Offsets: Busada was one of the first plastics tubing and pipe manufactures to offer customers long radius sweeps, and we have done it for over 65 years. Before we had our advanced heaters, we would use hot oil, salt, glycol, vermiculite and other ways to heat the...
Radius
Quite often our customers ask us for bends without tangents. Mostly it is for aesthetic reasons, but often enough it is for a particular process need. Such bends bring a special challenge. Thermoplastics' bends, due to the requirement of secondary heating, have...
Here above we have an example of a larger OD tight-radius-bends. This one is a 4.750 OD tube bent on a 13" center-line radius. You will notice that the right side of the bend has an extended tangent and the accuracy of the bend is measured by the inside wall...
How to identify the radius of a bend for a bend less than 180 Degrees. Imagine if you got a picture like this in your email and your customer said, "make us one just like this." On top of that, they insist that this is a bend on a 24" radius. They can't ship you the...
This week we had a challenge. A customer ordered a specialty bend with 4 inch ID on a 20” Outside Radius. The bend was to have an extended tangent on one side of 15” and a short tangent of 1.125”. The customer wanted to put the bend directly into a chute for their...
We have a bunch of blogs on tight-radius bends, and of U bends. Here is one that we made for one of our puck-conveyance customers who needed something pizzazzie for a trade show. Cablevey is an international leader in puck conveyance and uses our tubing for sight...
Tight –radius bends are a problem to all tube benders. On a tight radius, we can run into excessive flattening, cracking of the outside wall, or buckling in the inside wall (most commonly). The problem is intensified in transparent, thermoplastics benders, for we do...
We have extruded oval tubing for over a decade, but this is the first time we extruded it in our PETG (Provista) formulation. PETG has some advantages over CAB in that it is FDA and NSF compliant with food contact, and our employed formula has passed the NFPA 286...
In July we received a print to bend tubing for a trade-show coffee roaster display. We had two weeks to meet a deadline. We elected to make the bends out of a 3" OD butyrate tubing with a .125 wall. The bend radii were as tight as 8" CLR. Dry ice worked as the...
We recently had quite a challenge from Metraflex regarding a transparent tight-radius 4” pipe 90° bend. They required a transparent 4” Sch 40 long-radius elbow to observe a metal fin in a fluid system. The pipe bend needed to maintain a tight tolerance for ovality as...
Recently we received a request for some “giant elbows, about a 15 ft. radius to load material up a silo. This was hard for me to comprehend— for these bends would be not only huge but bent three-dimensionally. When the prints and drawings came in this seemed...
We recently had an inquiry for a tight-radius Ubend. This 1" OD bend x .125w in CAB (butyrate) has a tight center-line radius of 2.5" with uneven tangents. Not only do we have to design the proper heater for this bend, and select the proper packing material, but have...
Sometimes we just have to be creative when we get calls from damsels in distress. We received a call from such a damsel who needed to replace a worn-out PVC tube and a more worn-out HDPE carrier. Busada pneumatic tubing consists of three major parts; the tube, the...
Recently we were given the challenge to produce a tight radius bend to replace a metal fruit chute (peaches). The bend needed a 6" ID and a tight 12" radius. We were able to accomplish this by flaring a 5" ID tube to 6.5" ID and bending the tube 3D to come under the...