Black steel pipe, sch 40 !
Black steel pipe, sch 40 !
(OP)
Can someone tell the difference between the following and whether both can be used for chilled water piping system as per codes.
1. Black Steel Pipe Sch 40, seamless, Grade B (ASTM A 53)
2. Black Steel Pipe Sch 40, ERW, Grade B (ASTM A53)
1. Black Steel Pipe Sch 40, seamless, Grade B (ASTM A 53)
2. Black Steel Pipe Sch 40, ERW, Grade B (ASTM A53)





RE: Black steel pipe, sch 40 !
What code.
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RE: Black steel pipe, sch 40 !
rmw
RE: Black steel pipe, sch 40 !
RE: Black steel pipe, sch 40 !
Where are you located and what Codes are you building this to (for example, do you have to meet NFPA Code?)
RE: Black steel pipe, sch 40 !
Can you be more specific, it's not the issue about sizes. It's about knowing the exact specs of a carbon steel pipe that one should use for these systems. I am located in middle east.
RE: Black steel pipe, sch 40 !
Some don't like ERW pipe below 2" NPS because they do not believe that adequate weld soundness testing can be properly accomplished at the smaller sizes. But for a Category D service most are not that fussy.
I personally would not buy A53 ERW from China at any size due to wide reports of problems with Chinese origin material of that type.
RE: Black steel pipe, sch 40 !
Either of the materials that you propose are acceptable for this service. Here are a couple of specifications for above grade chilled water pipe systems.
http://www.gsa.gov/portal/content/101297
http://www.iu.edu/~uao/15510.pdf