- 1/10inch (2.54mm)


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4. PIPE SUPPORTS



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4. PIPE SUPPORTS



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4. PIPE SUPPORTS



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4. PIPE SUPPORTS



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4. PIPE SUPPORTS

Recommended hanger locations

Near concentrated load

Near horizontal changes in

direction


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4. PIPE SUPPORTS

Recommended hanger locations

Riser hangers

- 3/4 of span from the top

- 1/2 of span from the bottom

- Every floor


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4. PIPE SUPPORTS

Type of Hanger and Support


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4. PIPE SUPPORTS

Type of Hanger and Support

4 PIPE SUPPORTS


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4. PIPE SUPPORTS Type of Hanger and Support


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4. PIPE SUPPORTS Type of Hanger and Support


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PIPING Scheme for the Identification ofPiping Systems (ANSI A13.1-1981)

Class : F - Fire protectionequipment

Color : Red

...


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Class : D - Dangerous materialsColor : Yellow (or Orange)

...


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PIPING Scheme for the Identification ofPiping Systems (ANSI A13.1-1981)Class : S - Safe materials

Color : Green (or theachromatic colors, white,

black, gray or aluminum)

...


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Class : P - Protective materialsColor : Bright blue

...


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Class : V - Extra valuablematerials

Color : Deep purple

...

Documents

7715183 Piping System