Can the wall thickness for butt weld pipe fittings be less than Light weight?
Can the wall thickness for butt weld pipe fittings be less than Light weight?
(OP)
Hi,
My question is regarding steel pipe fittings. I understand there are various wall thicknesses available for line pipes.
1) My question now is are the wall thickness for the butt weld fittings (elbows, tees, reducers etc.) limited to light weight, std., x-heavy etc.
In other words, can you have butt weld fittings with less than light wall thickness?
Another question I have is are reducers and Tees (butt weld) always seamless? Someone that knows about their manufacturing processes can please shed a light on this.
I have these questions because I am working retrospectively on Transmission pipelines.
Thank you.
My question is regarding steel pipe fittings. I understand there are various wall thicknesses available for line pipes.
1) My question now is are the wall thickness for the butt weld fittings (elbows, tees, reducers etc.) limited to light weight, std., x-heavy etc.
In other words, can you have butt weld fittings with less than light wall thickness?
Another question I have is are reducers and Tees (butt weld) always seamless? Someone that knows about their manufacturing processes can please shed a light on this.
I have these questions because I am working retrospectively on Transmission pipelines.
Thank you.





RE: Can the wall thickness for butt weld pipe fittings be less than Light weight?
"Standard" thicknesses are listed in ASME B 36.10 and the thinnest listed is termed schedule 5 in most pipe sizes, but even schedule 10 or schedule 20 is rarely specified or produced as it is simply too thin to do anything with and buckles and dents very easily. Thereofe what the specified minimum is and what you can actually get someone to supply are two different things.....
Tees are commonly produced using a forged fitting, but I think there was an answer on this the other day if you search for welded tees on this site.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Can the wall thickness for butt weld pipe fittings be less than Light weight?
RE: Can the wall thickness for butt weld pipe fittings be less than Light weight?
For carbon steels, the lightest schedule up to the point where STD is no longer sch40, is sch40. Schedules lighter than sch40 are rare up to that size, which is greater than 12" if I recall correctly but I could be totally wrong- look on a pipe table, which is what I would do.
RE: Can the wall thickness for butt weld pipe fittings be less than Light weight?
but it's actually sch. 5 and sch. 10.http://douglasbarwick.com/wp-content/uploads/Catal...
[ Added link to catalog of stainless steel "oddball" items and thin wall piping ]
RE: Can the wall thickness for butt weld pipe fittings be less than Light weight?
RE: Can the wall thickness for butt weld pipe fittings be less than Light weight?
Buttweld fittings are typically seamless because they are forged. The process of forging inherently produces seamless fittings. There can be some large diameter buttweld fittings that are fabricated/welded together to produce seams, but these seem rare nowadays. The industry I work in has all but replaced the large diameter fabricated buttweld fittings with seamless extruded ones (e.g. extruded tees).