This subject looks familiar since mostly people also know and understand as well that pipe is a kind of tube. But im interested to share my experience, there is some misundertanding in this world, in people opinion, between the differences of pipe and tube. This is normally used by site person during inspection. The story began when my friend showed me about his training notebook, it mention the differences between pipe and tube as below tabel.
| PIPE | TUBE |
| Nominal dimension or measured diameter is ID(inside diameter) | Nominal dimension or measured diameter is OD(outside diameter) |
| Outside diameter depend on wall thickness of pipe called "schedule" | Inside diameter depend on wall thickness of Tube called "gauge" |
example : pipe 1/2" have ID 1/2" but tube 1/2" have OD 1/2"………………..correct or not????
If you find the same case with me, you cant judge it as a mistake. Above tabel is not fully wrong. Please look it more deeply. I make some correction as below.
| PIPE | TUBE |
| Nominal dimension (NPS-nominal pipe size), measured diameter is ID (inside diameter) only for sch STD size 12" and above. | Nominal dimension or measured diameter is OD(outside diameter) |
| Inside diameter depend on wall thickness of pipe called "schedule", OD based on ASME NPS standard but for size 14" and above just measure inch to mm size, e.g. 14"having OD 355.56mm. OD pipe always same. | inside diameter depend on wall thickness of tube called "gauge" |
Above tabel can be used when you do inspection so no need to bring thick handbook right!!
Pipe is quite similar to tube , aside from their appearance they can also used in some similar ways. But they also have their differences.
ReplyDeletegood subject, it can be explained even more better way.
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