Term Schedule Used in Pipe Nomenclature

Simply, the term "schedule" refers to the thickness of the walls of the pipe.

Hi,

Thanks for your response,you want say that if schedule 30 means the thickness is 30mm,also plz let me know the how we will designate or specify pipe which code to refer.

Looking forward for your response.

With regards.

Actually Schedule 30 does not reflects 30mm thick,that is the standard of astm/asme which manufacturer follows. same schedule pipe thickness will be change on pipe size.plz.refer astm/asme for relevent material.

hi,

Thanks,pl give me an example.

With regards

The higher the schedule number, the thicker the wall for the same size of pipe e.g. A 6" schedule 40 pipe has 7.11 mm wall thickness, whilst a 6" schedule 80 pipe has 10.67mm wall thickness....both values with piping to ANSI B36.19 & B36.10.

Get yourself a good piping catalog and all will be clear.

A website that I use is Chicago Tube and Iron.

A schedule 40 wall thickness for a particular diameter may not be the same wall thickness for a larger or smaller diameter pipe.

I think that most of the wall thicknesses were grandfathered in when the standards were developed. In other words, the primary manufacturers dictated what the wall thicknesses were based on their tooling. That is why there is no rhyme or reason. It also explains the differences between pipe sizes and tube sizes.

DDK

hello,

thanks for your response