Pipe Schedule number

It is not a formula, it just is. The charts found here may be of some help.

http://www.pipingdesigners.com/downloads/pipechart.htm

what is Schedule indicate?

what is Schedule indicate?

Follow the link provided by PennPiper and you should figure it out.

Thanks for your message. The site you mentioned was helpful.

Regards,

baier

PennPiper wrote:

It is not a formula, it just is. The charts found here may be of some help.

http://www.pipingdesigners.com/downloads/pipechart.htm

The "Machinery's Handbook" (Industrial Press Inc.) is a principal reference for mechanical design, at least in the US. In the section "pipe and pipe fittings" it contains history statements of pipe schedule and tables of dimensions based on industry size.

may i swiftly ask: what is the importance of the pipe schedule ? why is it used ?

thanks.

For me i use the schedule number for a quick and unique reference to the proper long description when compiling a bill of quantities. I use a bar code scanner for the purpose.

It will also assist the tenderer to prise the correct item.

pipe schedules refer to wall thickness. shedule 40 is thinner than schedule 80. the outside diameter remains the same. the inside diameter changes

HI,

DEAR SIR,

PIPE SIZE IS GIVEN IN IT'S NOMINAL SIZE,FOLOWED BY SCHEDULE NO.

THIS SCH. NO. IS HAVING SPECIFC WALL THICKNESS. AS PER EXAMPLE GIVEN BELLOW.

2" NW X SCH. 40 /40S /STD.WT. PIPE MEANS

OUT SIDE DIA OF PIPE IS 2.375" ( IT IS STDERED).

SCH. 40 /40S /STD.WT. IS PIPE WALL THICKNESS.IT IS 0.154"(SPECIFED)

AS THE SCH.NO INCREASES WALL THICKNESS OF PIPE INCREASES.

FOR 2" X SCH. 80 / 80S / XH (EXTRA HEAVY) W.THK. IS 0.218".(SPECIFIDE)

W.THK. IS NOT ALLOWED LESS THAN 87 1/2 % TO IT'S SPECIFIED THKNESS.

IF GIVE ME YOUR EMAIL ADRESS I CAN SEND YOU STD. CHART FOR PIPE.

THANK YOU.

V.D.DEODHAR.

Thanks everybody for your answers regarding pipe schedule number.

Regards,

baier

No Dear

There is no as such formula between OD/Thk and Schedule Number. However there is a formula between schedule number and Pressure rating. It is defined as : SN=1000P/S

where P is Pressure, and S is allowable stress.

for example a piping network is required to work at 40 Bar and material for selection is SS304 or equivalent series, the corresponding allowable stress depend on the operating temperature (say 115 MPa or ~100 MPa)

then SN = 1000*0.4/100 =40

Go for Schedule 40 Pipe.

Selection of Internal dia depend up the allowable pressure drop in a circuit.

N C Gupta

IPR

Pl Make it correct

SN = 1000*4/100

=40