Pressure Rating Effect of Bending Steel Pipe
Pressure Rating Effect of Bending Steel Pipe
(OP)
Hi group,
Please pardon an EE with a piping question. We use these little syphons (pic attached), often with an additional length of pipe and radiation shield, to protect pressure transmitters from liquid intrusion and high temperature when the fluid to be measured is steam. Have done it for a decades.
The syphon itself is 1/4" steel, seamless, continuous weld, Sch 80XS. According to ASME B 36.10 and ASTM A53 B, the working pressure is 871 psig and the burst pressure is out there in the 15,000+ psig range.
The question has come up in the office: Bent into the loop (cold bend, around a mandrel), what can I do to find or calculate a new allowable working pressure? The loop has a 2" diameter when measured at the centerline of the pipe. Just wanted to see is anyone has gone through this before I hire an engineer for analysis or a testing lab...
Please pardon an EE with a piping question. We use these little syphons (pic attached), often with an additional length of pipe and radiation shield, to protect pressure transmitters from liquid intrusion and high temperature when the fluid to be measured is steam. Have done it for a decades.
The syphon itself is 1/4" steel, seamless, continuous weld, Sch 80XS. According to ASME B 36.10 and ASTM A53 B, the working pressure is 871 psig and the burst pressure is out there in the 15,000+ psig range.
The question has come up in the office: Bent into the loop (cold bend, around a mandrel), what can I do to find or calculate a new allowable working pressure? The loop has a 2" diameter when measured at the centerline of the pipe. Just wanted to see is anyone has gone through this before I hire an engineer for analysis or a testing lab...
Good on ya,
Goober Dave
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RE: Pressure Rating Effect of Bending Steel Pipe
If it ain't broke, don't fix it. If it's not safe ... make it that way.
RE: Pressure Rating Effect of Bending Steel Pipe
Good on ya,
Goober Dave
Haven't see the forum policies? Do so now: Forum Policies
RE: Pressure Rating Effect of Bending Steel Pipe
You can measure with ultrasonics without cutting.
If it ain't broke, don't fix it. If it's not safe ... make it that way.