Premium Only Content

2024 5052 6061 6063 7075 Anodized Aluminum Alloy Fishing Tube Aluminium Seamless Round Pipe
Structural and seamless tube are both extruded. That means a billet of material is forced through a hole in a die shaped to form the two dimensional cross-section you need. (We’ve called it the “toothpaste process” in the past and compared it to decorating a cake.)
Sometimes you want that extruded material to have a hole down the center. The simplest example is circular tube or pipe. for an explanation of the difference. Porthole and seamless are different ways of forming that hollow internal section.
In porthole, metal is forced around a shape that matches the hollow section you want to extrude. Physics being what it is, the tooling needs ribs to hold that shape in place, and the metal has to flow around them. That separates the metal as it extrudes, so a second die forces those sections back together. At the micro-structure level, the surfaces weld to each other, which means there’s a seam.
As the name suggests, seamless extruded tubes avoid this. The difference is that a forming mandrel is inserted into the billet of material from the rear, and pushed thorough until it’s very close to the opening in the die. The material flows through the gap, emerging with both internal and external dimensions fixed and without any seams.
-
13:18
Breaking Points
23 hours agoJeremy Scahill REVEALS Hamas Ceasefire Strategy
21.3K11 -
23:28
Liz Wheeler
16 hours agoLEAKED Big Pharma Plot to Destroy RFK Jr.
21.6K11 -
18:06
Actual Justice Warrior
15 hours agoMemphis Mayor REJECTS BLM Lies
27.8K16 -
15:45
BlaireWhite
21 hours agoYes, I'm Trans. Yes, I'm A Christian.
20.5K88 -
20:37
DeVory Darkins
20 hours ago $7.46 earnedDemocrats PANIC in fatal move as Jobs report leaves CNN DUMBFOUNDED
26.7K66 -
15:09
Nate The Lawyer
2 days ago $1.27 earnedThe End Of The Diddy Trial | Will the Jury Convict?
15.1K4 -
14:27
Peter Boghossian
2 days agoCommunist Anti-Woke vs. Capitalist Ultra-Woke: Who Wins?
11.6K8 -
3:08:11
Price of Reason
17 hours agoCongress PASSES Trump OBBB! Jurassic World Rebirth Review! Boxer Julio Cesar Chavez Jr. DEPORTED?
29.2K12 -
33:33
Solar Groove Muzic
1 day ago $13.52 earnedDeep House Mix 2025 | Best Vocal House Music
52K20 -
8:48:06
MyronGainesX
1 day ago $15.27 earnedFormer Fed Explains Why Diddy Beat The Feds! Democrats CRY Over The Big Beautiful Bill
57.7K30