What exactly is Sch 40 A53 made of? 1

[scoutkid]

I can't seem to find any info on what makes Sch 40 pipe, pipe. I know pipe is fairly brittle compared to tube. I know why tube is ductile, because i understand how it's made and what it contains, however, i can't find exact specs on Sch 40. Any help would be appreciated

Thanks guys



Tom

 

[IFRs]

Sch 40 refers only to the wall thickness of the pipe. As far as material properties, you can find them in the ASTM specification A-53.

I don't think that you can generalize that pipe is more brittle than tube. Cast iron pipe is very brittle, but you mentioned A53 in your question, which is not nearly so.

A-53 specifies chemical composition, tensile requirements, bending requiremdnts, flattening testing, hydrostatic testing, NDT of the weld seam (if present), workmanship, finish and appearance.

A-53 pipe comes in several types - Type F:Furnace-butt welded and continuous welded, Type E:Electric-resistance welded, Grades A and B and Type S:Seamless, grades A and B.

For example, A-53 Type S Grade B would be seamless, open-hearth, electric-furnace or basic-oxygen steel with 0.30% max carbon, 1.20% max Manganese, 0.05% max Phosphorus and 0.06% max Sulfur. The tensile requirements are 60,000 psi min, 35,000 psi yield.

This example is from the 1990 version which has surely been updated. Please get the latest version before proceeding further.

Hope this helps...

 

[kclim]

Schedule 40 refers to the nominal wall thickness rather than pipe material. You will find more information on a pipe schedule table (try a google search on the web).

The designation A53 refers to an ASTM standard

A53/A53M-02 Standard Specification for Pipe, Steel, Black and Hot-Dipped, Zinc-Coated, Welded and Seamless

I haven't seen the standard, but there should be fabrication and composition information in it, or at least references to documents which have that information.

 

[scoutkid]

thanks men, good answers. A53 looks to have a decent amount of carbon in it, but why does it have such a low yeild? I guess when im really looking for is a really good definition of the difference between 'pipe' and 'tube'. I have searched quite a bit, but i see no clear cut answer.


thanks agian,


tom

 

[GRoberts]

The main distinction between pipe and tube in my experiences is the dimensions. Pipe is made to NPS dimensions, ie. 1 1/2" pipe = 1.9" OD. Tube is made to rational dimensions, i.e. 1 1/2" tube = 1 1/2" O.D. Tubing can also be rectangular. Pipe cannot. The chemical analysis or mechanical properties of tube and pipe can be identical, but are usually made to different specifications, so may or may not be. There is no inherent difference between the two in that way. There may be other differences also since I'm not an expert in the pipe/tube industry.

 

[kclim]

The difference between pipe and tube? I've been told that tubes are specified by OD and pipes are specified by ID, but see the following link:

http://www.mcnichols.com/products/handrailcomponents/common/f_diffpipetube.htm

Says that tubes are specified by OD and thickness, while pipes are by a nominal size (or OD/ID if not known) and schedule

High carbon does not automatically give you a high yield strength, a lot of it will depend on heat treatment and fabrication (which can harden the steel).