ASTM A53 Type F, identifying 1

[marineram]

Is there a way to identify pipe in the field as ASTM A53 Type F (Furnace welded) by simply inspecting its exterior or interior? I would expect that the seam would be visible but would it look any different than Type E (Electric resistance welded)?

If it can't be identified by simple inspection, how would one identify it? I expect that cutting a cross section through the wall would reveal the seam joining method.

Thanks

 

[unclesyd]

Even though this is one of the most common pipe specs in use under 4" it normally carries no marking other than a stencil and some times not even that.

I looked at very few cross sections of A53F but I remember that in one case the weld was angled, more lap than a butt. A lot of the times I seen where the weld hadn't been smoothed out on the inside, there was a small protrusion at the weld. Also I’ve see a shallow groove on the outside
at the weld, especially true on the 1 1/2" and 2" galvanized.

I looked at the pipe a pipping supply co and there were no markings on the pipe other than a tag on the straps holding the bundle togather stating that it was A53F. This was true of both the black and galvanized.

 

[marineram]

Thanks Unclesyd,

Your feedback will be extremely useful. I have to inspect a ship where type F has potentially been used (by mistake, installer not knowing any better) in fuel oil and some low pressure hydraulic systems. Type F is not allowed (by ABS and USCG) in systems conveying combustible fluids. I'd hate to recommend removing the pipe and cutting a cross section only to find out its ERW or Seamless.

 

[unclesyd]

Marineram,
I've encountered the same problem in chemical piping but was fortunate enough to "when in doubt cut it out". Being on a ship I would imagine its' been painted so if one did stencil it the message is lost.

I called a friend at a local shipyard and asked him about how he handled this problem. He stated that they don't allow A53F on the yard just for the reasons you state. They build a number of passenger carrying boats and have to have pretty close tabs on material. This is odd as a piping supply house that carries the A53F is across the street.

I would call a reputable supplier that supplies the pipe and see if they may have some quick method of identifying the pipe. In the US someone like Chicago Tube might be able to help.